INFO: task syz-executor.0:13396 blocked for more than 143 seconds.
      Not tainted 5.10.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:26864 pid:13396 ppid:  8478 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3774 [inline]
 __schedule+0x92c/0xcb0 kernel/sched/core.c:4523
 schedule+0x14b/0x200 kernel/sched/core.c:4601
 schedule_timeout+0x15c/0x250 kernel/time/timer.c:1876
 gfs2_gl_hash_clear+0x128/0x380 fs/gfs2/glock.c:1989
 gfs2_fill_super+0x2aa7/0x3db0 fs/gfs2/ops_fstype.c:1233
 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1344
 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1256
 vfs_get_tree+0x88/0x270 fs/super.c:1549
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x17b4/0x2a20 fs/namespace.c:3205
 do_mount fs/namespace.c:3218 [inline]
 __do_sys_mount fs/namespace.c:3426 [inline]
 __se_sys_mount+0x28c/0x320 fs/namespace.c:3403
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x46090a
Code: Unable to access opcode bytes at RIP 0x4608e0.
RSP: 002b:00007fbcb5041a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbcb5041b20 RCX: 000000000046090a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fbcb5041ae0
RBP: 00007fbcb5041ae0 R08: 00007fbcb5041b20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20

Showing all locks held in the system:
1 lock held by khungtaskd/1638:
 #0: ffffffff8bae6800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151
1 lock held by systemd-journal/4881:
1 lock held by in:imklog/8151:
 #0: ffff888011db3770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24b/0x2e0 fs/file.c:932
1 lock held by syz-executor.0/13396:
 #0: ffff888016bbc0e0 (&type->s_umount_key#63/1){+.+.}-{3:3}, at: alloc_super+0x1a7/0x860 fs/super.c:229

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1638 Comm: khungtaskd Not tainted 5.10.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x137/0x1be lib/dump_stack.c:118
 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xcb0/0xcf0 kernel/hung_task.c:295
 kthread+0x36b/0x390 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 470 Comm: kworker/u4:4 Not tainted 5.10.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__preempt_count_add kernel/rcu/tree.c:1098 [inline]
RIP: 0010:rcu_is_watching+0x2/0xb0 kernel/rcu/tree.c:1101
Code: 48 8b 04 25 28 00 00 00 48 3b 44 24 10 75 06 48 83 c4 18 5b c3 e8 be 20 db 07 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 41 57 <41> 56 53 65 83 05 3f 68 a0 7e 01 e8 0e 30 db 07 89 c3 83 f8 08 73
RSP: 0018:ffffc9000255fc78 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffff8880208bb340 RCX: ffff88801232b480
RDX: ffff88801232b480 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888065418c00 R08: ffffffff891f060f R09: fffffbfff1d92c61
R10: fffffbfff1d92c61 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88806541c000 R14: ffff8880208bb350 R15: 00000000000001e2
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa7b32c1018 CR3: 0000000011b2d000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rcu_read_unlock include/linux/rcupdate.h:691 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:411 [inline]
 batadv_nc_worker+0x215/0x5c0 net/batman-adv/network-coding.c:718
 process_one_work+0x789/0xfc0 kernel/workqueue.c:2272
 worker_thread+0xaa4/0x1460 kernel/workqueue.c:2418
 kthread+0x36b/0x390 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296