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🐞 Open [961] 🐞 Fixed [3806] 🐞 Invalid [8177] 📈 Kernel Health 📈 Bug Lifetimes 📈 Fuzzing 📈 Crashes |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-4.14 | possible deadlock in blkdev_reread_part | C | 28421 | 28m | 1141d | 0/1 | upstream: reported C repro on 2019/04/11 12:33 | ||
android-49 | possible deadlock in blkdev_reread_part | C | 6117 | 905d | 1141d | 0/3 | public: reported C repro on 2019/04/12 00:00 | ||
android-44 | possible deadlock in blkdev_reread_part | C | 3896 | 906d | 1141d | 0/2 | public: reported C repro on 2019/04/12 00:00 |
====================================================== WARNING: possible circular locking dependency detected 4.14.0-rc2+ #10 Not tainted ------------------------------------------------------ syzkaller821047/2981 is trying to acquire lock: (&bdev->bd_mutex){+.+.}, at: [<ffffffff8232c60e>] blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 but task is already holding lock: (&lo->lo_ctl_mutex#2){+.+.}, at: [<ffffffff83541ef9>] lo_compat_ioctl+0x109/0x140 drivers/block/loop.c:1533 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&lo->lo_ctl_mutex#2){+.+.}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x328f/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x19d0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 lo_release+0x6b/0x180 drivers/block/loop.c:1587 __blkdev_put+0x602/0x7c0 fs/block_dev.c:1780 blkdev_put+0x85/0x4f0 fs/block_dev.c:1845 blkdev_close+0x91/0xc0 fs/block_dev.c:1852 __fput+0x333/0x7f0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:244 task_work_run+0x199/0x270 kernel/task_work.c:112 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x296/0x310 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath+0x42f/0x510 arch/x86/entry/common.c:266 entry_SYSCALL_64_fastpath+0xbc/0xbe -> #0 (&bdev->bd_mutex){+.+.}: check_prev_add+0x865/0x1520 kernel/locking/lockdep.c:1894 check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x328f/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x19d0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 loop_reread_partitions+0x12f/0x1a0 drivers/block/loop.c:614 loop_set_status+0x9ba/0xf60 drivers/block/loop.c:1156 loop_set_status_compat+0x92/0xf0 drivers/block/loop.c:1506 lo_compat_ioctl+0x114/0x140 drivers/block/loop.c:1534 compat_blkdev_ioctl+0x3ba/0x1850 block/compat_ioctl.c:405 C_SYSC_ioctl fs/compat_ioctl.c:1593 [inline] compat_SyS_ioctl+0x1d7/0x3290 fs/compat_ioctl.c:1540 do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline] do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&lo->lo_ctl_mutex#2); lock(&bdev->bd_mutex); lock(&lo->lo_ctl_mutex#2); lock(&bdev->bd_mutex); *** DEADLOCK *** 1 lock held by syzkaller821047/2981: #0: (&lo->lo_ctl_mutex#2){+.+.}, at: [<ffffffff83541ef9>] lo_compat_ioctl+0x109/0x140 drivers/block/loop.c:1533 stack backtrace: CPU: 0 PID: 2981 Comm: syzkaller821047 Not tainted 4.14.0-rc2+ #10 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_circular_bug+0x503/0x710 kernel/locking/lockdep.c:1259 check_prev_add+0x865/0x1520 kernel/locking/lockdep.c:1894 check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x328f/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x19d0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 loop_reread_partitions+0x12f/0x1a0 drivers/block/loop.c:614 loop_set_status+0x9ba/0xf60 drivers/block/loop.c:1156 loop_set_status_compat+0x92/0xf0 drivers/block/loop.c:1506 lo_compat_ioctl+0x114/0x140 drivers/block/loop.c:1534 compat_blkdev_ioctl+0x3ba/0x1850 block/compat_ioctl.c:405 C_SYSC_ioctl fs/compat_ioctl.c:1593 [inline] compat_SyS_ioctl+0x1d7/0x3290 fs/compat_ioctl.c:1540 do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline] do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124 RIP: 0023:0xf7f4bc79 RSP: 002b:00000000ff90868c EFLAGS: 00000286 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000004c02 RDX: 00000
Manager | Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Title |
---|---|---|---|---|---|---|---|---|---|---|---|
ci-upstream-kasan-gce | 2017/09/25 13:28 | upstream | e19b205be43d | c26ea367 | .config | log | report | syz | C | ||
ci-upstream-kasan-gce-386 | 2018/12/02 08:57 | upstream | 4b78317679c4 | 5a581673 | .config | log | report | syz | C | ||
ci-upstream-kasan-gce-386 | 2018/10/18 16:16 | upstream | 9bd871df56a7 | d257b2d2 | .config | log | report | syz | C | ||
ci-upstream-kasan-gce-386 | 2018/02/09 23:57 | upstream | f9f1e414128e | 2b6b214c | .config | log | report | syz | C | ||
ci-upstream-kasan-gce-386 | 2018/02/09 08:16 | upstream | c0136321924d | 9fb5ec43 | .config | log | report | syz | C | ||
ci-upstream-kasan-gce-386 | 2017/12/19 23:51 | upstream | ace52288edf0 | af9163c7 | .config | log | report | syz | C | ||
ci-upstream-kasan-gce-386 | 2017/12/12 20:56 | upstream | a638349bf6c2 | 414a185f | .config | log | report | syz | C | ||
ci-upstream-kasan-gce-386 | 2017/11/15 04:15 | upstream | 894025f24bd0 | cf38de00 | .config | log | report | syz | C | ||
ci-upstream-kasan-gce-386 | 2018/12/27 17:43 | upstream | fc2fd5f0f1aa | 43cf01dd | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/26 08:10 | upstream | d8924c0d76aa | 8a41a0ad | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/25 22:02 | upstream | 8fe28cb58bcb | 8a41a0ad | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/24 12:32 | upstream | 8fe28cb58bcb | be79df56 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/22 12:12 | upstream | 5092adb2272e | 603b5124 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/21 16:06 | upstream | 9097a058d49e | 588075e6 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/20 16:46 | upstream | ab63e725b49c | aaf59e84 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/19 21:53 | upstream | 62393dbcbe0f | fe2dc057 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/19 16:15 | upstream | 62393dbcbe0f | fe2dc057 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/17 23:42 | upstream | 7566ec393f41 | def91db3 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/14 10:07 | upstream | 65e08c5e8631 | fe7127be | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/10 20:46 | upstream | 40e020c129cf | 6565f24d | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/08 09:14 | upstream | 5f179793f0a7 | 65ed2472 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/05 13:38 | upstream | 0072a0c14d5b | ac6c0578 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/05 05:56 | upstream | 0072a0c14d5b | f162ad97 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/04 07:28 | upstream | 0072a0c14d5b | 03f94a45 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/03 20:15 | upstream | 2595646791c3 | 819002b0 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/03 18:37 | upstream | 2595646791c3 | 819002b0 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/12/01 09:18 | upstream | b6839ef26e54 | d8988561 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/30 02:24 | upstream | f92a2ebb3d55 | 66071e27 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/28 10:36 | upstream | ef78e5ec9214 | 4b6d14f2 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/28 08:15 | upstream | ef78e5ec9214 | 4b6d14f2 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/27 19:35 | upstream | ef78e5ec9214 | 4b6d14f2 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/24 04:16 | upstream | e6005d3c4233 | eb9ed731 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/23 13:03 | upstream | edeca3a769ad | 2b0dc848 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/22 23:50 | upstream | edeca3a769ad | 87815d9d | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/21 23:09 | upstream | 92b419289cee | 9db828b5 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/19 13:41 | upstream | 9ff01193a20d | adf636a8 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/18 01:31 | upstream | 1ce80e0fe98e | adf636a8 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/17 15:13 | upstream | 1ce80e0fe98e | b08ee62a | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/12 09:58 | upstream | e12e00e388de | 7b5f8621 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/10 01:18 | upstream | 3541833fd1f2 | f9815aaf | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/09 03:42 | upstream | b00d209241ff | e85d2a61 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/07 04:01 | upstream | 8053e5b93eca | 8bd6bd63 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/06 12:04 | upstream | 163c8d54a997 | 8bd6bd63 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/11/02 20:56 | upstream | 8adcc59974b8 | 8bd6bd63 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/26 03:10 | upstream | bd6bf7c10484 | a8292de9 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/23 09:40 | upstream | ca9eb48fe01f | ecb386fe | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/22 20:29 | upstream | 84df9525b0c2 | ecb386fe | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/21 19:20 | upstream | 23469de647c4 | ecb386fe | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/20 20:36 | upstream | 270b77a0f30e | ecb386fe | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/19 08:39 | upstream | fa520c47eaa1 | 9aba67b5 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/18 12:32 | upstream | 9bd871df56a7 | d257b2d2 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/17 22:39 | upstream | c343db455eb3 | b2695b95 | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/17 14:39 | upstream | c0cff31be705 | 1ba7fd7e | .config | log | report | ||||
ci-upstream-kasan-gce-386 | 2018/10/17 09:04 | upstream | b955a910d7fd | 1ba7fd7e | .config | log | report |