| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2024/05/04 | upstream (ToT) | 7367539ad4b0 | C | [report] BUG: MAX_LOCKDEP_KEYS too low! |
syzbot |
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| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2024/05/04 | upstream (ToT) | 7367539ad4b0 | C | [report] BUG: MAX_LOCKDEP_KEYS too low! |
| Created | Duration | User | Patch | Repo | Result |
|---|---|---|---|---|---|
| 2024/12/20 10:00 | 14m | retest repro | linux-5.15.y | report log | |
| 2024/12/20 10:00 | 11m | retest repro | linux-5.15.y | report log | |
| 2024/12/20 10:00 | 11m | retest repro | linux-5.15.y | report log | |
| 2024/12/20 10:00 | 11m | retest repro | linux-5.15.y | report log | |
| 2024/12/20 10:00 | 14m | retest repro | linux-5.15.y | report log | |
| 2024/10/25 09:56 | 2h24m | retest repro | linux-5.15.y | report log | |
| 2024/10/25 09:56 | 15m | retest repro | linux-5.15.y | report log | |
| 2024/10/25 09:56 | 12m | retest repro | linux-5.15.y | report log | |
| 2024/10/25 09:56 | 10m | retest repro | linux-5.15.y | report log |
======================================================
WARNING: possible circular locking dependency detected
5.15.167-syzkaller #0 Not tainted
------------------------------------------------------
btrfs-transacti/4038 is trying to acquire lock:
ffff0000d3268ce0 (&fs_devs->device_list_mutex){+.+.}-{3:3}, at: btrfs_run_dev_stats+0xe4/0xe24 fs/btrfs/volumes.c:7949
but task is already holding lock:
ffff0000d9c58720 (&fs_info->tree_log_mutex){+.+.}-{3:3}, at: btrfs_commit_transaction+0xe34/0x30f0 fs/btrfs/transaction.c:2367
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&fs_info->tree_log_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
btrfs_commit_transaction+0xe34/0x30f0 fs/btrfs/transaction.c:2367
transaction_kthread+0x284/0x3f4 fs/btrfs/disk-io.c:1904
kthread+0x37c/0x45c kernel/kthread.c:334
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
-> #3 (&fs_info->reloc_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
btrfs_record_root_in_trans fs/btrfs/transaction.c:511 [inline]
start_transaction+0x450/0x1480 fs/btrfs/transaction.c:748
btrfs_start_transaction+0x34/0x44 fs/btrfs/transaction.c:777
btrfs_create+0x134/0x56c fs/btrfs/inode.c:6899
lookup_open fs/namei.c:3462 [inline]
open_last_lookups fs/namei.c:3532 [inline]
path_openat+0xf18/0x26cc fs/namei.c:3739
do_filp_open+0x1a8/0x3b4 fs/namei.c:3769
do_sys_openat2+0x128/0x3e0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__arm64_sys_openat+0x1f0/0x240 fs/open.c:1280
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #2 (sb_internal#2){.+.+}-{0:0}:
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
__sb_start_write include/linux/fs.h:1811 [inline]
sb_start_intwrite include/linux/fs.h:1928 [inline]
start_transaction+0x644/0x1480 fs/btrfs/transaction.c:678
btrfs_start_transaction+0x34/0x44 fs/btrfs/transaction.c:777
btrfs_create+0x134/0x56c fs/btrfs/inode.c:6899
lookup_open fs/namei.c:3462 [inline]
open_last_lookups fs/namei.c:3532 [inline]
path_openat+0xf18/0x26cc fs/namei.c:3739
do_filp_open+0x1a8/0x3b4 fs/namei.c:3769
do_sys_openat2+0x128/0x3e0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__arm64_sys_openat+0x1f0/0x240 fs/open.c:1280
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #1 (&type->i_mutex_dir_key#6){++++}-{3:3}:
down_read+0xc0/0x398 kernel/locking/rwsem.c:1498
inode_lock_shared include/linux/fs.h:799 [inline]
lookup_slow+0x50/0x84 fs/namei.c:1679
walk_component+0x394/0x4cc fs/namei.c:1976
lookup_last fs/namei.c:2431 [inline]
path_lookupat+0x13c/0x3d0 fs/namei.c:2455
filename_lookup+0x1c4/0x4c8 fs/namei.c:2484
kern_path+0x4c/0x194 fs/namei.c:2582
lookup_bdev+0xc0/0x25c block/bdev.c:979
device_matched fs/btrfs/volumes.c:568 [inline]
btrfs_free_stale_devices+0x658/0x9ec fs/btrfs/volumes.c:608
btrfs_forget_devices+0x5c/0x98 fs/btrfs/volumes.c:1395
btrfs_control_ioctl+0x12c/0x248 fs/btrfs/super.c:2451
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #0 (&fs_devs->device_list_mutex){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012
lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
__mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
btrfs_run_dev_stats+0xe4/0xe24 fs/btrfs/volumes.c:7949
commit_cowonly_roots+0x17c/0x808 fs/btrfs/transaction.c:1290
btrfs_commit_transaction+0xef4/0x30f0 fs/btrfs/transaction.c:2392
transaction_kthread+0x284/0x3f4 fs/btrfs/disk-io.c:1904
kthread+0x37c/0x45c kernel/kthread.c:334
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
other info that might help us debug this:
Chain exists of:
&fs_devs->device_list_mutex --> &fs_info->reloc_mutex --> &fs_info->tree_log_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&fs_info->tree_log_mutex);
lock(&fs_info->reloc_mutex);
lock(&fs_info->tree_log_mutex);
lock(&fs_devs->device_list_mutex);
*** DEADLOCK ***
3 locks held by btrfs-transacti/4038:
#0: ffff0000d9c587b0 (&fs_info->transaction_kthread_mutex){+.+.}-{3:3}, at: transaction_kthread+0xd0/0x3f4 fs/btrfs/disk-io.c:1875
#1: ffff0000d9c58c90 (&fs_info->reloc_mutex){+.+.}-{3:3}, at: btrfs_commit_transaction+0xd9c/0x30f0 fs/btrfs/transaction.c:2317
#2: ffff0000d9c58720 (&fs_info->tree_log_mutex){+.+.}-{3:3}, at: btrfs_commit_transaction+0xe34/0x30f0 fs/btrfs/transaction.c:2367
stack backtrace:
CPU: 1 PID: 4038 Comm: btrfs-transacti Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
dump_stack+0x1c/0x58 lib/dump_stack.c:113
print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011
check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012
lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
__mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
btrfs_run_dev_stats+0xe4/0xe24 fs/btrfs/volumes.c:7949
commit_cowonly_roots+0x17c/0x808 fs/btrfs/transaction.c:1290
btrfs_commit_transaction+0xef4/0x30f0 fs/btrfs/transaction.c:2392
transaction_kthread+0x284/0x3f4 fs/btrfs/disk-io.c:1904
kthread+0x37c/0x45c kernel/kthread.c:334
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024/09/21 06:32 | linux-5.15.y | 3a5928702e71 | 6f888b75 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/08/24 07:07 | linux-5.15.y | fa93fa65db6e | d7d32352 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/07/25 07:38 | linux-5.15.y | 7c6d66f0266f | d1a1b0ca | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/07/25 05:32 | linux-5.15.y | 7c6d66f0266f | d1a1b0ca | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/07/25 03:31 | linux-5.15.y | 7c6d66f0266f | d1a1b0ca | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/07/25 01:30 | linux-5.15.y | 7c6d66f0266f | d1a1b0ca | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/07/20 06:04 | linux-5.15.y | 7c6d66f0266f | 890ce4f3 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/05/02 03:54 | linux-5.15.y | b925f60c6ee7 | 3ba885bc | .config | console log | report | syz | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/05/02 03:16 | linux-5.15.y | b925f60c6ee7 | 3ba885bc | .config | console log | report | syz | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | |
| 2024/06/23 19:49 | linux-5.15.y | 4878aadf2d15 | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in btrfs_run_dev_stats | ||
| 2024/05/02 02:22 | linux-5.15.y | b925f60c6ee7 | 3ba885bc | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats | ||
| 2024/05/02 02:20 | linux-5.15.y | b925f60c6ee7 | 3ba885bc | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_run_dev_stats |