INFO: task syz.0.592:2091 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.592 state:D stack:0 pid:2091 tgid:2091 ppid:290 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x1322/0x1df0 kernel/sched/core.c:7791
__schedule_loop kernel/sched/core.c:7872 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7887
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:419 [inline]
do_coredump+0x7cf/0x2bd0 fs/coredump.c:581
get_signal+0x11fd/0x14f0 kernel/signal.c:2918
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
irqentry_exit_to_user_mode+0x4e/0xb0 kernel/entry/common.c:231
irqentry_exit+0x16/0x60 kernel/entry/common.c:334
exc_page_fault+0x66/0xc0 arch/x86/mm/fault.c:1542
asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x200000000000
RSP: 002b:00007ffd0b5d7ab8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffffffffffff
RDX: 00007ffd0b5d7ac0 RSI: 00007ffd0b5d7bf0 RDI: 000000000000000b
RBP: 00007fbc71be7da0 R08: 0000001b2dd20000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00007fbc71be609c
R13: 00007fbc71be6090 R14: fffffffffffffffe R15: 00007ffd0b5d8180
INFO: task syz.0.592:2092 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.592 state:D stack:0 pid:2092 tgid:2091 ppid:290 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x1322/0x1df0 kernel/sched/core.c:7791
__schedule_loop kernel/sched/core.c:7872 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7887
super_lock+0x150/0x300 fs/super.c:115
super_lock_shared fs/super.c:140 [inline]
iterate_supers+0x8a/0x560 fs/super.c:934
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x308/0x7d0 fs/quota/quota.c:917
__x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:917
x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fbc7198efc9
RSP: 002b:00007fbc72760038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fbc71be5fa0 RCX: 00007fbc7198efc9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007fbc71a11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbc71be6038 R14: 00007fbc71be5fa0 R15: 00007ffd0b5d7f08
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:423
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
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: 0 Comm: swapper/0 Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x8/0x90 kernel/kcov.c:322
Code: 89 74 11 18 48 89 44 11 20 5d c3 cc cc cc cc cc 66 90 b8 ca d4 66 7e 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 <48> 8b 45 08 65 48 8b 0c 25 00 eb 04 00 65 8b 15 5c e7 7e 7e 81 e2
RSP: 0018:ffffffff87207cd0 EFLAGS: 00000046
RAX: 7fffffffffffffff RBX: 0000000000000037 RCX: ffffffff87215540
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffffff87207cd0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff0e40f54 R12: 1ffff1103edc5a9e
R13: 7fffffffffffffff R14: ffff8881f6e2d4f0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdcc423dd58 CR3: 0000000106ab6000 CR4: 00000000003526b0
Call Trace:
tick_nohz_idle_stop_tick+0x5bb/0x9f0 kernel/time/tick-sched.c:1242
cpuidle_idle_call kernel/sched/idle.c:183 [inline]
do_idle+0x19b/0x470 kernel/sched/idle.c:326
cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:424
rest_init+0x10b/0x130 init/main.c:748
start_kernel+0x46a/0x4bb init/main.c:1135
x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x6a/0x7b arch/x86/kernel/head64.c:488
common_startup_64+0x13b/0x157