INFO: task hung in relay

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision
b5ab6595	assessment-security	DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	INFO: task hung in relay_close (2)	2026/05/23 22:34	2026/05/23 22:34	2026/05/23 23:35	c69befb3

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in relay_close block trace	1				3	496d	516d	0/29	auto-obsoleted due to no activity on 2025/08/14 10:47

Kernel

Title

Rank 🛈

upstream

INFO: task hung in relay_close block trace

496d

516d

0/29

auto-obsoleted due to no activity on 2025/08/14 10:47

INFO: task syz.3.3567:13051 blocked for more than 143 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.3567 state:D stack:27784 pid:13051 tgid:13050 ppid:10404 task_flags:0x400140 flags:0x00080000 Call Trace: <TASK> context_switch kernel/sched/core.c:5504 [inline] __schedule+0x125c/0x6730 kernel/sched/core.c:7228 __schedule_loop kernel/sched/core.c:7307 [inline] schedule+0xdd/0x390 kernel/sched/core.c:7322 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7379 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0xccc/0x1bd0 kernel/locking/mutex.c:821 relay_close kernel/relay.c:657 [inline] relay_close+0x32/0x4b0 kernel/relay.c:649 blk_trace_free+0x37/0x170 kernel/trace/blktrace.c:471 blk_trace_cleanup kernel/trace/blktrace.c:539 [inline] __blk_trace_remove+0x81/0x180 kernel/trace/blktrace.c:552 blk_trace_remove kernel/trace/blktrace.c:562 [inline] blk_trace_ioctl+0x26b/0x320 kernel/trace/blktrace.c:952 blkdev_common_ioctl+0x170c/0x2b80 block/ioctl.c:717 blkdev_ioctl+0x43b/0x6f0 block/ioctl.c:791 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdc3879ce59 RSP: 002b:00007fdc39592028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fdc38a15fa0 RCX: 00007fdc3879ce59 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000006 RBP: 00007fdc38832d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdc38a16038 R14: 00007fdc38a15fa0 R15: 00007fff2cec8998 </TASK> INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x141/0x190 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xcb1/0x1030 kernel/hung_task.c:561 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK>

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/06/17 20:35	upstream	5b33fc6492a7	b62b3ded	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-qemu-gce-upstream-auto	INFO: task hung in relay_close
2026/04/30 08:04	upstream	57b8e2d666a3	005438fc	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce	INFO: task hung in relay_close

Crashes (2):

Assets (help?)