- 20 May, 2017 40 commits
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Andrey Ryabinin authored
commit 55635ba7 upstream. Patch series "Properly invalidate data in the cleancache", v2. We've noticed that after direct IO write, buffered read sometimes gets stale data which is coming from the cleancache. The reason for this is that some direct write hooks call call invalidate_inode_pages2[_range]() conditionally iff mapping->nrpages is not zero, so we may not invalidate data in the cleancache. Another odd thing is that we check only for ->nrpages and don't check for ->nrexceptional, but invalidate_inode_pages2[_range] also invalidates exceptional entries as well. So we invalidate exceptional entries only if ->nrpages != 0? This doesn't feel right. - Patch 1 fixes direct IO writes by removing ->nrpages check. - Patch 2 fixes similar case in invalidate_bdev(). Note: I only fixed conditional cleancache_invalidate_inode() here. Do we also need to add ->nrexceptional check in into invalidate_bdev()? - Patches 3-4: some optimizations. This patch (of 4): Some direct IO write fs hooks call invalidate_inode_pages2[_range]() conditionally iff mapping->nrpages is not zero. This can't be right, because invalidate_inode_pages2[_range]() also invalidate data in the cleancache via cleancache_invalidate_inode() call. So if page cache is empty but there is some data in the cleancache, buffered read after direct IO write would get stale data from the cleancache. Also it doesn't feel right to check only for ->nrpages because invalidate_inode_pages2[_range] invalidates exceptional entries as well. Fix this by calling invalidate_inode_pages2[_range]() regardless of nrpages state. Note: nfs,cifs,9p doesn't need similar fix because the never call cleancache_get_page() (nor directly, nor via mpage_readpage[s]()), so they are not affected by this bug. Fixes: c515e1fd ("mm/fs: add hooks to support cleancache") Link: http://lkml.kernel.org/r/20170424164135.22350-2-aryabinin@virtuozzo.comSigned-off-by:
Andrey Ryabinin <aryabinin@virtuozzo.com> Reviewed-by:
Jan Kara <jack@suse.cz> Acked-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Alexey Kuznetsov <kuznet@virtuozzo.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Luis Henriques authored
commit eeca958d upstream. The ceph_inode_xattr needs to be released when removing an xattr. Easily reproducible running the 'generic/020' test from xfstests or simply by doing: attr -s attr0 -V 0 /mnt/test && attr -r attr0 /mnt/test While there, also fix the error path. Here's the kmemleak splat: unreferenced object 0xffff88001f86fbc0 (size 64): comm "attr", pid 244, jiffies 4294904246 (age 98.464s) hex dump (first 32 bytes): 40 fa 86 1f 00 88 ff ff 80 32 38 1f 00 88 ff ff @........28..... 00 01 00 00 00 00 ad de 00 02 00 00 00 00 ad de ................ backtrace: [<ffffffff81560199>] kmemleak_alloc+0x49/0xa0 [<ffffffff810f3e5b>] kmem_cache_alloc+0x9b/0xf0 [<ffffffff812b157e>] __ceph_setxattr+0x17e/0x820 [<ffffffff812b1c57>] ceph_set_xattr_handler+0x37/0x40 [<ffffffff8111fb4b>] __vfs_removexattr+0x4b/0x60 [<ffffffff8111fd37>] vfs_removexattr+0x77/0xd0 [<ffffffff8111fdd1>] removexattr+0x41/0x60 [<ffffffff8111fe65>] path_removexattr+0x75/0xa0 [<ffffffff81120aeb>] SyS_lremovexattr+0xb/0x10 [<ffffffff81564b20>] entry_SYSCALL_64_fastpath+0x13/0x94 [<ffffffffffffffff>] 0xffffffffffffffff Signed-off-by:
Luis Henriques <lhenriques@suse.com> Reviewed-by:
"Yan, Zheng" <zyan@redhat.com> Signed-off-by:
Ilya Dryomov <idryomov@gmail.com> Signed-off-by:
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Michal Hocko authored
commit 81be3dee upstream. getxattr uses vmalloc to allocate memory if kzalloc fails. This is filled by vfs_getxattr and then copied to the userspace. vmalloc, however, doesn't zero out the memory so if the specific implementation of the xattr handler is sloppy we can theoretically expose a kernel memory. There is no real sign this is really the case but let's make sure this will not happen and use vzalloc instead. Fixes: 779302e6 ("fs/xattr.c:getxattr(): improve handling of allocation failures") Link: http://lkml.kernel.org/r/20170306103327.2766-1-mhocko@kernel.orgAcked-by:
Kees Cook <keescook@chromium.org> Reported-by:
Vlastimil Babka <vbabka@suse.cz> Signed-off-by:
Michal Hocko <mhocko@suse.com> Signed-off-by:
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Martin Brandenburg authored
commit 53950ef5 upstream. Let the server figure this out because our size might be out of date or not present. The bug was that xfs_io -f -t -c "pread -v 0 100" /mnt/foo echo "Test" > /mnt/foo xfs_io -f -t -c "pread -v 0 100" /mnt/foo fails because the second truncate did not happen if nothing had requested the size after the write in echo. Thus i_size was zero (not present) and the orangefs_setattr though i_size was zero and there was nothing to do. Signed-off-by:
Martin Brandenburg <martin@omnibond.com> Signed-off-by:
Mike Marshall <hubcap@omnibond.com> Signed-off-by:
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Martin Brandenburg authored
commit 17930b25 upstream. Since orangefs_lookup calls orangefs_iget which calls orangefs_inode_getattr, getattr_time will get set. Signed-off-by:
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Martin Brandenburg authored
commit e675c5ec upstream. Also don't check flags as this has been validated by the VFS already. Fix an off-by-one error in the max size checking. Stop logging just because userspace wants to write attributes which do not fit. This and the previous commit fix xfstests generic/020. Signed-off-by:
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Martin Brandenburg authored
commit a956af33 upstream. Signed-off-by:
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Eric Biggers authored
commit 7b4cc978 upstream. Currently the case of writing via mmap to a file with inline data is not handled. This is maybe a rare case since it requires a writable memory map of a very small file, but it is trivial to trigger with on inline_data filesystem, and it causes the 'BUG_ON(ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA));' in ext4_writepages() to be hit: mkfs.ext4 -O inline_data /dev/vdb mount /dev/vdb /mnt xfs_io -f /mnt/file \ -c 'pwrite 0 1' \ -c 'mmap -w 0 1m' \ -c 'mwrite 0 1' \ -c 'fsync' kernel BUG at fs/ext4/inode.c:2723! invalid opcode: 0000 [#1] SMP CPU: 1 PID: 2532 Comm: xfs_io Not tainted 4.11.0-rc1-xfstests-00301-g071d9acf3d1f #633 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-20170228_101828-anatol 04/01/2014 task: ffff88003d3a8040 task.stack: ffffc90000300000 RIP: 0010:ext4_writepages+0xc89/0xf8a RSP: 0018:ffffc90000303ca0 EFLAGS: 00010283 RAX: 0000028410000000 RBX: ffff8800383fa3b0 RCX: ffffffff812afcdc RDX: 00000a9d00000246 RSI: ffffffff81e660e0 RDI: 0000000000000246 RBP: ffffc90000303dc0 R08: 0000000000000002 R09: 869618e8f99b4fa5 R10: 00000000852287a2 R11: 00000000a03b49f4 R12: ffff88003808e698 R13: 0000000000000000 R14: 7fffffffffffffff R15: 7fffffffffffffff FS: 00007fd3e53094c0(0000) GS:ffff88003e400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd3e4c51000 CR3: 000000003d554000 CR4: 00000000003406e0 Call Trace: ? _raw_spin_unlock+0x27/0x2a ? kvm_clock_read+0x1e/0x20 do_writepages+0x23/0x2c ? do_writepages+0x23/0x2c __filemap_fdatawrite_range+0x80/0x87 filemap_write_and_wait_range+0x67/0x8c ext4_sync_file+0x20e/0x472 vfs_fsync_range+0x8e/0x9f ? syscall_trace_enter+0x25b/0x2d0 vfs_fsync+0x1c/0x1e do_fsync+0x31/0x4a SyS_fsync+0x10/0x14 do_syscall_64+0x69/0x131 entry_SYSCALL64_slow_path+0x25/0x25 We could try to be smart and keep the inline data in this case, or at least support delayed allocation when allocating the block, but these solutions would be more complicated and don't seem worthwhile given how rare this case seems to be. So just fix the bug by calling ext4_convert_inline_data() when we're asked to make a page writable, so that any inline data gets evicted, with the block allocated immediately. Reported-by:
Nick Alcock <nick.alcock@oracle.com> Reviewed-by:
Andreas Dilger <adilger@dilger.ca> Signed-off-by:
Eric Biggers <ebiggers@google.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
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Jan Kara authored
commit 5052b069 upstream. Commit b685d3d6 "block: treat REQ_FUA and REQ_PREFLUSH as synchronous" removed REQ_SYNC flag from WRITE_FUA implementation. Since JBD2 strips REQ_FUA and REQ_FLUSH flags from submitted IO when the filesystem is mounted with nobarrier mount option, journal superblock writes ended up being async writes after this patch and that caused heavy performance regression for dbench4 benchmark with high number of processes. In my test setup with HP RAID array with non-volatile write cache and 32 GB ram, dbench4 runs with 8 processes regressed by ~25%. Fix the problem by making sure journal superblock writes are always treated as synchronous since they generally block progress of the journalling machinery and thus the whole filesystem. Fixes: b685d3d6Signed-off-by:
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Christian Borntraeger authored
commit d9f8dfa9 upstream. Implement simple detection for all kind of jumps and branches. Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Cc: Andreas Krebbel <krebbel@linux.vnet.ibm.com> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-s390 <linux-s390@vger.kernel.org> Link: http://lkml.kernel.org/r/1491465112-45819-3-git-send-email-borntraeger@de.ibm.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
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Christian Borntraeger authored
commit e77852b3 upstream. since 4.10 perf annotate exits on s390 with an "unknown error -95". Turns out that commit 786c1b51 ("perf annotate: Start supporting cross arch annotation") added a hard requirement for architecture support when objdump is used but only provided x86 and arm support. Meanwhile power was added so lets add s390 as well. While at it make sure to implement the branch and jump types. Signed-off-by:
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Adrian Hunter authored
commit c3a0bbc7 upstream. Address filtering with kernel symbols incorrectly resulted in the error "Cannot determine size of symbol" because the no_size logic was the wrong way around. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Tested-by:
Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1490357752-27942-1-git-send-email-adrian.hunter@intel.comSigned-off-by:
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Mike Marciniszyn authored
commit b6eac931 upstream. The driver progress routines can call cond_resched() when a timeslice is exhausted and irqs are enabled. If the ULP had been holding a spin lock without disabling irqs and the post send directly called the progress routine, the cond_resched() could yield allowing another thread from the same ULP to deadlock on that same lock. Correct by replacing the current hfi1_do_send() calldown with a unique one for post send and adding an argument to hfi1_do_send() to indicate that the send engine is running in a thread. If the routine is not running in a thread, avoid calling cond_resched(). Fixes: Commit 831464ce ("IB/hfi1: Don't call cond_resched in atomic mode when sending packets") Reviewed-by:
Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by:
Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by:
Doug Ledford <dledford@redhat.com> Signed-off-by:
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Jack Morgenstein authored
commit fb7a9174 upstream. A warning message during SRIOV multicast cleanup should have actually been a debug level message. The condition generating the warning does no harm and can fill the message log. In some cases, during testing, some tests were so intense as to swamp the message log with these warning messages, causing a stall in the console message log output task. This stall caused an NMI to be sent to all CPUs (so that they all dumped their stacks into the message log). Aside from the message flood causing an NMI, the tests all passed. Once the message flood which caused the NMI is removed (by reducing the warning message to debug level), the NMI no longer occurs. Sample message log (console log) output illustrating the flood and resultant NMI (snippets with comments and modified with ... instead of hex digits, to satisfy checkpatch.pl): <mlx4_ib> _mlx4_ib_mcg_port_cleanup: ... WARNING: group refcount 1!!!... *** About 4000 almost identical lines in less than one second *** <mlx4_ib> _mlx4_ib_mcg_port_cleanup: ... WARNING: group refcount 1!!!... INFO: rcu_sched detected stalls on CPUs/tasks: { 17} (...) *** { 17} above indicates that CPU 17 was the one that stalled *** sending NMI to all CPUs: ... NMI backtrace for cpu 17 CPU: 17 PID: 45909 Comm: kworker/17:2 Hardware name: HP ProLiant DL360p Gen8, BIOS P71 09/08/2013 Workqueue: events fb_flashcursor task: ffff880478...... ti: ffff88064e...... task.ti: ffff88064e...... RIP: 0010:[ffffffff81......] [ffffffff81......] io_serial_in+0x15/0x20 RSP: 0018:ffff88064e257cb0 EFLAGS: 00000002 RAX: 0000000000...... RBX: ffffffff81...... RCX: 0000000000...... RDX: 0000000000...... RSI: 0000000000...... RDI: ffffffff81...... RBP: ffff88064e...... R08: ffffffff81...... R09: 0000000000...... R10: 0000000000...... R11: ffff88064e...... R12: 0000000000...... R13: 0000000000...... R14: ffffffff81...... R15: 0000000000...... FS: 0000000000......(0000) GS:ffff8804af......(0000) knlGS:000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080...... CR2: 00007f2a2f...... CR3: 0000000001...... CR4: 0000000000...... DR0: 0000000000...... DR1: 0000000000...... DR2: 0000000000...... DR3: 0000000000...... DR6: 00000000ff...... DR7: 0000000000...... Stack: ffff88064e...... ffffffff81...... ffffffff81...... 0000000000...... ffffffff81...... ffff88064e...... ffffffff81...... ffffffff81...... ffffffff81...... ffff88064e...... ffffffff81...... 0000000000...... Call Trace: [<ffffffff813d099b>] wait_for_xmitr+0x3b/0xa0 [<ffffffff813d0b5c>] serial8250_console_putchar+0x1c/0x30 [<ffffffff813d0b40>] ? serial8250_console_write+0x140/0x140 [<ffffffff813cb5fa>] uart_console_write+0x3a/0x80 [<ffffffff813d0aae>] serial8250_console_write+0xae/0x140 [<ffffffff8107c4d1>] call_console_drivers.constprop.15+0x91/0xf0 [<ffffffff8107d6cf>] console_unlock+0x3bf/0x400 [<ffffffff813503cd>] fb_flashcursor+0x5d/0x140 [<ffffffff81355c30>] ? bit_clear+0x120/0x120 [<ffffffff8109d5fb>] process_one_work+0x17b/0x470 [<ffffffff8109e3cb>] worker_thread+0x11b/0x400 [<ffffffff8109e2b0>] ? rescuer_thread+0x400/0x400 [<ffffffff810a5aef>] kthread+0xcf/0xe0 [<ffffffff810a5a20>] ? kthread_create_on_node+0x140/0x140 [<ffffffff81645858>] ret_from_fork+0x58/0x90 [<ffffffff810a5a20>] ? kthread_create_on_node+0x140/0x140 Code: 48 89 e5 d3 e6 48 63 f6 48 03 77 10 8b 06 5d c3 66 0f 1f 44 00 00 66 66 66 6 As indicated in the stack trace above, the console output task got swamped. Fixes: b9c5d6a6 ("IB/mlx4: Add multicast group (MCG) paravirtualization for SR-IOV") Signed-off-by:
Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by:
Leon Romanovsky <leon@kernel.org> Signed-off-by:
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Jack Morgenstein authored
commit 99e68909 upstream. In mlx4_ib_add, procedure mlx4_ib_alloc_eqs is called to allocate EQs. However, in the mlx4_ib_add error flow, procedure mlx4_ib_free_eqs is not called to free the allocated EQs. Fixes: e605b743 ("IB/mlx4: Increase the number of vectors (EQs) available for ULPs") Signed-off-by:
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Shamir Rabinovitch authored
commit 771a5258 upstream. When udev renames the netdev devices, ipoib debugfs entries does not get renamed. As a result, if subsequent probe of ipoib device reuse the name then creating a debugfs entry for the new device would fail. Also, moved ipoib_create_debug_files and ipoib_delete_debug_files as part of ipoib event handling in order to avoid any race condition between these. Fixes: 1732b0ef ([IPoIB] add path record information in debugfs) Signed-off-by:
Vijay Kumar <vijay.ac.kumar@oracle.com> Signed-off-by:
Shamir Rabinovitch <shamir.rabinovitch@oracle.com> Reviewed-by:
Mark Bloch <markb@mellanox.com> Signed-off-by:
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Michael J. Ruhl authored
commit 8561eae6 upstream. The Infiniband spec defines "A multicast address is defined by a MGID and a MLID" (section 10.5). Currently the MLID value is not validated. Add check to verify that the MLID value is in the correct address range. Fixes: 0c33aeed ("[IB] Add checks to multicast attach and detach") Reviewed-by:
Ira Weiny <ira.weiny@intel.com> Reviewed-by:
Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by:
Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
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Parav Pandit authored
commit 4be3a4fa upstream. This patch fixes the kernel crash that occurs during ib_dealloc_device() called due to provider driver fails with an error after ib_alloc_device() and before it can register using ib_register_device(). This crashed seen in tha lab as below which can occur with any IB device which fails to perform its device initialization before invoking ib_register_device(). This patch avoids touching cache and port immutable structures if device is not yet initialized. It also releases related memory when cache and port immutable data structure initialization fails during register_device() state. [81416.561946] BUG: unable to handle kernel NULL pointer dereference at (null) [81416.570340] IP: ib_cache_release_one+0x29/0x80 [ib_core] [81416.576222] PGD 78da66067 [81416.576223] PUD 7f2d7c067 [81416.579484] PMD 0 [81416.582720] [81416.587242] Oops: 0000 [#1] SMP [81416.722395] task: ffff8807887515c0 task.stack: ffffc900062c0000 [81416.729148] RIP: 0010:ib_cache_release_one+0x29/0x80 [ib_core] [81416.735793] RSP: 0018:ffffc900062c3a90 EFLAGS: 00010202 [81416.741823] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [81416.749785] RDX: 0000000000000000 RSI: 0000000000000282 RDI: ffff880859fec000 [81416.757757] RBP: ffffc900062c3aa0 R08: ffff8808536e5ac0 R09: ffff880859fec5b0 [81416.765708] R10: 00000000536e5c01 R11: ffff8808536e5ac0 R12: ffff880859fec000 [81416.773672] R13: 0000000000000000 R14: ffff8808536e5ac0 R15: ffff88084ebc0060 [81416.781621] FS: 00007fd879fab740(0000) GS:ffff88085fac0000(0000) knlGS:0000000000000000 [81416.790522] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [81416.797094] CR2: 0000000000000000 CR3: 00000007eb215000 CR4: 00000000003406e0 [81416.805051] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [81416.812997] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [81416.820950] Call Trace: [81416.824226] ib_device_release+0x1e/0x40 [ib_core] [81416.829858] device_release+0x32/0xa0 [81416.834370] kobject_cleanup+0x63/0x170 [81416.839058] kobject_put+0x25/0x50 [81416.843319] ib_dealloc_device+0x25/0x40 [ib_core] [81416.848986] mlx5_ib_add+0x163/0x1990 [mlx5_ib] [81416.854414] mlx5_add_device+0x5a/0x160 [mlx5_core] [81416.860191] mlx5_register_interface+0x8d/0xc0 [mlx5_core] [81416.866587] ? 0xffffffffa09e9000 [81416.870816] mlx5_ib_init+0x15/0x17 [mlx5_ib] [81416.876094] do_one_initcall+0x51/0x1b0 [81416.880861] ? __vunmap+0x85/0xd0 [81416.885113] ? kmem_cache_alloc_trace+0x14b/0x1b0 [81416.890768] ? vfree+0x2e/0x70 [81416.894762] do_init_module+0x60/0x1fa [81416.899441] load_module+0x15f6/0x1af0 [81416.904114] ? __symbol_put+0x60/0x60 [81416.908709] ? ima_post_read_file+0x3d/0x80 [81416.913828] ? security_kernel_post_read_file+0x6b/0x80 [81416.920006] SYSC_finit_module+0xa6/0xf0 [81416.924888] SyS_finit_module+0xe/0x10 [81416.929568] entry_SYSCALL_64_fastpath+0x1a/0xa9 [81416.935089] RIP: 0033:0x7fd879494949 [81416.939543] RSP: 002b:00007ffdbc1b4e58 EFLAGS: 00000202 ORIG_RAX: 0000000000000139 [81416.947982] RAX: ffffffffffffffda RBX: 0000000001b66f00 RCX: 00007fd879494949 [81416.955965] RDX: 0000000000000000 RSI: 000000000041a13c RDI: 0000000000000003 [81416.963926] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000001b652a0 [81416.971861] R10: 0000000000000003 R11: 0000000000000202 R12: 00007ffdbc1b3e70 [81416.979763] R13: 00007ffdbc1b3e50 R14: 0000000000000005 R15: 0000000000000000 [81417.008005] RIP: ib_cache_release_one+0x29/0x80 [ib_core] RSP: ffffc900062c3a90 [81417.016045] CR2: 0000000000000000 Fixes: 55aeed06 ("IB/core: Make ib_alloc_device init the kobject") Fixes: 7738613e ("IB/core: Add per port immutable struct to ib_device") Reviewed-by:
Daniel Jurgens <danielj@mellanox.com> Signed-off-by:
Parav Pandit <parav@mellanox.com> Signed-off-by:
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Jack Morgenstein authored
commit b312be3d upstream. The kernel commit cited below restructured ib device management so that the device kobject is initialized in ib_alloc_device. As part of the restructuring, the kobject is now initialized in procedure ib_alloc_device, and is later added to the device hierarchy in the ib_register_device call stack, in procedure ib_device_register_sysfs (which calls device_add). However, in the ib_device_register_sysfs error flow, if an error occurs following the call to device_add, the cleanup procedure device_unregister is called. This call results in the device object being deleted -- which results in various use-after-free crashes. The correct cleanup call is device_del -- which undoes device_add without deleting the device object. The device object will then (correctly) be deleted in the ib_register_device caller's error cleanup flow, when the caller invokes ib_dealloc_device. Fixes: 55aeed06 ("IB/core: Make ib_alloc_device init the kobject") Signed-off-by:
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Ding Tianhong authored
commit a6a59932 upstream. The patch 32786821 (make skb_copy_datagram_msg() et.al. preserve ->msg_iter on error) will revert the iov buffer if copy to iter failed, but it didn't copy any datagram if the skb_checksum_complete error, so no need to revert any data at this place. v2: Sabrina notice that return -EFAULT when checksum error is not correct here, it would confuse the caller about the return value, so fix it. Fixes: 32786821 ("make skb_copy_datagram_msg() et.al. preserve->msg_iter on error") Signed-off-by:
Ding Tianhong <dingtianhong@huawei.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by:
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Alex Williamson authored
commit 0cfef2b7 upstream. If the mmap_sem is contented then the vfio type1 IOMMU backend will defer locked page accounting updates to a workqueue task. This has a few problems and depending on which side the user tries to play, they might be over-penalized for unmaps that haven't yet been accounted or race the workqueue to enter more mappings than they're allowed. The original intent of this workqueue mechanism seems to be focused on reducing latency through the ioctl, but we cannot do so at the cost of correctness. Remove this workqueue mechanism and update the callers to allow for failure. We can also now recheck the limit under write lock to make sure we don't exceed it. vfio_pin_pages_remote() also now necessarily includes an unwind path which we can jump to directly if the consecutive page pinning finds that we're exceeding the user's memory limits. This avoids the current lazy approach which does accounting and mapping up to the fault, only to return an error on the next iteration to unwind the entire vfio_dma. Reviewed-by:
Peter Xu <peterx@redhat.com> Reviewed-by:
Kirti Wankhede <kwankhede@nvidia.com> Signed-off-by:
Alex Williamson <alex.williamson@redhat.com> Signed-off-by:
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Dennis Yang authored
commit 948f581a upstream. dm-thin does not free the discard_parent bio after all chained sub bios finished. The following kmemleak report could be observed after pool with discard_passdown option processes discard bios in linux v4.11-rc7. To fix this, we drop the discard_parent bio reference when its endio (passdown_endio) called. unreferenced object 0xffff8803d6b29700 (size 256): comm "kworker/u8:0", pid 30349, jiffies 4379504020 (age 143002.776s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 01 00 00 00 00 00 00 f0 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a5efd9>] kmemleak_alloc+0x49/0xa0 [<ffffffff8114ec34>] kmem_cache_alloc+0xb4/0x100 [<ffffffff8110eec0>] mempool_alloc_slab+0x10/0x20 [<ffffffff8110efa5>] mempool_alloc+0x55/0x150 [<ffffffff81374939>] bio_alloc_bioset+0xb9/0x260 [<ffffffffa018fd20>] process_prepared_discard_passdown_pt1+0x40/0x1c0 [dm_thin_pool] [<ffffffffa018b409>] break_up_discard_bio+0x1a9/0x200 [dm_thin_pool] [<ffffffffa018b484>] process_discard_cell_passdown+0x24/0x40 [dm_thin_pool] [<ffffffffa018b24d>] process_discard_bio+0xdd/0xf0 [dm_thin_pool] [<ffffffffa018ecf6>] do_worker+0xa76/0xd50 [dm_thin_pool] [<ffffffff81086239>] process_one_work+0x139/0x370 [<ffffffff810867b1>] worker_thread+0x61/0x450 [<ffffffff8108b316>] kthread+0xd6/0xf0 [<ffffffff81a6cd1f>] ret_from_fork+0x3f/0x70 [<ffffffffffffffff>] 0xffffffffffffffff Signed-off-by:
Dennis Yang <dennisyang@qnap.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Bart Van Assche authored
commit 23a60124 upstream. Otherwise the request-based DM blk-mq request_queue will be put into service without being properly exported via sysfs. Signed-off-by:
Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by:
Hannes Reinecke <hare@suse.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
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Somasundaram Krishnasamy authored
commit 117aceb0 upstream. When committing era metadata to disk, it doesn't always save the latest spacemap metadata root in superblock. Due to this, metadata is getting corrupted sometimes when reopening the device. The correct order of update should be, pre-commit (shadows spacemap root), save the spacemap root (newly shadowed block) to in-core superblock and then the final commit. Signed-off-by:
Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Signed-off-by:
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Ondrej Kozina authored
commit c82feeec upstream. The message "key wipe" used to wipe real key stored in crypto layer by rewriting it with zeroes. Since commit 28856a9e ("crypto: xts - consolidate sanity check for keys") this no longer works in FIPS mode for XTS. While running in FIPS mode the crypto key part has to differ from the tweak key. Fixes: 28856a9e ("crypto: xts - consolidate sanity check for keys") Signed-off-by:
Ondrej Kozina <okozina@redhat.com> Signed-off-by:
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Gary R Hook authored
commit 6263b51e upstream. The CCP has the ability to perform several operations simultaneously, but only one interrupt. When implemented as a PCI device and using MSI-X/MSI interrupts, use a tasklet model to service interrupts. By disabling and enabling interrupts from the CCP, coupled with the queuing that tasklets provide, we can ensure that all events (occurring on the device) are recognized and serviced. This change fixes a problem wherein 2 or more busy queues can cause notification bits to change state while a (CCP) interrupt is being serviced, but after the queue state has been evaluated. This results in the event being 'lost' and the queue hanging, waiting to be serviced. Since the status bits are never fully de-asserted, the CCP never generates another interrupt (all bits zero -> one or more bits one), and no further CCP operations will be executed. Signed-off-by:
Gary R Hook <gary.hook@amd.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Gary R Hook authored
commit 7b537b24 upstream. The CCP has the ability to perform several operations simultaneously, but only one interrupt. When implemented as a PCI device and using MSI-X/MSI interrupts, use a tasklet model to service interrupts. By disabling and enabling interrupts from the CCP, coupled with the queuing that tasklets provide, we can ensure that all events (occurring on the device) are recognized and serviced. This change fixes a problem wherein 2 or more busy queues can cause notification bits to change state while a (CCP) interrupt is being serviced, but after the queue state has been evaluated. This results in the event being 'lost' and the queue hanging, waiting to be serviced. Since the status bits are never fully de-asserted, the CCP never generates another interrupt (all bits zero -> one or more bits one), and no further CCP operations will be executed. Signed-off-by:
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Gary R Hook authored
commit 116591fe upstream. Ensure that we disable interrupts first when shutting down the driver. Signed-off-by:
Gary R Hook <ghook@amd.com> Signed-off-by:
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Gary R Hook authored
commit 56467cb1 upstream. Each CCP queue can product interrupts for 4 conditions: operation complete, queue empty, error, and queue stopped. This driver only works with completion and error events. Signed-off-by:
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Stephan Mueller authored
commit 2a2a251f upstream. Some cipher implementations will crash if you try to use them without calling setkey first. This patch adds a check so that the accept(2) call will fail with -ENOKEY if setkey hasn't been done on the socket yet. Fixes: 400c40cf ("crypto: algif - add AEAD support") Signed-off-by:
Stephan Mueller <smueller@chronox.de> Signed-off-by:
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Krzysztof Kozlowski authored
commit 42d5c176 upstream. Driver is capable of handling only one request at a time and it stores it in its state container struct s5p_aes_dev. This stored request must be protected between concurrent invocations (e.g. completing current request and scheduling new one). Combination of lock and "busy" field is used for that purpose. When "busy" field is true, the driver will not accept new request thus it will not overwrite currently handled data. However commit 28b62b14 ("crypto: s5p-sss - Fix spinlock recursion on LRW(AES)") moved some of the write to "busy" field out of a lock protected critical section. This might lead to potential race between completing current request and scheduling a new one. Effectively the request completion might try to operate on new crypto request. Fixes: 28b62b14 ("crypto: s5p-sss - Fix spinlock recursion on LRW(AES)") Signed-off-by:
Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by:
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by:
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Mike Snitzer authored
commit 2859323e upstream. When registering an integrity profile: if the template's interval_exp is not 0 use it, otherwise use the ilog2() of logical block size of the provided gendisk. This fixes a long-standing DM linear target bug where it cannot pass integrity data to the underlying device if its logical block size conflicts with the underlying device's logical block size. Reported-by:
Mikulas Patocka <mpatocka@redhat.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
Jens Axboe <axboe@fb.com> Signed-off-by:
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Marc Zyngier authored
commit c667186f upstream. Our 32bit CP14/15 handling inherited some of the ARMv7 code for handling the trapped system registers, completely missing the fact that the fields for Rt and Rt2 are now 5 bit wide, and not 4... Let's fix it, and provide an accessor for the most common Rt case. Reviewed-by:
Christoffer Dall <cdall@linaro.org> Signed-off-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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Andrew Jones authored
commit 6c7a5dce upstream. Fix potential races in kvm_psci_vcpu_on() by taking the kvm->lock mutex. In general, it's a bad idea to allow more than one PSCI_CPU_ON to process the same target VCPU at the same time. One such problem that may arise is that one PSCI_CPU_ON could be resetting the target vcpu, which fills the entire sys_regs array with a temporary value including the MPIDR register, while another looks up the VCPU based on the MPIDR value, resulting in no target VCPU found. Resolves both races found with the kvm-unit-tests/arm/psci unit test. Reviewed-by:
Levente Kurusa <lkurusa@redhat.com> Suggested-by:
Andrew Jones <drjones@redhat.com> Signed-off-by:
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Paolo Bonzini authored
commit 4e335d9e upstream. This reverts commit bbd64115. I've been sitting on this revert for too long and it unfortunately missed 4.11. It's also the reason why I haven't merged ring-based dirty tracking for 4.12. Using kvm_vcpu_memslots in kvm_gfn_to_hva_cache_init and kvm_vcpu_write_guest_offset_cached means that the MSR value can now be used to access SMRAM, simply by making it point to an SMRAM physical address. This is problematic because it lets the guest OS overwrite memory that it shouldn't be able to touch. Fixes: bbd64115Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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David Hildenbrand authored
commit 28bf2888 upstream. If we already entered/are about to enter SMM, don't allow switching to INIT/SIPI_RECEIVED, otherwise the next call to kvm_apic_accept_events() will report a warning. Same applies if we are already in MP state INIT_RECEIVED and SMM is requested to be turned on. Refuse to set the VCPU events in this case. Fixes: cd7764fe ("KVM: x86: latch INITs while in system management mode") Reported-by:
Dmitry Vyukov <dvyukov@google.com> Signed-off-by:
David Hildenbrand <david@redhat.com> Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
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Vince Weaver authored
commit 33b88e70 upstream. It appears as though the Broadwell-EP DRAM units share the special units quirk with Haswell-EP/KNL. Without this patch, you get really high results (a single DRAM using 20W of power). The powercap driver in drivers/powercap/intel_rapl.c already has this change. Signed-off-by:
Vince Weaver <vincent.weaver@maine.edu> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@gmail.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Richard Weinberger authored
commit 9abc74a2 upstream. This is broken since ever but sadly nobody noticed. Recent versions of GDB set DR_CONTROL unconditionally and UML dies due to a heap corruption. It turns out that the PTRACE_POKEUSER was copy&pasted from i386 and assumes that addresses are 4 bytes long. Fix that by using 8 as address size in the calculation. Reported-by:
jie cao <cj3054@gmail.com> Signed-off-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
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Ben Hutchings authored
commit 8376efd3 upstream. Commit 11e63f6d added cache flushing for unaligned writes from an iovec, covering the first and last cache line of a >= 8 byte write and the first cache line of a < 8 byte write. But an unaligned write of 2-7 bytes can still cover two cache lines, so make sure we flush both in that case. Fixes: 11e63f6d ("x86, pmem: fix broken __copy_user_nocache ...") Signed-off-by:
Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by:
Dan Williams <dan.j.williams@intel.com> Signed-off-by:
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Andy Lutomirski authored
commit 65973dd3 upstream. i386 glibc is buggy and calls the sigaction syscall incorrectly. This is asymptomatic for normal programs, but it blows up on programs that do evil things with segmentation. The ldt_gdt self-test is an example of such an evil program. This doesn't appear to be a regression -- I think I just got lucky with the uninitialized memory that glibc threw at the kernel when I wrote the test. This hackish fix manually issues sigaction(2) syscalls to undo the damage. Without the fix, ldt_gdt_32 segfaults; with the fix, it passes for me. See: https://sourceware.org/bugzilla/show_bug.cgi?id=21269Signed-off-by:
Andy Lutomirski <luto@kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Garnier <thgarnie@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/aaab0f9f93c9af25396f01232608c163a760a668.1490218061.git.luto@kernel.orgSigned-off-by:
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