- 13 Jun, 2017 4 commits
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Matt Redfearn authored
[ Upstream commit 510d8636 ] The SAVE_SOME macro is used to save the execution context on all exceptions. If an exception occurs while executing user code, the stack is switched to the kernel's stack for the current task, and register $28 is switched to point to the current_thread_info, which is at the bottom of the stack region. If the exception occurs while executing kernel code, the stack is left, and this change ensures that register $28 is not updated. This is the correct behaviour when the kernel can be executing on the separate irq stack, because the thread_info will not be at the base of it. With this change, register $28 is only switched to it's kernel conventional usage of the currrent thread info pointer at the point at which execution enters kernel space. Doing it on every exception was redundant, but OK without an IRQ stack, but will be erroneous once that is introduced. Signed-off-by:
Matt Redfearn <matt.redfearn@imgtec.com> Acked-by:
Jason A. Donenfeld <jason@zx2c4.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: James Hogan <james.hogan@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14742/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
Sasha Levin <alexander.levin@verizon.com>
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Rafał Miłecki authored
[ Upstream commit bd5d2131 ] After parsing TRX we should skip to the first block placed behind it. Our code was working only with TRX with length not aligned to the blocksize. In other cases (length aligned) it was missing the block places right after TRX. This fixes calculation and simplifies the comment. Signed-off-by:
Rafał Miłecki <rafal@milecki.pl> Signed-off-by:
Brian Norris <computersforpeace@gmail.com> Signed-off-by:
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Janusz Dziedzic authored
[ Upstream commit de288e36 ] In the case of bounced ep0 requests, we must delay DMA operation until after ->complete() otherwise we might overwrite contents of req->buf. This caused problems with RNDIS gadget. Signed-off-by:
Janusz Dziedzic <januszx.dziedzic@intel.com> Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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Chris Salls authored
[ Upstream commit cf01fb99 ] In the case that compat_get_bitmap fails we do not want to copy the bitmap to the user as it will contain uninitialized stack data and leak sensitive data. Signed-off-by:
Chris Salls <salls@cs.ucsb.edu> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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- 08 Jun, 2017 36 commits
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Yisheng Xie authored
[ Upstream commit 70feee0e ] Kefeng reported that when running the follow test, the mlock count in meminfo will increase permanently: [1] testcase linux:~ # cat test_mlockal grep Mlocked /proc/meminfo for j in `seq 0 10` do for i in `seq 4 15` do ./p_mlockall >> log & done sleep 0.2 done # wait some time to let mlock counter decrease and 5s may not enough sleep 5 grep Mlocked /proc/meminfo linux:~ # cat p_mlockall.c #include <sys/mman.h> #include <stdlib.h> #include <stdio.h> #define SPACE_LEN 4096 int main(int argc, char ** argv) { int ret; void *adr = malloc(SPACE_LEN); if (!adr) return -1; ret = mlockall(MCL_CURRENT | MCL_FUTURE); printf("mlcokall ret = %d\n", ret); ret = munlockall(); printf("munlcokall ret = %d\n", ret); free(adr); return 0; } In __munlock_pagevec() we should decrement NR_MLOCK for each page where we clear the PageMlocked flag. Commit 1ebb7cc6 ("mm: munlock: batch NR_MLOCK zone state updates") has introduced a bug where we don't decrement NR_MLOCK for pages where we clear the flag, but fail to isolate them from the lru list (e.g. when the pages are on some other cpu's percpu pagevec). Since PageMlocked stays cleared, the NR_MLOCK accounting gets permanently disrupted by this. Fix it by counting the number of page whose PageMlock flag is cleared. Fixes: 1ebb7cc6 (" mm: munlock: batch NR_MLOCK zone state updates") Link: http://lkml.kernel.org/r/1495678405-54569-1-git-send-email-xieyisheng1@huawei.comSigned-off-by:
Yisheng Xie <xieyisheng1@huawei.com> Reported-by:
Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Naoya Horiguchi authored
[ Upstream commit ead07f6a ] memory_failure() can run in 2 different mode (specified by MF_COUNT_INCREASED) in page refcount perspective. When MF_COUNT_INCREASED is set, memory_failure() assumes that the caller takes a refcount of the target page. And if cleared, memory_failure() takes it in it's own. In current code, however, refcounting is done differently in each caller. For example, madvise_hwpoison() uses get_user_pages_fast() and hwpoison_inject() uses get_page_unless_zero(). So this inconsistent refcounting causes refcount failure especially for thp tail pages. Typical user visible effects are like memory leak or VM_BUG_ON_PAGE(!page_count(page)) in isolate_lru_page(). To fix this refcounting issue, this patch introduces get_hwpoison_page() to handle thp tail pages in the same manner for each caller of hwpoison code. memory_failure() might fail to split thp and in such case it returns without completing page isolation. This is not good because PageHWPoison on the thp is still set and there's no easy way to unpoison such thps. So this patch try to roll back any action to the thp in "non anonymous thp" case and "thp split failed" case, expecting an MCE(SRAR) generated by later access afterward will properly free such thps. [akpm@linux-foundation.org: fix CONFIG_HWPOISON_INJECT=m] Signed-off-by:
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Tony Luck <tony.luck@intel.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Signed-off-by:
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Naoya Horiguchi authored
[ Upstream commit 415c64c1 ] memory_failure() doesn't handle thp itself at this time and need to split it before doing isolation. Currently thp is split in the middle of hwpoison_user_mappings(), but there're corner cases where memory_failure() wrongly tries to handle thp without splitting. 1) "non anonymous" thp, which is not a normal operating mode of thp, but a memory error could hit a thp before anon_vma is initialized. In such case, split_huge_page() fails and me_huge_page() (intended for hugetlb) is called for thp, which triggers BUG_ON in page_hstate(). 2) !PageLRU case, where hwpoison_user_mappings() returns with SWAP_SUCCESS and the result is the same as case 1. memory_failure() can't avoid splitting, so let's split it more earlier, which also reduces code which are prepared for both of normal page and thp. Signed-off-by:
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Thomas Gleixner authored
[ Upstream commit 478fe303 ] memcg_propagate_slab_attrs() abuses the sysfs attribute file functions to propagate settings from the root kmem_cache to a newly created kmem_cache. It does that with: attr->show(root, buf); attr->store(new, buf, strlen(bug); Aside of being a lazy and absurd hackery this is broken because it does not check the return value of the show() function. Some of the show() functions return 0 w/o touching the buffer. That means in such a case the store function is called with the stale content of the previous show(). That causes nonsense like invoking kmem_cache_shrink() on a newly created kmem_cache. In the worst case it would cause handing in an uninitialized buffer. This should be rewritten proper by adding a propagate() callback to those slub_attributes which must be propagated and avoid that insane conversion to and from ASCII, but that's too large for a hot fix. Check at least the return value of the show() function, so calling store() with stale content is prevented. Steven said: "It can cause a deadlock with get_online_cpus() that has been uncovered by recent cpu hotplug and lockdep changes that Thomas and Peter have been doing. Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(cpu_hotplug.lock); lock(slab_mutex); lock(cpu_hotplug.lock); lock(slab_mutex); *** DEADLOCK ***" Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1705201244540.2255@nanosSigned-off-by:
Thomas Gleixner <tglx@linutronix.de> Reported-by:
Steven Rostedt <rostedt@goodmis.org> Acked-by:
David Rientjes <rientjes@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: <stable@vger.kernel.org> Signed-off-by:
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Tejun Heo authored
[ Upstream commit 994b7832 ] When blkcg_init_queue() fails midway after creating a new blkg, it performs kfree() directly; however, this doesn't free the policy data areas. Make it use blkg_free() instead. In turn, blkg_free() is updated to handle root request_list special case. While this fixes a possible memory leak, it's on an unlikely failure path of an already cold path and the size leaked per occurrence is miniscule too. I don't think it needs to be tagged for -stable. Signed-off-by:
Tejun Heo <tj@kernel.org> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by:
Jens Axboe <axboe@fb.com> Signed-off-by:
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Tejun Heo authored
[ Upstream commit ec13b1d6 ] Currently, blkcg does a minor optimization where the root blkcg is created when the first blkcg policy is activated on a queue and destroyed on the deactivation of the last. On systems where blkcg is configured but not used, this saves one blkcg_gq struct per queue. On systems where blkcg is actually used, there's no difference. The only case where this can lead to any meaninful, albeit still minute, save in memory consumption is when all blkcg policies are deactivated after being widely used in the system, which is a hihgly unlikely scenario. The conditional existence of root blkcg_gq has already created several bugs in blkcg and became an issue once again for the new per-cgroup wb_congested mechanism for cgroup writeback support leading to a NULL dereference when no blkcg policy is active. This is really not worth bothering with. This patch makes blkcg always allocate and link the root blkcg_gq and release it only on queue destruction. Signed-off-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
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Herbert Xu authored
[ Upstream commit 69110e3c ] This patch replaces uses of the long obsolete hash interface with either shash (for non-SG users) or ahash. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Alexei Potashnik authored
[ Upstream commit aa75679c ] Current implementation assumes that all the buffers of an IO are linked with a single SG list, which is OK because target-core is only allocating a contigious scatterlist region. However, this assumption is wrong for se_cmd descriptors that want to use chaining across multiple SGL regions. Fix this up by using proper SGL accessors for digest payload computation. Signed-off-by:
Alexei Potashnik <alexei@purestorage.com> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by:
Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by:
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Nicholas Bellinger authored
[ Upstream commit 25cdda95 ] This patch fixes a OOPs originally introduced by: commit bb048357 Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Thu Sep 5 14:54:04 2013 -0700 iscsi-target: Add sk->sk_state_change to cleanup after TCP failure which would trigger a NULL pointer dereference when a TCP connection was closed asynchronously via iscsi_target_sk_state_change(), but only when the initial PDU processing in iscsi_target_do_login() from iscsi_np process context was blocked waiting for backend I/O to complete. To address this issue, this patch makes the following changes. First, it introduces some common helper functions used for checking socket closing state, checking login_flags, and atomically checking socket closing state + setting login_flags. Second, it introduces a LOGIN_FLAGS_INITIAL_PDU bit to know when a TCP connection has dropped via iscsi_target_sk_state_change(), but the initial PDU processing within iscsi_target_do_login() in iscsi_np context is still running. For this case, it sets LOGIN_FLAGS_CLOSED, but doesn't invoke schedule_delayed_work(). The original NULL pointer dereference case reported by MNC is now handled by iscsi_target_do_login() doing a iscsi_target_sk_check_close() before transitioning to FFP to determine when the socket has already closed, or iscsi_target_start_negotiation() if the login needs to exchange more PDUs (eg: iscsi_target_do_login returned 0) but the socket has closed. For both of these cases, the cleanup up of remaining connection resources will occur in iscsi_target_start_negotiation() from iscsi_np process context once the failure is detected. Finally, to handle to case where iscsi_target_sk_state_change() is called after the initial PDU procesing is complete, it now invokes conn->login_work -> iscsi_target_do_login_rx() to perform cleanup once existing iscsi_target_sk_check_close() checks detect connection failure. For this case, the cleanup of remaining connection resources will occur in iscsi_target_do_login_rx() from delayed workqueue process context once the failure is detected. Reported-by:
Mike Christie <mchristi@redhat.com> Reviewed-by:
Hannes Reinecke <hare@suse.com> Cc: Hannes Reinecke <hare@suse.com> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: Varun Prakash <varun@chelsio.com> Cc: <stable@vger.kernel.org> # v3.12+ Signed-off-by:
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Bart Van Assche authored
[ Upstream commit 1efaa949 ] This patch avoids that smatch complains about inconsistent indentation in iscsi_target_start_negotiation(). Signed-off-by:
Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Cc: Nicholas A. Bellinger <nab@linux-iscsi.org> Signed-off-by:
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Nicholas Bellinger authored
[ Upstream commit 8f0dfb3d ] There is a iscsi-target/tcp login race in LOGIN_FLAGS_READY state assignment that can result in frequent errors during iscsi discovery: "iSCSI Login negotiation failed." To address this bug, move the initial LOGIN_FLAGS_READY assignment ahead of iscsi_target_do_login() when handling the initial iscsi_target_start_negotiation() request PDU during connection login. As iscsi_target_do_login_rx() work_struct callback is clearing LOGIN_FLAGS_READ_ACTIVE after subsequent calls to iscsi_target_do_login(), the early sk_data_ready ahead of the first iscsi_target_do_login() expects LOGIN_FLAGS_READY to also be set for the initial login request PDU. As reported by Maged, this was first obsered using an MSFT initiator running across multiple VMWare host virtual machines with iscsi-target/tcp. Reported-by:
Maged Mokhtar <mmokhtar@binarykinetics.com> Tested-by:
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David Arcari authored
[ Upstream commit 6c770036 ] For a driver that does not set the CPUFREQ_STICKY flag, if all of the ->init() calls fail, cpufreq_register_driver() should return an error. This will prevent the driver from loading. Fixes: ce1bcfe9 (cpufreq: check cpufreq_policy_list instead of scanning policies for all CPUs) Cc: 4.0+ <stable@vger.kernel.org> # 4.0+ Signed-off-by:
David Arcari <darcari@redhat.com> Acked-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Eric Anholt authored
[ Upstream commit 43523eba ] Without this, polling on the dma-buf (and presumably other devices synchronizing against our rendering) would return immediately, even while the BO was busy. Signed-off-by:
Eric Anholt <eric@anholt.net> Reviewed-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Cc: stable@vger.kernel.org Cc: Rob Clark <robdclark@gmail.com> Cc: linux-arm-msm@vger.kernel.org Cc: freedreno@lists.freedesktop.org Reviewed-by:
Rob Clark <robdclark@gmail.com> Signed-off-by:
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Jan Kara authored
[ Upstream commit 5375023a ] XFS SEEK_HOLE implementation could miss a hole in an unwritten extent as can be seen by the following command: xfs_io -c "falloc 0 256k" -c "pwrite 0 56k" -c "pwrite 128k 8k" -c "seek -h 0" file wrote 57344/57344 bytes at offset 0 56 KiB, 14 ops; 0.0000 sec (49.312 MiB/sec and 12623.9856 ops/sec) wrote 8192/8192 bytes at offset 131072 8 KiB, 2 ops; 0.0000 sec (70.383 MiB/sec and 18018.0180 ops/sec) Whence Result HOLE 139264 Where we can see that hole at offset 56k was just ignored by SEEK_HOLE implementation. The bug is in xfs_find_get_desired_pgoff() which does not properly detect the case when pages are not contiguous. Fix the problem by properly detecting when found page has larger offset than expected. CC: stable@vger.kernel.org Fixes: d126d43fSigned-off-by:
Jan Kara <jack@suse.cz> Reviewed-by:
Brian Foster <bfoster@redhat.com> Reviewed-by:
Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by:
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Eryu Guan authored
[ Upstream commit 8affebe1 ] xfs_find_get_desired_pgoff() is used to search for offset of hole or data in page range [index, end] (both inclusive), and the max number of pages to search should be at least one, if end == index. Otherwise the only page is missed and no hole or data is found, which is not correct. When block size is smaller than page size, this can be demonstrated by preallocating a file with size smaller than page size and writing data to the last block. E.g. run this xfs_io command on a 1k block size XFS on x86_64 host. # xfs_io -fc "falloc 0 3k" -c "pwrite 2k 1k" \ -c "seek -d 0" /mnt/xfs/testfile wrote 1024/1024 bytes at offset 2048 1 KiB, 1 ops; 0.0000 sec (33.675 MiB/sec and 34482.7586 ops/sec) Whence Result DATA EOF Data at offset 2k was missed, and lseek(2) returned ENXIO. This is uncovered by generic/285 subtest 07 and 08 on ppc64 host, where pagesize is 64k. Because a recent change to generic/285 reduced the preallocated file size to smaller than 64k. Cc: stable@vger.kernel.org # v3.7+ Signed-off-by:
Eryu Guan <eguan@redhat.com> Reviewed-by:
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Lyude authored
[ Upstream commit 3d18e337 ] We end up reading the interrupt register for HPD5, and then writing it to HPD6 which on systems without anything using HPD5 results in permanently disabling hotplug on one of the display outputs after the first time we acknowledge a hotplug interrupt from the GPU. This code is really bad. But for now, let's just fix this. I will hopefully have a large patch series to refactor all of this soon. Reviewed-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
Lyude <lyude@redhat.com> Cc: stable@vger.kernel.org Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Alexander Sverdlin authored
[ Upstream commit 98f9de36 ] Draining the transfers in terminate_all callback happens with IRQs disabled, therefore induces huge latency: irqsoff latency trace v1.1.5 on 4.11.0 -------------------------------------------------------------------- latency: 39770 us, #57/57, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0) ----------------- | task: process-129 (uid:0 nice:0 policy:2 rt_prio:50) ----------------- => started at: _snd_pcm_stream_lock_irqsave => ended at: snd_pcm_stream_unlock_irqrestore _------=> CPU# / _-----=> irqs-off | / _----=> need-resched || / _---=> hardirq/softirq ||| / _--=> preempt-depth |||| / delay cmd pid ||||| time | caller \ / ||||| \ | / process-129 0d.s. 3us : _snd_pcm_stream_lock_irqsave process-129 0d.s1 9us : snd_pcm_stream_lock <-_snd_pcm_stream_lock_irqsave process-129 0d.s1 15us : preempt_count_add <-snd_pcm_stream_lock process-129 0d.s2 22us : preempt_count_add <-snd_pcm_stream_lock process-129 0d.s3 32us : snd_pcm_update_hw_ptr0 <-snd_pcm_period_elapsed process-129 0d.s3 41us : soc_pcm_pointer <-snd_pcm_update_hw_ptr0 process-129 0d.s3 50us : dmaengine_pcm_pointer <-soc_pcm_pointer process-129 0d.s3 58us+: snd_dmaengine_pcm_pointer_no_residue <-dmaengine_pcm_pointer process-129 0d.s3 96us : update_audio_tstamp <-snd_pcm_update_hw_ptr0 process-129 0d.s3 103us : snd_pcm_update_state <-snd_pcm_update_hw_ptr0 process-129 0d.s3 112us : xrun <-snd_pcm_update_state process-129 0d.s3 119us : snd_pcm_stop <-xrun process-129 0d.s3 126us : snd_pcm_action <-snd_pcm_stop process-129 0d.s3 134us : snd_pcm_action_single <-snd_pcm_action process-129 0d.s3 141us : snd_pcm_pre_stop <-snd_pcm_action_single process-129 0d.s3 150us : snd_pcm_do_stop <-snd_pcm_action_single process-129 0d.s3 157us : soc_pcm_trigger <-snd_pcm_do_stop process-129 0d.s3 166us : snd_dmaengine_pcm_trigger <-soc_pcm_trigger process-129 0d.s3 175us : ep93xx_dma_terminate_all <-snd_dmaengine_pcm_trigger process-129 0d.s3 182us : preempt_count_add <-ep93xx_dma_terminate_all process-129 0d.s4 189us*: m2p_hw_shutdown <-ep93xx_dma_terminate_all process-129 0d.s4 39472us : m2p_hw_setup <-ep93xx_dma_terminate_all ... rest skipped... process-129 0d.s. 40080us : <stack trace> => ep93xx_dma_tasklet => tasklet_action => __do_softirq => irq_exit => __handle_domain_irq => vic_handle_irq => __irq_usr => 0xb66c6668 Just abort the transfers and warn if the HW state is not what we expect. Move draining into device_synchronize callback. Signed-off-by:
Alexander Sverdlin <alexander.sverdlin@gmail.com> Cc: stable@vger.kernel.org Signed-off-by:
Vinod Koul <vinod.koul@intel.com> Signed-off-by:
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Alexander Sverdlin authored
[ Upstream commit 0037ae47 ] The current buffer is being reset to zero on device_free_chan_resources() but not on device_terminate_all(). It could happen that HW is restarted and expects BASE0 to be used, but the driver is not synchronized and will start from BASE1. One solution is to reset the buffer explicitly in m2p_hw_setup(). Signed-off-by:
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Patrik Jakobsson authored
[ Upstream commit 82bc9a42 ] With LVDS we were incorrectly picking the pre-programmed mode instead of the prefered mode provided by VBT. Make sure we pick the VBT mode if one is provided. It is likely that the mode read-out code is still wrong but this patch fixes the immediate problem on most machines. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78562 Cc: <stable@vger.kernel.org> Signed-off-by:
Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170418114332.12183-1-patrik.r.jakobsson@gmail.comSigned-off-by:
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Rafael J. Wysocki authored
[ Upstream commit 2cef548a ] Commit bac2a909 (PCI / PM: Avoid resuming PCI devices during system suspend) introduced a mechanism by which some PCI devices that were runtime-suspended at the system suspend time might be left in that state for the duration of the system suspend-resume cycle. However, it overlooked devices that were marked as capable of waking up the system just because PME support was detected in their PCI config space. Namely, in that case, device_can_wakeup(dev) returns 'true' for the device and if the device is not configured for system wakeup, device_may_wakeup(dev) returns 'false' and it will be resumed during system suspend even though configuring it for system wakeup may not really make sense at all. To avoid this problem, simply disable PME for PCI devices that have not been configured for system wakeup and are runtime-suspended at the system suspend time for the duration of the suspend-resume cycle. If the device is in D3cold, its config space is not available and it shouldn't be written to, but that's only possible if the device has platform PM support and the platform code is responsible for checking whether or not the device's configuration is suitable for system suspend in that case. Signed-off-by:
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Tadeusz Struk authored
[ Upstream commit 3388a614 ] The PCI capabilities list for Intel DH895xCC VFs (device id 0x0443) with QuickAssist Technology is prematurely terminated in hardware. Workaround the issue by hard-coding the known expected next capability pointer and saving the PCIE cap into internal buffer. Patch generated against cryptodev-2.6 Signed-off-by:
Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by:
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Alexander Tsoy authored
[ Upstream commit 1fc2e41f ] This model is actually called 92XXM2-8 in Windows driver. But since pin configs for M22 and M28 are identical, just reuse M22 quirk. Fixes external microphone (tested) and probably docking station ports (not tested). Signed-off-by:
Alexander Tsoy <alexander@tsoy.me> Cc: <stable@vger.kernel.org> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Srinath Mannam authored
[ Upstream commit f5f968f2 ] The stingray SDHCI hardware supports ACMD12 and automatically issues after multi block transfer completed. If ACMD12 in SDHCI is disabled, spurious tx done interrupts are seen on multi block read command with below error message: Got data interrupt 0x00000002 even though no data operation was in progress. This patch uses SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 to enable ACM12 support in SDHCI hardware and suppress spurious interrupt. Signed-off-by:
Srinath Mannam <srinath.mannam@broadcom.com> Reviewed-by:
Ray Jui <ray.jui@broadcom.com> Reviewed-by:
Scott Branden <scott.branden@broadcom.com> Acked-by:
Adrian Hunter <adrian.hunter@intel.com> Fixes: b580c52d ("mmc: sdhci-iproc: add IPROC SDHCI driver") Cc: <stable@vger.kernel.org> Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
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Sebastian Reichel authored
[ Upstream commit 5165da59 ] Since v4.9 i2c-tiny-usb generates the below call trace and longer works, since it can't communicate with the USB device. The reason is, that since v4.9 the USB stack checks, that the buffer it should transfer is DMA capable. This was a requirement since v2.2 days, but it usually worked nevertheless. [ 17.504959] ------------[ cut here ]------------ [ 17.505488] WARNING: CPU: 0 PID: 93 at drivers/usb/core/hcd.c:1587 usb_hcd_map_urb_for_dma+0x37c/0x570 [ 17.506545] transfer buffer not dma capable [ 17.507022] Modules linked in: [ 17.507370] CPU: 0 PID: 93 Comm: i2cdetect Not tainted 4.11.0-rc8+ #10 [ 17.508103] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 17.509039] Call Trace: [ 17.509320] ? dump_stack+0x5c/0x78 [ 17.509714] ? __warn+0xbe/0xe0 [ 17.510073] ? warn_slowpath_fmt+0x5a/0x80 [ 17.510532] ? nommu_map_sg+0xb0/0xb0 [ 17.510949] ? usb_hcd_map_urb_for_dma+0x37c/0x570 [ 17.511482] ? usb_hcd_submit_urb+0x336/0xab0 [ 17.511976] ? wait_for_completion_timeout+0x12f/0x1a0 [ 17.512549] ? wait_for_completion_timeout+0x65/0x1a0 [ 17.513125] ? usb_start_wait_urb+0x65/0x160 [ 17.513604] ? usb_control_msg+0xdc/0x130 [ 17.514061] ? usb_xfer+0xa4/0x2a0 [ 17.514445] ? __i2c_transfer+0x108/0x3c0 [ 17.514899] ? i2c_transfer+0x57/0xb0 [ 17.515310] ? i2c_smbus_xfer_emulated+0x12f/0x590 [ 17.515851] ? _raw_spin_unlock_irqrestore+0x11/0x20 [ 17.516408] ? i2c_smbus_xfer+0x125/0x330 [ 17.516876] ? i2c_smbus_xfer+0x125/0x330 [ 17.517329] ? i2cdev_ioctl_smbus+0x1c1/0x2b0 [ 17.517824] ? i2cdev_ioctl+0x75/0x1c0 [ 17.518248] ? do_vfs_ioctl+0x9f/0x600 [ 17.518671] ? vfs_write+0x144/0x190 [ 17.519078] ? SyS_ioctl+0x74/0x80 [ 17.519463] ? entry_SYSCALL_64_fastpath+0x1e/0xad [ 17.519959] ---[ end trace d047c04982f5ac50 ]--- Cc: <stable@vger.kernel.org> Signed-off-by:
Sebastian Reichel <sebastian.reichel@collabora.co.uk> Reviewed-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by:
Till Harbaum <till@harbaum.org> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Signed-off-by:
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Chen, Gong authored
[ Upstream commit 061120ae ] An MCE is a rare event. Therefore, there's no need to have per-CPU instances of both normal and IRQ workqueues. Make them both global. Signed-off-by:
Chen, Gong <gong.chen@linux.intel.com> [ Fold in subsequent patch from Rui/Boris/Tony for early boot logging. ] Signed-off-by:
Tony Luck <tony.luck@intel.com> [ Massage commit message. ] Signed-off-by:
Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1439396985-12812-4-git-send-email-bp@alien8.deSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Al Viro authored
[ Upstream commit a8c39544 ] failing sys_wait4() won't fill struct rusage... Cc: stable@vger.kernel.org Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Wanpeng Li authored
[ Upstream commit cbfc6c91 ] Huawei folks reported a read out-of-bounds vulnerability in kvm pio emulation. - "inb" instruction to access PIT Mod/Command register (ioport 0x43, write only, a read should be ignored) in guest can get a random number. - "rep insb" instruction to access PIT register port 0x43 can control memcpy() in emulator_pio_in_emulated() to copy max 0x400 bytes but only read 1 bytes, which will disclose the unimportant kernel memory in host but no crash. The similar test program below can reproduce the read out-of-bounds vulnerability: void hexdump(void *mem, unsigned int len) { unsigned int i, j; for(i = 0; i < len + ((len % HEXDUMP_COLS) ? (HEXDUMP_COLS - len % HEXDUMP_COLS) : 0); i++) { /* print offset */ if(i % HEXDUMP_COLS == 0) { printf("0x%06x: ", i); } /* print hex data */ if(i < len) { printf("%02x ", 0xFF & ((char*)mem)[i]); } else /* end of block, just aligning for ASCII dump */ { printf(" "); } /* print ASCII dump */ if(i % HEXDUMP_COLS == (HEXDUMP_COLS - 1)) { for(j = i - (HEXDUMP_COLS - 1); j <= i; j++) { if(j >= len) /* end of block, not really printing */ { putchar(' '); } else if(isprint(((char*)mem)[j])) /* printable char */ { putchar(0xFF & ((char*)mem)[j]); } else /* other char */ { putchar('.'); } } putchar('\n'); } } } int main(void) { int i; if (iopl(3)) { err(1, "set iopl unsuccessfully\n"); return -1; } static char buf[0x40]; /* test ioport 0x40,0x41,0x42,0x43,0x44,0x45 */ memset(buf, 0xab, sizeof(buf)); asm volatile("push %rdi;"); asm volatile("mov %0, %%rdi;"::"q"(buf)); asm volatile ("mov $0x40, %rdx;"); asm volatile ("in %dx,%al;"); asm volatile ("stosb;"); asm volatile ("mov $0x41, %rdx;"); asm volatile ("in %dx,%al;"); asm volatile ("stosb;"); asm volatile ("mov $0x42, %rdx;"); asm volatile ("in %dx,%al;"); asm volatile ("stosb;"); asm volatile ("mov $0x43, %rdx;"); asm volatile ("in %dx,%al;"); asm volatile ("stosb;"); asm volatile ("mov $0x44, %rdx;"); asm volatile ("in %dx,%al;"); asm volatile ("stosb;"); asm volatile ("mov $0x45, %rdx;"); asm volatile ("in %dx,%al;"); asm volatile ("stosb;"); asm volatile ("pop %rdi;"); hexdump(buf, 0x40); printf("\n"); /* ins port 0x40 */ memset(buf, 0xab, sizeof(buf)); asm volatile("push %rdi;"); asm volatile("mov %0, %%rdi;"::"q"(buf)); asm volatile ("mov $0x20, %rcx;"); asm volatile ("mov $0x40, %rdx;"); asm volatile ("rep insb;"); asm volatile ("pop %rdi;"); hexdump(buf, 0x40); printf("\n"); /* ins port 0x43 */ memset(buf, 0xab, sizeof(buf)); asm volatile("push %rdi;"); asm volatile("mov %0, %%rdi;"::"q"(buf)); asm volatile ("mov $0x20, %rcx;"); asm volatile ("mov $0x43, %rdx;"); asm volatile ("rep insb;"); asm volatile ("pop %rdi;"); hexdump(buf, 0x40); printf("\n"); return 0; } The vcpu->arch.pio_data buffer is used by both in/out instrutions emulation w/o clear after using which results in some random datas are left over in the buffer. Guest reads port 0x43 will be ignored since it is write only, however, the function kernel_pio() can't distigush this ignore from successfully reads data from device's ioport. There is no new data fill the buffer from port 0x43, however, emulator_pio_in_emulated() will copy the stale data in the buffer to the guest unconditionally. This patch fixes it by clearing the buffer before in instruction emulation to avoid to grant guest the stale data in the buffer. In addition, string I/O is not supported for in kernel device. So there is no iteration to read ioport %RCX times for string I/O. The function kernel_pio() just reads one round, and then copy the io size * %RCX to the guest unconditionally, actually it copies the one round ioport data w/ other random datas which are left over in the vcpu->arch.pio_data buffer to the guest. This patch fixes it by introducing the string I/O support for in kernel device in order to grant the right ioport datas to the guest. Before the patch: 0x000000: fe 38 93 93 ff ff ab ab .8...... 0x000008: ab ab ab ab ab ab ab ab ........ 0x000010: ab ab ab ab ab ab ab ab ........ 0x000018: ab ab ab ab ab ab ab ab ........ 0x000020: ab ab ab ab ab ab ab ab ........ 0x000028: ab ab ab ab ab ab ab ab ........ 0x000030: ab ab ab ab ab ab ab ab ........ 0x000038: ab ab ab ab ab ab ab ab ........ 0x000000: f6 00 00 00 00 00 00 00 ........ 0x000008: 00 00 00 00 00 00 00 00 ........ 0x000010: 00 00 00 00 4d 51 30 30 ....MQ00 0x000018: 30 30 20 33 20 20 20 20 00 3 0x000020: ab ab ab ab ab ab ab ab ........ 0x000028: ab ab ab ab ab ab ab ab ........ 0x000030: ab ab ab ab ab ab ab ab ........ 0x000038: ab ab ab ab ab ab ab ab ........ 0x000000: f6 00 00 00 00 00 00 00 ........ 0x000008: 00 00 00 00 00 00 00 00 ........ 0x000010: 00 00 00 00 4d 51 30 30 ....MQ00 0x000018: 30 30 20 33 20 20 20 20 00 3 0x000020: ab ab ab ab ab ab ab ab ........ 0x000028: ab ab ab ab ab ab ab ab ........ 0x000030: ab ab ab ab ab ab ab ab ........ 0x000038: ab ab ab ab ab ab ab ab ........ After the patch: 0x000000: 1e 02 f8 00 ff ff ab ab ........ 0x000008: ab ab ab ab ab ab ab ab ........ 0x000010: ab ab ab ab ab ab ab ab ........ 0x000018: ab ab ab ab ab ab ab ab ........ 0x000020: ab ab ab ab ab ab ab ab ........ 0x000028: ab ab ab ab ab ab ab ab ........ 0x000030: ab ab ab ab ab ab ab ab ........ 0x000038: ab ab ab ab ab ab ab ab ........ 0x000000: d2 e2 d2 df d2 db d2 d7 ........ 0x000008: d2 d3 d2 cf d2 cb d2 c7 ........ 0x000010: d2 c4 d2 c0 d2 bc d2 b8 ........ 0x000018: d2 b4 d2 b0 d2 ac d2 a8 ........ 0x000020: ab ab ab ab ab ab ab ab ........ 0x000028: ab ab ab ab ab ab ab ab ........ 0x000030: ab ab ab ab ab ab ab ab ........ 0x000038: ab ab ab ab ab ab ab ab ........ 0x000000: 00 00 00 00 00 00 00 00 ........ 0x000008: 00 00 00 00 00 00 00 00 ........ 0x000010: 00 00 00 00 00 00 00 00 ........ 0x000018: 00 00 00 00 00 00 00 00 ........ 0x000020: ab ab ab ab ab ab ab ab ........ 0x000028: ab ab ab ab ab ab ab ab ........ 0x000030: ab ab ab ab ab ab ab ab ........ 0x000038: ab ab ab ab ab ab ab ab ........ Reported-by:
Moguofang <moguofang@huawei.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Moguofang <moguofang@huawei.com> Signed-off-by:
Wanpeng Li <wanpeng.li@hotmail.com> Cc: stable@vger.kernel.org Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 46c319b8 ] Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
Johan Hovold <johan@kernel.org> Reviewed-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
Wim Van Sebroeck <wim@iguana.be> Signed-off-by:
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Julius Werner authored
[ Upstream commit b299cde2 ] /dev/mem currently allows mmap() mappings that wrap around the end of the physical address space, which should probably be illegal. It circumvents the existing STRICT_DEVMEM permission check because the loop immediately terminates (as the start address is already higher than the end address). On the x86_64 architecture it will then cause a panic (from the BUG(start >= end) in arch/x86/mm/pat.c:reserve_memtype()). This patch adds an explicit check to make sure offset + size will not wrap around in the physical address type. Signed-off-by:
Julius Werner <jwerner@chromium.org> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Lucas Stach authored
[ Upstream commit 88e2582e ] With serdev we might end up with serial ports that have no cdev exported to userspace, as they are used as the bus interface to other devices. In that case serial_match_port() won't be able to find a matching tty_dev. Skip the irq wakeup enabling in that case, as serdev will make sure to keep the port active, as long as there are devices depending on it. Fixes: 8ee3fde0 (tty_port: register tty ports with serdev bus) Signed-off-by:
Lucas Stach <l.stach@pengutronix.de> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Peter Hurley authored
[ Upstream commit 9ce119f3 ] A line discipline which does not define a receive_buf() method can can cause a GPF if data is ever received [1]. Oddly, this was known to the author of n_tracesink in 2011, but never fixed. [1] GPF report BUG: unable to handle kernel NULL pointer dereference at (null) IP: [< (null)>] (null) PGD 3752d067 PUD 37a7b067 PMD 0 Oops: 0010 [#1] SMP KASAN Modules linked in: CPU: 2 PID: 148 Comm: kworker/u10:2 Not tainted 4.4.0-rc2+ #51 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: events_unbound flush_to_ldisc task: ffff88006da94440 ti: ffff88006db60000 task.ti: ffff88006db60000 RIP: 0010:[<0000000000000000>] [< (null)>] (null) RSP: 0018:ffff88006db67b50 EFLAGS: 00010246 RAX: 0000000000000102 RBX: ffff88003ab32f88 RCX: 0000000000000102 RDX: 0000000000000000 RSI: ffff88003ab330a6 RDI: ffff88003aabd388 RBP: ffff88006db67c48 R08: ffff88003ab32f9c R09: ffff88003ab31fb0 R10: ffff88003ab32fa8 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff88006db67c20 R14: ffffffff863df820 R15: ffff88003ab31fb8 FS: 0000000000000000(0000) GS:ffff88006dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000000 CR3: 0000000037938000 CR4: 00000000000006e0 Stack: ffffffff829f46f1 ffff88006da94bf8 ffff88006da94bf8 0000000000000000 ffff88003ab31fb0 ffff88003aabd438 ffff88003ab31ff8 ffff88006430fd90 ffff88003ab32f9c ffffed0007557a87 1ffff1000db6cf78 ffff88003ab32078 Call Trace: [<ffffffff8127cf91>] process_one_work+0x8f1/0x17a0 kernel/workqueue.c:2030 [<ffffffff8127df14>] worker_thread+0xd4/0x1180 kernel/workqueue.c:2162 [<ffffffff8128faaf>] kthread+0x1cf/0x270 drivers/block/aoe/aoecmd.c:1302 [<ffffffff852a7c2f>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 Code: Bad RIP value. RIP [< (null)>] (null) RSP <ffff88006db67b50> CR2: 0000000000000000 ---[ end trace a587f8947e54d6ea ]--- Reported-by:
Dmitry Vyukov <dvyukov@google.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Peter Hurley <peter@hurleysoftware.com> Signed-off-by:
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Dmitry Vyukov authored
[ Upstream commit 7098296a ] flush_to_ldisc reads port->itty and checks that it is not NULL, concurrently release_tty sets port->itty to NULL. It is possible that flush_to_ldisc loads port->itty once, ensures that it is not NULL, but then reloads it again and uses. The second load can already return NULL, which will cause a crash. Use READ_ONCE to read port->itty. The data race was found with KernelThreadSanitizer (KTSAN). Signed-off-by:
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Johan Hovold authored
[ Upstream commit 1e948479 ] Make sure to deregister the SPI driver before releasing the tty driver to avoid use-after-free in the SPI remove callback where the tty devices are deregistered. Fixes: 72d4724e ("serial: ifx6x60: Add modem power off function in the platform reboot process") Cc: stable <stable@vger.kernel.org> # 3.8 Cc: Jun Chen <jun.d.chen@intel.com> Signed-off-by:
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Geert Uytterhoeven authored
[ Upstream commit 9a499db0 ] Casting spi_driver pointers to "void *" when calling spi_{,un}register_driver() bypasses all type checking. Remove the superfluous casts to fix this. Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit d3ba126a ] This reverts commit 8ee3fde0. The new serdev bus hooked into the tty layer in tty_port_register_device() by registering a serdev controller instead of a tty device whenever a serdev client is present, and by deregistering the controller in the tty-port destructor. This is broken in several ways: Firstly, it leads to a NULL-pointer dereference whenever a tty driver later deregisters its devices as no corresponding character device will exist. Secondly, far from every tty driver uses tty-port refcounting (e.g. serial core) so the serdev devices might never be deregistered or deallocated. Thirdly, deregistering at tty-port destruction is too late as the underlying device and structures may be long gone by then. A port is not released before an open tty device is closed, something which a registered serdev client can prevent from ever happening. A driver callback while the device is gone typically also leads to crashes. Many tty drivers even keep their ports around until the driver is unloaded (e.g. serial core), something which even if a late callback never happens, leads to leaks if a device is unbound from its driver and is later rebound. The right solution here is to add a new tty_port_unregister_device() helper and to never call tty_device_unregister() whenever the port has been claimed by serdev, but since this requires modifying just about every tty driver (and multiple subsystems) it will need to be done incrementally. Reverting the offending patch is the first step in fixing the broken lifetime assumptions. A follow-up patch will add a new pair of tty-device registration helpers, which a vetted tty driver can use to support serdev (initially serial core). When every tty driver uses the serdev helpers (at least for deregistration), we can add serdev registration to tty_port_register_device() again. Note that this also fixes another issue with serdev, which currently allocates and registers a serdev controller for every tty device registered using tty_port_device_register() only to immediately deregister and deallocate it when the corresponding OF node or serdev child node is missing. This should be addressed before enabling serdev for hot-pluggable buses. Signed-off-by:
Rob Herring <robh@kernel.org> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Rob Herring authored
[ Upstream commit 8ee3fde0 ] Register a serdev controller with the serdev bus when a tty_port is registered. This creates the serdev controller and create's serdev devices for any DT child nodes of the tty_port's parent (i.e. the UART device). Signed-off-by:
Sebastian Reichel <sre@kernel.org> Tested-By:
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