INFO: task syz-executor.2:11405 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.2  state:D stack:25688 pid:11405 ppid:  8468 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:00007f396c847a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f396c847b20 RCX: 000000000046090a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f396c847ae0
RBP: 00007f396c847ae0 R08: 00007f396c847b20 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/4885:
1 lock held by in:imklog/8151:
 #0: ffff888013e8caf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24b/0x2e0 fs/file.c:932
1 lock held by syz-executor.2/11405:
 #0: ffff888066adc0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x1a7/0x860 fs/super.c:229

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

NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 860 Comm: kworker/u4:6 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:check_wait_context kernel/locking/lockdep.c:4526 [inline]
RIP: 0010:__lock_acquire+0x66f/0x6250 kernel/locking/lockdep.c:4787
Code: 26 00 00 66 41 83 3c 24 00 0f 88 b5 04 00 00 66 85 db 41 0f 44 de 89 5c 24 6c 90 45 89 fc 41 ff cf 0f 88 ad 00 00 00 45 89 fe <41> 83 ff 31 0f 83 82 00 00 00 4b 8d 04 b6 4d 8d b4 c5 30 09 00 00
RSP: 0018:ffffc90003b4f960 EFLAGS: 00000046
RAX: ffff8880130023c0 RBX: 0000000000000006 RCX: ffffffff8158d47d
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff8ec983c8
RBP: ffffc90003b4fb10 R08: dffffc0000000000 R09: fffffbfff1d9307a
R10: fffffbfff1d9307a R11: 0000000000000000 R12: 0000000000000001
R13: ffff888013001a40 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6919682020 CR3: 0000000011b30000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5442
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 batadv_nc_purge_paths+0xe0/0x3f0 net/batman-adv/network-coding.c:441
 batadv_nc_worker+0x32e/0x5c0 net/batman-adv/network-coding.c:721
 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