1. 14 Jun, 2017 6 commits
  2. 07 Jun, 2017 34 commits
    • Greg Kroah-Hartman's avatar
      Linux 3.18.56 · 88ff45d0
      Greg Kroah-Hartman authored
      88ff45d0
    • Eric Sandeen's avatar
      xfs: fix unaligned access in xfs_btree_visit_blocks · c6444e02
      Eric Sandeen authored
      commit a4d768e7 upstream.
      
      This structure copy was throwing unaligned access warnings on sparc64:
      
      Kernel unaligned access at TPC[1043c088] xfs_btree_visit_blocks+0x88/0xe0 [xfs]
      
      xfs_btree_copy_ptrs does a memcpy, which avoids it.
      Signed-off-by: default avatarEric Sandeen <sandeen@redhat.com>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      c6444e02
    • Zorro Lang's avatar
      xfs: bad assertion for delalloc an extent that start at i_size · 0d600519
      Zorro Lang authored
      commit 892d2a5f upstream.
      
      By run fsstress long enough time enough in RHEL-7, I find an
      assertion failure (harder to reproduce on linux-4.11, but problem
      is still there):
      
        XFS: Assertion failed: (iflags & BMV_IF_DELALLOC) != 0, file: fs/xfs/xfs_bmap_util.c
      
      The assertion is in xfs_getbmap() funciton:
      
        if (map[i].br_startblock == DELAYSTARTBLOCK &&
      -->   map[i].br_startoff <= XFS_B_TO_FSB(mp, XFS_ISIZE(ip)))
                ASSERT((iflags & BMV_IF_DELALLOC) != 0);
      
      When map[i].br_startoff == XFS_B_TO_FSB(mp, XFS_ISIZE(ip)), the
      startoff is just at EOF. But we only need to make sure delalloc
      extents that are within EOF, not include EOF.
      Signed-off-by: default avatarZorro Lang <zlang@redhat.com>
      Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      0d600519
    • Brian Foster's avatar
      xfs: fix indlen accounting error on partial delalloc conversion · 6e12db5d
      Brian Foster authored
      commit 0daaecac upstream.
      
      The delalloc -> real block conversion path uses an incorrect
      calculation in the case where the middle part of a delalloc extent
      is being converted. This is documented as a rare situation because
      XFS generally attempts to maximize contiguity by converting as much
      of a delalloc extent as possible.
      
      If this situation does occur, the indlen reservation for the two new
      delalloc extents left behind by the conversion of the middle range
      is calculated and compared with the original reservation. If more
      blocks are required, the delta is allocated from the global block
      pool. This delta value can be characterized as the difference
      between the new total requirement (temp + temp2) and the currently
      available reservation minus those blocks that have already been
      allocated (startblockval(PREV.br_startblock) - allocated).
      
      The problem is that the current code does not account for previously
      allocated blocks correctly. It subtracts the current allocation
      count from the (new - old) delta rather than the old indlen
      reservation. This means that more indlen blocks than have been
      allocated end up stashed in the remaining extents and free space
      accounting is broken as a result.
      
      Fix up the calculation to subtract the allocated block count from
      the original extent indlen and thus correctly allocate the
      reservation delta based on the difference between the new total
      requirement and the unused blocks from the original reservation.
      Also remove a bogus assert that contradicts the fact that the new
      indlen reservation can be larger than the original indlen
      reservation.
      Signed-off-by: default avatarBrian Foster <bfoster@redhat.com>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      6e12db5d
    • Brian Foster's avatar
      xfs: fix up quotacheck buffer list error handling · 04c28605
      Brian Foster authored
      commit 20e8a063 upstream.
      
      The quotacheck error handling of the delwri buffer list assumes the
      resident buffers are locked and doesn't clear the _XBF_DELWRI_Q flag
      on the buffers that are dequeued. This can lead to assert failures
      on buffer release and possibly other locking problems.
      
      Move this code to a delwri queue cancel helper function to
      encapsulate the logic required to properly release buffers from a
      delwri queue. Update the helper to clear the delwri queue flag and
      call it from quotacheck.
      Signed-off-by: default avatarBrian Foster <bfoster@redhat.com>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      04c28605
    • Brian Foster's avatar
      xfs: prevent multi-fsb dir readahead from reading random blocks · 955f1151
      Brian Foster authored
      commit cb52ee33 upstream.
      
      Directory block readahead uses a complex iteration mechanism to map
      between high-level directory blocks and underlying physical extents.
      This mechanism attempts to traverse the higher-level dir blocks in a
      manner that handles multi-fsb directory blocks and simultaneously
      maintains a reference to the corresponding physical blocks.
      
      This logic doesn't handle certain (discontiguous) physical extent
      layouts correctly with multi-fsb directory blocks. For example,
      consider the case of a 4k FSB filesystem with a 2 FSB (8k) directory
      block size and a directory with the following extent layout:
      
       EXT: FILE-OFFSET      BLOCK-RANGE      AG AG-OFFSET        TOTAL
         0: [0..7]:          88..95            0 (88..95)             8
         1: [8..15]:         80..87            0 (80..87)             8
         2: [16..39]:        168..191          0 (168..191)          24
         3: [40..63]:        5242952..5242975  1 (72..95)            24
      
      Directory block 0 spans physical extents 0 and 1, dirblk 1 lies
      entirely within extent 2 and dirblk 2 spans extents 2 and 3. Because
      extent 2 is larger than the directory block size, the readahead code
      erroneously assumes the block is contiguous and issues a readahead
      based on the physical mapping of the first fsb of the dirblk. This
      results in read verifier failure and a spurious corruption or crc
      failure, depending on the filesystem format.
      
      Further, the subsequent readahead code responsible for walking
      through the physical table doesn't correctly advance the physical
      block reference for dirblk 2. Instead of advancing two physical
      filesystem blocks, the first iteration of the loop advances 1 block
      (correctly), but the subsequent iteration advances 2 more physical
      blocks because the next physical extent (extent 3, above) happens to
      cover more than dirblk 2. At this point, the higher-level directory
      block walking is completely off the rails of the actual physical
      layout of the directory for the respective mapping table.
      
      Update the contiguous dirblock logic to consider the current offset
      in the physical extent to avoid issuing directory readahead to
      unrelated blocks. Also, update the mapping table advancing code to
      consider the current offset within the current dirblock to avoid
      advancing the mapping reference too far beyond the dirblock.
      Signed-off-by: default avatarBrian Foster <bfoster@redhat.com>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      955f1151
    • Eric Sandeen's avatar
      xfs: handle array index overrun in xfs_dir2_leaf_readbuf() · c4d3116e
      Eric Sandeen authored
      commit 023cc840 upstream.
      
      Carlos had a case where "find" seemed to start spinning
      forever and never return.
      
      This was on a filesystem with non-default multi-fsb (8k)
      directory blocks, and a fragmented directory with extents
      like this:
      
      0:[0,133646,2,0]
      1:[2,195888,1,0]
      2:[3,195890,1,0]
      3:[4,195892,1,0]
      4:[5,195894,1,0]
      5:[6,195896,1,0]
      6:[7,195898,1,0]
      7:[8,195900,1,0]
      8:[9,195902,1,0]
      9:[10,195908,1,0]
      10:[11,195910,1,0]
      11:[12,195912,1,0]
      12:[13,195914,1,0]
      ...
      
      i.e. the first extent is a contiguous 2-fsb dir block, but
      after that it is fragmented into 1 block extents.
      
      At the top of the readdir path, we allocate a mapping array
      which (for this filesystem geometry) can hold 10 extents; see
      the assignment to map_info->map_size.  During readdir, we are
      therefore able to map extents 0 through 9 above into the array
      for readahead purposes.  If we count by 2, we see that the last
      mapped index (9) is the first block of a 2-fsb directory block.
      
      At the end of xfs_dir2_leaf_readbuf() we have 2 loops to fill
      more readahead; the outer loop assumes one full dir block is
      processed each loop iteration, and an inner loop that ensures
      that this is so by advancing to the next extent until a full
      directory block is mapped.
      
      The problem is that this inner loop may step past the last
      extent in the mapping array as it tries to reach the end of
      the directory block.  This will read garbage for the extent
      length, and as a result the loop control variable 'j' may
      become corrupted and never fail the loop conditional.
      
      The number of valid mappings we have in our array is stored
      in map->map_valid, so stop this inner loop based on that limit.
      
      There is an ASSERT at the top of the outer loop for this
      same condition, but we never made it out of the inner loop,
      so the ASSERT never fired.
      
      Huge appreciation for Carlos for debugging and isolating
      the problem.
      Debugged-and-analyzed-by: default avatarCarlos Maiolino <cmaiolino@redhat.com>
      Signed-off-by: default avatarEric Sandeen <sandeen@redhat.com>
      Tested-by: default avatarCarlos Maiolino <cmaiolino@redhat.com>
      Reviewed-by: default avatarCarlos Maiolino <cmaiolino@redhat.com>
      Reviewed-by: default avatarBill O'Donnell <billodo@redhat.com>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      c4d3116e
    • Darrick J. Wong's avatar
      xfs: fix over-copying of getbmap parameters from userspace · 8d5d3fb3
      Darrick J. Wong authored
      commit be6324c0 upstream.
      
      In xfs_ioc_getbmap, we should only copy the fields of struct getbmap
      from userspace, or else we end up copying random stack contents into the
      kernel.  struct getbmap is a strict subset of getbmapx, so a partial
      structure copy should work fine.
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      8d5d3fb3
    • Eryu Guan's avatar
      xfs: fix off-by-one on max nr_pages in xfs_find_get_desired_pgoff() · 4c890b8c
      Eryu Guan authored
      commit 8affebe1 upstream.
      
      xfs_find_get_desired_pgoff() is used to search for offset of hole or
      data in page range [index, end] (both inclusive), and the max number
      of pages to search should be at least one, if end == index.
      Otherwise the only page is missed and no hole or data is found,
      which is not correct.
      
      When block size is smaller than page size, this can be demonstrated
      by preallocating a file with size smaller than page size and writing
      data to the last block. E.g. run this xfs_io command on a 1k block
      size XFS on x86_64 host.
      
        # xfs_io -fc "falloc 0 3k" -c "pwrite 2k 1k" \
        	    -c "seek -d 0" /mnt/xfs/testfile
        wrote 1024/1024 bytes at offset 2048
        1 KiB, 1 ops; 0.0000 sec (33.675 MiB/sec and 34482.7586 ops/sec)
        Whence  Result
        DATA    EOF
      
      Data at offset 2k was missed, and lseek(2) returned ENXIO.
      
      This is uncovered by generic/285 subtest 07 and 08 on ppc64 host,
      where pagesize is 64k. Because a recent change to generic/285
      reduced the preallocated file size to smaller than 64k.
      Signed-off-by: default avatarEryu Guan <eguan@redhat.com>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4c890b8c
    • Jan Kara's avatar
      xfs: Fix missed holes in SEEK_HOLE implementation · 6a46eeae
      Jan Kara authored
      commit 5375023a upstream.
      
      XFS SEEK_HOLE implementation could miss a hole in an unwritten extent as
      can be seen by the following command:
      
      xfs_io -c "falloc 0 256k" -c "pwrite 0 56k" -c "pwrite 128k 8k"
             -c "seek -h 0" file
      wrote 57344/57344 bytes at offset 0
      56 KiB, 14 ops; 0.0000 sec (49.312 MiB/sec and 12623.9856 ops/sec)
      wrote 8192/8192 bytes at offset 131072
      8 KiB, 2 ops; 0.0000 sec (70.383 MiB/sec and 18018.0180 ops/sec)
      Whence	Result
      HOLE	139264
      
      Where we can see that hole at offset 56k was just ignored by SEEK_HOLE
      implementation. The bug is in xfs_find_get_desired_pgoff() which does
      not properly detect the case when pages are not contiguous.
      
      Fix the problem by properly detecting when found page has larger offset
      than expected.
      
      Fixes: d126d43fSigned-off-by: default avatarJan Kara <jack@suse.cz>
      Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      6a46eeae
    • Yisheng Xie's avatar
      mlock: fix mlock count can not decrease in race condition · aef16f4c
      Yisheng Xie authored
      commit 70feee0e upstream.
      
      Kefeng reported that when running the follow test, the mlock count in
      meminfo will increase permanently:
      
       [1] testcase
       linux:~ # cat test_mlockal
       grep Mlocked /proc/meminfo
        for j in `seq 0 10`
        do
       	for i in `seq 4 15`
       	do
       		./p_mlockall >> log &
       	done
       	sleep 0.2
       done
       # wait some time to let mlock counter decrease and 5s may not enough
       sleep 5
       grep Mlocked /proc/meminfo
      
       linux:~ # cat p_mlockall.c
       #include <sys/mman.h>
       #include <stdlib.h>
       #include <stdio.h>
      
       #define SPACE_LEN	4096
      
       int main(int argc, char ** argv)
       {
      	 	int ret;
      	 	void *adr = malloc(SPACE_LEN);
      	 	if (!adr)
      	 		return -1;
      
      	 	ret = mlockall(MCL_CURRENT | MCL_FUTURE);
      	 	printf("mlcokall ret = %d\n", ret);
      
      	 	ret = munlockall();
      	 	printf("munlcokall ret = %d\n", ret);
      
      	 	free(adr);
      	 	return 0;
      	 }
      
      In __munlock_pagevec() we should decrement NR_MLOCK for each page where
      we clear the PageMlocked flag.  Commit 1ebb7cc6 ("mm: munlock: batch
      NR_MLOCK zone state updates") has introduced a bug where we don't
      decrement NR_MLOCK for pages where we clear the flag, but fail to
      isolate them from the lru list (e.g.  when the pages are on some other
      cpu's percpu pagevec).  Since PageMlocked stays cleared, the NR_MLOCK
      accounting gets permanently disrupted by this.
      
      Fix it by counting the number of page whose PageMlock flag is cleared.
      
      Fixes: 1ebb7cc6 (" mm: munlock: batch NR_MLOCK zone state updates")
      Link: http://lkml.kernel.org/r/1495678405-54569-1-git-send-email-xieyisheng1@huawei.comSigned-off-by: default avatarYisheng Xie <xieyisheng1@huawei.com>
      Reported-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
      Tested-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
      Cc: Vlastimil Babka <vbabka@suse.cz>
      Cc: Joern Engel <joern@logfs.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michel Lespinasse <walken@google.com>
      Cc: Hugh Dickins <hughd@google.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Michal Hocko <mhocko@suse.cz>
      Cc: Xishi Qiu <qiuxishi@huawei.com>
      Cc: zhongjiang <zhongjiang@huawei.com>
      Cc: Hanjun Guo <guohanjun@huawei.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      aef16f4c
    • Punit Agrawal's avatar
      mm/migrate: fix refcount handling when !hugepage_migration_supported() · 85190aa1
      Punit Agrawal authored
      commit 30809f55 upstream.
      
      On failing to migrate a page, soft_offline_huge_page() performs the
      necessary update to the hugepage ref-count.
      
      But when !hugepage_migration_supported() , unmap_and_move_hugepage()
      also decrements the page ref-count for the hugepage.  The combined
      behaviour leaves the ref-count in an inconsistent state.
      
      This leads to soft lockups when running the overcommitted hugepage test
      from mce-tests suite.
      
        Soft offlining pfn 0x83ed600 at process virtual address 0x400000000000
        soft offline: 0x83ed600: migration failed 1, type 1fffc00000008008 (uptodate|head)
        INFO: rcu_preempt detected stalls on CPUs/tasks:
         Tasks blocked on level-0 rcu_node (CPUs 0-7): P2715
          (detected by 7, t=5254 jiffies, g=963, c=962, q=321)
          thugetlb_overco R  running task        0  2715   2685 0x00000008
          Call trace:
            dump_backtrace+0x0/0x268
            show_stack+0x24/0x30
            sched_show_task+0x134/0x180
            rcu_print_detail_task_stall_rnp+0x54/0x7c
            rcu_check_callbacks+0xa74/0xb08
            update_process_times+0x34/0x60
            tick_sched_handle.isra.7+0x38/0x70
            tick_sched_timer+0x4c/0x98
            __hrtimer_run_queues+0xc0/0x300
            hrtimer_interrupt+0xac/0x228
            arch_timer_handler_phys+0x3c/0x50
            handle_percpu_devid_irq+0x8c/0x290
            generic_handle_irq+0x34/0x50
            __handle_domain_irq+0x68/0xc0
            gic_handle_irq+0x5c/0xb0
      
      Address this by changing the putback_active_hugepage() in
      soft_offline_huge_page() to putback_movable_pages().
      
      This only triggers on systems that enable memory failure handling
      (ARCH_SUPPORTS_MEMORY_FAILURE) but not hugepage migration
      (!ARCH_ENABLE_HUGEPAGE_MIGRATION).
      
      I imagine this wasn't triggered as there aren't many systems running
      this configuration.
      
      [akpm@linux-foundation.org: remove dead comment, per Naoya]
      Link: http://lkml.kernel.org/r/20170525135146.32011-1-punit.agrawal@arm.comReported-by: default avatarManoj Iyer <manoj.iyer@canonical.com>
      Tested-by: default avatarManoj Iyer <manoj.iyer@canonical.com>
      Suggested-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Signed-off-by: default avatarPunit Agrawal <punit.agrawal@arm.com>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Wanpeng Li <wanpeng.li@hotmail.com>
      Cc: Christoph Lameter <cl@linux.com>
      Cc: Mel Gorman <mgorman@techsingularity.net>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      85190aa1
    • Patrik Jakobsson's avatar
      drm/gma500/psb: Actually use VBT mode when it is found · e7d2e465
      Patrik Jakobsson authored
      commit 82bc9a42 upstream.
      
      With LVDS we were incorrectly picking the pre-programmed mode instead of
      the prefered mode provided by VBT. Make sure we pick the VBT mode if
      one is provided. It is likely that the mode read-out code is still wrong
      but this patch fixes the immediate problem on most machines.
      
      Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78562Signed-off-by: default avatarPatrik Jakobsson <patrik.r.jakobsson@gmail.com>
      Link: http://patchwork.freedesktop.org/patch/msgid/20170418114332.12183-1-patrik.r.jakobsson@gmail.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e7d2e465
    • Thomas Gleixner's avatar
      slub/memcg: cure the brainless abuse of sysfs attributes · aa2f9ae3
      Thomas Gleixner authored
      commit 478fe303 upstream.
      
      memcg_propagate_slab_attrs() abuses the sysfs attribute file functions
      to propagate settings from the root kmem_cache to a newly created
      kmem_cache.  It does that with:
      
           attr->show(root, buf);
           attr->store(new, buf, strlen(bug);
      
      Aside of being a lazy and absurd hackery this is broken because it does
      not check the return value of the show() function.
      
      Some of the show() functions return 0 w/o touching the buffer.  That
      means in such a case the store function is called with the stale content
      of the previous show().  That causes nonsense like invoking
      kmem_cache_shrink() on a newly created kmem_cache.  In the worst case it
      would cause handing in an uninitialized buffer.
      
      This should be rewritten proper by adding a propagate() callback to
      those slub_attributes which must be propagated and avoid that insane
      conversion to and from ASCII, but that's too large for a hot fix.
      
      Check at least the return value of the show() function, so calling
      store() with stale content is prevented.
      
      Steven said:
       "It can cause a deadlock with get_online_cpus() that has been uncovered
        by recent cpu hotplug and lockdep changes that Thomas and Peter have
        been doing.
      
           Possible unsafe locking scenario:
      
                 CPU0                    CPU1
                 ----                    ----
            lock(cpu_hotplug.lock);
                                         lock(slab_mutex);
                                         lock(cpu_hotplug.lock);
            lock(slab_mutex);
      
           *** DEADLOCK ***"
      
      Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1705201244540.2255@nanosSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reported-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      Acked-by: default avatarDavid Rientjes <rientjes@google.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Michal Hocko <mhocko@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Christoph Lameter <cl@linux.com>
      Cc: Pekka Enberg <penberg@kernel.org>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Christoph Hellwig <hch@infradead.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      aa2f9ae3
    • Alexander Tsoy's avatar
      ALSA: hda - apply STAC_9200_DELL_M22 quirk for Dell Latitude D430 · 2c41aea2
      Alexander Tsoy authored
      commit 1fc2e41f upstream.
      
      This model is actually called 92XXM2-8 in Windows driver. But since pin
      configs for M22 and M28 are identical, just reuse M22 quirk.
      
      Fixes external microphone (tested) and probably docking station ports
      (not tested).
      Signed-off-by: default avatarAlexander Tsoy <alexander@tsoy.me>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      2c41aea2
    • Nicolas Iooss's avatar
      pcmcia: remove left-over %Z format · e102d49a
      Nicolas Iooss authored
      commit ff5a2016 upstream.
      
      Commit 5b5e0928 ("lib/vsprintf.c: remove %Z support") removed some
      usages of format %Z but forgot "%.2Zx".  This makes clang 4.0 reports a
      -Wformat-extra-args warning because it does not know about %Z.
      
      Replace %Z with %z.
      
      Link: http://lkml.kernel.org/r/20170520090946.22562-1-nicolas.iooss_linux@m4x.orgSigned-off-by: default avatarNicolas Iooss <nicolas.iooss_linux@m4x.org>
      Cc: Harald Welte <laforge@gnumonks.org>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e102d49a
    • Alex Deucher's avatar
      drm/radeon/ci: disable mclk switching for high refresh rates (v2) · efaeb8c1
      Alex Deucher authored
      commit 58d7e3e4 upstream.
      
      Even if the vblank period would allow it, it still seems to
      be problematic on some cards.
      
      v2: fix logic inversion (Nils)
      
      bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868Acked-by: default avatarChristian König <christian.koenig@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      efaeb8c1
    • Sebastian Reichel's avatar
      i2c: i2c-tiny-usb: fix buffer not being DMA capable · b54c9caa
      Sebastian Reichel authored
      commit 5165da59 upstream.
      
      Since v4.9 i2c-tiny-usb generates the below call trace
      and longer works, since it can't communicate with the
      USB device. The reason is, that since v4.9 the USB
      stack checks, that the buffer it should transfer is DMA
      capable. This was a requirement since v2.2 days, but it
      usually worked nevertheless.
      
      [   17.504959] ------------[ cut here ]------------
      [   17.505488] WARNING: CPU: 0 PID: 93 at drivers/usb/core/hcd.c:1587 usb_hcd_map_urb_for_dma+0x37c/0x570
      [   17.506545] transfer buffer not dma capable
      [   17.507022] Modules linked in:
      [   17.507370] CPU: 0 PID: 93 Comm: i2cdetect Not tainted 4.11.0-rc8+ #10
      [   17.508103] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
      [   17.509039] Call Trace:
      [   17.509320]  ? dump_stack+0x5c/0x78
      [   17.509714]  ? __warn+0xbe/0xe0
      [   17.510073]  ? warn_slowpath_fmt+0x5a/0x80
      [   17.510532]  ? nommu_map_sg+0xb0/0xb0
      [   17.510949]  ? usb_hcd_map_urb_for_dma+0x37c/0x570
      [   17.511482]  ? usb_hcd_submit_urb+0x336/0xab0
      [   17.511976]  ? wait_for_completion_timeout+0x12f/0x1a0
      [   17.512549]  ? wait_for_completion_timeout+0x65/0x1a0
      [   17.513125]  ? usb_start_wait_urb+0x65/0x160
      [   17.513604]  ? usb_control_msg+0xdc/0x130
      [   17.514061]  ? usb_xfer+0xa4/0x2a0
      [   17.514445]  ? __i2c_transfer+0x108/0x3c0
      [   17.514899]  ? i2c_transfer+0x57/0xb0
      [   17.515310]  ? i2c_smbus_xfer_emulated+0x12f/0x590
      [   17.515851]  ? _raw_spin_unlock_irqrestore+0x11/0x20
      [   17.516408]  ? i2c_smbus_xfer+0x125/0x330
      [   17.516876]  ? i2c_smbus_xfer+0x125/0x330
      [   17.517329]  ? i2cdev_ioctl_smbus+0x1c1/0x2b0
      [   17.517824]  ? i2cdev_ioctl+0x75/0x1c0
      [   17.518248]  ? do_vfs_ioctl+0x9f/0x600
      [   17.518671]  ? vfs_write+0x144/0x190
      [   17.519078]  ? SyS_ioctl+0x74/0x80
      [   17.519463]  ? entry_SYSCALL_64_fastpath+0x1e/0xad
      [   17.519959] ---[ end trace d047c04982f5ac50 ]---
      Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.co.uk>
      Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      Acked-by: default avatarTill Harbaum <till@harbaum.org>
      Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      b54c9caa
    • Davide Caratti's avatar
      sctp: fix ICMP processing if skb is non-linear · 698f506e
      Davide Caratti authored
      
      [ Upstream commit 804ec7eb ]
      
      sometimes ICMP replies to INIT chunks are ignored by the client, even if
      the encapsulated SCTP headers match an open socket. This happens when the
      ICMP packet is carried by a paged skb: use skb_header_pointer() to read
      packet contents beyond the SCTP header, so that chunk header and initiate
      tag are validated correctly.
      
      v2:
      - don't use skb_header_pointer() to read the transport header, since
        icmp_socket_deliver() already puts these 8 bytes in the linear area.
      - change commit message to make specific reference to INIT chunks.
      Signed-off-by: default avatarDavide Caratti <dcaratti@redhat.com>
      Acked-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
      Acked-by: default avatarVlad Yasevich <vyasevich@gmail.com>
      Reviewed-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      698f506e
    • Wei Wang's avatar
      tcp: avoid fastopen API to be used on AF_UNSPEC · 4507a04e
      Wei Wang authored
      
      [ Upstream commit ba615f67 ]
      
      Fastopen API should be used to perform fastopen operations on the TCP
      socket. It does not make sense to use fastopen API to perform disconnect
      by calling it with AF_UNSPEC. The fastopen data path is also prone to
      race conditions and bugs when using with AF_UNSPEC.
      
      One issue reported and analyzed by Vegard Nossum is as follows:
      +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
      Thread A:                            Thread B:
      ------------------------------------------------------------------------
      sendto()
       - tcp_sendmsg()
           - sk_stream_memory_free() = 0
               - goto wait_for_sndbuf
      	     - sk_stream_wait_memory()
      	        - sk_wait_event() // sleep
                |                          sendto(flags=MSG_FASTOPEN, dest_addr=AF_UNSPEC)
      	  |                           - tcp_sendmsg()
      	  |                              - tcp_sendmsg_fastopen()
      	  |                                 - __inet_stream_connect()
      	  |                                    - tcp_disconnect() //because of AF_UNSPEC
      	  |                                       - tcp_transmit_skb()// send RST
      	  |                                    - return 0; // no reconnect!
      	  |                           - sk_stream_wait_connect()
      	  |                                 - sock_error()
      	  |                                    - xchg(&sk->sk_err, 0)
      	  |                                    - return -ECONNRESET
      	- ... // wake up, see sk->sk_err == 0
          - skb_entail() on TCP_CLOSE socket
      
      If the connection is reopened then we will send a brand new SYN packet
      after thread A has already queued a buffer. At this point I think the
      socket internal state (sequence numbers etc.) becomes messed up.
      
      When the new connection is closed, the FIN-ACK is rejected because the
      sequence number is outside the window. The other side tries to
      retransmit,
      but __tcp_retransmit_skb() calls tcp_trim_head() on an empty skb which
      corrupts the skb data length and hits a BUG() in copy_and_csum_bits().
      +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
      
      Hence, this patch adds a check for AF_UNSPEC in the fastopen data path
      and return EOPNOTSUPP to user if such case happens.
      
      Fixes: cf60af03 ("tcp: Fast Open client - sendmsg(MSG_FASTOPEN)")
      Reported-by: default avatarVegard Nossum <vegard.nossum@oracle.com>
      Signed-off-by: default avatarWei Wang <weiwan@google.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4507a04e
    • Eric Dumazet's avatar
      ipv6: fix out of bound writes in __ip6_append_data() · 1d31de23
      Eric Dumazet authored
      
      [ Upstream commit 232cd35d ]
      
      Andrey Konovalov and idaifish@gmail.com reported crashes caused by
      one skb shared_info being overwritten from __ip6_append_data()
      
      Andrey program lead to following state :
      
      copy -4200 datalen 2000 fraglen 2040
      maxfraglen 2040 alloclen 2048 transhdrlen 0 offset 0 fraggap 6200
      
      The skb_copy_and_csum_bits(skb_prev, maxfraglen, data + transhdrlen,
      fraggap, 0); is overwriting skb->head and skb_shared_info
      
      Since we apparently detect this rare condition too late, move the
      code earlier to even avoid allocating skb and risking crashes.
      
      Once again, many thanks to Andrey and syzkaller team.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Tested-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Reported-by: <idaifish@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      1d31de23
    • Bjørn Mork's avatar
      qmi_wwan: add another Lenovo EM74xx device ID · cc870923
      Bjørn Mork authored
      
      [ Upstream commit 486181bc ]
      
      In their infinite wisdom, and never ending quest for end user frustration,
      Lenovo has decided to use a new USB device ID for the wwan modules in
      their 2017 laptops.  The actual hardware is still the Sierra Wireless
      EM7455 or EM7430, depending on region.
      Signed-off-by: default avatarBjørn Mork <bjorn@mork.no>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      cc870923
    • David S. Miller's avatar
      ipv6: Check ip6_find_1stfragopt() return value properly. · ef4656af
      David S. Miller authored
      
      [ Upstream commit 7dd7eb95 ]
      
      Do not use unsigned variables to see if it returns a negative
      error or not.
      
      Fixes: 2423496a ("ipv6: Prevent overrun when parsing v6 header options")
      Reported-by: default avatarJulia Lawall <julia.lawall@lip6.fr>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      ef4656af
    • Craig Gallek's avatar
      ipv6: Prevent overrun when parsing v6 header options · 5ca68dbb
      Craig Gallek authored
      
      [ Upstream commit 2423496a ]
      
      The KASAN warning repoted below was discovered with a syzkaller
      program.  The reproducer is basically:
        int s = socket(AF_INET6, SOCK_RAW, NEXTHDR_HOP);
        send(s, &one_byte_of_data, 1, MSG_MORE);
        send(s, &more_than_mtu_bytes_data, 2000, 0);
      
      The socket() call sets the nexthdr field of the v6 header to
      NEXTHDR_HOP, the first send call primes the payload with a non zero
      byte of data, and the second send call triggers the fragmentation path.
      
      The fragmentation code tries to parse the header options in order
      to figure out where to insert the fragment option.  Since nexthdr points
      to an invalid option, the calculation of the size of the network header
      can made to be much larger than the linear section of the skb and data
      is read outside of it.
      
      This fix makes ip6_find_1stfrag return an error if it detects
      running out-of-bounds.
      
      [   42.361487] ==================================================================
      [   42.364412] BUG: KASAN: slab-out-of-bounds in ip6_fragment+0x11c8/0x3730
      [   42.365471] Read of size 840 at addr ffff88000969e798 by task ip6_fragment-oo/3789
      [   42.366469]
      [   42.366696] CPU: 1 PID: 3789 Comm: ip6_fragment-oo Not tainted 4.11.0+ #41
      [   42.367628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.1-1ubuntu1 04/01/2014
      [   42.368824] Call Trace:
      [   42.369183]  dump_stack+0xb3/0x10b
      [   42.369664]  print_address_description+0x73/0x290
      [   42.370325]  kasan_report+0x252/0x370
      [   42.370839]  ? ip6_fragment+0x11c8/0x3730
      [   42.371396]  check_memory_region+0x13c/0x1a0
      [   42.371978]  memcpy+0x23/0x50
      [   42.372395]  ip6_fragment+0x11c8/0x3730
      [   42.372920]  ? nf_ct_expect_unregister_notifier+0x110/0x110
      [   42.373681]  ? ip6_copy_metadata+0x7f0/0x7f0
      [   42.374263]  ? ip6_forward+0x2e30/0x2e30
      [   42.374803]  ip6_finish_output+0x584/0x990
      [   42.375350]  ip6_output+0x1b7/0x690
      [   42.375836]  ? ip6_finish_output+0x990/0x990
      [   42.376411]  ? ip6_fragment+0x3730/0x3730
      [   42.376968]  ip6_local_out+0x95/0x160
      [   42.377471]  ip6_send_skb+0xa1/0x330
      [   42.377969]  ip6_push_pending_frames+0xb3/0xe0
      [   42.378589]  rawv6_sendmsg+0x2051/0x2db0
      [   42.379129]  ? rawv6_bind+0x8b0/0x8b0
      [   42.379633]  ? _copy_from_user+0x84/0xe0
      [   42.380193]  ? debug_check_no_locks_freed+0x290/0x290
      [   42.380878]  ? ___sys_sendmsg+0x162/0x930
      [   42.381427]  ? rcu_read_lock_sched_held+0xa3/0x120
      [   42.382074]  ? sock_has_perm+0x1f6/0x290
      [   42.382614]  ? ___sys_sendmsg+0x167/0x930
      [   42.383173]  ? lock_downgrade+0x660/0x660
      [   42.383727]  inet_sendmsg+0x123/0x500
      [   42.384226]  ? inet_sendmsg+0x123/0x500
      [   42.384748]  ? inet_recvmsg+0x540/0x540
      [   42.385263]  sock_sendmsg+0xca/0x110
      [   42.385758]  SYSC_sendto+0x217/0x380
      [   42.386249]  ? SYSC_connect+0x310/0x310
      [   42.386783]  ? __might_fault+0x110/0x1d0
      [   42.387324]  ? lock_downgrade+0x660/0x660
      [   42.387880]  ? __fget_light+0xa1/0x1f0
      [   42.388403]  ? __fdget+0x18/0x20
      [   42.388851]  ? sock_common_setsockopt+0x95/0xd0
      [   42.389472]  ? SyS_setsockopt+0x17f/0x260
      [   42.390021]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
      [   42.390650]  SyS_sendto+0x40/0x50
      [   42.391103]  entry_SYSCALL_64_fastpath+0x1f/0xbe
      [   42.391731] RIP: 0033:0x7fbbb711e383
      [   42.392217] RSP: 002b:00007ffff4d34f28 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
      [   42.393235] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbbb711e383
      [   42.394195] RDX: 0000000000001000 RSI: 00007ffff4d34f60 RDI: 0000000000000003
      [   42.395145] RBP: 0000000000000046 R08: 00007ffff4d34f40 R09: 0000000000000018
      [   42.396056] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400aad
      [   42.396598] R13: 0000000000000066 R14: 00007ffff4d34ee0 R15: 00007fbbb717af00
      [   42.397257]
      [   42.397411] Allocated by task 3789:
      [   42.397702]  save_stack_trace+0x16/0x20
      [   42.398005]  save_stack+0x46/0xd0
      [   42.398267]  kasan_kmalloc+0xad/0xe0
      [   42.398548]  kasan_slab_alloc+0x12/0x20
      [   42.398848]  __kmalloc_node_track_caller+0xcb/0x380
      [   42.399224]  __kmalloc_reserve.isra.32+0x41/0xe0
      [   42.399654]  __alloc_skb+0xf8/0x580
      [   42.400003]  sock_wmalloc+0xab/0xf0
      [   42.400346]  __ip6_append_data.isra.41+0x2472/0x33d0
      [   42.400813]  ip6_append_data+0x1a8/0x2f0
      [   42.401122]  rawv6_sendmsg+0x11ee/0x2db0
      [   42.401505]  inet_sendmsg+0x123/0x500
      [   42.401860]  sock_sendmsg+0xca/0x110
      [   42.402209]  ___sys_sendmsg+0x7cb/0x930
      [   42.402582]  __sys_sendmsg+0xd9/0x190
      [   42.402941]  SyS_sendmsg+0x2d/0x50
      [   42.403273]  entry_SYSCALL_64_fastpath+0x1f/0xbe
      [   42.403718]
      [   42.403871] Freed by task 1794:
      [   42.404146]  save_stack_trace+0x16/0x20
      [   42.404515]  save_stack+0x46/0xd0
      [   42.404827]  kasan_slab_free+0x72/0xc0
      [   42.405167]  kfree+0xe8/0x2b0
      [   42.405462]  skb_free_head+0x74/0xb0
      [   42.405806]  skb_release_data+0x30e/0x3a0
      [   42.406198]  skb_release_all+0x4a/0x60
      [   42.406563]  consume_skb+0x113/0x2e0
      [   42.406910]  skb_free_datagram+0x1a/0xe0
      [   42.407288]  netlink_recvmsg+0x60d/0xe40
      [   42.407667]  sock_recvmsg+0xd7/0x110
      [   42.408022]  ___sys_recvmsg+0x25c/0x580
      [   42.408395]  __sys_recvmsg+0xd6/0x190
      [   42.408753]  SyS_recvmsg+0x2d/0x50
      [   42.409086]  entry_SYSCALL_64_fastpath+0x1f/0xbe
      [   42.409513]
      [   42.409665] The buggy address belongs to the object at ffff88000969e780
      [   42.409665]  which belongs to the cache kmalloc-512 of size 512
      [   42.410846] The buggy address is located 24 bytes inside of
      [   42.410846]  512-byte region [ffff88000969e780, ffff88000969e980)
      [   42.411941] The buggy address belongs to the page:
      [   42.412405] page:ffffea000025a780 count:1 mapcount:0 mapping:          (null) index:0x0 compound_mapcount: 0
      [   42.413298] flags: 0x100000000008100(slab|head)
      [   42.413729] raw: 0100000000008100 0000000000000000 0000000000000000 00000001800c000c
      [   42.414387] raw: ffffea00002a9500 0000000900000007 ffff88000c401280 0000000000000000
      [   42.415074] page dumped because: kasan: bad access detected
      [   42.415604]
      [   42.415757] Memory state around the buggy address:
      [   42.416222]  ffff88000969e880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
      [   42.416904]  ffff88000969e900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
      [   42.417591] >ffff88000969e980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [   42.418273]                    ^
      [   42.418588]  ffff88000969ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
      [   42.419273]  ffff88000969ea80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
      [   42.419882] ==================================================================
      Reported-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Signed-off-by: default avatarCraig Gallek <kraig@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      5ca68dbb
    • Soheil Hassas Yeganeh's avatar
      tcp: eliminate negative reordering in tcp_clean_rtx_queue · 94107068
      Soheil Hassas Yeganeh authored
      
      [ Upstream commit bafbb9c7 ]
      
      tcp_ack() can call tcp_fragment() which may dededuct the
      value tp->fackets_out when MSS changes. When prior_fackets
      is larger than tp->fackets_out, tcp_clean_rtx_queue() can
      invoke tcp_update_reordering() with negative values. This
      results in absurd tp->reodering values higher than
      sysctl_tcp_max_reordering.
      
      Note that tcp_update_reordering indeeds sets tp->reordering
      to min(sysctl_tcp_max_reordering, metric), but because
      the comparison is signed, a negative metric always wins.
      
      Fixes: c7caf8d3 ("[TCP]: Fix reord detection due to snd_una covered holes")
      Reported-by: default avatarRebecca Isaacs <risaacs@google.com>
      Signed-off-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
      Signed-off-by: default avatarNeal Cardwell <ncardwell@google.com>
      Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      94107068
    • Eric Dumazet's avatar
      sctp: do not inherit ipv6_{mc|ac|fl}_list from parent · 56fd34c6
      Eric Dumazet authored
      
      [ Upstream commit fdcee2cb ]
      
      SCTP needs fixes similar to 83eaddab ("ipv6/dccp: do not inherit
      ipv6_mc_list from parent"), otherwise bad things can happen.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Tested-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      56fd34c6
    • Xin Long's avatar
      sctp: fix src address selection if using secondary addresses for ipv6 · dc03072a
      Xin Long authored
      
      [ Upstream commit dbc2b5e9 ]
      
      Commit 0ca50d12 ("sctp: fix src address selection if using secondary
      addresses") has fixed a src address selection issue when using secondary
      addresses for ipv4.
      
      Now sctp ipv6 also has the similar issue. When using a secondary address,
      sctp_v6_get_dst tries to choose the saddr which has the most same bits
      with the daddr by sctp_v6_addr_match_len. It may make some cases not work
      as expected.
      
      hostA:
        [1] fd21:356b:459a:cf10::11 (eth1)
        [2] fd21:356b:459a:cf20::11 (eth2)
      
      hostB:
        [a] fd21:356b:459a:cf30::2  (eth1)
        [b] fd21:356b:459a:cf40::2  (eth2)
      
      route from hostA to hostB:
        fd21:356b:459a:cf30::/64 dev eth1  metric 1024  mtu 1500
      
      The expected path should be:
        fd21:356b:459a:cf10::11 <-> fd21:356b:459a:cf30::2
      But addr[2] matches addr[a] more bits than addr[1] does, according to
      sctp_v6_addr_match_len. It causes the path to be:
        fd21:356b:459a:cf20::11 <-> fd21:356b:459a:cf30::2
      
      This patch is to fix it with the same way as Marcelo's fix for sctp ipv4.
      As no ip_dev_find for ipv6, this patch is to use ipv6_chk_addr to check
      if the saddr is in a dev instead.
      
      Note that for backwards compatibility, it will still do the addr_match_len
      check here when no optimal is found.
      Reported-by: default avatarPatrick Talbert <ptalbert@redhat.com>
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      dc03072a
    • Yuchung Cheng's avatar
      tcp: avoid fragmenting peculiar skbs in SACK · b1ff990a
      Yuchung Cheng authored
      
      [ Upstream commit b451e5d2 ]
      
      This patch fixes a bug in splitting an SKB during SACK
      processing. Specifically if an skb contains multiple
      packets and is only partially sacked in the higher sequences,
      tcp_match_sack_to_skb() splits the skb and marks the second fragment
      as SACKed.
      
      The current code further attempts rounding up the first fragment
      to MSS boundaries. But it misses a boundary condition when the
      rounded-up fragment size (pkt_len) is exactly skb size.  Spliting
      such an skb is pointless and causses a kernel warning and aborts
      the SACK processing. This patch universally checks such over-split
      before calling tcp_fragment to prevent these unnecessary warnings.
      
      Fixes: adb92db8 ("tcp: Make SACK code to split only at mss boundaries")
      Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
      Acked-by: default avatarNeal Cardwell <ncardwell@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      b1ff990a
    • Julian Wiedmann's avatar
      s390/qeth: avoid null pointer dereference on OSN · de66696e
      Julian Wiedmann authored
      
      [ Upstream commit 25e2c341 ]
      
      Access card->dev only after checking whether's its valid.
      Signed-off-by: default avatarJulian Wiedmann <jwi@linux.vnet.ibm.com>
      Reviewed-by: default avatarUrsula Braun <ubraun@linux.vnet.ibm.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      de66696e
    • Julian Wiedmann's avatar
      s390/qeth: unbreak OSM and OSN support · 4c814829
      Julian Wiedmann authored
      
      [ Upstream commit 2d2ebb3e ]
      
      commit b4d72c08 ("qeth: bridgeport support - basic control")
      broke the support for OSM and OSN devices as follows:
      
      As OSM and OSN are L2 only, qeth_core_probe_device() does an early
      setup by loading the l2 discipline and calling qeth_l2_probe_device().
      In this context, adding the l2-specific bridgeport sysfs attributes
      via qeth_l2_create_device_attributes() hits a BUG_ON in fs/sysfs/group.c,
      since the basic sysfs infrastructure for the device hasn't been
      established yet.
      
      Note that OSN actually has its own unique sysfs attributes
      (qeth_osn_devtype), so the additional attributes shouldn't be created
      at all.
      For OSM, add a new qeth_l2_devtype that contains all the common
      and l2-specific sysfs attributes.
      When qeth_core_probe_device() does early setup for OSM or OSN, assign
      the corresponding devtype so that the ccwgroup probe code creates the
      full set of sysfs attributes.
      This allows us to skip qeth_l2_create_device_attributes() in case
      of an early setup.
      
      Any device that can't do early setup will initially have only the
      generic sysfs attributes, and when it's probed later
      qeth_l2_probe_device() adds the l2-specific attributes.
      
      If an early-setup device is removed (by calling ccwgroup_ungroup()),
      device_unregister() will - using the devtype - delete the
      l2-specific attributes before qeth_l2_remove_device() is called.
      So make sure to not remove them twice.
      
      What complicates the issue is that qeth_l2_probe_device() and
      qeth_l2_remove_device() is also called on a device when its
      layer2 attribute changes (ie. its layer mode is switched).
      For early-setup devices this wouldn't work properly - we wouldn't
      remove the l2-specific attributes when switching to L3.
      But switching the layer mode doesn't actually make any sense;
      we already decided that the device can only operate in L2!
      So just refuse to switch the layer mode on such devices. Note that
      OSN doesn't have a layer2 attribute, so we only need to special-case
      OSM.
      
      Based on an initial patch by Ursula Braun.
      
      Fixes: b4d72c08 ("qeth: bridgeport support - basic control")
      Signed-off-by: default avatarJulian Wiedmann <jwi@linux.vnet.ibm.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4c814829
    • Ursula Braun's avatar
      s390/qeth: handle sysfs error during initialization · 03effc4a
      Ursula Braun authored
      
      [ Upstream commit 9111e788 ]
      
      When setting up the device from within the layer discipline's
      probe routine, creating the layer-specific sysfs attributes can fail.
      Report this error back to the caller, and handle it by
      releasing the layer discipline.
      Signed-off-by: default avatarUrsula Braun <ubraun@linux.vnet.ibm.com>
      [jwi: updated commit msg, moved an OSN change to a subsequent patch]
      Signed-off-by: default avatarJulian Wiedmann <jwi@linux.vnet.ibm.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      03effc4a
    • Eric Dumazet's avatar
      dccp/tcp: do not inherit mc_list from parent · 4bb305d0
      Eric Dumazet authored
      
      [ Upstream commit 657831ff ]
      
      syzkaller found a way to trigger double frees from ip_mc_drop_socket()
      
      It turns out that leave a copy of parent mc_list at accept() time,
      which is very bad.
      
      Very similar to commit 8b485ce6 ("tcp: do not inherit
      fastopen_req from parent")
      
      Initial report from Pray3r, completed by Andrey one.
      Thanks a lot to them !
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarPray3r <pray3r.z@gmail.com>
      Reported-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Tested-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4bb305d0
    • Eric Dumazet's avatar
      netem: fix skb_orphan_partial() · 3aad7706
      Eric Dumazet authored
      commit f6ba8d33 upstream.
      
      I should have known that lowering skb->truesize was dangerous :/
      
      In case packets are not leaving the host via a standard Ethernet device,
      but looped back to local sockets, bad things can happen, as reported
      by Michael Madsen ( https://bugzilla.kernel.org/show_bug.cgi?id=195713 )
      
      So instead of tweaking skb->truesize, lets change skb->destructor
      and keep a reference on the owner socket via its sk_refcnt.
      
      Fixes: f2f872f9 ("netem: Introduce skb_orphan_partial() helper")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarMichael Madsen <mkm@nabto.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      3aad7706
    • Greg Kroah-Hartman's avatar
      Revert "stackprotector: Increase the per-task stack canary's random range from... · 2bc281eb
      Greg Kroah-Hartman authored
      Revert "stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms"
      
      This reverts commit 609a3e81 which is
      commit 5ea30e4e upstream.
      
      It shouldn't have been backported to 3.18, as we do not have
      get_random_long() in that kernel tree.
      Reported-by: default avatarPhilip Müller <philm@manjaro.org>
      Cc: Daniel Micay <danielmicay@gmail.com>
      Cc: Arjan van de Ven <arjan@linux.intel.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Arjan van Ven <arjan@linux.intel.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: kernel-hardening@lists.openwall.com
      Cc: Ingo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      
      2bc281eb