- 31 Mar, 2014 14 commits
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Greg Kroah-Hartman authored
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Konstantin Khlebnikov authored
[fixed differently in 6062a8dc upstream.] In older kernels (before v3.10) ipc_rcu_hdr->refcount was non-atomic int. There was possuble double-free bug: do_msgsnd() calls ipc_rcu_putref() under msq->q_perm->lock and RCU, while freequeue() calls it while it holds only 'rw_mutex', so there is no sinchronization between them. Two function decrements '2' non-atomically, they both can get '0' as result. do_msgsnd() freequeue() msq = msg_lock_check(ns, msqid); ... ipc_rcu_getref(msq); msg_unlock(msq); schedule(); (caller locks spinlock) expunge_all(msq, -EIDRM); ss_wakeup(&msq->q_senders, 1); msg_rmid(ns, msq); msg_unlock(msq); ipc_lock_by_ptr(&msq->q_perm); ipc_rcu_putref(msq); ipc_rcu_putref(msq); < both may get get --(...)->refcount == 0 > This patch locks ipc_lock and RCU around ipc_rcu_putref in freequeue. ( RCU protects memory for spin_unlock() ) Similar bugs might be in other users of ipc_rcu_putref(). In the mainline this has been fixed in v3.10 indirectly in commmit 6062a8dc ("ipc,sem: fine grained locking for semtimedop") by Rik van Riel. That commit optimized locking and converted refcount into atomic. I'm not sure that anybody should care about this bug: it's very-very unlikely and no longer exists in actual mainline. I've found this just by looking into the code, probably this never happens in real life. Signed-off-by:
Konstantin Khlebnikov <k.khlebnikov@samsung.com>
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Sarah Sharp authored
commit 1aa9578c upstream. Don Zickus <dzickus@redhat.com> writes: Some co-workers of mine bought Samsung laptops that had mostly usb3 ports. Those ports did not resume correctly (the driver would timeout communicating and fail). This led to frustration as suspend/resume is a common use for laptops. Poking around, I applied the reset on resume quirk to this chipset and the resume started working. Reloading the xhci_hcd module had been the temporary workaround. Signed-off-by:
Sarah Sharp <sarah.a.sharp@linux.intel.com> Reported-by:
Don Zickus <dzickus@redhat.com> Tested-by:
Prarit Bhargava <prarit@redhat.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Marcelo Tosatti authored
commit 26a865f4 upstream. After free_loaded_vmcs executes, the "loaded_vmcs" structure is kfreed, and now vmx->loaded_vmcs points to a kfreed area. Subsequent free_loaded_vmcs then attempts to manipulate vmx->loaded_vmcs. Switch the order to avoid the problem. https://bugzilla.redhat.com/show_bug.cgi?id=1047892Reviewed-by:
Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com> Cc: Josh Boyer <jwboyer@fedoraproject.org> Signed-off-by:
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Marcelo Tosatti authored
commit 989c6b34 upstream. It is possible for __direct_map to be called on invalid root_hpa (-1), two examples: 1) try_async_pf -> can_do_async_pf -> vmx_interrupt_allowed -> nested_vmx_vmexit 2) vmx_handle_exit -> vmx_interrupt_allowed -> nested_vmx_vmexit Then to load_vmcs12_host_state and kvm_mmu_reset_context. Check for this possibility, let fault exception be regenerated. BZ: https://bugzilla.redhat.com/show_bug.cgi?id=924916Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Cc: Josh Boyer <jwboyer@fedoraproject.org> Signed-off-by:
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Hans de Goede authored
commit c15bdfd5 upstream. The current assumption in the elantech driver that hw version 3 touchpads are never clickpads and hw version 4 touchpads are always clickpads is wrong. There are several bug reports for this, ie: https://bugzilla.redhat.com/show_bug.cgi?id=1030802 http://superuser.com/questions/619582/right-elantech-touchpad-button-not-working-in-linux I've spend a couple of hours wading through various bugzillas, launchpads and forum posts to create a list of fw-versions and capabilities for different laptop models to find a good method to differentiate between clickpads and versions with separate hardware buttons. Which shows that a device being a clickpad is reliable indicated by bit 12 being set in the fw_version. I've included the gathered list inside the driver, so that we've this info at hand if we need to revisit this later. Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Reviewed-by:
Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Josh Boyer <jwboyer@fedoraproject.org> Signed-off-by:
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Rob Herring authored
commit 0b53c11d upstream. Move the outer_cache declaration of the CONFIG_OUTER_CACHE ifdef so that outer_cache can be used inside IS_ENABLED condition. Signed-off-by:
Rob Herring <rob.herring@calxeda.com> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by:
Ian Campbell <ian.campbell@citrix.com> Signed-off-by:
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Jean Delvare authored
commit 75135da0 upstream. pci_get_device() decrements the reference count of "from" (last argument) so when we break off the loop successfully we have only one device reference - and we don't know which device we have. If we want a reference to each device, we must take them explicitly and let the pci_get_device() walk complete to avoid duplicate references. This is serious, as over-putting device references will cause the device to eventually disappear. Without this fix, the kernel crashes after a few insmod/rmmod cycles. Tested on an Intel S7000FC4UR system with a 7300 chipset. Signed-off-by:
Jean Delvare <jdelvare@suse.de> Link: http://lkml.kernel.org/r/20140224111656.09bbb7ed@endymion.delvare Cc: Mauro Carvalho Chehab <m.chehab@samsung.com> Cc: Doug Thompson <dougthompson@xmission.com> Cc: stable@vger.kernel.org Signed-off-by:
Borislav Petkov <bp@suse.de> Signed-off-by:
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Dan Carpenter authored
commit 608cfbe4 upstream. The call to clamp_t() first truncates the variable signed 8 bit and as a result, the actual clamp is a no-op. Fixes: 0d78156e ('p54: improve site survey') Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
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Ben Hutchings authored
commit f8ce239d upstream. builddeb generates a control file that says the linux-headers package can only be built for the build system primary architecture. This breaks cross-building configurations. We should use $debarch for this instead. Since $debarch is not yet set when generating the control file, set Architecture: any and use control file variables to fill in the description. Fixes: cd8d60a2 ('kbuild: create linux-headers package in deb-pkg') Reported-and-tested-by:
"Niew, Sh." <shniew@gmail.com> Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
Michal Marek <mmarek@suse.cz> Signed-off-by:
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Alexei Starovoitov authored
commit fdfaf64e upstream. Commit a998d434 claimed to introduce negative offset support to x86 jit, but it couldn't be working, since at the time of the execution of LD+ABS or LD+IND instructions via call into bpf_internal_load_pointer_neg_helper() the %edx (3rd argument of this func) had junk value instead of access size in bytes (1 or 2 or 4). Store size into %edx instead of %ecx (what original commit intended to do) Fixes: a998d434 ("bpf jit: Let the x86 jit handle negative offsets") Signed-off-by:
Alexei Starovoitov <ast@plumgrid.com> Cc: Jan Seiffert <kaffeemonster@googlemail.com> Cc: Eric Dumazet <edumazet@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Ben Hutchings authored
Linux 3.4.83 included an incomplete backport of commit 8a964f44 ('iwlwifi: always copy first 16 bytes of commands') which causes a regression for this driver. This is the missing piece. Reported-by:
Andreas Sturmlechner <andreas.sturmlechner@gmail.com> Cc: Johannes Berg <johannes.berg@intel.com> Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Cc: Jianguo Wu <wujianguo@huawei.com> Cc: Andres Bertens <abertensu@yahoo.com> Tested-by:
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Josh Durgin authored
commit 9a1ea2db upstream. With the current full handling, there is a race between osds and clients getting the first map marked full. If the osd wins, it will return -ENOSPC to any writes, but the client may already have writes in flight. This results in the client getting the error and propagating it up the stack. For rbd, the block layer turns this into EIO, which can cause corruption in filesystems above it. To avoid this race, osds are being changed to drop writes that came from clients with an osdmap older than the last osdmap marked full. In order for this to work, clients must resend all writes after they encounter a full -> not full transition in the osdmap. osds will wait for an updated map instead of processing a request from a client with a newer map, so resent writes will not be dropped by the osd unless there is another not full -> full transition. This approach requires both osds and clients to be fixed to avoid the race. Old clients talking to osds with this fix may hang instead of returning EIO and potentially corrupting an fs. New clients talking to old osds have the same behavior as before if they encounter this race. Fixes: http://tracker.ceph.com/issues/6938Reviewed-by:
Sage Weil <sage@inktank.com> Signed-off-by:
Josh Durgin <josh.durgin@inktank.com> Signed-off-by:
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Charles Keepax authored
commit 749d3223 upstream. The snd_compr_open function would always return 0 even if the compressed ops open function failed, obviously this is incorrect. Looks like this was introduced by a small typo in: commit a0830dbd ALSA: Add a reference counter to card instance This patch returns the value from the compressed op as it should. Signed-off-by:
Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by:
Vinod Koul <vinod.koul@intel.com> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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- 24 Mar, 2014 26 commits
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Greg Kroah-Hartman authored
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Paul E. McKenney authored
commit 5a581b36 upstream. According to the C standard 3.4.3p3, overflow of a signed integer results in undefined behavior. This commit therefore changes the definitions of time_after(), time_after_eq(), time_after64(), and time_after_eq64() to avoid this undefined behavior. The trick is that the subtraction is done using unsigned arithmetic, which according to 6.2.5p9 cannot overflow because it is defined as modulo arithmetic. This has the added (though admittedly quite small) benefit of shortening four lines of code by four characters each. Note that the C standard considers the cast from unsigned to signed to be implementation-defined, see 6.3.1.3p3. However, on a two's-complement system, an implementation that defines anything other than a reinterpretation of the bits is free to come to me, and I will be happy to act as a witness for its being committed to an insane asylum. (Although I have nothing against saturating arithmetic or signals in some cases, these things really should not be the default when compiling an operating-system kernel.) Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: John Stultz <john.stultz@linaro.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Kevin Easton <kevin@guarana.org> [ paulmck: Included time_after64() and time_after_eq64(), as suggested by Eric Dumazet, also fixed commit message.] Reviewed-by:
Josh Triplett <josh@joshtriplett.org> Ruchi Kandoi <kandoiruchi@google.com> Signed-off-by:
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Roman Volkov authored
commit 1f91ecc1 upstream. When selecting the audio output destinations (headphones, FP headphones, multichannel output), the channel routing should be changed depending on what destination selected. Also unnecessary I2S channels are digitally muted. This function called when the user selects the destination in the ALSA mixer. Signed-off-by:
Roman Volkov <v1ron@mail.ru> Signed-off-by:
Clemens Ladisch <clemens@ladisch.de> Signed-off-by:
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Filipe David Borba Manana authored
commit a2aa75e1 upstream. When using a mix of compressed file extents and prealloc extents, it is possible to fill a page of a file with random, garbage data from some unrelated previous use of the page, instead of a sequence of zeroes. A simple sequence of steps to get into such case, taken from the test case I made for xfstests, is: _scratch_mkfs _scratch_mount "-o compress-force=lzo" $XFS_IO_PROG -f -c "pwrite -S 0x06 -b 18670 266978 18670" $SCRATCH_MNT/foobar $XFS_IO_PROG -c "falloc 26450 665194" $SCRATCH_MNT/foobar $XFS_IO_PROG -c "truncate 542872" $SCRATCH_MNT/foobar $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/foobar This results in the following file items in the fs tree: item 4 key (257 INODE_ITEM 0) itemoff 15879 itemsize 160 inode generation 6 transid 6 size 542872 block group 0 mode 100600 item 5 key (257 INODE_REF 256) itemoff 15863 itemsize 16 inode ref index 2 namelen 6 name: foobar item 6 key (257 EXTENT_DATA 0) itemoff 15810 itemsize 53 extent data disk byte 0 nr 0 gen 6 extent data offset 0 nr 24576 ram 266240 extent compression 0 item 7 key (257 EXTENT_DATA 24576) itemoff 15757 itemsize 53 prealloc data disk byte 12849152 nr 241664 gen 6 prealloc data offset 0 nr 241664 item 8 key (257 EXTENT_DATA 266240) itemoff 15704 itemsize 53 extent data disk byte 12845056 nr 4096 gen 6 extent data offset 0 nr 20480 ram 20480 extent compression 2 item 9 key (257 EXTENT_DATA 286720) itemoff 15651 itemsize 53 prealloc data disk byte 13090816 nr 405504 gen 6 prealloc data offset 0 nr 258048 The on disk extent at offset 266240 (which corresponds to 1 single disk block), contains 5 compressed chunks of file data. Each of the first 4 compress 4096 bytes of file data, while the last one only compresses 3024 bytes of file data. Therefore a read into the file region [285648 ; 286720[ (length = 4096 - 3024 = 1072 bytes) should always return zeroes (our next extent is a prealloc one). The solution here is the compression code path to zero the remaining (untouched) bytes of the last page it uncompressed data into, as the information about how much space the file data consumes in the last page is not known in the upper layer fs/btrfs/extent_io.c:__do_readpage(). In __do_readpage we were correctly zeroing the remainder of the page but only if it corresponds to the last page of the inode and if the inode's size is not a multiple of the page size. This would cause not only returning random data on reads, but also permanently storing random data when updating parts of the region that should be zeroed. For the example above, it means updating a single byte in the region [285648 ; 286720[ would store that byte correctly but also store random data on disk. A test case for xfstests follows soon. Signed-off-by:
Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by:
Chris Mason <clm@fb.com> Signed-off-by:
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Ales Novak authored
commit b12bb60d upstream. If the initialization of storvsc fails, the storvsc_device_destroy() causes NULL pointer dereference. storvsc_bus_scan() scsi_scan_target() __scsi_scan_target() scsi_probe_and_add_lun(hostdata=NULL) scsi_alloc_sdev(hostdata=NULL) sdev->hostdata = hostdata now the host allocation fails __scsi_remove_device(sdev) calls sdev->host->hostt->slave_destroy() == storvsc_device_destroy(sdev) access of sdev->hostdata->request_mempool Signed-off-by:
Ales Novak <alnovak@suse.cz> Signed-off-by:
Thomas Abraham <tabraham@suse.com> Reviewed-by:
Jiri Kosina <jkosina@suse.cz> Acked-by:
K. Y. Srinivasan <kys@microsoft.com> Signed-off-by:
James Bottomley <JBottomley@Parallels.com> Signed-off-by:
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Giridhar Malavali authored
commit b77ed25c upstream. Signed-off-by:
Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by:
Saurav Kashyap <saurav.kashyap@qlogic.com> Signed-off-by:
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Lukasz Dorau authored
commit c59053a2 upstream. In the first place, the loop 'for' in the macro 'for_each_isci_host' (drivers/scsi/isci/host.h:314) is incorrect, because it accesses the 3rd element of 2 element array. After the 2nd iteration it executes the instruction: ihost = to_pci_info(pdev)->hosts[2] (while the size of the 'hosts' array equals 2) and reads an out of range element. In the second place, this loop is incorrectly optimized by GCC v4.8 (see http://marc.info/?l=linux-kernel&m=138998871911336&w=2). As a result, on platforms with two SCU controllers, the loop is executed more times than it can be (for i=0,1 and 2). It causes kernel panic during entering the S3 state and the following oops after 'rmmod isci': BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff8131360b>] __list_add+0x1b/0xc0 Oops: 0000 [#1] SMP RIP: 0010:[<ffffffff8131360b>] [<ffffffff8131360b>] __list_add+0x1b/0xc0 Call Trace: [<ffffffff81661b84>] __mutex_lock_slowpath+0x114/0x1b0 [<ffffffff81661c3f>] mutex_lock+0x1f/0x30 [<ffffffffa03e97cb>] sas_disable_events+0x1b/0x50 [libsas] [<ffffffffa03e9818>] sas_unregister_ha+0x18/0x60 [libsas] [<ffffffffa040316e>] isci_unregister+0x1e/0x40 [isci] [<ffffffffa0403efd>] isci_pci_remove+0x5d/0x100 [isci] [<ffffffff813391cb>] pci_device_remove+0x3b/0xb0 [<ffffffff813fbf7f>] __device_release_driver+0x7f/0xf0 [<ffffffff813fc8f8>] driver_detach+0xa8/0xb0 [<ffffffff813fbb8b>] bus_remove_driver+0x9b/0x120 [<ffffffff813fcf2c>] driver_unregister+0x2c/0x50 [<ffffffff813381f3>] pci_unregister_driver+0x23/0x80 [<ffffffffa04152f8>] isci_exit+0x10/0x1e [isci] [<ffffffff810d199b>] SyS_delete_module+0x16b/0x2d0 [<ffffffff81012a21>] ? do_notify_resume+0x61/0xa0 [<ffffffff8166ce29>] system_call_fastpath+0x16/0x1b The loop has been corrected. This patch fixes kernel panic during entering the S3 state and the above oops. Signed-off-by:
Lukasz Dorau <lukasz.dorau@intel.com> Reviewed-by:
Maciej Patelczyk <maciej.patelczyk@intel.com> Tested-by:
Dan Williams <dan.j.williams@intel.com> Signed-off-by:
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Dan Williams authored
commit ddfadd77 upstream. Remove an erroneous BUG_ON() in the case of a hard reset timeout. The reset timeout handler puts the port into the "awaiting link-up" state. The timeout causes the device to be disconnected and we need to be in the awaiting link-up state to re-connect the port. The BUG_ON() made the incorrect assumption that resets never timeout and we always complete the reset in the "resetting" state. Testing this patch also uncovered that libata continues to attempt to reset the port long after the driver has torn down the context. Once the driver has committed to abandoning the link it must indicate to libata that recovery ends by returning -ENODEV from ->lldd_I_T_nexus_reset(). Acked-by:
David Milburn <dmilburn@redhat.com> Reported-by:
Xun Ni <xun.ni@intel.com> Tested-by:
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Marc Kleine-Budde authored
commit 7e9e148a upstream. If flexcan_chip_start() in flexcan_open() fails, the interrupt is not freed, this patch adds the missing cleanup. Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by:
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Arnd Bergmann authored
commit 0a8d8c44 upstream. Since commit d25f06ea "vmxnet3: fix netpoll race condition", the vmxnet3 driver fails to build when CONFIG_PCI_MSI is disabled, because it unconditionally references the vmxnet3_msix_rx() function. To fix this, use the same #ifdef in the caller that exists around the function definition. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Shreyas Bhatewara <sbhatewara@vmware.com> Cc: "VMware, Inc." <pv-drivers@vmware.com> Cc: "David S. Miller" <davem@davemloft.net> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Signed-off-by:
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Neil Horman authored
commit d25f06ea upstream. vmxnet3's netpoll driver is incorrectly coded. It directly calls vmxnet3_do_poll, which is the driver internal napi poll routine. As the netpoll controller method doesn't block real napi polls in any way, there is a potential for race conditions in which the netpoll controller method and the napi poll method run concurrently. The result is data corruption causing panics such as this one recently observed: PID: 1371 TASK: ffff88023762caa0 CPU: 1 COMMAND: "rs:main Q:Reg" #0 [ffff88023abd5780] machine_kexec at ffffffff81038f3b #1 [ffff88023abd57e0] crash_kexec at ffffffff810c5d92 #2 [ffff88023abd58b0] oops_end at ffffffff8152b570 #3 [ffff88023abd58e0] die at ffffffff81010e0b #4 [ffff88023abd5910] do_trap at ffffffff8152add4 #5 [ffff88023abd5970] do_invalid_op at ffffffff8100cf95 #6 [ffff88023abd5a10] invalid_op at ffffffff8100bf9b [exception RIP: vmxnet3_rq_rx_complete+1968] RIP: ffffffffa00f1e80 RSP: ffff88023abd5ac8 RFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88023b5dcee0 RCX: 00000000000000c0 RDX: 0000000000000000 RSI: 00000000000005f2 RDI: ffff88023b5dcee0 RBP: ffff88023abd5b48 R8: 0000000000000000 R9: ffff88023a3b6048 R10: 0000000000000000 R11: 0000000000000002 R12: ffff8802398d4cd8 R13: ffff88023af35140 R14: ffff88023b60c890 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #7 [ffff88023abd5b50] vmxnet3_do_poll at ffffffffa00f204a [vmxnet3] #8 [ffff88023abd5b80] vmxnet3_netpoll at ffffffffa00f209c [vmxnet3] #9 [ffff88023abd5ba0] netpoll_poll_dev at ffffffff81472bb7 The fix is to do as other drivers do, and have the poll controller call the top half interrupt handler, which schedules a napi poll properly to recieve frames Tested by myself, successfully. Signed-off-by:
Shreyas N Bhatewara <sbhatewara@vmware.com> Signed-off-by:
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Radim Krčmář authored
commit 596f3142 upstream. We always disable cr8 intercept in its handler, but only re-enable it if handling KVM_REQ_EVENT, so there can be a window where we do not intercept cr8 writes, which allows an interrupt to disrupt a higher priority task. Fix this by disabling intercepts in the same function that re-enables them when needed. This fixes BSOD in Windows 2008. Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Reviewed-by:
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Alex Deucher authored
commit d03874c8 upstream. We need to check for DVI vs. HDMI when setting up duallink since HDMI is single link only. Fixes 4k modes on newer asics. bug: https://bugs.freedesktop.org/show_bug.cgi?id=75223Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Artem Fetishev authored
commit 70335abb upstream. The expected logic of proc_map_files_get_link() is either to return 0 and initialize 'path' or return an error and leave 'path' uninitialized. By the time dname_to_vma_addr() returns 0 the corresponding vma may have already be gone. In this case the path is not initialized but the return value is still 0. This results in 'general protection fault' inside d_path(). Steps to reproduce: CONFIG_CHECKPOINT_RESTORE=y fd = open(...); while (1) { mmap(fd, ...); munmap(fd, ...); } ls -la /proc/$PID/map_files Addresses https://bugzilla.kernel.org/show_bug.cgi?id=68991Signed-off-by:
Artem Fetishev <artem_fetishev@epam.com> Signed-off-by:
Aleksandr Terekhov <aleksandr_terekhov@epam.com> Reported-by: <wiebittewas@gmail.com> Acked-by:
Pavel Emelyanov <xemul@parallels.com> Acked-by:
Cyrill Gorcunov <gorcunov@openvz.org> Reviewed-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Trond Myklebust authored
commit 755a48a7 upstream. The clean-up in commit 36281caa ended up removing a NULL pointer check that is needed in order to prevent an Oops in nfs_async_inode_return_delegation(). Reported-by:
"Yan, Zheng" <zheng.z.yan@intel.com> Link: http://lkml.kernel.org/r/5313E9F6.2020405@intel.com Fixes: 36281caa (NFSv4: Further clean-ups of delegation stateid validation) Signed-off-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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Michele Baldessari authored
commit b28a613e upstream. Via commit 87809942 "libata: add ATA_HORKAGE_BROKEN_FPDMA_AA quirk for Seagate Momentus SpinPoint M8" we added a quirk for disks named "ST1000LM024 HN-M101MBB" with firmware revision "2AR10001". As reported on https://bugzilla.redhat.com/show_bug.cgi?id=1073901, we need to also add firmware revision 2BA30001 as it is broken as well. Reported-by:
Nicholas <arealityfarbetween@googlemail.com> Signed-off-by:
Michele Baldessari <michele@acksyn.org> Tested-by:
Guilherme Amadio <guilherme.amadio@gmail.com> Signed-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Tejun Heo authored
commit 70044d71 upstream. PREPARE_[DELAYED_]WORK() are being phased out. They have few users and a nasty surprise in terms of reentrancy guarantee as workqueue considers work items to be different if they don't have the same work function. firewire core-device and sbp2 have been been multiplexing work items with multiple work functions. Introduce fw_device_workfn() and sbp2_lu_workfn() which invoke fw_device->workfn and sbp2_logical_unit->workfn respectively and always use the two functions as the work functions and update the users to set the ->workfn fields instead of overriding work functions using PREPARE_DELAYED_WORK(). This fixes a variety of possible regressions since a2c1c57b "workqueue: consider work function when searching for busy work items" due to which fw_workqueue lost its required non-reentrancy property. Signed-off-by:
Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: linux1394-devel@lists.sourceforge.net Signed-off-by:
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Stefan Richter authored
commit 89875833 upstream. Commit 8408dc1c "firewire: net: use dev_printk API" introduced a use-after-free in a failure path. fwnet_transmit_packet_failed(ptask) may free ptask, then the dev_err() call dereferenced it. The fix is straightforward; simply reorder the two calls. Reported-by:
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Steven Rostedt (Red Hat) authored
commit 45ab2813 upstream. If a module fails to add its tracepoints due to module tainting, do not create the module event infrastructure in the debugfs directory. As the events will not work and worse yet, they will silently fail, making the user wonder why the events they enable do not display anything. Having a warning on module load and the events not visible to the users will make the cause of the problem much clearer. Link: http://lkml.kernel.org/r/20140227154923.265882695@goodmis.org Fixes: 6d723736 "tracing/events: add support for modules to TRACE_EVENT" Acked-by:
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
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Li Zefan authored
commit 99afb0fd upstream. It's not safe to access task's cpuset after releasing task_lock(). Holding callback_mutex won't help. Signed-off-by:
Li Zefan <lizefan@huawei.com> Signed-off-by:
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Chuansheng Liu authored
commit c685689f upstream. We hit one rare case below: T1 calling disable_irq(), but hanging at synchronize_irq() always; The corresponding irq thread is in sleeping state; And all CPUs are in idle state; After analysis, we found there is one possible scenerio which causes T1 is waiting there forever: CPU0 CPU1 synchronize_irq() wait_event() spin_lock() atomic_dec_and_test(&threads_active) insert the __wait into queue spin_unlock() if(waitqueue_active) atomic_read(&threads_active) wake_up() Here after inserted the __wait into queue on CPU0, and before test if queue is empty on CPU1, there is no barrier, it maybe cause it is not visible for CPU1 immediately, although CPU0 has updated the queue list. It is similar for CPU0 atomic_read() threads_active also. So we'd need one smp_mb() before waitqueue_active.that, but removing the waitqueue_active() check solves it as wel l and it makes things simple and clear. Signed-off-by:
Chuansheng Liu <chuansheng.liu@intel.com> Cc: Xiaoming Wang <xiaoming.wang@intel.com> Link: http://lkml.kernel.org/r/1393212590-32543-1-git-send-email-chuansheng.liu@intel.comSigned-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Daniel J Blueman authored
commit 847d7970 upstream. For systems with multiple servers and routed fabric, all northbridges get assigned to the first server. Fix this by also using the node reported from the PCI bus. For single-fabric systems, the northbriges are on PCI bus 0 by definition, which are on NUMA node 0 by definition, so this is invarient on most systems. Tested on fam10h and fam15h single and multi-fabric systems and candidate for stable. Signed-off-by:
Daniel J Blueman <daniel@numascale.com> Acked-by:
Steffen Persvold <sp@numascale.com> Acked-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Linus Walleij authored
commit 052450fd upstream. Due to a problem in the MFD Kconfig it was not possible to compile the UCB battery driver for the Collie SA1100 system, in turn making it impossible to compile in the battery driver. (See patch "mfd: include all drivers in subsystem menu".) After fixing the MFD Kconfig (separate patch) a compile error appears in the Collie battery driver due to the <mach/collie.h> implicitly requiring <mach/hardware.h> through <linux/gpio.h> via <mach/gpio.h> prior to commit 40ca061b "ARM: 7841/1: sa1100: remove complex GPIO interface". Fix this up by including the required header into <mach/collie.h>. Cc: Andrea Adami <andrea.adami@gmail.com> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
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Anton Blanchard authored
commit a5b2cf5b upstream. The 64bit relocation code places a few symbols in the text segment. These symbols are only 4 byte aligned where they need to be 8 byte aligned. Add an explicit alignment. Signed-off-by:
Anton Blanchard <anton@samba.org> Tested-by:
Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Takashi Iwai authored
commit e805ca8b upstream. Logitech C500 (046d:0807) needs the same workaround like other Logitech Webcams. Signed-off-by:
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Roman Volkov authored
commit 3dd77654 upstream. Actually CS4245 connected to the I2S channel 1 for capture, not channel 2. Otherwise capturing and playback does not work for CS4245. Signed-off-by:
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