| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/02/02 | upstream (ToT) | a86bf2283d2c | C | Failed due to an error; will retry later |
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| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/02/02 | upstream (ToT) | a86bf2283d2c | C | Failed due to an error; will retry later |
BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1)
BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
======================================================
WARNING: possible circular locking dependency detected
5.15.178-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor241/4019 is trying to acquire lock:
ffff0000d3974650 (sb_internal#2){.+.+}-{0:0}, at: btrfs_start_transaction+0x34/0x44 fs/btrfs/transaction.c:777
but task is already holding lock:
ffff0000dbfa8610 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
ffff0000dbfa8610 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x110/0xad4 fs/ioctl.c:685
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&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:1431
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
-> #2 (&fs_devs->device_list_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_run_dev_stats+0xe4/0xe24 fs/btrfs/volumes.c:7985
commit_cowonly_roots+0x17c/0x808 fs/btrfs/transaction.c:1290
btrfs_commit_transaction+0xef4/0x30f0 fs/btrfs/transaction.c:2392
btrfs_clear_free_space_tree+0x5d0/0x9bc fs/btrfs/free-space-tree.c:1264
btrfs_start_pre_rw_mount+0x24c/0x578 fs/btrfs/disk-io.c:3079
open_ctree+0x2290/0x28f4 fs/btrfs/disk-io.c:3634
btrfs_fill_super+0x1b4/0x2c8 fs/btrfs/super.c:1387
btrfs_mount_root+0x6f8/0x7f8 fs/btrfs/super.c:1752
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
fc_mount fs/namespace.c:1000 [inline]
vfs_kern_mount+0xdc/0x178 fs/namespace.c:1030
btrfs_mount+0x328/0x9b8 fs/btrfs/super.c:1812
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
do_new_mount+0x278/0x8fc fs/namespace.c:3012
path_mount+0x594/0x101c fs/namespace.c:3342
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount fs/namespace.c:3540 [inline]
__arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3540
__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 (&fs_info->tree_log_mutex){+.+.}-{3:3}:
__lock_release kernel/locking/lockdep.c:5339 [inline]
lock_release+0x340/0xa1c kernel/locking/lockdep.c:5643
__mutex_unlock_slowpath+0xe0/0x6d4 kernel/locking/mutex.c:851
mutex_unlock+0x8c/0xe0 kernel/locking/mutex.c:536
btrfs_commit_transaction+0x1650/0x30f0 fs/btrfs/transaction.c:2439
btrfs_clear_free_space_tree+0x5d0/0x9bc fs/btrfs/free-space-tree.c:1264
btrfs_start_pre_rw_mount+0x24c/0x578 fs/btrfs/disk-io.c:3079
open_ctree+0x2290/0x28f4 fs/btrfs/disk-io.c:3634
btrfs_fill_super+0x1b4/0x2c8 fs/btrfs/super.c:1387
btrfs_mount_root+0x6f8/0x7f8 fs/btrfs/super.c:1752
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
fc_mount fs/namespace.c:1000 [inline]
vfs_kern_mount+0xdc/0x178 fs/namespace.c:1030
btrfs_mount+0x328/0x9b8 fs/btrfs/super.c:1812
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
do_new_mount+0x278/0x8fc fs/namespace.c:3012
path_mount+0x594/0x101c fs/namespace.c:3342
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount fs/namespace.c:3540 [inline]
__arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3540
__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 (sb_internal#2){.+.+}-{0:0}:
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
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
__sb_start_write include/linux/fs.h:1813 [inline]
sb_start_intwrite include/linux/fs.h:1930 [inline]
start_transaction+0x644/0x1480 fs/btrfs/transaction.c:678
btrfs_start_transaction+0x34/0x44 fs/btrfs/transaction.c:777
btrfs_fileattr_set+0x4dc/0x9b8 fs/btrfs/ioctl.c:331
vfs_fileattr_set+0x70c/0xad4 fs/ioctl.c:700
do_vfs_ioctl+0x1634/0x2a38
__do_sys_ioctl fs/ioctl.c:872 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__arm64_sys_ioctl+0xe4/0x1c8 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
other info that might help us debug this:
Chain exists of:
sb_internal#2 --> &fs_devs->device_list_mutex --> &type->i_mutex_dir_key#6
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&type->i_mutex_dir_key#6);
lock(&fs_devs->device_list_mutex);
lock(&type->i_mutex_dir_key#6);
lock(sb_internal#2);
*** DEADLOCK ***
2 locks held by syz-executor241/4019:
#0: ffff0000d3974460 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:421
#1: ffff0000dbfa8610 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
#1: ffff0000dbfa8610 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x110/0xad4 fs/ioctl.c:685
stack backtrace:
CPU: 1 PID: 4019 Comm: syz-executor241 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
__sb_start_write include/linux/fs.h:1813 [inline]
sb_start_intwrite include/linux/fs.h:1930 [inline]
start_transaction+0x644/0x1480 fs/btrfs/transaction.c:678
btrfs_start_transaction+0x34/0x44 fs/btrfs/transaction.c:777
btrfs_fileattr_set+0x4dc/0x9b8 fs/btrfs/ioctl.c:331
vfs_fileattr_set+0x70c/0xad4 fs/ioctl.c:700
do_vfs_ioctl+0x1634/0x2a38
__do_sys_ioctl fs/ioctl.c:872 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__arm64_sys_ioctl+0xe4/0x1c8 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
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/02/02 20:26 | linux-5.15.y | c16c81c81336 | 568559e4 | .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_start_transaction | |
| 2025/02/02 18:41 | linux-5.15.y | c16c81c81336 | 568559e4 | .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_start_transaction | |
| 2025/02/02 16:47 | linux-5.15.y | c16c81c81336 | 568559e4 | .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_start_transaction | |
| 2025/02/02 14:28 | linux-5.15.y | c16c81c81336 | 568559e4 | .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_start_transaction | |
| 2025/02/02 11:23 | linux-5.15.y | c16c81c81336 | 568559e4 | .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_start_transaction | |
| 2025/02/02 09:06 | linux-5.15.y | c16c81c81336 | 568559e4 | .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_start_transaction | |
| 2025/02/02 07:03 | linux-5.15.y | c16c81c81336 | 568559e4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | possible deadlock in btrfs_start_transaction |