linux-kernel - [syzbot] [bpf?] INFO: task hung in bpf_prog_dev_bound

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Date: Sat, 08 Jun 2024 11:46:23 -0700
From: syzbot <syzbot+638395cff1c05c4a0128@...kaller.appspotmail.com>
To: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org, 
	daniel@...earbox.net, eddyz87@...il.com, haoluo@...gle.com, 
	john.fastabend@...il.com, jolsa@...nel.org, kpsingh@...nel.org, 
	linux-kernel@...r.kernel.org, martin.lau@...ux.dev, sdf@...gle.com, 
	song@...nel.org, syzkaller-bugs@...glegroups.com, yonghong.song@...ux.dev
Subject: [syzbot] [bpf?] INFO: task hung in bpf_prog_dev_bound_destroy

Hello,

syzbot found the following issue on:

HEAD commit:    8a92980606e3 Merge tag 'scsi-fixes' of git://git.kernel.or..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11e0f5ba980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=333ebe38d43c42e2
dashboard link: https://syzkaller.appspot.com/bug?extid=638395cff1c05c4a0128
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/fa5a3bdc8575/disk-8a929806.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9f37ced39a44/vmlinux-8a929806.xz
kernel image: https://storage.googleapis.com/syzbot-assets/604ed8ab462f/bzImage-8a929806.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+638395cff1c05c4a0128@...kaller.appspotmail.com

INFO: task kworker/0:5:5177 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc2-syzkaller-00235-g8a92980606e3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:5     state:D stack:20752 pid:5177  tgid:5177  ppid:2      flags:0x00004000
Workqueue: events bpf_prog_free_deferred
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 bpf_prog_dev_bound_destroy+0x76/0x590 kernel/bpf/offload.c:386
 bpf_prog_free_deferred+0x3c5/0x710 kernel/bpf/core.c:2784
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz-executor.2:12871 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc2-syzkaller-00235-g8a92980606e3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:24912 pid:12871 tgid:12870 ppid:12213  flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 do_ip_setsockopt+0x127d/0x3cd0 net/ipv4/ip_sockglue.c:1077


---
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