| Title | Replies (including bot) | Last reply |
|---|---|---|
| [syzbot] Monthly bcachefs report (Aug 2025) | 0 (1) | 2025/08/26 07:13 |
| [syzbot] [bcachefs?] INFO: task hung in bch2_fs_read_only | 0 (2) | 2025/04/08 08:41 |
syzbot |
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| Title | Replies (including bot) | Last reply |
|---|---|---|
| [syzbot] Monthly bcachefs report (Aug 2025) | 0 (1) | 2025/08/26 07:13 |
| [syzbot] [bcachefs?] INFO: task hung in bch2_fs_read_only | 0 (2) | 2025/04/08 08:41 |
| Created | Duration | User | Patch | Repo | Result |
|---|---|---|---|---|---|
| 2025/06/18 06:27 | 22m | retest repro | upstream | OK log | |
| 2025/04/02 17:20 | 1h28m | retest repro | upstream | report log | |
| 2025/04/02 17:20 | 1h15m | retest repro | upstream | report log | |
| 2025/03/18 16:01 | 27m | retest repro | upstream | OK log | |
| 2025/02/28 01:11 | 26m | retest repro | upstream | OK log | |
| 2025/02/28 01:11 | 26m | retest repro | upstream | OK log | |
| 2025/02/28 01:11 | 26m | retest repro | upstream | OK log | |
| 2025/02/28 01:11 | 47m | retest repro | upstream | OK log | |
| 2025/01/20 18:16 | 15m | retest repro | upstream | report log | |
| 2025/01/20 18:16 | 16m | retest repro | upstream | report log |
INFO: task syz-executor:5974 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21576 pid:5974 tgid:5974 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
bch2_fs_read_only+0x2f2/0xb00 fs/bcachefs/super.c:358
__bch2_fs_stop+0x100/0x900 fs/bcachefs/super.c:677
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc3fa6ff17
RSP: 002b:00007ffecb2c82c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fcc3faf1c05 RCX: 00007fcc3fa6ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffecb2c8380
RBP: 00007ffecb2c8380 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffecb2c9410
R13: 00007fcc3faf1c05 R14: 000000000001f48e R15: 00007ffecb2c9450
</TASK>
INFO: task syz-executor:6111 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21320 pid:6111 tgid:6111 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
bch2_fs_read_only+0x2f2/0xb00 fs/bcachefs/super.c:358
__bch2_fs_stop+0x100/0x900 fs/bcachefs/super.c:677
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1f76dbff17
RSP: 002b:00007ffdfd279848 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1f76e41c05 RCX: 00007f1f76dbff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdfd279900
RBP: 00007ffdfd279900 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdfd27a990
R13: 00007f1f76e41c05 R14: 0000000000024b61 R15: 00007ffd[ 404.605101][ T38] R13: 00007f1f76e41c05 R14: 0000000000024b61 R15: 00007ffdfd27a9d0
</TASK>
INFO: task syz-executor:6170 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21832 pid:6170 tgid:6170 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
bch2_fs_read_only+0x2f2/0xb00 fs/bcachefs/super.c:358
__bch2_fs_stop+0x100/0x900 fs/bcachefs/super.c:677
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f698d6aff17
RSP: 002b:00007ffc5eb8c6c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f698d731c05 RCX: 00007f698d6aff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc5eb8c780
RBP: 00007ffc5eb8c780 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc5eb8d810
R13: 00007f698d731c05 R14: 0000000000029ccf R15: 00007ffc5eb8d850
</TASK>
INFO: task syz-executor:6217 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20392 pid:6217 tgid:6217 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
bch2_fs_read_only+0x2f2/0xb00 fs/bcachefs/super.c:358
__bch2_fs_stop+0x100/0x900 fs/bcachefs/super.c:677
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f328b43ff17
RSP: 002b:00007ffeb5b4a3d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f328b4c1c05 RCX: 00007f328b43ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb5b4a490
RBP: 00007ffeb5b4a490 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeb5b4b520
R13: 00007f328b4c1c05 R14: 000000000002ea66 R15: 00007ffeb5b4b560
</TASK>
INFO: task syz-executor:6257 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21832 pid:6257 tgid:6257 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
bch2_fs_read_only+0x2f2/0xb00 fs/bcachefs/super.c:358
__bch2_fs_stop+0x100/0x900 fs/bcachefs/super.c:677
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f739ef6ff17
RSP: 002b:00007ffd1d6ab808 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f739eff1c05 RCX: 00007f739ef6ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd1d6ab8c0
RBP: 00007ffd1d6ab8c0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd1d6ac950
R13: 00007f739eff1c05 R14: 0000000000033b1f R15: 00007ffd1d6ac990
</TASK>
INFO: task syz-executor:6296 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21544 pid:6296 tgid:6296 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
bch2_fs_read_only+0x2f2/0xb00 fs/bcachefs/super.c:358
__bch2_fs_stop+0x100/0x900 fs/bcachefs/super.c:677
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3bb56eff17
RSP: 002b:00007ffc92dbee68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3bb5771c05 RCX: 00007f3bb56eff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc92dbef20
RBP: 00007ffc92dbef20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc92dbffb0
R13: 00007f3bb5771c05 R14: 0000000000038c45 R15: 00007ffc92dbfff0
</TASK>
INFO: task syz-executor:6337 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21832 pid:6337 tgid:6337 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
bch2_fs_read_only+0x2f2/0xb00 fs/bcachefs/super.c:358
__bch2_fs_stop+0x100/0x900 fs/bcachefs/super.c:677
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb76deff17
RSP: 002b:00007fff0605b3d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fcb76e71c05 RCX: 00007fcb76deff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff0605b490
RBP: 00007fff0605b490 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff0605c520
R13: 00007fcb76e71c05 R14: 000000000003e60a R15: 00007fff0605c560
</TASK>
Showing all locks held in the system:
4 locks held by pr/legacy/17:
1 lock held by khungtaskd/38:
#0: ffffffff8d9a8bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8d9a8bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8d9a8bc0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:7/161:
5 locks held by kworker/0:3/1898:
2 locks held by getty/5594:
#0: ffff88823bf6c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003e7e2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x444/0x1410 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/5974:
#0: ffff88803656a0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88803656a0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88803656a0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff888055c00268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6111:
#0: ffff88803ca8a0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88803ca8a0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88803ca8a0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff888057400268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6170:
#0: ffff8880355080d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880355080d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880355080d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff888057000268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6217:
#0: ffff8880292a40d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880292a40d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880292a40d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff88805eb00268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6257:
#0: ffff88806302c0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88806302c0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88806302c0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff888067000268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6296:
#0: ffff8880108fe0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880108fe0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880108fe0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff88806c500268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6337:
#0: ffff88802f0900d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88802f0900d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88802f0900d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff88806ac00268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6397:
#0: ffff8880624380d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880624380d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880624380d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff888073b00268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6436:
#0: ffff888030fb80d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff888030fb80d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff888030fb80d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff888073100268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
2 locks held by syz-executor/6477:
#0: ffff888076c6c0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff888076c6c0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff888076c6c0d0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffff88807d300268 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900 fs/bcachefs/super.c:676
3 locks held by syz.0.114/6628:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
watchdog+0xf93/0xfe0 kernel/hung_task.c:491
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 17 Comm: pr/legacy Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:io_serial_in+0x77/0xc0 drivers/tty/serial/8250/8250_port.c:400
Code: e8 de ae 7f fc 44 89 f9 d3 e3 49 83 ee 80 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 9f e5 de fc 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc 44 89 f9 80 e1 07
RSP: 0018:ffffc90000167890 EFLAGS: 00000202
RAX: 1ffffffff3275000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff993a8850 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff853eafa0 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff993a85c0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881268c2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab1b750000 CR3: 0000000035672000 CR4: 00000000003526f0
Call Trace:
<TASK>
serial_in drivers/tty/serial/8250/8250.h:137 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline]
wait_for_lsr+0x1aa/0x2f0 drivers/tty/serial/8250/8250_port.c:1984
fifo_wait_for_lsr drivers/tty/serial/8250/8250_port.c:3288 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3311 [inline]
serial8250_console_write+0x11bd/0x1b40 drivers/tty/serial/8250/8250_port.c:3396
console_emit_next_record kernel/printk/printk.c:3118 [inline]
console_flush_all+0x695/0xcd0 kernel/printk/printk.c:3226
__console_flush_and_unlock+0xa4/0x240 kernel/printk/printk.c:3285
legacy_kthread_func+0x13b/0x1a0 kernel/printk/printk.c:3638
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/09/01 11:50 | upstream | b320789d6883 | 807a3b61 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | |
| 2025/09/01 06:46 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | 8f5ae30d69d7 | 807a3b61 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci-upstream-gce-arm64 | INFO: task hung in bch2_fs_read_only | |
| 2025/08/22 12:03 | upstream | 3957a5720157 | bf27483f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/05/08 07:52 | upstream | d76bb1ebb558 | dbf35fa1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/05/07 11:11 | upstream | 0d8d44db295c | 350f4ffc | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/28 06:06 | upstream | b4432656b36e | c6b4fb39 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/27 20:38 | upstream | 5bc1018675ec | c6b4fb39 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/27 13:09 | upstream | 5bc1018675ec | c6b4fb39 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/27 11:40 | upstream | 5bc1018675ec | c6b4fb39 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/27 07:13 | upstream | 5bc1018675ec | c6b4fb39 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/27 05:25 | upstream | 5bc1018675ec | c6b4fb39 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/27 02:50 | upstream | 5bc1018675ec | c6b4fb39 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/23 10:15 | upstream | bc3372351d0c | 53a8b9bd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/22 08:33 | upstream | a33b5a08cbbd | 2a20f901 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/04/21 23:02 | upstream | 9d7a0577c9db | 2a20f901 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/14 00:51 | upstream | ab68d7eb7b1a | a98a8417 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/13 04:58 | upstream | 4dc1d1bec898 | b27c2402 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/11 01:08 | upstream | a64dcfb451e2 | 43f51a00 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/10 17:25 | upstream | a64dcfb451e2 | 43f51a00 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/10 10:31 | upstream | a64dcfb451e2 | ef44b750 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/09 16:19 | upstream | 9946eaf552b1 | ef44b750 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/08 16:15 | upstream | 8f6629c004b1 | ef44b750 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/07 13:57 | upstream | bb066fe812d6 | 53657d1b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/06 20:23 | upstream | 92514ef226f5 | 8002dd28 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/04 09:59 | upstream | 0de63bb7d919 | 8f267cef | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/02/02 19:41 | upstream | 69b8923f5003 | 568559e4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2025/01/31 21:40 | upstream | 69b8923f5003 | aa47157c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/12/23 14:08 | upstream | 4bbf9020becb | 444551c4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2024/12/21 09:49 | upstream | e9b8ffafd20a | d7f584ee | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/12/21 07:14 | upstream | e9b8ffafd20a | d7f584ee | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/12/21 04:38 | upstream | e9b8ffafd20a | d7f584ee | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/12/21 00:37 | upstream | e9b8ffafd20a | d7f584ee | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/12/20 17:43 | upstream | 8faabc041a00 | 0f61b415 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/12/16 13:03 | upstream | dccbe2047a5b | 7cbfbb3a | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | |
| 2024/11/23 04:30 | upstream | 06afb0f36106 | 68da6d95 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/14 12:54 | upstream | 0a9b9d17f3a7 | 77f3eeb7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/14 09:47 | upstream | 0a9b9d17f3a7 | a8c99394 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/13 20:40 | upstream | f1b785f4c787 | bb3f8425 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/13 16:27 | upstream | f1b785f4c787 | 62026c85 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/13 13:41 | upstream | f1b785f4c787 | bb3f8425 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/12 17:13 | upstream | 2d5404caa8c7 | 75bb1b32 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/12 13:02 | upstream | 2d5404caa8c7 | 75bb1b32 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2024/09/26 05:06 | upstream | aa486552a110 | 0d19f247 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | |
| 2024/09/22 10:15 | upstream | 88264981f208 | 6f888b75 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-upstream-fs | INFO: task hung in bch2_fs_read_only | |
| 2024/11/15 05:55 | upstream | cfaaa7d010d1 | f6ede3a3 | .config | console log | report | syz / log | C | [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] | ci-snapshot-upstream-root | INFO: task hung in bch2_fs_read_only | |
| 2024/11/08 16:23 | upstream | 906bd684e4b1 | d40c056e | .config | console log | report | syz / log | C | [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] | ci-snapshot-upstream-root | INFO: task hung in bch2_fs_read_only | |
| 2024/10/31 13:51 | upstream | 0fc810ae3ae1 | 96eb609f | .config | console log | report | syz / log | C | [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] | ci-snapshot-upstream-root | INFO: task hung in bch2_fs_read_only | |
| 2024/10/29 20:15 | upstream | e42b1a9a2557 | 66aeb999 | .config | console log | report | syz / log | C | [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] | ci-snapshot-upstream-root | INFO: task hung in bch2_fs_read_only | |
| 2024/11/13 05:02 | linux-next | 929beafbe7ac | 62026c85 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/12 22:34 | linux-next | 929beafbe7ac | 75bb1b32 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in bch2_fs_read_only | ||
| 2025/09/01 04:50 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | 8f5ae30d69d7 | 807a3b61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | INFO: task hung in bch2_fs_read_only | ||
| 2025/08/07 12:10 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | 82af5ea7c611 | 04cffc22 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | INFO: task hung in bch2_fs_read_only | ||
| 2025/07/05 23:58 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | 7482bb149b9f | 4f67c4ae | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | INFO: task hung in bch2_fs_read_only | ||
| 2025/03/04 15:54 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | e056da87c780 | c3901742 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/15 16:45 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | 887407160d72 | f6ede3a3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | INFO: task hung in bch2_fs_read_only | ||
| 2024/11/12 20:18 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | a2995abceafa | 75bb1b32 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | INFO: task hung in bch2_fs_read_only |