INFO: task syz-executor282:5820 blocked for more than 143 seconds.
Not tainted 6.13.0-rc2-syzkaller-00192-g243f750a2df0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor282 state:D stack:23840 pid:5820 tgid:5820 ppid:5817 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
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+0x47/0x450 fs/bcachefs/super.c:265
bch2_fs_read_only+0xb57/0x1200 fs/bcachefs/super.c:356
__bch2_fs_stop+0x105/0x5c0 fs/bcachefs/super.c:621
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2278
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
task_work_run+0x24f/0x310 kernel/task_work.c:239
ptrace_notify+0x2d2/0x380 kernel/signal.c:2503
ptrace_report_syscall include/linux/ptrace.h:415 [inline]
ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]
syscall_exit_work+0xc7/0x1d0 kernel/entry/common.c:173
syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
syscall_exit_to_user_mode+0x24a/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff51bc60387
RSP: 002b:00007ffe6ebb5598 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff51bc60387
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe6ebb5650
RBP: 00007ffe6ebb5650 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffe6ebb66b0
R13: 00005555657786c0 R14: 0000000000000001 R15: 431bde82d7b634db
INFO: task bch-copygc/loop:5831 blocked for more than 143 seconds.
Not tainted 6.13.0-rc2-syzkaller-00192-g243f750a2df0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-copygc/loop state:D stack:18904 pid:5831 tgid:5831 ppid:2 flags:0x00024000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
__closure_sync+0x259/0x2f0 lib/closure.c:146
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
move_buckets_wait+0x2ba/0x1290 fs/bcachefs/movinggc.c:120
bch2_copygc_thread+0x83f/0xc10 fs/bcachefs/movinggc.c:392
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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:
7 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
2 locks held by getty/5576:
#0: ffff888031c870a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor282/5820:
#0: ffff88807bd060e0 (&type->s_umount_key#43){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807bd060e0 (&type->s_umount_key#43){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807bd060e0 (&type->s_umount_key#43){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff888072500278 (&c->state_lock){+.+.}-{4:4}, at: __bch2_fs_stop+0xfd/0x5c0 fs/bcachefs/super.c:620
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc2-syzkaller-00192-g243f750a2df0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
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:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 12 Comm: kworker/u8:1 Not tainted 6.13.0-rc2-syzkaller-00192-g243f750a2df0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:149 [inline]
RIP: 0010:wrmsrl arch/x86/include/asm/msr.h:264 [inline]
RIP: 0010:native_x2apic_icr_write arch/x86/include/asm/apic.h:233 [inline]
RIP: 0010:__x2apic_send_IPI_dest arch/x86/kernel/apic/x2apic_phys.c:113 [inline]
RIP: 0010:x2apic_send_IPI+0x7a/0xe0 arch/x86/kernel/apic/x2apic_phys.c:50
Code: d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 29 8b 13 0f ae f0 0f ae e8 41 83 fe 02 b8 00 04 00 00 41 0f 45 c6 b9 30 08 00 00 0f 30 <66> 90 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 d9 80 e1 07 80 c1 03 38
RSP: 0018:ffffc900001176b8 EFLAGS: 00000206
RAX: 00000000000000fb RBX: ffff8880b8721168 RCX: 0000000000000830
RDX: 0000000000000001 RSI: 00000000000000fb RDI: 0000000000000001
RBP: ffffffff8e2cea98 R08: ffffffff819372fa R09: 1ffffffff2030796
R10: dffffc0000000000 R11: ffffffff81491250 R12: dffffc0000000000
R13: ffff8880b863f940 R14: 00000000000000fb R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b58254b600 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:94 [inline]
send_call_function_single_ipi kernel/smp.c:118 [inline]
smp_call_function_many_cond+0x15c6/0x2c60 kernel/smp.c:866
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
text_poke_bp_batch+0x9ef/0xb30
text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2522
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate+0xbc/0x260 mm/kfence/core.c:849
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.201 msecs