INFO: task syz.4.6487:20525 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.6487 state:D stack:0 pid:20525 tgid:20524 ppid:16848 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_do_getattr+0x350/0x630 fs/fuse/dir.c:1588
fuse_update_get_attr+0x8cd/0x2600 fs/fuse/dir.c:1644
fuse_getattr+0x3bf/0x630 fs/fuse/dir.c:2495
vfs_getattr_nosec+0x25b/0x2f0 fs/stat.c:166
vfs_getattr fs/stat.c:207 [inline]
vfs_statx_path+0x70/0x300 fs/stat.c:251
vfs_statx+0x130/0x200 fs/stat.c:315
vfs_fstatat fs/stat.c:341 [inline]
vfs_lstat include/linux/fs.h:3392 [inline]
__do_sys_newlstat fs/stat.c:491 [inline]
__se_sys_newlstat+0xd7/0x360 fs/stat.c:485
__x64_sys_newlstat+0x5f/0x80 fs/stat.c:485
x64_sys_call+0x1b6f/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:7
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: 0033:0x7fc9b918eec9
RSP: 002b:00007fc9b9fa0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 00007fc9b93e5fa0 RCX: 00007fc9b918eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000b80
RBP: 00007fc9b9211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc9b93e6038 R14: 00007fc9b93e5fa0 R15: 00007fff22872fe8
INFO: task syz.4.6487:20532 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.6487 state:D stack:0 pid:20532 tgid:20524 ppid:16848 flags:0x00404004
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_flush+0x909/0x1d50 fs/fuse/file.c:584
filp_flush fs/open.c:1550 [inline]
filp_close+0xc0/0x160 fs/open.c:1563
__range_close fs/file.c:710 [inline]
__close_range+0x50e/0x6c0 fs/file.c:767
__do_sys_close_range fs/open.c:1616 [inline]
__se_sys_close_range fs/open.c:1613 [inline]
__x64_sys_close_range+0x7e/0x90 fs/open.c:1613
x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
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: 0033:0x7fc9b918eec9
RSP: 002b:00007fc9b9f7f038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007fc9b93e6090 RCX: 00007fc9b918eec9
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007fc9b9211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc9b93e6128 R14: 00007fc9b93e6090 R15: 00007fff22872fe8
INFO: task syz.4.6487:20536 blocked for more than 124 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.6487 state:D stack:0 pid:20536 tgid:20536 ppid:20532 flags:0x00404006
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_flush+0x909/0x1d50 fs/fuse/file.c:584
filp_flush fs/open.c:1550 [inline]
filp_close+0xc0/0x160 fs/open.c:1563
close_files fs/file.c:425 [inline]
put_files_struct+0x1b5/0x330 fs/file.c:440
exit_files+0x84/0xa0 fs/file.c:457
do_exit+0x985/0x2630 kernel/exit.c:948
do_group_exit+0x22a/0x300 kernel/exit.c:1095
get_signal+0x139d/0x14f0 kernel/signal.c:2933
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]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fc9b91c1785
RSP: 002b:00007fc9b9f7ef80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007fc9b93e6090 RCX: 00007fc9b91c1785
RDX: 00007fc9b9f7efc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc9b9211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fc9b93e6128 R14: 00007fc9b93e6090 R15: 00007fff22872fe8
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 1f5813a52420658c51670c32aa0b3f2b32c06bdf
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 99 Comm: klogd Not tainted syzkaller #0 1f5813a52420658c51670c32aa0b3f2b32c06bdf
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x280/0x2a0 mm/kasan/generic.c:189
Code: 03 eb 13 4f 8d 5c 33 04 eb 0c 4f 8d 5c 33 05 eb 05 4f 8d 5c 33 06 4d 89 dd 4d 85 db 0f 84 51 ff ff ff 4d 01 d1 4d 39 cd 75 11 <41> 83 e0 07 45 0f be 09 45 39 c8 0f 8c 38 ff ff ff 0f b6 d2 e8 a7
RSP: 0018:ffffc90000e2f6d8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff858f584f
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000e2f740
RBP: ffffc90000e2f700 R08: ffffc90000e2f743 R09: fffff520001c5ee8
R10: dffffc0000000000 R11: fffff520001c5ee8 R12: 1ffff920001c5ee4
R13: fffff520001c5ee8 R14: fffff520001c5ee9 R15: 1ffff920001c5ee8
FS: 00007f22dc547c80(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd4e1bb3ad8 CR3: 000000010bf90000 CR4: 00000000003526b0
DR0: ffffffffffffffff DR1: 00000000000001fa DR2: 0000000000000085
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1301 [inline]
queued_spin_trylock include/asm-generic/qspinlock.h:97 [inline]
do_raw_spin_trylock include/linux/spinlock.h:193 [inline]
__raw_spin_trylock include/linux/spinlock_api_smp.h:89 [inline]
_raw_spin_trylock+0xaf/0x130 kernel/locking/spinlock.c:138
avc_reclaim_node security/selinux/avc.c:472 [inline]
avc_alloc_node+0x15c/0x510 security/selinux/avc.c:506
avc_insert security/selinux/avc.c:619 [inline]
avc_compute_av+0xeb/0x770 security/selinux/avc.c:995
avc_perm_nonode+0xc8/0x1b0 security/selinux/avc.c:1118
avc_has_perm_noaudit+0x21c/0x360 security/selinux/avc.c:1161
avc_has_perm+0xc2/0x220 security/selinux/avc.c:1196
sock_has_perm security/selinux/hooks.c:4625 [inline]
selinux_socket_sendmsg+0x284/0x380 security/selinux/hooks.c:4974
security_socket_sendmsg+0x56/0xd0 security/security.c:4647
__sock_sendmsg net/socket.c:742 [inline]
__sys_sendto+0x3c4/0x6f0 net/socket.c:2217
__do_sys_sendto net/socket.c:2229 [inline]
__se_sys_sendto net/socket.c:2225 [inline]
__x64_sys_sendto+0xe9/0x100 net/socket.c:2225
x64_sys_call+0x2c2c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:45
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: 0033:0x7f22dc697407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffef9824970 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f22dc547c80 RCX: 00007f22dc697407
RDX: 0000000000000050 RSI: 00007ffef9824ab0 RDI: 0000000000000003
RBP: 00007ffef9824ee0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffef9824ef8
R13: 00007ffef9824ab0 R14: 0000000000000035 R15: 00007ffef9824ab0