INFO: task syz-executor.1:19931 blocked for more than 143 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26576 pid:19931 ppid: 6555 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xc8d/0x1270 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
schedule_timeout+0xac/0x300 kernel/time/timer.c:1857
do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
__flush_work kernel/workqueue.c:3083 [inline]
__cancel_work_timer+0x562/0x710 kernel/workqueue.c:3170
p9_conn_destroy net/9p/trans_fd.c:886 [inline]
p9_fd_close+0x248/0x3c0 net/9p/trans_fd.c:921
p9_client_destroy+0xde/0x700 net/9p/client.c:1090
v9fs_session_close+0x4d/0x200 fs/9p/v9fs.c:498
v9fs_kill_super+0x58/0x90 fs/9p/vfs_super.c:224
deactivate_locked_super+0xa7/0xf0 fs/super.c:335
v9fs_mount+0x70e/0x870 fs/9p/vfs_super.c:205
legacy_get_tree+0xea/0x180 fs/fs_context.c:610
vfs_get_tree+0x86/0x270 fs/super.c:1498
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x1986/0x2c30 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount+0x308/0x3c0 fs/namespace.c:3516
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007f140c5b7188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665f9
RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00000000004bfcc4 R08: 0000000020000580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007fff5d5ad23f R14: 00007f140c5b7300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8c91c140 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by systemd-journal/2967:
1 lock held by in:imklog/6243:
#0: ffff88801bbc1270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
2 locks held by kworker/0:4/8492:
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9000ca77d20 ((work_completion)(&m->rq)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc54/0xca0 kernel/hung_task.c:295
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7621 Comm: kworker/u4:5 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_preemption_disabled+0x4c/0x190 lib/smp_processor_id.c:16
Code: 0f 1f 44 00 00 65 8b 1d e2 0b 09 76 65 8b 2d 53 66 09 76 89 ee 81 e6 ff ff ff 7f 31 ff 0f 1f 44 00 00 81 e5 ff ff ff 7f 74 2a <0f> 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 17
RSP: 0018:ffffc90006267970 EFLAGS: 00000002
RAX: 91e01095da6d5a00 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed10173864a2
R10: ffffed10173864a2 R11: 0000000000000000 R12: 0000000000000246
R13: ffff888063895580 R14: ffffffff8a4f00e0 R15: ffffffff8ab41b00
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d345c8000 CR3: 0000000071b8f000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline]
lock_is_held_type+0x107/0x190 kernel/locking/lockdep.c:5669
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
trace_lock_release+0x4f/0x150 include/trace/events/lock.h:58
lock_release+0x82/0x810 kernel/locking/lockdep.c:5636
rcu_read_unlock include/linux/rcupdate.h:720 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:414 [inline]
batadv_nc_worker+0x251/0x5b0 net/batman-adv/network-coding.c:721
process_one_work+0x853/0x1140 kernel/workqueue.c:2297
worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
5: 65 8b 1d e2 0b 09 76 mov %gs:0x76090be2(%rip),%ebx # 0x76090bee
c: 65 8b 2d 53 66 09 76 mov %gs:0x76096653(%rip),%ebp # 0x76096666
13: 89 ee mov %ebp,%esi
15: 81 e6 ff ff ff 7f and $0x7fffffff,%esi
1b: 31 ff xor %edi,%edi
1d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
22: 81 e5 ff ff ff 7f and $0x7fffffff,%ebp
28: 74 2a je 0x54
* 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction
2f: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
36: 00 00
38: 48 3b 44 24 08 cmp 0x8(%rsp),%rax
3d: 0f .byte 0xf
3e: 85 17 test %edx,(%rdi)