INFO: task syz.2.456:1713 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.456 state:D stack:0 pid:1713 tgid:1712 ppid:296 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
request_wait_answer fs/fuse/dev.c:476 [inline]
__fuse_request_send fs/fuse/dev.c:491 [inline]
__fuse_simple_request+0xdb1/0x1980 fs/fuse/dev.c:586
fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
fuse_rmdir+0x2c7/0x1a50 fs/fuse/dir.c:1290
vfs_rmdir+0x3dd/0x560 fs/namei.c:4340
do_rmdir+0x26a/0x560 fs/namei.c:4399
__do_sys_rmdir fs/namei.c:4418 [inline]
__se_sys_rmdir fs/namei.c:4416 [inline]
__x64_sys_rmdir+0x4b/0x60 fs/namei.c:4416
x64_sys_call+0xaf7/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:85
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: 0033:0x7f9aa418eec9
RSP: 002b:00007f9aa4fbb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f9aa43e5fa0 RCX: 00007f9aa418eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007f9aa4211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9aa43e6038 R14: 00007f9aa43e5fa0 R15: 00007ffc7deea5a8
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 16eb8ae5e642bf775817a16571acbfa82b92c919
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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: 8273 Comm: syz.4.2684 Not tainted syzkaller #0 16eb8ae5e642bf775817a16571acbfa82b92c919
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:memset_orig+0x29/0xb0 arch/x86/lib/memset_64.S:62
Code: 90 66 0f 1f 00 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01 48 0f af c1 41 89 f9 41 83 e1 07 75 70 48 89 d1 48 c1 e9 06 <74> 35 0f 1f 44 00 00 48 ff c9 48 89 07 48 89 47 08 48 89 47 10 48
RSP: 0018:ffffc900010eebd0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000018 RCX: 0000000000000000
RDX: 0000000000000018 RSI: 0000000000000000 RDI: ffffc900010eec80
RBP: ffffc900010eebf0 R08: ffffc900010eec97 R09: 0000000000000000
R10: ffffc900010eec80 R11: fffff5200021dd93 R12: ffff0a0000000509
R13: 00000000000000d0 R14: 0000000000000000 R15: ffffc900010eec80
FS: 00007f9bbf0366c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001b00 CR3: 000000012332e000 CR4: 00000000003526b0
Call Trace:
number+0x27b/0xf80 lib/vsprintf.c:461
vsnprintf+0x1380/0x1aa0 lib/vsprintf.c:2869
sprintf+0xda/0x120 lib/vsprintf.c:3007
print_time kernel/printk/printk.c:1387 [inline]
info_print_prefix+0x183/0x480 kernel/printk/printk.c:1416
record_print_text+0x155/0x430 kernel/printk/printk.c:1465
printk_get_next_message+0x273/0x930 kernel/printk/printk.c:3037
console_emit_next_record kernel/printk/printk.c:3105 [inline]
console_flush_all+0x3a4/0xaa0 kernel/printk/printk.c:3239
__console_flush_and_unlock kernel/printk/printk.c:3298 [inline]
console_unlock+0xe9/0x270 kernel/printk/printk.c:3338
vprintk_emit+0x27c/0x640 kernel/printk/printk.c:2462
vprintk_default+0x2a/0x40 kernel/printk/printk.c:2477
vprintk+0x93/0xa0 kernel/printk/printk_safe.c:73
_printk+0xd0/0x120 kernel/printk/printk.c:2487
p9_fd_create+0x27c/0x4c0 net/9p/trans_fd.c:1101
p9_client_create+0x800/0x1190 net/9p/client.c:1017
v9fs_session_init+0x1e1/0x1820 fs/9p/v9fs.c:410
v9fs_mount+0xd7/0xa00 fs/9p/vfs_super.c:122
legacy_get_tree+0x106/0x1b0 fs/fs_context.c:662
vfs_get_tree+0x9e/0x290 fs/super.c:1817
do_new_mount+0x251/0xb40 fs/namespace.c:3537
path_mount+0x688/0x1050 fs/namespace.c:3864
do_mount fs/namespace.c:3877 [inline]
__do_sys_mount fs/namespace.c:4087 [inline]
__se_sys_mount+0x2bd/0x480 fs/namespace.c:4064
__x64_sys_mount+0xc3/0xf0 fs/namespace.c:4064
x64_sys_call+0x2021/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:166
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: 0033:0x7f9bbe18eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9bbf036038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9bbe3e5fa0 RCX: 00007f9bbe18eec9
RDX: 0000200000000040 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f9bbe211f91 R08: 0000200000000480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9bbe3e6038 R14: 00007f9bbe3e5fa0 R15: 00007ffe3b44d208