INFO: task syz.1.1203:4033 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1203 state:D stack:0 pid:4033 tgid:4032 ppid:288 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: 0033:0x7fd036b8eba9
RSP: 002b:00007fd037a8d038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fd036dd5fa0 RCX: 00007fd036b8eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007fd036c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd036dd6038 R14: 00007fd036dd5fa0 R15: 00007ffe8f75a4f8
INFO: task syz.1.1203:4034 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1203 state:D stack:0 pid:4034 tgid:4032 ppid:288 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: 0033:0x7fd036b8eba9
RSP: 002b:00007fd037a6c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fd036dd6090 RCX: 00007fd036b8eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007fd036c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd036dd6128 R14: 00007fd036dd6090 R15: 00007ffe8f75a4f8
INFO: task syz.0.1269:4274 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1269 state:D stack:0 pid:4274 tgid:4273 ppid:289 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: 0033:0x7f536798eba9
RSP: 002b:00007f53688ee038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f5367bd5fa0 RCX: 00007f536798eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f5367a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5367bd6038 R14: 00007f5367bd5fa0 R15: 00007ffde73a8588
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 7889a62797c5970a6d86d60f5314b8c2dceacd81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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+0x2c7/0x370 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 7889a62797c5970a6d86d60f5314b8c2dceacd81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:update_load_avg+0xc4a/0x19a0 kernel/sched/fair.c:4929
Code: 00 bb 01 00 00 00 49 bd 00 00 00 00 00 fc ff df 4c 8b 65 d0 0f 1f 44 00 00 0f 1f 44 00 00 48 8b 85 78 ff ff ff 42 80 3c 28 00 <44> 8b 75 a8 74 09 48 8b 7d a0 e8 c7 0f 7f 00 41 f6 c6 04 0f 84 59
RSP: 0018:ffffc90000007c08 EFLAGS: 00000046
RAX: 1ffff1102731cf18 RBX: 0000000000000000 RCX: 0f74dcd82ab66b00
RDX: 0000000000000110 RSI: dffffc0000000000 RDI: ffff8881f6e4fc9c
RBP: ffffc90000007c90 R08: 0000000000000000 R09: 1ffff1102731cf1b
R10: dffffc0000000000 R11: ffff8881398e78dc R12: ffff8881f6e4fc00
R13: dffffc0000000000 R14: ffff88813142fd10 R15: 1ffff11026285fa2
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd92b31f88 CR3: 00000001082ca000 CR4: 00000000003526b0
Call Trace:
__update_blocked_fair kernel/sched/fair.c:10092 [inline]
sched_balance_update_blocked_averages+0xb73/0x1320 kernel/sched/fair.c:10185
update_nohz_stats kernel/sched/fair.c:12876 [inline]
_nohz_idle_balance+0x31e/0x5a0 kernel/sched/fair.c:12944
nohz_idle_balance kernel/sched/fair.c:13001 [inline]
sched_balance_softirq+0x8a/0x170 kernel/sched/fair.c:13229
handle_softirqs+0x1ab/0x630 kernel/softirq.c:621
__do_softirq kernel/softirq.c:659 [inline]
invoke_softirq kernel/softirq.c:476 [inline]
__irq_exit_rcu+0x48/0xc0 kernel/softirq.c:708
irq_exit_rcu+0xd/0x30 kernel/softirq.c:720
instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
sysvec_call_function_single+0x7f/0x90 arch/x86/kernel/smp.c:266
asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:709
RIP: 0010:pv_native_safe_halt+0x17/0x20 arch/x86/kernel/paravirt.c:106
Code: cc cc cc b8 b3 e5 03 69 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 f1 3a 00 f3 0f 1e fa 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff87207da0 EFLAGS: 000002c6
RAX: ffff8881f6e00000 RBX: ffffffff87215540 RCX: ffffffff858c60ae
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 00000000005557dc
RBP: ffffffff87207da0 R08: ffff8881f6e39733 R09: 1ffff1103edc72e6
R10: dffffc0000000000 R11: ffffed103edc72e7 R12: 1ffffffff0e42aa8
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87cb0be8
arch_safe_halt arch/x86/include/asm/paravirt.h:112 [inline]
default_idle+0x17/0x30 arch/x86/kernel/process.c:754
arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:791
default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1a0/0x470 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