INFO: task syz-executor.1:23746 blocked for more than 146 seconds.
      Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:28408 pid:23746 ppid:3623   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5194 [inline]
 __schedule+0xbd2/0x55b0 kernel/sched/core.c:6506
 schedule+0xda/0x1b0 kernel/sched/core.c:6582
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106
 __flush_work+0x58d/0xae0 kernel/workqueue.c:3073
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3160
 p9_conn_destroy net/9p/trans_fd.c:891 [inline]
 p9_fd_close+0x328/0x580 net/9p/trans_fd.c:921
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1040
 p9_client_create+0x728/0xf20 net/9p/client.c:1027
 v9fs_session_init+0x1e2/0x1810 fs/9p/v9fs.c:408
 v9fs_mount+0xba/0xc90 fs/9p/vfs_super.c:126
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1530
 do_new_mount fs/namespace.c:3040 [inline]
 path_mount+0x1326/0x1e20 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff05e68b5a9
RSP: 002b:00007ff05f74c168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff05e7ac050 RCX: 00007ff05e68b5a9
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007ff05e6e6580 R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc9386af8f R14: 00007ff05f74c300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xc6b/0xfc0 kernel/hung_task.c:369
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18326 Comm: kworker/u4:14 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:207
Code: 34 00 5d be 03 00 00 00 e9 86 2f 9e 07 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 39 db 85 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 6f 02 00 a9
RSP: 0018:ffffc9000640fc80 EFLAGS: 00000287
RAX: 0000000080000000 RBX: 0000000000000400 RCX: ffffffff88f7cea1
RDX: ffff888016ac3a80 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000004 R09: 0000000000000082
R10: 0000000000000400 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000082
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f74e3a31718 CR3: 000000000bc8e000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:406 [inline]
 batadv_nc_worker+0xe5/0xfa0 net/batman-adv/network-coding.c:719
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>