INFO: task kworker/u8:5:1091 blocked for more than 143 seconds.
Not tainted 6.12.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:5 state:D stack:21384 pid:1091 tgid:1091 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-bcachefs-9)
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
__closure_sync_timeout+0x2d8/0x450 lib/closure.c:217
closure_sync_timeout include/linux/closure.h:206 [inline]
__bch2_wait_on_allocator+0x11a/0x250 fs/bcachefs/alloc_foreground.c:1812
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline]
__bch2_write+0x562a/0x5dd0 fs/bcachefs/io_write.c:1501
bch2_write+0x9b5/0x1760 fs/bcachefs/io_write.c:1631
closure_queue include/linux/closure.h:270 [inline]
closure_call include/linux/closure.h:432 [inline]
bch2_writepage_do_io fs/bcachefs/fs-io-buffered.c:449 [inline]
bch2_writepages+0x27d/0x380 fs/bcachefs/fs-io-buffered.c:641
do_writepages+0x35f/0x870 mm/page-writeback.c:2683
__writeback_single_inode+0x14f/0x10d0 fs/fs-writeback.c:1658
writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1954
wb_writeback+0x41b/0xbd0 fs/fs-writeback.c:2134
wb_do_writeback fs/fs-writeback.c:2281 [inline]
wb_workfn+0x410/0x1090 fs/fs-writeback.c:2321
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz-executor:6365 blocked for more than 144 seconds.
Not tainted 6.12.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20992 pid:6365 tgid:6365 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:216
__writeback_inodes_sb_nr+0x2d2/0x380 fs/fs-writeback.c:2713
sync_filesystem+0xa4/0x230 fs/sync.c:54
generic_shutdown_super+0x72/0x2d0 fs/super.c:621
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2278
deactivate_locked_super+0xc6/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
task_work_run+0x251/0x310 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f203157fa47
RSP: 002b:00007ffe26bd8578 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f203157fa47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe26bd8630
RBP: 00007ffe26bd8630 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe26bd96b0
R13: 00007f20315f14b4 R14: 000000000002fe12 R15: 00007ffe26bd96f0
INFO: task bch-copygc/loop:7595 blocked for more than 145 seconds.
Not tainted 6.12.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-copygc/loop state:D stack:17296 pid:7595 tgid:7595 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
__closure_sync_timeout+0x2d8/0x450 lib/closure.c:217
closure_sync_timeout include/linux/closure.h:206 [inline]
__bch2_wait_on_allocator+0x11a/0x250 fs/bcachefs/alloc_foreground.c:1812
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline]
__bch2_write+0x562a/0x5dd0 fs/bcachefs/io_write.c:1501
bch2_write+0x9b5/0x1760 fs/bcachefs/io_write.c:1631
closure_queue include/linux/closure.h:270 [inline]
closure_call include/linux/closure.h:432 [inline]
bch2_data_update_read_done+0x22e/0x330 fs/bcachefs/data_update.c:426
move_write fs/bcachefs/move.c:133 [inline]
bch2_moving_ctxt_do_pending_writes+0x44c/0x8d0 fs/bcachefs/move.c:164
bkey_nocow_lock fs/bcachefs/data_update.c:71 [inline]
bch2_data_update_init+0x125d/0x68d0 fs/bcachefs/data_update.c:632
bch2_move_extent+0xfaa/0x2ac0 fs/bcachefs/move.c:313
bch2_evacuate_bucket+0x23d1/0x3620 fs/bcachefs/move.c:753
bch2_copygc+0x42c9/0x4ca0 fs/bcachefs/movinggc.c:240
bch2_copygc_thread+0x737/0xc20 fs/bcachefs/movinggc.c:381
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by kworker/u8:5/1091:
#0: ffff8880206b5148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff8880206b5148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90003ff7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90003ff7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by kworker/u8:9/3585:
#0: ffff8880b863ea98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606
#1: ffffc9000c94fd00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000c94fd00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by getty/5595:
#0: ffff88814d11b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/6365:
#0: ffff888020f920e0 (&type->s_umount_key#97){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888020f920e0 (&type->s_umount_key#97){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888020f920e0 (&type->s_umount_key#97){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 52 Comm: kworker/u8:3 Not tainted 6.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x5c/0xb0 kernel/rcu/tree.c:737
Code: c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 dc dc 83 00 48 c7 c3 98 7e 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 <75> 22 8b 03 65 ff 0d 01 10 89 7e 74 10 83 e0 04 c1 e8 02 5b 41 5e
RSP: 0018:ffffc90000bd7a00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b8637e98 RCX: ffffffff81706f00
RDX: 0000000000000000 RSI: ffffffff8c610a00 RDI: ffffffff8c6109c0
RBP: ffffc90000bd7b48 R08: ffffffff901d09ef R09: 1ffffffff203a13d
R10: dffffc0000000000 R11: fffffbfff203a13e R12: 1ffff9200017af50
R13: ffffffff8b913abb R14: ffffffff8e320a50 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f308fb09178 CR3: 0000000032dcc000 CR4: 0000000000350ef0
Call Trace:
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xbf/0xa30 kernel/locking/lockdep.c:5836
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x28b/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244