- 08 Mar, 2016 40 commits
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Simon Guinot authored
commit 59ceeaaf upstream. In __request_region, if a conflict with a BUSY and MUXED resource is detected, then the caller goes to sleep and waits for the resource to be released. A pointer on the conflicting resource is kept. At wake-up this pointer is used as a parent to retry to request the region. A first problem is that this pointer might well be invalid (if for example the conflicting resource have already been freed). Another problem is that the next call to __request_region() fails to detect a remaining conflict. The previously conflicting resource is passed as a parameter and __request_region() will look for a conflict among the children of this resource and not at the resource itself. It is likely to succeed anyway, even if there is still a conflict. Instead, the parent of the conflicting resource should be passed to __request_region(). As a fix, this patch doesn't update the parent resource pointer in the case we have to wait for a muxed region right after. Reported-and-tested-by:
Vincent Pelletier <plr.vincent@gmail.com> Signed-off-by:
Simon Guinot <simon.guinot@sequanux.org> Tested-by:
Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Kamal Mostafa <kamal@canonical.com>
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Jan Kara authored
commit 74dae427 upstream. Competing overwrite DIO in dioread_nolock mode will just overwrite pointer to io_end in the inode. This may result in data corruption or extent conversion happening from IO completion interrupt because we don't properly set buffer_defer_completion() when unlocked DIO races with locked DIO to unwritten extent. Since unlocked DIO doesn't need io_end for anything, just avoid allocating it and corrupting pointer from inode for locked DIO. A cleaner fix would be to avoid these games with io_end pointer from the inode but that requires more intrusive changes so we leave that for later. Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
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Jan Kara authored
commit ed8ad838 upstream. ext4 can update bh->b_state non-atomically in _ext4_get_block() and ext4_da_get_block_prep(). Usually this is fine since bh is just a temporary storage for mapping information on stack but in some cases it can be fully living bh attached to a page. In such case non-atomic update of bh->b_state can race with an atomic update which then gets lost. Usually when we are mapping bh and thus updating bh->b_state non-atomically, nobody else touches the bh and so things work out fine but there is one case to especially worry about: ext4_finish_bio() uses BH_Uptodate_Lock on the first bh in the page to synchronize handling of PageWriteback state. So when blocksize < pagesize, we can be atomically modifying bh->b_state of a buffer that actually isn't under IO and thus can race e.g. with delalloc trying to map that buffer. The result is that we can mistakenly set / clear BH_Uptodate_Lock bit resulting in the corruption of PageWriteback state or missed unlock of BH_Uptodate_Lock. Fix the problem by always updating bh->b_state bits atomically. Reported-by:
Nikolay Borisov <kernel@kyup.com> Signed-off-by:
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Peter Rosin authored
commit acc14694 upstream. Make the divisor signed as DIV_ROUND_CLOSEST is undefined for negative dividends when the divisor is unsigned. Signed-off-by:
Peter Rosin <peda@axentia.se> Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
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Bjørn Mork authored
commit d061c1ca upstream. Thomas reports: T: Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 4 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=05c6 ProdID=6001 Rev=00.00 S: Manufacturer=USB Modem S: Product=USB Modem S: SerialNumber=1234567890ABCDEF C: #Ifs= 5 Cfg#= 1 Atr=e0 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan I: If#= 4 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage Reported-by:
Thomas Schäfer <tschaefer@t-online.de> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Ken Lin authored
commit 6627ae19 upstream. Add USB ID for cp2104/5 devices on GE B650v3 and B850v3 boards. Signed-off-by:
Ken Lin <ken.lin@advantech.com.tw> Signed-off-by:
Akshay Bhat <akshay.bhat@timesys.com> Signed-off-by:
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Andrey Skvortsov authored
commit 3158a8d4 upstream. $ lsusb: Bus 001 Device 101: ID 1e0e:9001 Qualcomm / Option $ usb-devices: T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#=101 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 2 P: Vendor=1e0e ProdID=9001 Rev= 2.32 S: Manufacturer=SimTech, Incorporated S: Product=SimTech, Incorporated S: SerialNumber=0123456789ABCDEF C:* #Ifs= 7 Cfg#= 1 Atr=80 MxPwr=500mA I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I:* If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option I:* If#= 5 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan I:* If#= 6 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none) The last interface (6) is used for Android Composite ADB interface. Serial port layout: 0: QCDM/DIAG 1: NMEA 2: AT 3: AT/PPP 4: audio Signed-off-by:
Andrey Skvortsov <andrej.skvortzov@gmail.com> Signed-off-by:
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Takashi Iwai authored
commit 67ec1072 upstream. A non-atomic PCM stream may take snd_pcm_link_rwsem rw semaphore twice in the same code path, e.g. one in snd_pcm_action_nonatomic() and another in snd_pcm_stream_lock(). Usually this is OK, but when a write lock is issued between these two read locks, the problem happens: the write lock is blocked due to the first reade lock, and the second read lock is also blocked by the write lock. This eventually deadlocks. The reason is the way rwsem manages waiters; it's queued like FIFO, so even if the writer itself doesn't take the lock yet, it blocks all the waiters (including reads) queued after it. As a workaround, in this patch, we replace the standard down_write() with an spinning loop. This is far from optimal, but it's good enough, as the spinning time is supposed to be relatively short for normal PCM operations, and the code paths requiring the write lock aren't called so often. Reported-by:
Vinod Koul <vinod.koul@intel.com> Tested-by:
Ramesh Babu <ramesh.babu@intel.com> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Benjamin Coddington authored
commit d9dfd8d7 upstream. In the case where d_add_unique() finds an appropriate alias to use it will have already incremented the reference count. An additional dget() to swap the open context's dentry is unnecessary and will leak a reference. Signed-off-by:
Benjamin Coddington <bcodding@redhat.com> Fixes: 275bb307 ("NFSv4: Move dentry instantiation into the NFSv4-...") Signed-off-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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John Youn authored
commit c4509601 upstream. The assignement of EP transfer resources was not handled properly in the dwc3 driver. Commit aebda618 ("usb: dwc3: Reset the transfer resource index on SET_INTERFACE") previously fixed one aspect of this where resources may be exhausted with multiple calls to SET_INTERFACE. However, it introduced an issue where composite devices with multiple interfaces can be assigned the same transfer resources for different endpoints. This patch solves both issues. The assignment of transfer resources cannot perfectly follow the data book due to the fact that the controller driver does not have all knowledge of the configuration in advance. It is given this information piecemeal by the composite gadget framework after every SET_CONFIGURATION and SET_INTERFACE. Trying to follow the databook programming model in this scenario can cause errors. For two reasons: 1) The databook says to do DEPSTARTCFG for every SET_CONFIGURATION and SET_INTERFACE (8.1.5). This is incorrect in the scenario of multiple interfaces. 2) The databook does not mention doing more DEPXFERCFG for new endpoint on alt setting (8.1.6). The following simplified method is used instead: All hardware endpoints can be assigned a transfer resource and this setting will stay persistent until either a core reset or hibernation. So whenever we do a DEPSTARTCFG(0) we can go ahead and do DEPXFERCFG for every hardware endpoint as well. We are guaranteed that there are as many transfer resources as endpoints. This patch triggers off of the calling dwc3_gadget_start_config() for EP0-out, which always happens first, and which should only happen in one of the above conditions. Fixes: aebda618 ("usb: dwc3: Reset the transfer resource index on SET_INTERFACE") Reported-by:
Ravi Babu <ravibabu@ti.com> Signed-off-by:
John Youn <johnyoun@synopsys.com> Signed-off-by:
Felipe Balbi <balbi@kernel.org> Signed-off-by:
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Mario Kleiner authored
commit bb74fc1b upstream. drm_vblank_offdelay can have three different types of values: < 0 is to be always treated the same as dev->vblank_disable_immediate = 0 is to be treated as "never disable vblanks" > 0 is to be treated as disable immediate if kms driver wants it that way via dev->vblank_disable_immediate. Otherwise it is a disable timeout in msecs. This got broken in Linux 3.18+ for the implementation of drm_vblank_on. If the user specified a value of zero which should always reenable vblank irqs in this function, a kms driver could override the users choice by setting vblank_disable_immediate to true. This patch fixes the regression and keeps the user in control. v2: Only reenable vblank if there are clients left or the user requested to "never disable vblanks" via offdelay 0. Enabling vblanks even in the "delayed disable" case (offdelay > 0) was specifically added by Ville in commit cd19e52a ("drm: Kick start vblank interrupts at drm_vblank_on()"), but after discussion it turns out that this was done by accident. Citing Ville: "I think it just ended up as a mess due to changing some of the semantics of offdelay<0 vs. offdelay==0 vs. disable_immediate during the review of the series. So yeah, given how drm_vblank_put() works now, I'd just make this check for offdelay==0." Signed-off-by:
Mario Kleiner <mario.kleiner.de@gmail.com> Reviewed-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Cc: michel@daenzer.net Cc: vbabka@suse.cz Cc: ville.syrjala@linux.intel.com Cc: daniel.vetter@ffwll.ch Cc: dri-devel@lists.freedesktop.org Cc: alexander.deucher@amd.com Cc: christian.koenig@amd.com Signed-off-by:
Dave Airlie <airlied@redhat.com> Signed-off-by:
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Gerd Hoffmann authored
commit 34855706 upstream. This avoids integer overflows on 32bit machines when calculating reloc_info size, as reported by Alan Cox. Cc: gnomes@lxorguk.ukuu.org.uk Signed-off-by:
Gerd Hoffmann <kraxel@redhat.com> Reviewed-by:
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Rasmus Villemoes authored
commit bc3f5d8c upstream. We need to use post-decrement to get the pci_map_page undone also for i==0, and to avoid some very unpleasant behaviour if pci_map_page failed already at i==0. Reviewed-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Takashi Iwai authored
commit 13d5e5d4 upstream. The commit [7f0973e9: ALSA: seq: Fix lockdep warnings due to double mutex locks] split the management of two linked lists (source and destination) into two individual calls for avoiding the AB/BA deadlock. However, this may leave the possible double deletion of one of two lists when the counterpart is being deleted concurrently. It ends up with a list corruption, as revealed by syzkaller fuzzer. This patch fixes it by checking the list emptiness and skipping the deletion and the following process. BugLink: http://lkml.kernel.org/r/CACT4Y+bay9qsrz6dQu31EcGaH9XwfW7o3oBzSQUG9fMszoh=Sg@mail.gmail.com Fixes: 7f0973e9 ('ALSA: seq: Fix lockdep warnings due to 'double mutex locks) Reported-by:
Dmitry Vyukov <dvyukov@google.com> Tested-by:
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Arnd Bergmann authored
commit b33c8ff4 upstream. In my randconfig tests, I came across a bug that involves several components: * gcc-4.9 through at least 5.3 * CONFIG_GCOV_PROFILE_ALL enabling -fprofile-arcs for all files * CONFIG_PROFILE_ALL_BRANCHES overriding every if() * The optimized implementation of do_div() that tries to replace a library call with an division by multiplication * code in drivers/media/dvb-frontends/zl10353.c doing u32 adc_clock = 450560; /* 45.056 MHz */ if (state->config.adc_clock) adc_clock = state->config.adc_clock; do_div(value, adc_clock); In this case, gcc fails to determine whether the divisor in do_div() is __builtin_constant_p(). In particular, it concludes that __builtin_constant_p(adc_clock) is false, while __builtin_constant_p(!!adc_clock) is true. That in turn throws off the logic in do_div() that also uses __builtin_constant_p(), and instead of picking either the constant- optimized division, and the code in ilog2() that uses __builtin_constant_p() to figure out whether it knows the answer at compile time. The result is a link error from failing to find multiple symbols that should never have been called based on the __builtin_constant_p(): dvb-frontends/zl10353.c:138: undefined reference to `____ilog2_NaN' dvb-frontends/zl10353.c:138: undefined reference to `__aeabi_uldivmod' ERROR: "____ilog2_NaN" [drivers/media/dvb-frontends/zl10353.ko] undefined! ERROR: "__aeabi_uldivmod" [drivers/media/dvb-frontends/zl10353.ko] undefined! This patch avoids the problem by changing __trace_if() to check whether the condition is known at compile-time to be nonzero, rather than checking whether it is actually a constant. I see this one link error in roughly one out of 1600 randconfig builds on ARM, and the patch fixes all known instances. Link: http://lkml.kernel.org/r/1455312410-1058841-1-git-send-email-arnd@arndb.deAcked-by:
Nicolas Pitre <nico@linaro.org> Fixes: ab3c9c68 ("branch tracer, intel-iommu: fix build with CONFIG_BRANCH_TRACER=y") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
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Steven Rostedt (Red Hat) authored
commit f3775549 upstream. The tracepoint infrastructure uses RCU sched protection to enable and disable tracepoints safely. There are some instances where tracepoints are used in infrastructure code (like kfree()) that get called after a CPU is going offline, and perhaps when it is coming back online but hasn't been registered yet. This can probuce the following warning: [ INFO: suspicious RCU usage. ] 4.4.0-00006-g0fe53e8-dirty #34 Tainted: G S ------------------------------- include/trace/events/kmem.h:141 suspicious rcu_dereference_check() usage! other info that might help us debug this: RCU used illegally from offline CPU! rcu_scheduler_active = 1, debug_locks = 1 no locks held by swapper/8/0. stack backtrace: CPU: 8 PID: 0 Comm: swapper/8 Tainted: G S 4.4.0-00006-g0fe53e8-dirty #34 Call Trace: [c0000005b76c78d0] [c0000000008b9540] .dump_stack+0x98/0xd4 (unreliable) [c0000005b76c7950] [c00000000010c898] .lockdep_rcu_suspicious+0x108/0x170 [c0000005b76c79e0] [c00000000029adc0] .kfree+0x390/0x440 [c0000005b76c7a80] [c000000000055f74] .destroy_context+0x44/0x100 [c0000005b76c7b00] [c0000000000934a0] .__mmdrop+0x60/0x150 [c0000005b76c7b90] [c0000000000e3ff0] .idle_task_exit+0x130/0x140 [c0000005b76c7c20] [c000000000075804] .pseries_mach_cpu_die+0x64/0x310 [c0000005b76c7cd0] [c000000000043e7c] .cpu_die+0x3c/0x60 [c0000005b76c7d40] [c0000000000188d8] .arch_cpu_idle_dead+0x28/0x40 [c0000005b76c7db0] [c000000000101e6c] .cpu_startup_entry+0x50c/0x560 [c0000005b76c7ed0] [c000000000043bd8] .start_secondary+0x328/0x360 [c0000005b76c7f90] [c000000000008a6c] start_secondary_prolog+0x10/0x14 This warning is not a false positive either. RCU is not protecting code that is being executed while the CPU is offline. Instead of playing "whack-a-mole(TM)" and adding conditional statements to the tracepoints we find that are used in this instance, simply add a cpu_online() test to the tracepoint code where the tracepoint will be ignored if the CPU is offline. Use of raw_smp_processor_id() is fine, as there should never be a case where the tracepoint code goes from running on a CPU that is online and suddenly gets migrated to a CPU that is offline. Link: http://lkml.kernel.org/r/1455387773-4245-1-git-send-email-kda@linux-powerpc.orgReported-by:
Denis Kirjanov <kda@linux-powerpc.org> Fixes: 97e1c18e ("tracing: Kernel Tracepoints") Signed-off-by:
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Andy Shevchenko authored
commit ee1cdcda upstream. The commit 2895b2ca ("dmaengine: dw: fix cyclic transfer callbacks") re-enabled BLOCK interrupts with regard to make cyclic transfers work. However, this change becomes a regression for non-cyclic transfers as interrupt counters under stress test had been grown enormously (approximately per 4-5 bytes in the UART loop back test). Taking into consideration above enable BLOCK interrupts if and only if channel is programmed to perform cyclic transfer. Fixes: 2895b2ca ("dmaengine: dw: fix cyclic transfer callbacks") Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by:
Mans Rullgard <mans@mansr.com> Tested-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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Takashi Iwai authored
commit 0b8c8219 upstream. The commit [991f86d7: ALSA: hda - Flush the pending probe work at remove] introduced the sync of async probe work at remove for fixing the race. However, this may lead to another hangup when the module removal is performed quickly before starting the probe work, because it issues flush_work() and it's blocked forever. The workaround is to use cancel_work_sync() instead of flush_work() there. Fixes: 991f86d7 ('ALSA: hda - Flush the pending probe work at remove') Signed-off-by:
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Takashi Iwai authored
commit d99a36f4 upstream. When multiple concurrent writes happen on the ALSA sequencer device right after the open, it may try to allocate vmalloc buffer for each write and leak some of them. It's because the presence check and the assignment of the buffer is done outside the spinlock for the pool. The fix is to move the check and the assignment into the spinlock. (The current implementation is suboptimal, as there can be multiple unnecessary vmallocs because the allocation is done before the check in the spinlock. But the pool size is already checked beforehand, so this isn't a big problem; that is, the only possible path is the multiple writes before any pool assignment, and practically seen, the current coverage should be "good enough".) The issue was triggered by syzkaller fuzzer. BugLink: http://lkml.kernel.org/r/CACT4Y+bSzazpXNvtAr=WXaL8hptqjHwqEyFA+VN2AWEx=aurkg@mail.gmail.comReported-by:
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Takashi Iwai authored
commit 24db8bba upstream. The kernel memory allocators already report the errors when the requested allocation fails, thus we don't need to warn it again in each caller side. Signed-off-by:
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Konrad Rzeszutek Wilk authored
commit 4d8c8bd6 upstream. Occasionaly PV guests would crash with: pciback 0000:00:00.1: Xen PCI mapped GSI0 to IRQ16 BUG: unable to handle kernel paging request at 0000000d1a8c0be0 .. snip.. <ffffffff8139ce1b>] find_next_bit+0xb/0x10 [<ffffffff81387f22>] cpumask_next_and+0x22/0x40 [<ffffffff813c1ef8>] pci_device_probe+0xb8/0x120 [<ffffffff81529097>] ? driver_sysfs_add+0x77/0xa0 [<ffffffff815293e4>] driver_probe_device+0x1a4/0x2d0 [<ffffffff813c1ddd>] ? pci_match_device+0xdd/0x110 [<ffffffff81529657>] __device_attach_driver+0xa7/0xb0 [<ffffffff815295b0>] ? __driver_attach+0xa0/0xa0 [<ffffffff81527622>] bus_for_each_drv+0x62/0x90 [<ffffffff8152978d>] __device_attach+0xbd/0x110 [<ffffffff815297fb>] device_attach+0xb/0x10 [<ffffffff813b75ac>] pci_bus_add_device+0x3c/0x70 [<ffffffff813b7618>] pci_bus_add_devices+0x38/0x80 [<ffffffff813dc34e>] pcifront_scan_root+0x13e/0x1a0 [<ffffffff817a0692>] pcifront_backend_changed+0x262/0x60b [<ffffffff814644c6>] ? xenbus_gather+0xd6/0x160 [<ffffffff8120900f>] ? put_object+0x2f/0x50 [<ffffffff81465c1d>] xenbus_otherend_changed+0x9d/0xa0 [<ffffffff814678ee>] backend_changed+0xe/0x10 [<ffffffff81463a28>] xenwatch_thread+0xc8/0x190 [<ffffffff810f22f0>] ? woken_wake_function+0x10/0x10 which was the result of two things: When we call pci_scan_root_bus we would pass in 'sd' (sysdata) pointer which was an 'pcifront_sd' structure. However in the pci_device_add it expects that the 'sd' is 'struct sysdata' and sets the dev->node to what is in sd->node (offset 4): set_dev_node(&dev->dev, pcibus_to_node(bus)); __pcibus_to_node(const struct pci_bus *bus) { const struct pci_sysdata *sd = bus->sysdata; return sd->node; } However our structure was pcifront_sd which had nothing at that offset: struct pcifront_sd { int domain; /* 0 4 */ /* XXX 4 bytes hole, try to pack */ struct pcifront_device * pdev; /* 8 8 */ } That is an hole - filled with garbage as we used kmalloc instead of kzalloc (the second problem). This patch fixes the issue by: 1) Use kzalloc to initialize to a well known state. 2) Put 'struct pci_sysdata' at the start of 'pcifront_sd'. That way access to the 'node' will access the right offset. Signed-off-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by:
Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
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Konrad Rzeszutek Wilk authored
commit d159457b upstream. Commit 8135cf8b (xen/pciback: Save xen_pci_op commands before processing it) broke enabling MSI-X because it would never copy the resulting vectors into the response. The number of vectors requested was being overwritten by the return value (typically zero for success). Save the number of vectors before processing the op, so the correct number of vectors are copied afterwards. Signed-off-by:
Jan Beulich <jbeulich@suse.com> Signed-off-by:
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Konrad Rzeszutek Wilk authored
commit 8d47065f upstream. Commit 408fb0e5 (xen/pciback: Don't allow MSI-X ops if PCI_COMMAND_MEMORY is not set) prevented enabling MSI-X on passed-through virtual functions, because it checked the VF for PCI_COMMAND_MEMORY but this is not a valid bit for VFs. Instead, check the physical function for PCI_COMMAND_MEMORY. Signed-off-by:
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Luca Coelho authored
commit 5e56276e upstream. The firmware can perform a scheduled scan with not matchsets passed, but it can't send notification that results were found. Since the userspace then cannot know when we got new results and the firmware wouldn't trigger a wake in case we are sleeping, it's better not to allow scans without matchsets. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=110831Signed-off-by:
Luca Coelho <luciano.coelho@intel.com> Signed-off-by:
Emmanuel Grumbach <emmanuel.grumbach@intel.com> [ kamal: backport to 3.19-stable: context ] Signed-off-by:
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Hannes Reinecke authored
commit 2d99b55d upstream. Commit 35dc2483 introduced a check for current->mm to see if we have a user space context and only copies data if we do. Now if an IO gets interrupted by a signal data isn't copied into user space any more (as we don't have a user space context) but user space isn't notified about it. This patch modifies the behaviour to return -EINTR from bio_uncopy_user() to notify userland that a signal has interrupted the syscall, otherwise it could lead to a situation where the caller may get a buffer with no data returned. This can be reproduced by issuing SG_IO ioctl()s in one thread while constantly sending signals to it. Fixes: 35dc2483 [SCSI] sg: Fix user memory corruption when SG_IO is interrupted by a signal Signed-off-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
Hannes Reinecke <hare@suse.de> Signed-off-by:
Jens Axboe <axboe@fb.com> [ luis: backported to 3.16: based on Johannes' backport to 3.14 ] Signed-off-by:
Luis Henriques <luis.henriques@canonical.com> Signed-off-by:
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Eryu Guan authored
commit bcff2488 upstream. I notice ext4/307 fails occasionally on ppc64 host, reporting md5 checksum mismatch after moving data from original file to donor file. The reason is that move_extent_per_page() calls __block_write_begin() and block_commit_write() to write saved data from original inode blocks to donor inode blocks, but __block_write_begin() not only maps buffer heads but also reads block content from disk if the size is not block size aligned. At this time the physical block number in mapped buffer head is pointing to the donor file not the original file, and that results in reading wrong data to page, which get written to disk in following block_commit_write call. This also can be reproduced by the following script on 1k block size ext4 on x86_64 host: mnt=/mnt/ext4 donorfile=$mnt/donor testfile=$mnt/testfile e4compact=~/xfstests/src/e4compact rm -f $donorfile $testfile # reserve space for donor file, written by 0xaa and sync to disk to # avoid EBUSY on EXT4_IOC_MOVE_EXT xfs_io -fc "pwrite -S 0xaa 0 1m" -c "fsync" $donorfile # create test file written by 0xbb xfs_io -fc "pwrite -S 0xbb 0 1023" -c "fsync" $testfile # compute initial md5sum md5sum $testfile | tee md5sum.txt # drop cache, force e4compact to read data from disk echo 3 > /proc/sys/vm/drop_caches # test defrag echo "$testfile" | $e4compact -i -v -f $donorfile # check md5sum md5sum -c md5sum.txt Fix it by creating & mapping buffer heads only but not reading blocks from disk, because all the data in page is guaranteed to be up-to-date in mext_page_mkuptodate(). Signed-off-by:
Eryu Guan <guaneryu@gmail.com> Signed-off-by:
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Insu Yun authored
commit 46901760 upstream. Since sizeof(ext_new_group_data) > sizeof(ext_new_flex_group_data), integer overflow could be happened. Therefore, need to fix integer overflow sanitization. Signed-off-by:
Insu Yun <wuninsu@gmail.com> Signed-off-by:
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James Bottomley authored
commit 90a88d6e upstream. This softlockup is currently happening: [ 444.088002] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/1:1:29] [ 444.088002] Modules linked in: lpfc(-) qla2x00tgt(O) qla2xxx_scst(O) scst_vdisk(O) scsi_transport_fc libcrc32c scst(O) dlm configfs nfsd lockd grace nfs_acl auth_rpcgss sunrpc ed d snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device dm_mod iTCO_wdt snd_hda_codec_realtek snd_hda_codec_generic gpio_ich iTCO_vendor_support ppdev snd_hda_intel snd_hda_codec snd_hda _core snd_hwdep tg3 snd_pcm snd_timer libphy lpc_ich parport_pc ptp acpi_cpufreq snd pps_core fjes parport i2c_i801 ehci_pci tpm_tis tpm sr_mod cdrom soundcore floppy hwmon sg 8250_ fintek pcspkr i915 drm_kms_helper uhci_hcd ehci_hcd drm fb_sys_fops sysimgblt sysfillrect syscopyarea i2c_algo_bit usbcore button video usb_common fan ata_generic ata_piix libata th ermal [ 444.088002] CPU: 1 PID: 29 Comm: kworker/1:1 Tainted: G O 4.4.0-rc5-2.g1e923a3-default #1 [ 444.088002] Hardware name: FUJITSU SIEMENS ESPRIMO E /D2164-A1, BIOS 5.00 R1.10.2164.A1 05/08/2006 [ 444.088002] Workqueue: fc_wq_4 fc_rport_final_delete [scsi_transport_fc] [ 444.088002] task: f6266ec0 ti: f6268000 task.ti: f6268000 [ 444.088002] EIP: 0060:[<c07e7044>] EFLAGS: 00000286 CPU: 1 [ 444.088002] EIP is at _raw_spin_unlock_irqrestore+0x14/0x20 [ 444.088002] EAX: 00000286 EBX: f20d3800 ECX: 00000002 EDX: 00000286 [ 444.088002] ESI: f50ba800 EDI: f2146848 EBP: f6269ec8 ESP: f6269ec8 [ 444.088002] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 444.088002] CR0: 8005003b CR2: 08f96600 CR3: 363ae000 CR4: 000006d0 [ 444.088002] Stack: [ 444.088002] f6269eec c066b0f7 00000286 f2146848 f50ba808 f50ba800 f50ba800 f2146a90 [ 444.088002] f2146848 f6269f08 f8f0a4ed f3141000 f2146800 f2146a90 f619fa00 00000040 [ 444.088002] f6269f40 c026cb25 00000001 166c6392 00000061 f6757140 f6136340 00000004 [ 444.088002] Call Trace: [ 444.088002] [<c066b0f7>] scsi_remove_target+0x167/0x1c0 [ 444.088002] [<f8f0a4ed>] fc_rport_final_delete+0x9d/0x1e0 [scsi_transport_fc] [ 444.088002] [<c026cb25>] process_one_work+0x155/0x3e0 [ 444.088002] [<c026cde7>] worker_thread+0x37/0x490 [ 444.088002] [<c027214b>] kthread+0x9b/0xb0 [ 444.088002] [<c07e72c1>] ret_from_kernel_thread+0x21/0x40 What appears to be happening is that something has pinned the target so it can't go into STARGET_DEL via final release and the loop in scsi_remove_target spins endlessly until that happens. The fix for this soft lockup is to not keep looping over a device that we've called remove on but which hasn't gone into DEL state. This patch will retain a simplistic memory of the last target and not keep looping over it. Reported-by:
Sebastian Herbszt <herbszt@gmx.de> Tested-by:
James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by:
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Ashok Kumar authored
commit 004fa08d upstream. When the GIC is using EOImode==1, the EOI is done immediately, leaving the deactivation to be performed when the EOI was previously done. Unfortunately, the ITS is not aware of the EOImode at all, and blindly EOIs the interrupt again. On most systems, this is ignored (despite being a programming error), but some others do raise a SError exception as there is no priority drop to perform for this interrupt. The fix is to stop trying to be clever, and always call into the underlying GIC to perform the right access, irrespective of the more we're in. [Marc: Reworked commit message] Fixes: 0b996fd3 ("irqchip/GICv3: Convert to EOImode == 1") Acked-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
Ashok Kumar <ashoks@broadcom.com> Signed-off-by:
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David Sterba authored
commit bc4ef759 upstream. The value of ctx->pos in the last readdir call is supposed to be set to INT_MAX due to 32bit compatibility, unless 'pos' is intentially set to a larger value, then it's LLONG_MAX. There's a report from PaX SIZE_OVERFLOW plugin that "ctx->pos++" overflows (https://forums.grsecurity.net/viewtopic.php?f=1&t=4284), on a 64bit arch, where the value is 0x7fffffffffffffff ie. LLONG_MAX before the increment. We can get to that situation like that: * emit all regular readdir entries * still in the same call to readdir, bump the last pos to INT_MAX * next call to readdir will not emit any entries, but will reach the bump code again, finds pos to be INT_MAX and sets it to LLONG_MAX Normally this is not a problem, but if we call readdir again, we'll find 'pos' set to LLONG_MAX and the unconditional increment will overflow. The report from Victor at (http://thread.gmane.org/gmane.comp.file-systems.btrfs/49500) with debugging print shows that pattern: Overflow: e Overflow: 7fffffff Overflow: 7fffffffffffffff PAX: size overflow detected in function btrfs_real_readdir fs/btrfs/inode.c:5760 cicus.935_282 max, count: 9, decl: pos; num: 0; context: dir_context; CPU: 0 PID: 2630 Comm: polkitd Not tainted 4.2.3-grsec #1 Hardware name: Gigabyte Technology Co., Ltd. H81ND2H/H81ND2H, BIOS F3 08/11/2015 ffffffff81901608 0000000000000000 ffffffff819015e6 ffffc90004973d48 ffffffff81742f0f 0000000000000007 ffffffff81901608 ffffc90004973d78 ffffffff811cb706 0000000000000000 ffff8800d47359e0 ffffc90004973ed8 Call Trace: [<ffffffff81742f0f>] dump_stack+0x4c/0x7f [<ffffffff811cb706>] report_size_overflow+0x36/0x40 [<ffffffff812ef0bc>] btrfs_real_readdir+0x69c/0x6d0 [<ffffffff811dafc8>] iterate_dir+0xa8/0x150 [<ffffffff811e6d8d>] ? __fget_light+0x2d/0x70 [<ffffffff811dba3a>] SyS_getdents+0xba/0x1c0 Overflow: 1a [<ffffffff811db070>] ? iterate_dir+0x150/0x150 [<ffffffff81749b69>] entry_SYSCALL_64_fastpath+0x12/0x83 The jump from 7fffffff to 7fffffffffffffff happens when new dir entries are not yet synced and are processed from the delayed list. Then the code could go to the bump section again even though it might not emit any new dir entries from the delayed list. The fix avoids entering the "bump" section again once we've finished emitting the entries, both for synced and delayed entries. References: https://forums.grsecurity.net/viewtopic.php?f=1&t=4284Reported-by:
Victor <services@swwu.com> Signed-off-by:
David Sterba <dsterba@suse.com> Tested-by:
Holger Hoffstätte <holger.hoffstaette@googlemail.com> Signed-off-by:
Chris Mason <clm@fb.com> Signed-off-by:
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Linus Walleij authored
commit e972c374 upstream. Since the dawn of time the ICST code has only supported divide by one or hang in an eternal loop. Luckily we were always dividing by one because the reference frequency for the systems using the ICSTs is 24MHz and the [min,max] values for the PLL input if [10,320] MHz for ICST307 and [6,200] for ICST525, so the loop will always terminate immediately without assigning any divisor for the reference frequency. But for the code to make sense, let's insert the missing i++ Reported-by:
David Binderman <dcb314@hotmail.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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Stefan Haberland authored
commit 9d862aba upstream. Add refcount to the DASD device when a summary unit check worker is scheduled. This prevents that the device is set offline with worker in place. Signed-off-by:
Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Stefan Haberland authored
commit 020bf042 upstream. The channel checks the specified length and the provided amount of data for CCWs and provides an incorrect length error if the size does not match. Under z/VM with simulation activated the length may get changed. Having the suppress length indication bit set is stated as good CCW coding practice and avoids errors under z/VM. Signed-off-by:
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Anton Protopopov authored
commit 4b550af5 upstream. The setup_ntlmv2_rsp() function may return positive value ENOMEM instead of -ENOMEM in case of kmalloc failure. Signed-off-by:
Anton Protopopov <a.s.protopopov@gmail.com> Signed-off-by:
Steve French <smfrench@gmail.com> Signed-off-by:
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Nicolai Hähnle authored
commit f6ff4f67 upstream. An arbitrary amount of time can pass between spin_unlock and radeon_fence_wait_any, so we need to ensure that nobody frees the fences from under us. Based on the analogous fix for amdgpu. Signed-off-by:
Nicolai Hähnle <nicolai.haehnle@amd.com> Reviewed-by:
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Tejun Heo authored
commit d6e022f1 upstream. When looking up the pool_workqueue to use for an unbound workqueue, workqueue assumes that the target CPU is always bound to a valid NUMA node. However, currently, when a CPU goes offline, the mapping is destroyed and cpu_to_node() returns NUMA_NO_NODE. This has always been broken but hasn't triggered often enough before 874bbfe6 ("workqueue: make sure delayed work run in local cpu"). After the commit, workqueue forcifully assigns the local CPU for delayed work items without explicit target CPU to fix a different issue. This widens the window where CPU can go offline while a delayed work item is pending causing delayed work items dispatched with target CPU set to an already offlined CPU. The resulting NUMA_NO_NODE mapping makes workqueue try to queue the work item on a NULL pool_workqueue and thus crash. While 874bbfe6 has been reverted for a different reason making the bug less visible again, it can still happen. Fix it by mapping NUMA_NO_NODE to the default pool_workqueue from unbound_pwq_by_node(). This is a temporary workaround. The long term solution is keeping CPU -> NODE mapping stable across CPU off/online cycles which is being worked on. Signed-off-by:
Tejun Heo <tj@kernel.org> Reported-by:
Mike Galbraith <umgwanakikbuti@gmail.com> Cc: Tang Chen <tangchen@cn.fujitsu.com> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: Len Brown <len.brown@intel.com> Link: http://lkml.kernel.org/g/1454424264.11183.46.camel@gmail.com Link: http://lkml.kernel.org/g/1453702100-2597-1-git-send-email-tangchen@cn.fujitsu.com [ luis: backported to 3.16: adjusted context ] Signed-off-by:
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Alexandra Yates authored
commit 342decff upstream. Adding Intel codename DNV platform device IDs for SATA. Signed-off-by:
Alexandra Yates <alexandra.yates@linux.intel.com> Signed-off-by:
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Rasmus Villemoes authored
commit ed3f9fd1 upstream. This fails to undo the setup for pin==0; moreover, something interesting happens if the setup failed already at pin==0. Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1455048677-19882-3-git-send-email-linux@rasmusvillemoes.dk (cherry picked from commit 2417c8c0) Signed-off-by:
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Lyude authored
commit 3d849b02 upstream. We don't actually check for INTEL_OUTPUT_DP_MST at all in here, as a result we skip assigning a DPLL to any DP MST ports, which makes link training fail: [ 1442.933896] [drm:intel_power_well_enable] enabling DDI D power well [ 1442.933905] [drm:skl_set_power_well] Enabling DDI D power well [ 1442.933957] [drm:intel_mst_pre_enable_dp] 0 [ 1442.935474] [drm:intel_dp_set_signal_levels] Using signal levels 00000000 [ 1442.935477] [drm:intel_dp_set_signal_levels] Using vswing level 0 [ 1442.935480] [drm:intel_dp_set_signal_levels] Using pre-emphasis level 0 [ 1442.936190] [drm:intel_dp_set_signal_levels] Using signal levels 05000000 [ 1442.936193] [drm:intel_dp_set_signal_levels] Using vswing level 1 [ 1442.936195] [drm:intel_dp_set_signal_levels] Using pre-emphasis level 1 [ 1442.936858] [drm:intel_dp_set_signal_levels] Using signal levels 08000000 [ 1442.936862] [drm:intel_dp_set_signal_levels] Using vswing level 2 … [ 1442.998253] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up [ 1442.998512] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train DP, aborting After which the pipe state goes completely out of sync: [ 70.075596] [drm:check_crtc_state] [CRTC:25] [ 70.075696] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ddi_pll_sel (expected 0x00000000, found 0x00000001) [ 70.075747] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in shared_dpll (expected -1, found 0) [ 70.075798] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.ctrl1 (expected 0x00000000, found 0x00000021) [ 70.075840] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.cfgcr1 (expected 0x00000000, found 0x80400173) [ 70.075884] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.cfgcr2 (expected 0x00000000, found 0x000003a5) [ 70.075954] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 262750, found 72256) [ 70.075999] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in port_clock (expected 540000, found 148500) And if you're especially lucky, it keeps going downhill: [ 83.309256] Kernel panic - not syncing: Timeout: Not all CPUs entered broadcast exception handler [ 83.309265] [ 83.309265] ================================= [ 83.309266] [ INFO: inconsistent lock state ] [ 83.309267] 4.5.0-rc1Lyude-Test #265 Not tainted [ 83.309267] --------------------------------- [ 83.309268] inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. [ 83.309270] Xorg/1194 [HC0[1]:SC0[0]:HE1:SE1] takes: [ 83.309293] (&(&dev_priv->uncore.lock)->rlock){?.-...}, at: [<ffffffffa02a6073>] gen9_write32+0x63/0x400 [i915] [ 83.309293] {IN-HARDIRQ-W} state was registered at: [ 83.309297] [<ffffffff810e84f4>] __lock_acquire+0x9c4/0x1d00 [ 83.309299] [<ffffffff810ea1be>] lock_acquire+0xce/0x1c0 [ 83.309302] [<ffffffff8177d936>] _raw_spin_lock_irqsave+0x56/0x90 [ 83.309321] [<ffffffffa02a5492>] gen9_read32+0x52/0x3d0 [i915] [ 83.309332] [<ffffffffa024beea>] gen8_irq_handler+0x27a/0x6a0 [i915] [ 83.309337] [<ffffffff810fdbc1>] handle_irq_event_percpu+0x41/0x300 [ 83.309339] [<ffffffff810fdeb9>] handle_irq_event+0x39/0x60 [ 83.309341] [<ffffffff811010b4>] handle_edge_irq+0x74/0x130 [ 83.309344] [<ffffffff81009073>] handle_irq+0x73/0x120 [ 83.309346] [<ffffffff817805f1>] do_IRQ+0x61/0x120 [ 83.309348] [<ffffffff8177e6d6>] ret_from_intr+0x0/0x20 [ 83.309351] [<ffffffff815f5105>] cpuidle_enter_state+0x105/0x330 [ 83.309353] [<ffffffff815f5367>] cpuidle_enter+0x17/0x20 [ 83.309356] [<ffffffff810dbe1a>] call_cpuidle+0x2a/0x50 [ 83.309358] [<ffffffff810dc1dd>] cpu_startup_entry+0x26d/0x3a0 [ 83.309360] [<ffffffff817701da>] rest_init+0x13a/0x140 [ 83.309363] [<ffffffff81f2af8e>] start_kernel+0x475/0x482 [ 83.309365] [<ffffffff81f2a315>] x86_64_start_reservations+0x2a/0x2c [ 83.309367] [<ffffffff81f2a452>] x86_64_start_kernel+0x13b/0x14a Fixes: 82d35437 ("drm/i915/skl: Implementation of SKL DPLL programming") Signed-off-by:
Lyude <cpaul@redhat.com> Signed-off-by:
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Tony Lindgren authored
commit b241d31e upstream. Otherwise rmmod omap2430; rmmod phy-twl4030-usb; modprobe omap2430 will try to use a non-existing phy and oops: Unable to handle kernel paging request at virtual address b6f7c1f0 ... [<c048a284>] (devm_usb_get_phy_by_node) from [<bf0758ac>] (omap2430_musb_init+0x44/0x2b4 [omap2430]) [<bf0758ac>] (omap2430_musb_init [omap2430]) from [<bf055ec0>] (musb_init_controller+0x194/0x878 [musb_hdrc]) Cc: Bin Liu <b-liu@ti.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: NeilBrown <neil@brown.name> Signed-off-by:
Tony Lindgren <tony@atomide.com> Signed-off-by:
Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by:
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