- 17 Dec, 2019 40 commits
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Johan Hovold authored
commit 11609a7e upstream. If a process is interrupted while accessing the video device and the device lock is contended, release() could return early and fail to free related resources. Note that the return value of the v4l2 release file operation is ignored. Fixes: 28ffeebb ("[media] bdisp: 2D blitter driver using v4l2 mem2mem framework") Cc: stable <stable@vger.kernel.org> # 4.2 Signed-off-by:
Johan Hovold <johan@kernel.org> Reviewed-by:
Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by:
Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by:
Mauro Carvalho Chehab <mchehab@kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Gerald Schaefer authored
commit ab874f22 upstream. On older HW or under a hypervisor, w/o the instruction-execution- protection (IEP) facility, and also w/o EDAT-1, a translation-specification exception may be recognized when bit 55 of a pte is one (_PAGE_NOEXEC). The current code tries to prevent setting _PAGE_NOEXEC in such cases, by removing it within set_pte_at(). However, ptep_set_access_flags() will modify a pte directly, w/o using set_pte_at(). There is at least one scenario where this can result in an active pte with _PAGE_NOEXEC set, which would then lead to a panic due to a translation-specification exception (write to swapped out page): do_swap_page pte = mk_pte (with _PAGE_NOEXEC bit) set_pte_at (will remove _PAGE_NOEXEC bit in page table, but keep it in local variable pte) vmf->orig_pte = pte (pte still contains _PAGE_NOEXEC bit) do_wp_page wp_page_reuse entry = vmf->orig_pte (still with _PAGE_NOEXEC bit) ptep_set_access_flags (writes entry with _PAGE_NOEXEC bit) Fix this by clearing _PAGE_NOEXEC already in mk_pte_phys(), where the pgprot value is applied, so that no pte with _PAGE_NOEXEC will ever be visible, if it is not supported. The check in set_pte_at() can then also be removed. Cc: <stable@vger.kernel.org> # 4.11+ Fixes: 57d7f939 ("s390: add no-execute support") Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
Vasily Gorbik <gor@linux.ibm.com> Signed-off-by:
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Denis Efremov authored
commit 315cee42 upstream. memcpy() call with "idata == NULL && ilen == 0" results in undefined behavior in ar5523_cmd(). For example, NULL is passed in callchain "ar5523_stat_work() -> ar5523_cmd_write() -> ar5523_cmd()". This patch adds ilen check before memcpy() call in ar5523_cmd() to prevent an undefined behavior. Cc: Pontus Fuchs <pontus.fuchs@gmail.com> Cc: Kalle Valo <kvalo@codeaurora.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: David Laight <David.Laight@ACULAB.COM> Cc: stable@vger.kernel.org Signed-off-by:
Denis Efremov <efremov@linux.com> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
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Aleksa Sarai authored
commit a713af39 upstream. Because pids->limit can be changed concurrently (but we don't want to take a lock because it would be needlessly expensive), use atomic64_ts instead. Fixes: commit 49b786ea ("cgroup: implement the PIDs subsystem") Cc: stable@vger.kernel.org # v4.3+ Signed-off-by:
Aleksa Sarai <cyphar@cyphar.com> Signed-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Ming Lei authored
commit 8962842c upstream. It is reported that sysfs buffer overflow can be triggered if the system has too many CPU cores(>841 on 4K PAGE_SIZE) when showing CPUs of hctx via /sys/block/$DEV/mq/$N/cpu_list. Use snprintf to avoid the potential buffer overflow. This version doesn't change the attribute format, and simply stops showing CPU numbers if the buffer is going to overflow. Cc: stable@vger.kernel.org Fixes: 676141e4("blk-mq: don't dump CPU -> hw queue map on driver load") Signed-off-by:
Ming Lei <ming.lei@redhat.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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David Jeffery authored
commit 775d7831 upstream. If pers->make_request fails in md_flush_request(), the bio is lost. To fix this, pass back a bool to indicate if the original make_request call should continue to handle the I/O and instead of assuming the flush logic will push it to completion. Convert md_flush_request to return a bool and no longer calls the raid driver's make_request function. If the return is true, then the md flush logic has or will complete the bio and the md make_request call is done. If false, then the md make_request function needs to keep processing like it is a normal bio. Let the original call to md_handle_request handle any need to retry sending the bio to the raid driver's make_request function should it be needed. Also mark md_flush_request and the make_request function pointer as __must_check to issue warnings should these critical return values be ignored. Fixes: 2bc13b83 ("md: batch flush requests.") Cc: stable@vger.kernel.org # # v4.19+ Cc: NeilBrown <neilb@suse.com> Signed-off-by:
David Jeffery <djeffery@redhat.com> Reviewed-by:
Xiao Ni <xni@redhat.com> Signed-off-by:
Song Liu <songliubraving@fb.com> Signed-off-by:
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Pawel Harlozinski authored
commit 8f157d4f upstream. Check for existance of jack before tracing. NULL pointer dereference has been reported by KASAN while unloading machine driver (snd_soc_cnl_rt274). Signed-off-by:
Pawel Harlozinski <pawel.harlozinski@linux.intel.com> Link: https://lore.kernel.org/r/20191112130237.10141-1-pawel.harlozinski@linux.intel.comSigned-off-by:
Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org Signed-off-by:
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Jacob Rasmussen authored
commit fe23be2d upstream. Had a typo in e7cfd867 that resulted in buddy jack support not being fixed. Fixes: e7cfd867 ("ASoC: rt5645: Fixed buddy jack support.") Signed-off-by:
Jacob Rasmussen <jacobraz@google.com> Reviewed-by:
Ross Zwisler <zwisler@google.com> Cc: <jacobraz@google.com> CC: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191114232011.165762-1-jacobraz@google.comSigned-off-by:
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Jacob Rasmussen authored
commit e7cfd867 upstream. The headphone jack on buddy was broken with the following commit: commit 6b5da663 ("ASoC: rt5645: read jd1_1 status for jd detection"). This changes the jd_mode for buddy to 4 so buddy can read from the same register that was used in the working version of this driver without affecting any other devices that might use this, since no other device uses jd_mode = 4. To test this I plugged and uplugged the headphone jack, verifying audio works. Signed-off-by:
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Tejun Heo authored
commit e66b39af upstream. 008847f6 ("workqueue: allow rescuer thread to do more work.") made the rescuer worker requeue the pwq immediately if there may be more work items which need rescuing instead of waiting for the next mayday timer expiration. Unfortunately, it doesn't check whether the pwq is already on the mayday list and unconditionally gets the ref and moves it onto the list. This doesn't corrupt the list but creates an additional reference to the pwq. It got queued twice but will only be removed once. This leak later can trigger pwq refcnt warning on workqueue destruction and prevent freeing of the workqueue. Signed-off-by:
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Tejun Heo authored
commit def98c84 upstream. Before actually destrying a workqueue, destroy_workqueue() checks whether it's actually idle. If it isn't, it prints out a bunch of warning messages and leaves the workqueue dangling. It unfortunately has a couple issues. * Mayday list queueing increments pwq's refcnts which gets detected as busy and fails the sanity checks. However, because mayday list queueing is asynchronous, this condition can happen without any actual work items left in the workqueue. * Sanity check failure leaves the sysfs interface behind too which can lead to init failure of newer instances of the workqueue. This patch fixes the above two by * If a workqueue has a rescuer, disable and kill the rescuer before sanity checks. Disabling and killing is guaranteed to flush the existing mayday list. * Remove sysfs interface before sanity checks. Signed-off-by:
Marcin Pawlowski <mpawlowski@fb.com> Reported-by:
"Williams, Gerald S" <gerald.s.williams@intel.com> Cc: stable@vger.kernel.org Signed-off-by:
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Dmitry Fomichev authored
commit e7fad909 upstream. Commit 75d66ffb added backing device health checks and as a part of these checks, check_events() block ops template call is invoked in dm-zoned mapping path as well as in reclaim and flush path. Calling check_events() with ATA or SCSI backing devices introduces a blocking scsi_test_unit_ready() call being made in sd_check_events(). Even though the overhead of calling scsi_test_unit_ready() is small for ATA zoned devices, it is much larger for SCSI and it affects performance in a very negative way. Fix this performance regression by executing check_events() only in case of any I/O errors. The function dmz_bdev_is_dying() is modified to call only blk_queue_dying(), while calls to check_events() are made in a new helper function, dmz_check_bdev(). Reported-by:
zhangxiaoxu <zhangxiaoxu5@huawei.com> Fixes: 75d66ffb ("dm zoned: properly handle backing device failure") Cc: stable@vger.kernel.org Signed-off-by:
Dmitry Fomichev <dmitry.fomichev@wdc.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Maged Mokhtar authored
commit c1005322 upstream. Call writecache_flush() on REQ_FUA in writecache_map(). Cc: stable@vger.kernel.org # 4.18+ Signed-off-by:
Maged Mokhtar <mmokhtar@petasan.org> Acked-by:
Mikulas Patocka <mpatocka@redhat.com> Signed-off-by:
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Sumit Garg authored
commit be867f98 upstream. Existing RNG data read timeout is 200us but it doesn't cover EIP76 RNG data rate which takes approx. 700us to produce 16 bytes of output data as per testing results. So configure the timeout as 1000us to also take account of lack of udelay()'s reliability. Fixes: 38321242 ("hwrng: omap - Add device variant for SafeXcel IP-76 found in Armada 8K") Cc: <stable@vger.kernel.org> Signed-off-by:
Sumit Garg <sumit.garg@linaro.org> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Amir Goldstein authored
commit 6889ee5a upstream. In ovl_rename(), if new upper is hardlinked to old upper underneath overlayfs before upper dirs are locked, user will get an ESTALE error and a WARN_ON will be printed. Changes to underlying layers while overlayfs is mounted may result in unexpected behavior, but it shouldn't crash the kernel and it shouldn't trigger WARN_ON() either, so relax this WARN_ON(). Reported-by: syzbot+bb1836a212e69f8e201a@syzkaller.appspotmail.com Fixes: 804032fa ("ovl: don't check rename to self") Cc: <stable@vger.kernel.org> # v4.9+ Signed-off-by:
Amir Goldstein <amir73il@gmail.com> Signed-off-by:
Miklos Szeredi <mszeredi@redhat.com> Signed-off-by:
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Amir Goldstein authored
commit 9c6d8f13 upstream. On non-samefs overlay without xino, non pure upper inodes should use a pseudo_dev assigned to each unique lower fs and pure upper inodes use the real upper st_dev. It is fine for an overlay pure upper inode to use the same st_dev;st_ino values as the real upper inode, because the content of those two different filesystem objects is always the same. In this case, however: - two filesystems, A and B - upper layer is on A - lower layer 1 is also on A - lower layer 2 is on B Non pure upper overlay inode, whose origin is in layer 1 will have the same st_dev;st_ino values as the real lower inode. This may result with a false positive results of 'diff' between the real lower and copied up overlay inode. Fix this by using the upper st_dev;st_ino values in this case. This breaks the property of constant st_dev;st_ino across copy up of this case. This breakage will be fixed by a later patch. Fixes: 5148626b ("ovl: allocate anon bdev per unique lower fs") Cc: stable@vger.kernel.org # v4.17+ Signed-off-by:
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Greg Kroah-Hartman authored
commit 702600ee upstream. Newer versions of awk spit out these fun warnings: awk: ../lib/raid6/unroll.awk:16: warning: regexp escape sequence `\#' is not a known regexp operator As commit 700c1018 ("x86/insn: Fix awk regexp warnings") showed, it turns out that there are a number of awk strings that do not need to be escaped and newer versions of awk now warn about this. Fix the string up so that no warning is produced. The exact same kernel module gets created before and after this patch, showing that it wasn't needed. Link: https://lore.kernel.org/r/20191206152600.GA75093@kroah.comSigned-off-by:
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Larry Finger authored
commit 330bb711 upstream. In commit 38506ece ("rtlwifi: rtl_pci: Start modification for new drivers"), the flag that indicates that interrupts are enabled was never set. In addition, there are several places when enable/disable interrupts were commented out are restored. A sychronize_interrupts() call is removed. Fixes: 38506ece ("rtlwifi: rtl_pci: Start modification for new drivers") Cc: Stable <stable@vger.kernel.org> # v3.18+ Signed-off-by:
Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by:
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Larry Finger authored
commit 3155db76 upstream. In commit 38506ece ("rtlwifi: rtl_pci: Start modification for new drivers"), a callback needed to check if the hardware has released a buffer indicating that a DMA operation is completed was not added. Fixes: 38506ece ("rtlwifi: rtl_pci: Start modification for new drivers") Cc: Stable <stable@vger.kernel.org> # v3.18+ Signed-off-by:
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Larry Finger authored
commit 0e531cc5 upstream. In commit 38506ece ("rtlwifi: rtl_pci: Start modification for new drivers"), a callback to get the RX buffer address was added to the PCI driver. Unfortunately, driver rtl8192de was not modified appropriately and the code runs into a WARN_ONCE() call. The use of an incorrect array is also fixed. Fixes: 38506ece ("rtlwifi: rtl_pci: Start modification for new drivers") Cc: Stable <stable@vger.kernel.org> # 3.18+ Signed-off-by:
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Josef Bacik authored
commit 3e174099 upstream. Testing with the new fsstress support for subvolumes uncovered a pretty bad problem with rename exchange on subvolumes. We're modifying two different subvolumes, but we only start the transaction on one of them, so the other one is not added to the dirty root list. This is caught by btrfs_cow_block() with a warning because the root has not been updated, however if we do not modify this root again we'll end up pointing at an invalid root because the root item is never updated. Fix this by making sure we add the destination root to the trans list, the same as we do with normal renames. This fixes the corruption. Fixes: cdd1fedf ("btrfs: add support for RENAME_EXCHANGE and RENAME_WHITEOUT") CC: stable@vger.kernel.org # 4.9+ Reviewed-by:
Filipe Manana <fdmanana@suse.com> Signed-off-by:
Josef Bacik <josef@toxicpanda.com> Signed-off-by:
David Sterba <dsterba@suse.com> Signed-off-by:
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Filipe Manana authored
commit fd0ddbe2 upstream. Backreference walking, which is used by send to figure if it can issue clone operations instead of write operations, can be very slow and use too much memory when extents have many references. This change simply skips backreference walking when an extent has more than 64 references, in which case we fallback to a write operation instead of a clone operation. This limit is conservative and in practice I observed no signicant slowdown with up to 100 references and still low memory usage up to that limit. This is a temporary workaround until there are speedups in the backref walking code, and as such it does not attempt to add extra interfaces or knobs to tweak the threshold. Reported-by:
Atemu <atemu.main@gmail.com> Link: https://lore.kernel.org/linux-btrfs/CAE4GHgkvqVADtS4AzcQJxo0Q1jKQgKaW3JGp3SGdoinVo=C9eQ@mail.gmail.com/T/#me55dc0987f9cc2acaa54372ce0492c65782be3fa CC: stable@vger.kernel.org # 4.4+ Reviewed-by:
Qu Wenruo <wqu@suse.com> Signed-off-by:
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Qu Wenruo authored
commit 34b127ae upstream. The last user of btrfs_bio::flags was removed in commit 326e1dbb ("block: remove management of bi_remaining when restoring original bi_end_io"), remove it. (Tagged for stable as the structure is heavily used and space savings are desirable.) CC: stable@vger.kernel.org # 4.4+ Signed-off-by:
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Tejun Heo authored
commit f7bddf1e upstream. During a cyclic writeback, extent_write_cache_pages() uses done_index to update the writeback_index after the current run is over. However, instead of current index + 1, it gets to to the current index itself. Unfortunately, this, combined with returning on EOF instead of looping back, can lead to the following pathlogical behavior. 1. There is a single file which has accumulated enough dirty pages to trigger balance_dirty_pages() and the writer appending to the file with a series of short writes. 2. balance_dirty_pages kicks in, wakes up background writeback and sleeps. 3. Writeback kicks in and the cursor is on the last page of the dirty file. Writeback is started or skipped if already in progress. As it's EOF, extent_write_cache_pages() returns and the cursor is set to done_index which is pointing to the last page. 4. Writeback is done. Nothing happens till balance_dirty_pages finishes, at which point we go back to #1. This can almost completely stall out writing back of the file and keep the system over dirty threshold for a long time which can mess up the whole system. We encountered this issue in production with a package handling application which can reliably reproduce the issue when running under tight memory limits. Reading the comment in the error handling section, this seems to be to avoid accidentally skipping a page in case the write attempt on the page doesn't succeed. However, this concern seems bogus. On each page, the code either: * Skips and moves onto the next page. * Fails issue and sets done_index to index + 1. * Successfully issues and continue to the next page if budget allows and not EOF. IOW, as long as it's not EOF and there's budget, the code never retries writing back the same page. Only when a page happens to be the last page of a particular run, we end up retrying the page, which can't possibly guarantee anything data integrity related. Besides, cyclic writes are only used for non-syncing writebacks meaning that there's no data integrity implication to begin with. Fix it by always setting done_index past the current page being processed. Note that this problem exists in other writepages too. CC: stable@vger.kernel.org # 4.19+ Signed-off-by:
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Filipe Manana authored
commit a0e248bb upstream. When doing a buffered write it's possible to leave the subv_writers counter of the root, used for synchronization between buffered nocow writers and snapshotting. This happens in an exceptional case like the following: 1) We fail to allocate data space for the write, since there's not enough available data space nor enough unallocated space for allocating a new data block group; 2) Because of that failure, we try to go to NOCOW mode, which succeeds and therefore we set the local variable 'only_release_metadata' to true and set the root's sub_writers counter to 1 through the call to btrfs_start_write_no_snapshotting() made by check_can_nocow(); 3) The call to btrfs_copy_from_user() returns zero, which is very unlikely to happen but not impossible; 4) No pages are copied because btrfs_copy_from_user() returned zero; 5) We call btrfs_end_write_no_snapshotting() which decrements the root's subv_writers counter to 0; 6) We don't set 'only_release_metadata' back to 'false' because we do it only if 'copied', the value returned by btrfs_copy_from_user(), is greater than zero; 7) On the next iteration of the while loop, which processes the same page range, we are now able to allocate data space for the write (we got enough data space released in the meanwhile); 8) After this if we fail at btrfs_delalloc_reserve_metadata(), because now there isn't enough free metadata space, or in some other place further below (prepare_pages(), lock_and_cleanup_extent_if_need(), btrfs_dirty_pages()), we break out of the while loop with 'only_release_metadata' having a value of 'true'; 9) Because 'only_release_metadata' is 'true' we end up decrementing the root's subv_writers counter to -1 (through a call to btrfs_end_write_no_snapshotting()), and we also end up not releasing the data space previously reserved through btrfs_check_data_free_space(). As a consequence the mechanism for synchronizing NOCOW buffered writes with snapshotting gets broken. Fix this by always setting 'only_release_metadata' to false at the start of each iteration. Fixes: 8257b2dc ("Btrfs: introduce btrfs_{start, end}_nocow_write() for each subvolume") Fixes: 7ee9e440 ("Btrfs: check if we can nocow if we don't have data space") CC: stable@vger.kernel.org # 4.4+ Reviewed-by:
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Filipe Manana authored
commit 53687007 upstream. In the fixup worker, if we fail to mark the range as delalloc in the io tree, we must release the previously reserved metadata, as well as update the outstanding extents counter for the inode, otherwise we leak metadata space. In pratice we can't return an error from btrfs_set_extent_delalloc(), which is just a wrapper around __set_extent_bit(), as for most errors __set_extent_bit() does a BUG_ON() (or panics which hits a BUG_ON() as well) and returning an -EEXIST error doesn't happen in this case since the exclusive bits parameter always has a value of 0 through this code path. Nevertheless, just fix the error handling in the fixup worker, in case one day __set_extent_bit() can return an error to this code path. Fixes: f3038ee3 ("btrfs: Handle btrfs_set_extent_delalloc failure in fixup worker") CC: stable@vger.kernel.org # 4.19+ Reviewed-by:
Nikolay Borisov <nborisov@suse.com> Signed-off-by:
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Josef Bacik authored
commit baf320b9 upstream. We hit the following warning while running down a different problem [ 6197.175850] ------------[ cut here ]------------ [ 6197.185082] refcount_t: underflow; use-after-free. [ 6197.194704] WARNING: CPU: 47 PID: 966 at lib/refcount.c:190 refcount_sub_and_test_checked+0x53/0x60 [ 6197.521792] Call Trace: [ 6197.526687] __btrfs_release_delayed_node+0x76/0x1c0 [ 6197.536615] btrfs_kill_all_delayed_nodes+0xec/0x130 [ 6197.546532] ? __btrfs_btree_balance_dirty+0x60/0x60 [ 6197.556482] btrfs_clean_one_deleted_snapshot+0x71/0xd0 [ 6197.566910] cleaner_kthread+0xfa/0x120 [ 6197.574573] kthread+0x111/0x130 [ 6197.581022] ? kthread_create_on_node+0x60/0x60 [ 6197.590086] ret_from_fork+0x1f/0x30 [ 6197.597228] ---[ end trace 424bb7ae00509f56 ]--- This is because the free side drops the ref without the lock, and then takes the lock if our refcount is 0. So you can have nodes on the tree that have a refcount of 0. Fix this by zero'ing out that element in our temporary array so we don't try to kill it again. CC: stable@vger.kernel.org # 4.14+ Reviewed-by:
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Josef Bacik authored
commit 3797136b upstream. While testing 5.2 we ran into the following panic [52238.017028] BUG: kernel NULL pointer dereference, address: 0000000000000001 [52238.105608] RIP: 0010:drop_buffers+0x3d/0x150 [52238.304051] Call Trace: [52238.308958] try_to_free_buffers+0x15b/0x1b0 [52238.317503] shrink_page_list+0x1164/0x1780 [52238.325877] shrink_inactive_list+0x18f/0x3b0 [52238.334596] shrink_node_memcg+0x23e/0x7d0 [52238.342790] ? do_shrink_slab+0x4f/0x290 [52238.350648] shrink_node+0xce/0x4a0 [52238.357628] balance_pgdat+0x2c7/0x510 [52238.365135] kswapd+0x216/0x3e0 [52238.371425] ? wait_woken+0x80/0x80 [52238.378412] ? balance_pgdat+0x510/0x510 [52238.386265] kthread+0x111/0x130 [52238.392727] ? kthread_create_on_node+0x60/0x60 [52238.401782] ret_from_fork+0x1f/0x30 The page we were trying to drop had a page->private, but had no page->mapping and so called drop_buffers, assuming that we had a buffer_head on the page, and then panic'ed trying to deref 1, which is our page->private for data pages. This is happening because we're truncating the free space cache while we're trying to load the free space cache. This isn't supposed to happen, and I'll fix that in a followup patch. However we still shouldn't allow those sort of mistakes to result in messing with pages that do not belong to us. So add the page->mapping check to verify that we still own this page after dropping and re-acquiring the page lock. This page being unlocked as: btrfs_readpage extent_read_full_page __extent_read_full_page __do_readpage if (!nr) unlock_page <-- nr can be 0 only if submit_extent_page returns an error CC: stable@vger.kernel.org # 4.4+ Reviewed-by:
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Yoshihiro Shimoda authored
commit 4bd5ead8 upstream. Since the role_store() uses strncmp(), it's possible to refer out-of-memory if the sysfs data size is smaller than strlen("host"). This patch fixes it by using sysfs_streq() instead of strncmp(). Reported-by:
Pavel Machek <pavel@denx.de> Fixes: 9bb86777 ("phy: rcar-gen3-usb2: add sysfs for usb role swap") Cc: <stable@vger.kernel.org> # v4.10+ Signed-off-by:
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by:
Geert Uytterhoeven <geert+renesas@glider.be> Acked-by:
Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by:
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Thinh Nguyen authored
commit 2d7b78f5 upstream. Clear ep0's DWC3_EP_TRANSFER_STARTED flag if the END_TRANSFER command is completed. Otherwise, we can't start control transfer again after END_TRANSFER. Cc: stable@vger.kernel.org Signed-off-by:
Thinh Nguyen <thinhn@synopsys.com> Signed-off-by:
Felipe Balbi <balbi@kernel.org> Signed-off-by:
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Tejas Joglekar authored
commit 8c7d4b7b upstream. This patch corrects the condition to kick the transfer without giving back the requests when either request has remaining data or when there are pending SGs. The && check was introduced during spliting up the dwc3_gadget_ep_cleanup_completed_requests() function. Fixes: f38e35dd ("usb: dwc3: gadget: split dwc3_gadget_ep_cleanup_completed_requests()") Cc: stable@vger.kernel.org Signed-off-by:
Tejas Joglekar <joglekar@synopsys.com> Signed-off-by:
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Heikki Krogerus authored
commit 3c3caae4 upstream. The original ID that was added for Comet Lake PCH was actually for the -LP (low power) variant even though the constant for it said CMLH. Changing that while at it. Signed-off-by:
Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by:
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David Hildenbrand authored
commit 63341ab0 upstream. In case we have to migrate a ballon page to a newpage of another zone, the managed page count of both zones is wrong. Paired with memory offlining (which will adjust the managed page count), we can trigger kernel crashes and all kinds of different symptoms. One way to reproduce: 1. Start a QEMU guest with 4GB, no NUMA 2. Hotplug a 1GB DIMM and online the memory to ZONE_NORMAL 3. Inflate the balloon to 1GB 4. Unplug the DIMM (be quick, otherwise unmovable data ends up on it) 5. Observe /proc/zoneinfo Node 0, zone Normal pages free 16810 min 24848885473806 low 18471592959183339 high 36918337032892872 spanned 262144 present 262144 managed 18446744073709533486 6. Do anything that requires some memory (e.g., inflate the balloon some more). The OOM goes crazy and the system crashes [ 238.324946] Out of memory: Killed process 537 (login) total-vm:27584kB, anon-rss:860kB, file-rss:0kB, shmem-rss:00 [ 238.338585] systemd invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0 [ 238.339420] CPU: 0 PID: 1 Comm: systemd Tainted: G D W 5.4.0-next-20191204+ #75 [ 238.340139] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu4 [ 238.341121] Call Trace: [ 238.341337] dump_stack+0x8f/0xd0 [ 238.341630] dump_header+0x61/0x5ea [ 238.341942] oom_kill_process.cold+0xb/0x10 [ 238.342299] out_of_memory+0x24d/0x5a0 [ 238.342625] __alloc_pages_slowpath+0xd12/0x1020 [ 238.343024] __alloc_pages_nodemask+0x391/0x410 [ 238.343407] pagecache_get_page+0xc3/0x3a0 [ 238.343757] filemap_fault+0x804/0xc30 [ 238.344083] ? ext4_filemap_fault+0x28/0x42 [ 238.344444] ext4_filemap_fault+0x30/0x42 [ 238.344789] __do_fault+0x37/0x1a0 [ 238.345087] __handle_mm_fault+0x104d/0x1ab0 [ 238.345450] handle_mm_fault+0x169/0x360 [ 238.345790] do_user_addr_fault+0x20d/0x490 [ 238.346154] do_page_fault+0x31/0x210 [ 238.346468] async_page_fault+0x43/0x50 [ 238.346797] RIP: 0033:0x7f47eba4197e [ 238.347110] Code: Bad RIP value. [ 238.347387] RSP: 002b:00007ffd7c0c1890 EFLAGS: 00010293 [ 238.347834] RAX: 0000000000000002 RBX: 000055d196a20a20 RCX: 00007f47eba4197e [ 238.348437] RDX: 0000000000000033 RSI: 00007ffd7c0c18c0 RDI: 0000000000000004 [ 238.349047] RBP: 00007ffd7c0c1c20 R08: 0000000000000000 R09: 0000000000000033 [ 238.349660] R10: 00000000ffffffff R11: 0000000000000293 R12: 0000000000000001 [ 238.350261] R13: ffffffffffffffff R14: 0000000000000000 R15: 00007ffd7c0c18c0 [ 238.350878] Mem-Info: [ 238.351085] active_anon:3121 inactive_anon:51 isolated_anon:0 [ 238.351085] active_file:12 inactive_file:7 isolated_file:0 [ 238.351085] unevictable:0 dirty:0 writeback:0 unstable:0 [ 238.351085] slab_reclaimable:5565 slab_unreclaimable:10170 [ 238.351085] mapped:3 shmem:111 pagetables:155 bounce:0 [ 238.351085] free:720717 free_pcp:2 free_cma:0 [ 238.353757] Node 0 active_anon:12484kB inactive_anon:204kB active_file:48kB inactive_file:28kB unevictable:0kB iss [ 238.355979] Node 0 DMA free:11556kB min:36kB low:48kB high:60kB reserved_highatomic:0KB active_anon:152kB inactivB [ 238.358345] lowmem_reserve[]: 0 2955 2884 2884 2884 [ 238.358761] Node 0 DMA32 free:2677864kB min:7004kB low:10028kB high:13052kB reserved_highatomic:0KB active_anon:0B [ 238.361202] lowmem_reserve[]: 0 0 72057594037927865 72057594037927865 72057594037927865 [ 238.361888] Node 0 Normal free:193448kB min:99395541895224kB low:73886371836733356kB high:147673348131571488kB reB [ 238.364765] lowmem_reserve[]: 0 0 0 0 0 [ 238.365101] Node 0 DMA: 7*4kB (U) 5*8kB (UE) 6*16kB (UME) 2*32kB (UM) 1*64kB (U) 2*128kB (UE) 3*256kB (UME) 2*512B [ 238.366379] Node 0 DMA32: 0*4kB 1*8kB (U) 2*16kB (UM) 2*32kB (UM) 2*64kB (UM) 1*128kB (U) 1*256kB (U) 1*512kB (U)B [ 238.367654] Node 0 Normal: 1985*4kB (UME) 1321*8kB (UME) 844*16kB (UME) 524*32kB (UME) 300*64kB (UME) 138*128kB (B [ 238.369184] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB [ 238.369915] 130 total pagecache pages [ 238.370241] 0 pages in swap cache [ 238.370533] Swap cache stats: add 0, delete 0, find 0/0 [ 238.370981] Free swap = 0kB [ 238.371239] Total swap = 0kB [ 238.371488] 1048445 pages RAM [ 238.371756] 0 pages HighMem/MovableOnly [ 238.372090] 306992 pages reserved [ 238.372376] 0 pages cma reserved [ 238.372661] 0 pages hwpoisoned In another instance (older kernel), I was able to observe this (negative page count :/): [ 180.896971] Offlined Pages 32768 [ 182.667462] Offlined Pages 32768 [ 184.408117] Offlined Pages 32768 [ 186.026321] Offlined Pages 32768 [ 187.684861] Offlined Pages 32768 [ 189.227013] Offlined Pages 32768 [ 190.830303] Offlined Pages 32768 [ 190.833071] Built 1 zonelists, mobility grouping on. Total pages: -36920272750453009 In another instance (older kernel), I was no longer able to start any process: [root@vm ~]# [ 214.348068] Offlined Pages 32768 [ 215.973009] Offlined Pages 32768 cat /proc/meminfo -bash: fork: Cannot allocate memory [root@vm ~]# cat /proc/meminfo -bash: fork: Cannot allocate memory Fix it by properly adjusting the managed page count when migrating if the zone changed. The managed page count of the zones now looks after unplug of the DIMM (and after deflating the balloon) just like before inflating the balloon (and plugging+onlining the DIMM). We'll temporarily modify the totalram page count. If this ever becomes a problem, we can fine tune by providing helpers that don't touch the totalram pages (e.g., adjust_zone_managed_page_count()). Please note that fixing up the managed page count is only necessary when we adjusted the managed page count when inflating - only if we don't have VIRTIO_BALLOON_F_DEFLATE_ON_OOM. With that feature, the managed page count is not touched when inflating/deflating. Reported-by:
Yumei Huang <yuhuang@redhat.com> Fixes: 3dcc0571 ("mm: correctly update zone->managed_pages") Cc: <stable@vger.kernel.org> # v3.11+ Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Igor Mammedov <imammedo@redhat.com> Cc: virtualization@lists.linux-foundation.org Signed-off-by:
David Hildenbrand <david@redhat.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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Miquel Raynal authored
commit 69c7f461 upstream. Any write with either dd or flashcp to a device driven by the spear_smi.c driver will pass through the spear_smi_cpy_toio() function. This function will get called for chunks of up to 256 bytes. If the amount of data is smaller, we may have a problem if the data length is not 4-byte aligned. In this situation, the kernel panics during the memcpy: # dd if=/dev/urandom bs=1001 count=1 of=/dev/mtd6 spear_smi_cpy_toio [620] dest c9070000, src c7be8800, len 256 spear_smi_cpy_toio [620] dest c9070100, src c7be8900, len 256 spear_smi_cpy_toio [620] dest c9070200, src c7be8a00, len 256 spear_smi_cpy_toio [620] dest c9070300, src c7be8b00, len 233 Unhandled fault: external abort on non-linefetch (0x808) at 0xc90703e8 [...] PC is at memcpy+0xcc/0x330 The above error occurs because the implementation of memcpy_toio() tries to optimize the number of I/O by writing 4 bytes at a time as much as possible, until there are less than 4 bytes left and then switches to word or byte writes. Unfortunately, the specification states about the Write Burst mode: "the next AHB Write request should point to the next incremented address and should have the same size (byte, half-word or word)" This means ARM architecture implementation of memcpy_toio() cannot reliably be used blindly here. Workaround this situation by update the write path to stick to byte access when the burst length is not multiple of 4. Fixes: f18dbbb1 ("mtd: ST SPEAr: Add SMI driver for serial NOR flash") Cc: Russell King <linux@armlinux.org.uk> Cc: Boris Brezillon <boris.brezillon@collabora.com> Cc: stable@vger.kernel.org Signed-off-by:
Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
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Tadeusz Struk authored
commit f1689114 upstream. devm_kcalloc() can fail and return NULL so we need to check for that. Cc: stable@vger.kernel.org Fixes: 58472f5c ("tpm: validate TPM 2.0 commands") Signed-off-by:
Tadeusz Struk <tadeusz.struk@intel.com> Reviewed-by:
Jerry Snitselaar <jsnitsel@redhat.com> Reviewed-by:
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by:
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Pete Zaitcev authored
commit 19e6317d upstream. The problem arises because our read() function grabs a lock of the circular buffer, finds something of interest, then invokes copy_to_user() straight from the buffer, which in turn takes mm->mmap_sem. In the same time, the callback mon_bin_vma_fault() is invoked under mm->mmap_sem. It attempts to take the fetch lock and deadlocks. This patch does away with protecting of our page list with any semaphores, and instead relies on the kernel not close the device while mmap is active in a process. In addition, we prohibit re-sizing of a buffer while mmap is active. This way, when (now unlocked) fault is processed, it works with the page that is intended to be mapped-in, and not some other random page. Note that this may have an ABI impact, but hopefully no legitimate program is this wrong. Signed-off-by:
Pete Zaitcev <zaitcev@redhat.com> Reported-by: syzbot+56f9673bb4cdcbeb0e92@syzkaller.appspotmail.com Reviewed-by:
Alan Stern <stern@rowland.harvard.edu> Fixes: 46eb14a6 ("USB: fix usbmon BUG trigger") Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20191204203941.3503452b@suzdal.zaitcev.lanSigned-off-by:
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Emiliano Ingrassia authored
commit 1cd17f7f upstream. Explicitly initialize URB structure urb_list field in usb_init_urb(). This field can be potentially accessed uninitialized and its initialization is coherent with the usage of list_del_init() in usb_hcd_unlink_urb_from_ep() and usb_giveback_urb_bh() and its explicit initialization in usb_hcd_submit_urb() error path. Signed-off-by:
Emiliano Ingrassia <ingrassia@epigenesys.com> Cc: stable <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20191127160355.GA27196@ingrassia.epigenesys.comSigned-off-by:
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Johan Hovold authored
commit 3c11c4be upstream. Make sure to use the current alternate setting when verifying the interface descriptors to avoid binding to an invalid interface. Failing to do so could cause the driver to misbehave or trigger a WARN() in usb_submit_urb() that kernels with panic_on_warn set would choke on. Fixes: 03270634 ("USB: Add ADU support for Ontrak ADU devices") Cc: stable <stable@vger.kernel.org> # 2.6.19 Signed-off-by:
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Wen Yang authored
commit 1848a543 upstream. Free the sw structure only after we are done using it. This patch just moves the put_device() down a bit to avoid the use after free. Fixes: 5c54fcac ("usb: roles: Take care of driver module reference counting") Signed-off-by:
Wen Yang <wenyang@linux.alibaba.com> Reviewed-by:
Peter Chen <peter.chen@nxp.com> Cc: stable <stable@vger.kernel.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Chunfeng Yun <chunfeng.yun@mediatek.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org Link: https://lore.kernel.org/r/20191124142236.25671-1-wenyang@linux.alibaba.comSigned-off-by:
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Johan Hovold authored
commit 7c5a2df3 upstream. Make sure to use the current alternate setting when looking up the endpoints on epic devices to avoid binding to an invalid interface. Failing to do so could cause the driver to misbehave or trigger a WARN() in usb_submit_urb() that kernels with panic_on_warn set would choke on. Fixes: 6e8cf775 ("USB: add EPIC support to the io_edgeport driver") Cc: stable <stable@vger.kernel.org> # 2.6.21 Signed-off-by:
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