INFO: task hung in bpf_map_offload_map

INFO: task hung in bpf_map_offload_map_free (2)

Status: auto-obsoleted due to no activity on 2025/01/29 01:48
Subsystems: bpf
[Documentation on labels]
First crash: 132d, last: 132d

▶ ▼ Similar bugs (2)

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	INFO: task hung in bpf_map_offload_map_free				1	193d	193d	0/3	auto-obsoleted due to no activity on 2024/12/08 22:49
upstream	INFO: task hung in bpf_map_offload_map_free bpf				10	244d	376d	0/28	auto-obsoleted due to no activity on 2024/10/08 07:54

Sample crash report:

INFO: task kworker/u8:1:12 blocked for more than 149 seconds.
      Not tainted 6.12.0-rc4-syzkaller-00971-gd30b56c8666d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:22128 pid:12    tgid:12    ppid:2      flags:0x00004000
Workqueue: events_unbound bpf_map_free_deferred
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6782
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 bpf_map_offload_map_free+0x14/0x80 kernel/bpf/offload.c:566
 bpf_map_free kernel/bpf/syscall.c:744 [inline]
 bpf_map_free_deferred+0xe4/0x100 kernel/bpf/syscall.c:768
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/10/31 01:41	net-next	d30b56c8666d	fb888278	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-net-kasan-gce	INFO: task hung in bpf_map_offload_map_free

* ~~Struck through~~ repros no longer work on HEAD.