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| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| linux-6.1 | INFO: task hung in fuse_set_nowrite | 1 | 1 | 96d | 96d | 0/3 | upstream: reported on 2025/07/06 03:33 | |||
| upstream | INFO: task hung in fuse_set_nowrite (2) fuse | 1 | 1 | 221d | 221d | 0/29 | auto-obsoleted due to no activity on 2025/06/01 13:09 | |||
| upstream | INFO: task hung in fuse_set_nowrite fuse | 1 | 1 | 391d | 391d | 0/29 | auto-obsoleted due to no activity on 2024/12/12 21:26 |
INFO: task syz.4.7863:23753 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.7863 state:D stack:0 pid:23753 tgid:23753 ppid:21977 flags:0x00004006
Call Trace:
<TASK>
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
fuse_set_nowrite+0x1cd/0x310 fs/fuse/dir.c:2129
fuse_sync_writes fs/fuse/file.c:526 [inline]
fuse_flush+0x60f/0x1d50 fs/fuse/file.c:561
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: 0033:0x7f1a2358eec9
RSP: 002b:00007ffc9b89e9b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f1a237e7da0 RCX: 00007f1a2358eec9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f1a237e7da0 R08: 0000000000000240 R09: 0000001c9b89ecaf
R10: 00007f1a237e7cb0 R11: 0000000000000246 R12: 000000000007f50d
R13: 00007f1a237e5fa0 R14: ffffffffffffffff R15: 00007ffc9b89ead0
</TASK>
INFO: task syz.4.7863:23757 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.7863 state:D stack:0 pid:23757 tgid:23753 ppid:21977 flags:0x00004004
Call Trace:
<TASK>
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_preempt_disabled+0x14/0x30 kernel/sched/core.c:7944
rwsem_down_write_slowpath+0x9e8/0x1b90 kernel/locking/rwsem.c:1239
__down_write_common kernel/locking/rwsem.c:1383 [inline]
__down_write kernel/locking/rwsem.c:1392 [inline]
down_write+0x152/0x2a0 kernel/locking/rwsem.c:1659
inode_lock include/linux/fs.h:817 [inline]
fuse_fsync+0x250/0x18f0 fs/fuse/file.c:639
vfs_fsync_range+0x180/0x3a0 fs/sync.c:194
generic_write_sync include/linux/fs.h:2894 [inline]
generic_file_write_iter+0x30c/0x430 mm/filemap.c:4348
fuse_cache_write_iter fs/fuse/file.c:1489 [inline]
fuse_file_write_iter+0x1676/0x2650 fs/fuse/file.c:1840
do_iter_readv_writev+0x628/0x810 fs/read_write.c:-1
vfs_writev+0x485/0xcf0 fs/read_write.c:1076
do_writev+0x14d/0x2d0 fs/read_write.c:1123
__do_sys_writev fs/read_write.c:1196 [inline]
__se_sys_writev fs/read_write.c:1193 [inline]
__x64_sys_writev+0x81/0x90 fs/read_write.c:1193
x64_sys_call+0x1fbb/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:21
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: 0033:0x7f1a2358eec9
RSP: 002b:00007f1a21fa1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f1a237e6180 RCX: 00007f1a2358eec9
RDX: 0000000000000001 RSI: 0000200000000000 RDI: 0000000000000008
RBP: 00007f1a23611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a237e6218 R14: 00007f1a237e6180 R15: 00007ffc9b89e858
</TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 98bacdaf52065bb91416bd5578e49f5aee2639ea
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
<TASK>
__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
</TASK>
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 98bacdaf52065bb91416bd5578e49f5aee2639ea
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:pv_native_safe_halt+0x17/0x20 arch/x86/kernel/paravirt.c:106
Code: cc cc cc b8 a8 33 19 43 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d c3 32 3a 00 f3 0f 1e fa 55 48 89 e5 fb f4 <5d> e9 d3 54 02 00 cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c2
RAX: ffff8881f6f00000 RBX: ffff888103668000 RCX: ffffffff858d20be
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000babf5c
RBP: ffffc900001a7e00 R08: ffff8881f6f39733 R09: 1ffff1103ede72e6
R10: dffffc0000000000 R11: ffffed103ede72e7 R12: 1ffff110206cd000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff87cb1ce8
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f97147b4198 CR3: 000000010629e000 CR4: 00000000003526b0
Call Trace:
<TASK>
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
start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
common_startup_64+0x13b/0x157
</TASK>
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/09/28 07:56 | android16-6.12 | e34340c0d860 | 001c9061 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-6-12-rust | INFO: task hung in fuse_set_nowrite |