INFO: task syz-executor:5920 blocked for more than 143 seconds.
Not tainted 6.12.0-rc3-syzkaller-g75aa74d52f43 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20096 pid:5920 tgid:5920 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
kthread_stop+0x19e/0x640 kernel/kthread.c:712
bch2_copygc_stop+0x4f/0x150 fs/bcachefs/movinggc.c:411
__bch2_fs_read_only+0x47/0x430 fs/bcachefs/super.c:265
bch2_fs_read_only+0xb57/0x1200 fs/bcachefs/super.c:355
__bch2_fs_stop+0x105/0x5c0 fs/bcachefs/super.c:620
generic_shutdown_super+0x13b/0x2d0 fs/super.c:642
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2282
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:228
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: 0033:0x7f6467f7f227
RSP: 002b:00007fffd37c0fc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6467f7f227
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffd37c1080
RBP: 00007fffd37c1080 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffd37c2100
R13: 00007f6467ff0a14 R14: 000000000001f459 R15: 00007fffd37c2140
Showing all locks held in the system:
5 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/4985:
#0: ffff88803264a0a0 (&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
2 locks held by syz-executor/5920:
#0: ffff8880303160e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880303160e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880303160e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff888073480278 (&c->state_lock){+.+.}-{3:3}, at: __bch2_fs_stop+0xfd/0x5c0 fs/bcachefs/super.c:619
1 lock held by syz.0.451/7046:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-g75aa74d52f43 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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: 11 Comm: kworker/u8:0 Not tainted 6.12.0-rc3-syzkaller-g75aa74d52f43 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4873 [inline]
RIP: 0010:__lock_acquire+0xace/0x2050 kernel/locking/lockdep.c:5152
Code: c1 0f 8c 52 fe ff ff 48 c7 c7 40 32 1d 90 e8 e9 35 8e 00 48 ba 00 00 00 00 00 fc ff df e9 37 fe ff ff 8b 44 24 08 38 44 24 54 <4c> 8b 64 24 30 4c 8b 6c 24 48 4c 8b 7c 24 10 76 37 e8 bc dd 48 03
RSP: 0018:ffffc90000107330 EFLAGS: 00000093
RAX: 0000000000000003 RBX: ffffffff93c41cfe RCX: 0000000000000003
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff942c9800
RBP: 0000000000000003 R08: ffffffff942c9807 R09: 1ffffffff2859300
R10: dffffc0000000000 R11: fffffbfff2859301 R12: 0000000000000005
R13: ffff88801cacc7c8 R14: 0000000000000005 R15: ffff88801cacc7c8
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2690fff000 CR3: 000000000e734000 CR4: 0000000000350ef0
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
__pte_offset_map+0x9e/0x380 mm/pgtable-generic.c:287
__pte_offset_map_lock+0xc7/0x300 mm/pgtable-generic.c:371
get_locked_pte include/linux/mm.h:2727 [inline]
__text_poke+0x2c5/0xd30 arch/x86/kernel/alternative.c:1899
text_poke arch/x86/kernel/alternative.c:1984 [inline]
text_poke_bp_batch+0x8cd/0xb30 arch/x86/kernel/alternative.c:2373
text_poke_flush arch/x86/kernel/alternative.c:2486 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked+0xd2/0x1c0 kernel/jump_label.c:240
static_key_disable+0x1a/0x20 kernel/jump_label.c:248
toggle_allocation_gate+0x1bf/0x260 mm/kfence/core.c:854
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