- 17 Aug, 2015 19 commits
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Brian King authored
commit 3f1c0581 upstream. Fixes another signed / unsigned array indexing bug in the ipr driver. Currently, when hrrq_index wraps, it becomes a negative number. We do the modulo, but still have a negative number, so we end up indexing backwards in the array. Given where the hrrq array is located in memory, we probably won't actually reference memory we don't own, but nonetheless ipr is still looking at data within struct ipr_ioa_cfg and interpreting it as struct ipr_hrr_queue data, so bad things could certainly happen. Each ipr adapter has anywhere from 1 to 16 HRRQs. By default, we use 2 on new adapters. Let's take an example: Assume ioa_cfg->hrrq_index=0x7fffffffe and ioa_cfg->hrrq_num=4: The atomic_add_return will then return -1. We mod this with 3 and get -2, add one and get -1 for an array index. On adapters which support more than a single HRRQ, we dedicate HRRQ to adapter initialization and error interrupts so that we can optimize the other queues for fast path I/O. So all normal I/O uses HRRQ 1-15. So we want to spread the I/O requests across those HRRQs. With the default module parameter settings, this bug won't hit, only when someone sets the ipr.number_of_msix parameter to a value larger than 3 is when bad things start to happen. Tested-by:
Wen Xiong <wenxiong@linux.vnet.ibm.com> Reviewed-by:
Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Signed-off-by:
Brian King <brking@linux.vnet.ibm.com> Reviewed-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
James Bottomley <JBottomley@Odin.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Brian King authored
commit bb7c5433 upstream. When ipr's internal driver trace was changed to an atomic, a signed/unsigned bug slipped in which results in us indexing backwards in our memory buffer writing on memory that does not belong to us. This patch fixes this by removing the modulo and instead just mask off the low bits. Tested-by:
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Brian King authored
commit 36b8e180 upstream. Make sure we have the host lock held when calling scsi_report_bus_reset. Fixes a crash seen as the __devices list in the scsi host was changing as we were iterating through it. Reviewed-by:
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Daniel Vetter authored
commit 42639ba5 upstream. Apparently been in there since forever and fairly easy to hit when hotplugging really fast. I can do that since my mst hub has a manual button to flick the hpd line for reprobing. The resulting WARNING spam isn't pretty. Cc: Dave Airlie <airlied@gmail.com> Reviewed-by:
Thierry Reding <treding@nvidia.com> Reviewed-by:
Ander Conselvan de Oliveira <conselvan2@gmail.com> Signed-off-by:
Daniel Vetter <daniel.vetter@intel.com> Signed-off-by:
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Alex Deucher authored
commit 0a90a0cf upstream. Fixes a broken hsync start value uncovered by: abc0b144 (drm: Perform basic sanity checks on probed modes) The driver handled the bad hsync start elsewhere, but the above commit prevented it from getting added. bug: https://bugs.freedesktop.org/show_bug.cgi?id=91401Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Alex Deucher authored
commit d0ea397e upstream. 1. Always assign audio function pointers even if the display does not support audio. We need to properly disable the audio stream when when using a non-audio capable monitor. Fixes purple line on some hdmi monitors. 2. Check if a pin is in use by another encoder before disabling it. v2: make sure we've fetched the edid before checking audio and look up the encoder before calling audio_detect since connector->encoder may not be assigned yet. Separate pin and afmt. They are allocated at different times and have no dependency on eachother. v3: fix connector fetching in encoder functions v4: fix missed dig->pin check in dce6_afmt_write_latency_fields bugs: https://bugzilla.kernel.org/show_bug.cgi?id=93701 https://bugzilla.redhat.com/show_bug.cgi?id=1236337 https://bugs.freedesktop.org/show_bug.cgi?id=91041Signed-off-by:
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Chris Wilson authored
commit ee0a227b upstream. Since we may conceivably encounter situations where the upper part of the 64bit register changes between reads, for example when a timestamp counter overflows, change the WARN into a retry loop. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Michał Winiarski <michal.winiarski@intel.com> Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
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Chris Wilson authored
commit 5eb3e5a5 upstream. The old style of memory interleaving swizzled upto the end of the first even bank of memory, and then used the remainder as unswizzled on the unpaired bank - i.e. swizzling is not constant for all memory. This causes problems when we try to migrate memory and so the kernel prevents migration at all when we detect L-shaped inconsistent swizzling. However, this issue also extends to userspace who try to manually detile into memory as the swizzling for an individual page is unknown (it depends on its physical address only known to the kernel), userspace cannot correctly swizzle. Note that this is a new attempt for the previously merged one, reverted in commit d82c0ba6 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Tue Jul 14 12:29:27 2015 +0200 Revert "drm/i915: Declare the swizzling unknown for L-shaped configurations" This is cc: stable since we need it to fix up troubles with wc cpu mmaps that userspace recently started to use widely. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91105Signed-off-by:
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Jan Kara authored
commit 8f2f3eb5 upstream. fsnotify_clear_marks_by_group_flags() can race with fsnotify_destroy_marks() so that when fsnotify_destroy_mark_locked() drops mark_mutex, a mark from the list iterated by fsnotify_clear_marks_by_group_flags() can be freed and thus the next entry pointer we have cached may become stale and we dereference free memory. Fix the problem by first moving marks to free to a special private list and then always free the first entry in the special list. This method is safe even when entries from the list can disappear once we drop the lock. Signed-off-by:
Jan Kara <jack@suse.com> Reported-by:
Ashish Sangwan <a.sangwan@samsung.com> Reviewed-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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David Daney authored
commit 46011e6e upstream. On MIPS the GLOBAL bit of the PTE must have the same value in any aligned pair of PTEs. These pairs of PTEs are referred to as "buddies". In a SMP system is is possible for two CPUs to be calling set_pte() on adjacent PTEs at the same time. There is a race between setting the PTE and a different CPU setting the GLOBAL bit in its buddy PTE. This race can be observed when multiple CPUs are executing vmap()/vfree() at the same time. Make setting the buddy PTE's GLOBAL bit an atomic operation to close the race condition. The case of CONFIG_64BIT_PHYS_ADDR && CONFIG_CPU_MIPS32 is *not* handled. Signed-off-by:
David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10835/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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James Hogan authored
commit 3aff47c0 upstream. When EVA is enabled, flush the Return Prediction Stack (RPS) present on some MIPS cores on entry to the kernel from user mode. This is important specifically for interAptiv with EVA enabled, otherwise kernel mode RPS mispredicts may trigger speculative fetches of user return addresses, which may be sensitive in the kernel address space due to EVA's overlapping user/kernel address spaces. Signed-off-by:
James Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10812/Signed-off-by:
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Florian Fainelli authored
commit 247bfb65 upstream. This reverts commit 3cf29543 ("MIPS: BCM63xx: Provide a plat_post_dma_flush hook") since this commit was found to prevent BCM6358 (early BMIPS4350 cores) and some BCM6368 (BMIPS4380 cores) from booting reliably. Alvaro was able to track this down to an issue specifically located to devices that use the second thread (TP1) when booting. Since BCM63xx did not have a need for plat_post_dma_flush() hook before, let's just keep things the way they were. Reported-by:
Álvaro Fernández Rojas <noltari@gmail.com> Reported-by:
Jonas Gorski <jogo@openwrt.org> Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Nicolas Schichan <nschichan@freebox.fr> Cc: linux-mips@linux-mips.org Cc: blogic@openwrt.org Cc: noltari@gmail.com Cc: jogo@openwrt.org Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/10804/Signed-off-by:
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James Hogan authored
commit 1e77863a upstream. The show_stack() function deals exclusively with kernel contexts, but if it gets called in user context with EVA enabled, show_stacktrace() will attempt to access the stack using EVA accesses, which will either read other user mapped data, or more likely cause an exception which will be handled by __get_user(). This is easily reproduced using SysRq t to show all task states, which results in the following stack dump output: Stack : (Bad stack address) Fix by setting the current user access mode to kernel around the call to show_stacktrace(). This causes __get_user() to use normal loads to read the kernel stack. Now we get the correct output, like this: Stack : 00000000 80168960 00000000 004a0000 00000000 00000000 8060016c 1f3abd0c 1f172cd8 8056f09c 7ff1e450 8014fc3c 00000001 806dd0b0 0000001d 00000002 1f17c6a0 1f17c804 1f17c6a0 8066f6e0 00000000 0000000a 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0110e800 1f3abd6c 1f17c6a0 ... Signed-off-by:
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James Hogan authored
commit 55c723e1 upstream. If a machine check exception is raised in kernel mode, user context, with EVA enabled, then the do_mcheck handler will attempt to read the code around the EPC using EVA load instructions, i.e. as if the reads were from user mode. This will either read random user data if the process has anything mapped at the same address, or it will cause an exception which is handled by __get_user, resulting in this output: Code: (Bad address in epc) Fix by setting the current user access mode to kernel if the saved register context indicates the exception was taken in kernel mode. This causes __get_user to use normal loads to read the kernel code. Signed-off-by:
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Felix Fietkau authored
commit 0cb0985f upstream. get_c0_perfcount_int is tested from oprofile code. If oprofile is compiled as module, get_c0_perfcount_int needs to be exported, otherwise it cannot be resolved. Fixes: a669efc4 ("MIPS: Add hook to get C0 performance counter interrupt") Signed-off-by:
Felix Fietkau <nbd@openwrt.org> Cc: linux-mips@linux-mips.org Cc: abrestic@chromium.org Patchwork: https://patchwork.linux-mips.org/patch/10763/Signed-off-by:
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Felix Fietkau authored
commit 1d62d737 upstream. p->thread.user_cpus_allowed is zero-initialized and is only filled on the first sched_setaffinity call. To avoid adding overhead in the task initialization codepath, simply OR the returned mask in sched_getaffinity with p->cpus_allowed. Signed-off-by:
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James Hogan authored
commit 106eccb4 upstream. On Malta, since commit a87ea88d ("MIPS: Malta: initialise the RTC at boot"), the RTC is reinitialised and forced into binary coded decimal (BCD) mode during init, even if the bootloader has already initialised it, and may even have already put it into binary mode (as YAMON does). This corrupts the current time, can result in the RTC seconds being an invalid BCD (e.g. 0x1a..0x1f) for up to 6 seconds, as well as confusing YAMON for a while after reset, enough for it to report timeouts when attempting to load from TFTP (it actually uses the RTC in that code). Therefore only initialise the RTC to the extent that is necessary so that Linux avoids interfering with the bootloader setup, while also allowing it to estimate the CPU frequency without hanging, without a bootloader necessarily having done anything with the RTC (for example when the kernel is loaded via EJTAG). The divider control is configured for a 32KHZ reference clock if necessary, and the SET bit of the RTC_CONTROL register is cleared if necessary without changing any other bits (this bit will be set when coming out of reset if the battery has been disconnected). Fixes: a87ea88d ("MIPS: Malta: initialise the RTC at boot") Signed-off-by:
Paul Burton <paul.burton@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10739/Signed-off-by:
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James Cowgill authored
commit a4504755 upstream. Fixes the assembler errors generated when compiling a MIPS R6 kernel with CONFIG_KEXEC on, by replacing the offending add and sub instructions with addiu instructions. Build errors: arch/mips/kernel/relocate_kernel.S: Assembler messages: arch/mips/kernel/relocate_kernel.S:27: Error: invalid operands `dadd $16,$16,8' arch/mips/kernel/relocate_kernel.S:64: Error: invalid operands `dadd $20,$20,8' arch/mips/kernel/relocate_kernel.S:65: Error: invalid operands `dadd $18,$18,8' arch/mips/kernel/relocate_kernel.S:66: Error: invalid operands `dsub $22,$22,1' scripts/Makefile.build:294: recipe for target 'arch/mips/kernel/relocate_kernel.o' failed Signed-off-by:
James Cowgill <James.Cowgill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10558/Signed-off-by:
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James Cowgill authored
commit 531a6d59 upstream. Commit eeb53895 ("MIPS: unaligned: Prevent EVA instructions on kernel unaligned accesses") renamed the Load* and Store* defines in unaligned.c to _Load* and _Store* as part of its fix. One define was missed out which causes big endian R6 kernels to fail to build. arch/mips/kernel/unaligned.c:880:35: error: implicit declaration of function '_StoreDW' #define StoreDW(addr, value, res) _StoreDW(addr, value, res) ^ Signed-off-by:
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- 10 Aug, 2015 21 commits
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Greg Kroah-Hartman authored
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Arnaldo Carvalho de Melo authored
commit 0bc2f2f7 upstream. When setting yup the symbols library we setup several filter lists, for dsos, comms, symbols, etc, and there is code that, if there are filters, do certain operations, like recalculate the number of non filtered histogram entries in the top/report TUI. But they were considering just the "Zoom" filters, when they need to take into account as well the above mentioned filters (perf top --comms, --dsos, etc). So store in symbol_conf.has_filter true if any of those filters is in place. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-f5edfmhq69vfvs1kmikq1wep@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andre Tomt <lkml@tomt.net> Signed-off-by:
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Dave Chinner authored
commit df150ed1 upstream. We don't log remote attribute contents, and instead write them synchronously before we commit the block allocation and attribute tree update transaction. As a result we are writing to the allocated space before the allcoation has been made permanent. As a result, we cannot consider this allocation to be a metadata allocation. Metadata allocation can take blocks from the free list and so reuse them before the transaction that freed the block is committed to disk. This behaviour is perfectly fine for journalled metadata changes as log recovery will ensure the free operation is replayed before the overwrite, but for remote attribute writes this is not the case. Hence we have to consider the remote attribute blocks to contain data and allocate accordingly. We do this by dropping the XFS_BMAPI_METADATA flag from the block allocation. This means the allocation will not use blocks that are on the busy list without first ensuring that the freeing transaction has been committed to disk and the blocks removed from the busy list. This ensures we will never overwrite a freed block without first ensuring that it is really free. Signed-off-by:
Dave Chinner <dchinner@redhat.com> Reviewed-by:
Brian Foster <bfoster@redhat.com> Signed-off-by:
Dave Chinner <david@fromorbit.com> Signed-off-by:
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Dave Chinner authored
commit e3c32ee9 upstream. In recent testing, a system that crashed failed log recovery on restart with a bad symlink buffer magic number: XFS (vda): Starting recovery (logdev: internal) XFS (vda): Bad symlink block magic! XFS: Assertion failed: 0, file: fs/xfs/xfs_log_recover.c, line: 2060 On examination of the log via xfs_logprint, none of the symlink buffers in the log had a bad magic number, nor were any other types of buffer log format headers mis-identified as symlink buffers. Tracing was used to find the buffer the kernel was tripping over, and xfs_db identified it's contents as: 000: 5841524d 00000000 00000346 64d82b48 8983e692 d71e4680 a5f49e2c b317576e 020: 00000000 00602038 00000000 006034ce d0020000 00000000 4d4d4d4d 4d4d4d4d 040: 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 060: 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d 4d4d4d4d ..... This is a remote attribute buffer, which are notable in that they are not logged but are instead written synchronously by the remote attribute code so that they exist on disk before the attribute transactions are committed to the journal. The above remote attribute block has an invalid LSN in it - cycle 0xd002000, block 0 - which means when log recovery comes along to determine if the transaction that writes to the underlying block should be replayed, it sees a block that has a future LSN and so does not replay the buffer data in the transaction. Instead, it validates the buffer magic number and attaches the buffer verifier to it. It is this buffer magic number check that is failing in the above assert, indicating that we skipped replay due to the LSN of the underlying buffer. The problem here is that the remote attribute buffers cannot have a valid LSN placed into them, because the transaction that contains the attribute tree pointer changes and the block allocation that the attribute data is being written to hasn't yet been committed. Hence the LSN field in the attribute block is completely unwritten, thereby leaving the underlying contents of the block in the LSN field. It could have any value, and hence a future overwrite of the block by log recovery may or may not work correctly. Fix this by always writing an invalid LSN to the remote attribute block, as any buffer in log recovery that needs to write over the remote attribute should occur. We are protected from having old data written over the attribute by the fact that freeing the block before the remote attribute is written will result in the buffer being marked stale in the log and so all changes prior to the buffer stale transaction will be cancelled by log recovery. Hence it is safe to ignore the LSN in the case or synchronously written, unlogged metadata such as remote attribute blocks, and to ensure we do that correctly, we need to write an invalid LSN to all remote attribute blocks to trigger immediate recovery of metadata that is written over the top. As a further protection for filesystems that may already have remote attribute blocks with bad LSNs on disk, change the log recovery code to always trigger immediate recovery of metadata over remote attribute blocks. Signed-off-by:
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Kamil Dudka authored
commit 7512223b upstream. This fixes the list_del corruption reported at <https://bugzilla.redhat.com/1205985>. Signed-off-by:
Kamil Dudka <kdudka@redhat.com> Signed-off-by:
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Kamil Dudka authored
commit ac8c7930 upstream. This was the only access to cli->abi16 without holding the mutex. Signed-off-by:
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Ben Skeggs authored
commit 697bb728 upstream. Userspace has started doing this, which upsets the display class hw error checking in various unpleasant ways. Signed-off-by:
Ben Skeggs <bskeggs@redhat.com> Signed-off-by:
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Ilia Mirkin authored
commit d108142c upstream. The RING_SPACE macro accounts how much space is used up so it's important to ask it for the right amount. Incorrect accounting of this can cause page faults down the line as writes are attempted outside of the ring. Signed-off-by:
Ilia Mirkin <imirkin@alum.mit.edu> Signed-off-by:
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Roland Dreier authored
commit b2032fd5 upstream. To fix some issues talking to ESX, this patch modifies the qla2xxx driver so that it never logs into remote ports. This has the side effect of getting rid of the "rports" entirely, which means we never log out of initiators and never tear down sessions when an initiator goes away. This is mostly OK, except that we can run into trouble if we have initiator A assigned FC address X:Y:Z by the fabric talking to us, and then initiator A goes away. Some time (could be a long time) later, initiator B comes along and also gets FC address X:Y:Z (which is available again, because initiator A is gone). If initiator B starts talking to us, then we'll still have the session for initiator A, and since we look up incoming IO based on the FC address X:Y:Z, initiator B will end up using ACLs for initiator A. Fix this by: 1. Handling RSCN events somewhat differently; instead of completely skipping the processing of fcports, we look through the list, and if an fcport disappears, we tell the target code the tear down the session and tell the HBA FW to release the N_Port handle. 2. Handling "port down" events by flushing all of our sessions. The firmware was already releasing the N_Port handle but we want the target code to drop all the sessions too. Signed-off-by:
Roland Dreier <roland@purestorage.com> Signed-off-by:
Alexei Potashnik <alexei@purestorage.com> Acked-by:
Quinn Tran <quinn.tran@qlogic.com> Signed-off-by:
Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by:
Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by:
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Kanoj Sarcar authored
commit 9fce1254 upstream. Signed-off-by:
Kanoj Sarcar <kanoj.sarcar@qlogic.com> Signed-off-by:
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Himanshu Madhani authored
commit 6bc85dd5 upstream. Remove unnecessary msleep from qlt_send_term_exchange as it adds latency of 250 msec while sending terminate exchange to an aborted task. Signed-off-by:
Giridhar Malavali <giridhar.malavali@qlogic.com> Reviewed-by:
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Quinn Tran authored
commit 810e30bc upstream. Request IOCB queue element(s) is reserved during good path IO. Under error condition such as unable to allocate IOCB handle condition, the IOCB count that was reserved is not released. Signed-off-by:
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Saurav Kashyap authored
commit ba9f6f64 upstream. [ Upstream commit ef86cb20 ] This patch fixes a kernel panic for qla2xxx Target core Module driver introduced by a fix in the qla2xxx initiator code. Commit ef86cb20 ("qla2xxx: Mark port lost when we receive an RSCN for it.") introduced the regression for qla2xxx Target driver. Stack trace will have following signature --- <NMI exception stack> --- [ffff88081faa3cc8] _raw_spin_lock_irqsave at ffffffff815b1f03 [ffff88081faa3cd0] qlt_fc_port_deleted at ffffffffa096ccd0 [qla2xxx] [ffff88081faa3d20] qla2x00_schedule_rport_del at ffffffffa0913831[qla2xxx] [ffff88081faa3d50] qla2x00_mark_device_lost at ffffffffa09159c5[qla2xxx] [ffff88081faa3db0] qla2x00_async_event at ffffffffa0938d59 [qla2xxx] [ffff88081faa3e30] qla24xx_msix_default at ffffffffa093a326 [qla2xxx] [ffff88081faa3e90] handle_irq_event_percpu at ffffffff810a7b8d [ffff88081faa3ee0] handle_irq_event at ffffffff810a7d32 [ffff88081faa3f10] handle_edge_irq at ffffffff810ab6b9 [ffff88081faa3f30] handle_irq at ffffffff8100619c [ffff88081faa3f70] do_IRQ at ffffffff815b4b1c --- <IRQ stack> --- Signed-off-by:
Saurav Kashyap <saurav.kashyap@qlogic.com> Signed-off-by:
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Lukasz Anaczkowski authored
commit 69cefc27 upstream. Scaling for Knights Landing is same as the default scaling (100000). When Knigts Landing support was added to the pstate driver, this parameter was omitted resulting in a kernel panic during boot. Fixes: b34ef932 (intel_pstate: Knights Landing support) Reported-by:
Yasuaki Ishimatsu <yishimat@redhat.com> Signed-off-by:
Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by:
Lukasz Anaczkowski <lukasz.anaczkowski@intel.com> Acked-by:
Kristen Carlson Accardi <kristen@linux.intel.com> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Nicholas Bellinger authored
commit 007d038b upstream. This patch fixes a regression introduced with the following commit in v4.0-rc1 code, where an explicit iser-target logout would result in ->tx_thread_active being incorrectly cleared by the logout post handler, and subsequent TX kthread leak: commit 88dcd2da Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Thu Feb 26 22:19:15 2015 -0800 iscsi-target: Convert iscsi_thread_set usage to kthread.h To address this bug, change iscsit_logout_post_handler_closesession() and iscsit_logout_post_handler_samecid() to only cmpxchg() on ->tx_thread_active for traditional iscsi/tcp connections. This is required because iscsi/tcp connections are invoking logout post handler logic directly from TX kthread context, while iser connections are invoking logout post handler logic from a seperate workqueue context. Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by:
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Nicholas Bellinger authored
commit e5419865 upstream. This patch fixes a regression introduced with the following commit in v4.0-rc1 code, where a iscsit_start_kthreads() failure triggers a NULL pointer dereference OOPs: commit 88dcd2da Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Thu Feb 26 22:19:15 2015 -0800 iscsi-target: Convert iscsi_thread_set usage to kthread.h To address this bug, move iscsit_start_kthreads() immediately preceeding the transmit of last login response, before signaling a successful transition into full-feature-phase within existing iscsi_target_do_tx_login_io() logic. This ensures that no target-side resource allocation failures can occur after the final login response has been successfully sent. Also, it adds a iscsi_conn->rx_login_comp to allow the RX thread to sleep to prevent other socket related failures until the final iscsi_post_login_handler() call is able to complete. Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by:
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Nicholas Bellinger authored
commit 417c20a9 upstream. This patch fixes a use-after-free bug in iscsit_release_sessions_for_tpg() where se_portal_group->session_lock was incorrectly released/re-acquired while walking the active se_portal_group->tpg_sess_list. The can result in a NULL pointer dereference when iscsit_close_session() shutdown happens in the normal path asynchronously to this code, causing a bogus dereference of an already freed list entry to occur. To address this bug, walk the session list checking for the same state as before, but move entries to a local list to avoid dropping the lock while walking the active list. As before, signal using iscsi_session->session_restatement=1 for those list entries to be released locally by iscsit_free_session() code. Reported-by:
Sunilkumar Nadumuttlu <sjn@datera.io> Cc: Sunilkumar Nadumuttlu <sjn@datera.io> Signed-off-by:
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Jason Gunthorpe authored
commit efc1eedb upstream. If the above is turned off then ipoib_cm_dev_init unconditionally returns ENOSYS, and the newly added error handling in 0b3957 prevents ipoib from coming up at all: kernel: mlx4_0: ipoib_transport_dev_init failed kernel: mlx4_0: failed to initialize port 1 (ret = -12) Fixes: 0b39578b (IB/ipoib: Use dedicated workqueues per interface) Signed-off-by:
Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by:
Doug Ledford <dledford@redhat.com> Signed-off-by:
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Trond Myklebust authored
commit 03d5eb65 upstream. If the function exits early, then we must put those requests that were not processed back onto the &mirror->pg_list so they can be cleaned up by nfs_pgio_error(). Fixes: a7d42ddb ("nfs: add mirroring support to pgio layer") Signed-off-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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Trond Myklebust authored
commit 3c38cbe2 upstream. Otherwise, nfs4_select_rw_stateid() will always return the zero stateid instead of the correct open stateid. Fixes: f95549cf ("NFSv4: More CLOSE/OPEN races") Signed-off-by:
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Andy Shevchenko authored
commit 5c02a420 upstream. Since NULL is used as valid clock object on optional clocks we have to handle this case in avr32 implementation as well. Fixes: e1824dfe (net: macb: Adjust tx_clk when link speed changes) Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by:
Hans-Christian Egtvedt <egtvedt@samfundet.no> Signed-off-by:
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