INFO: task syz-executor:8360 blocked for more than 143 seconds.
Not tainted 6.16.0-rc1-next-20250613-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21640 pid:8360 tgid:8360 ppid:1 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
__bch2_fs_stop+0x704/0x900 fs/bcachefs/super.c:697
generic_shutdown_super+0x135/0x2c0 fs/super.c:643
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
deactivate_locked_super+0xb9/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417
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:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc20578fc57
RSP: 002b:00007ffdaf440d18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc20578fc57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdaf440dd0
RBP: 00007ffdaf440dd0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdaf441e60
R13: 00007fc205810925 R14: 000000000004dba4 R15: 00007ffdaf441ea0
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by getty/5595:
#0: ffff888034b220a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000331b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/8360:
#0: ffff8880585900e0 (&type->s_umount_key#53){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880585900e0 (&type->s_umount_key#53){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880585900e0 (&type->s_umount_key#53){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
4 locks held by syz-executor/10108:
1 lock held by sed/12051:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc1-next-20250613-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12052 Comm: dhcpcd-run-hook Not tainted 6.16.0-rc1-next-20250613-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__update_min_vruntime kernel/sched/fair.c:752 [inline]
RIP: 0010:update_min_vruntime kernel/sched/fair.c:780 [inline]
RIP: 0010:update_curr+0x2d3/0x8b0 kernel/sched/fair.c:1242
Code: 89 ec 4d 85 ff 74 1d 49 83 c7 30 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 56 42 8e 00 4d 8b 27 4d 89 e5 49 29 ed <4d> 85 ed 7e 4e 49 8d 7e 28 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00
RSP: 0000:ffffc90000a087d8 EFLAGS: 00000012
RAX: 1ffff1100695c3de RBX: ffff888034ae1e80 RCX: dffffc0000000000
RDX: 0000000000000009 RSI: ffffffff8db792e4 RDI: ffffffff8be2ea60
RBP: 000000197c5169fc R08: ffffffff8fa157f7 R09: 1ffffffff1f42afe
R10: dffffc0000000000 R11: fffffbfff1f42aff R12: 000000197c51da21
R13: 0000000000007025 R14: ffff8880b873b9c0 R15: 0000000000000000
FS: 00007f9bcaedcc80(0000) GS:ffff888125d41000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9bcb1958f0 CR3: 000000003546e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000000000c8
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
enqueue_entity+0x5f/0x1120 kernel/sched/fair.c:5331
enqueue_task_fair+0x25a/0x1470 kernel/sched/fair.c:6985
enqueue_task+0x75/0x420 kernel/sched/core.c:2084
activate_task kernel/sched/core.c:2126 [inline]
ttwu_do_activate+0x1ee/0x8b0 kernel/sched/core.c:3746
ttwu_queue kernel/sched/core.c:4014 [inline]
try_to_wake_up+0x745/0x1290 kernel/sched/core.c:4342
kick_pool+0x47d/0x640 kernel/workqueue.c:1279
__queue_work+0xcdf/0xfb0 kernel/workqueue.c:2339
call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1793 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x646/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x283/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:page_table_check_set+0x2f6/0x730 mm/page_table_check.c:120
Code: be 04 00 00 00 e8 aa d8 f4 ff 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 55 01 00 00 44 8b 3b <31> ff 44 89 fe e8 10 17 91 ff 45 85 ff 0f 85 5e 02 00 00 48 8d 7b
RSP: 0000:ffffc9000b7f7938 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88802267b188 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88802267b188
RBP: ffff88802267b140 R08: ffff88802267b18b R09: 1ffff110044cf631
R10: dffffc0000000000 R11: ffffed10044cf632 R12: 0000000000000001
R13: 0000000000000000 R14: 000000000013ff04 R15: 0000000000000000
page_table_check_ptes_set include/linux/page_table_check.h:76 [inline]
set_ptes include/linux/pgtable.h:292 [inline]
set_pte_range+0x6a5/0x700 mm/memory.c:5348
filemap_map_order0_folio mm/filemap.c:3724 [inline]
filemap_map_pages+0xf33/0x1740 mm/filemap.c:3779
do_fault_around mm/memory.c:5566 [inline]
do_read_fault mm/memory.c:5599 [inline]
do_fault mm/memory.c:5742 [inline]
do_pte_missing mm/memory.c:4269 [inline]
handle_pte_fault mm/memory.c:6087 [inline]
__handle_mm_fault+0x3687/0x5620 mm/memory.c:6230
handle_mm_fault+0x40a/0x8e0 mm/memory.c:6399
do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f9bcb1958f0
Code: 68 89 00 00 00 e9 50 f7 ff ff ff 25 12 fe 0a 00 68 8a 00 00 00 e9 40 f7 ff ff ff 25 0a fe 0a 00 68 8b 00 00 00 e9 30 f7 ff ff 25 02 fe 0a 00 68 8c 00 00 00 e9 20 f7 ff ff ff 25 fa fd 0a 00
RSP: 002b:00007ffdbe3053a8 EFLAGS: 00010202
RAX: 000055aceaf16910 RBX: 000055aceaf18850 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 000055aceaf24910 RDI: 000000000000000b
RBP: 000055aceaf17c60 R08: 00007f9bcb177b60 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 000055aceaf16910
R13: 000055aceaf16c30 R14: 0000000000000000 R15: 00007f9bcb246460