INFO: task syz.2.17:492 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17 state:D stack:0 pid:492 tgid:489 ppid:478 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xdb5/0x17a0 kernel/sched/core.c:6723
__schedule_loop kernel/sched/core.c:6800 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:6815
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:6872
rwsem_down_write_slowpath+0x780/0x1060 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x119/0x130 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:815 [inline]
vfs_utimes+0x396/0x570 fs/utimes.c:65
do_utimes_path fs/utimes.c:99 [inline]
do_utimes+0x1bc/0x2a0 fs/utimes.c:145
__do_sys_utimensat fs/utimes.c:164 [inline]
__se_sys_utimensat fs/utimes.c:148 [inline]
__x64_sys_utimensat+0x150/0x230 fs/utimes.c:148
x64_sys_call+0x24df/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:281
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: 0033:0x7f02c998f6c9
RSP: 002b:00007f02c97de038 EFLAGS: 00000246 ORIG_RAX: 0000000000000118
RAX: ffffffffffffffda RBX: 00007f02c9be6090 RCX: 00007f02c998f6c9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f02c9a11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f02c9be6128 R14: 00007f02c9be6090 R15: 00007ffd23160d28
INFO: task syz.3.18:509 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.18 state:D stack:0 pid:509 tgid:505 ppid:495 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xdb5/0x17a0 kernel/sched/core.c:6723
__schedule_loop kernel/sched/core.c:6800 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:6815
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:6872
rwsem_down_write_slowpath+0x780/0x1060 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x119/0x130 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:815 [inline]
vfs_utimes+0x396/0x570 fs/utimes.c:65
do_utimes_path fs/utimes.c:99 [inline]
do_utimes+0x1bc/0x2a0 fs/utimes.c:145
__do_sys_utimensat fs/utimes.c:164 [inline]
__se_sys_utimensat fs/utimes.c:148 [inline]
__x64_sys_utimensat+0x150/0x230 fs/utimes.c:148
x64_sys_call+0x24df/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:281
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: 0033:0x7fb748b8f6c9
RSP: 002b:00007fb749a29038 EFLAGS: 00000246 ORIG_RAX: 0000000000000118
RAX: ffffffffffffffda RBX: 00007fb748de6090 RCX: 00007fb748b8f6c9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007fb748c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb748de6128 R14: 00007fb748de6090 R15: 00007ffe8b54d738
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 6db47c7f0713d402c77c1d3d1693e6c538243aeb
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:223 [inline]
watchdog+0xbd4/0xc20 kernel/hung_task.c:379
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 6db47c7f0713d402c77c1d3d1693e6c538243aeb
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:asm_sysvec_call_function_single+0x0/0x30 arch/x86/include/asm/idtentry.h:709
Code: ca fc 6a ff e8 e1 04 00 00 48 89 c4 48 8d 6c 24 01 48 89 e7 e8 21 53 e0 ff e9 0c 06 00 00 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 0f 01 ca fc 6a ff e8 b1 04 00 00 48 89 c4 48 8d 6c 24
RSP: 0018:ffffc900001a7dd8 EFLAGS: 000000c2
RAX: ffff8881f6f00000 RBX: ffff888103650000 RCX: ffffffff85407a5e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000042dfc
RBP: ffffc900001a7e00 R08: ffff8881f6f396b3 R09: 1ffff1103ede72d6
R10: dffffc0000000000 R11: ffffed103ede72d7 R12: 1ffff110206ca000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8763be28
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffafd5b3d58 CR3: 00000001297f2000 CR4: 00000000003526b0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:112 [inline]
default_idle+0x17/0x30 arch/x86/kernel/process.c:753
arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:790
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
start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
common_startup_64+0x13b/0x157