INFO: task syz-executor.1:30506 blocked for more than 143 seconds.
      Not tainted 6.2.0-syzkaller-12998-gc0927a7a5391 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:26272 pid:30506 ppid:5122   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5304 [inline]
 __schedule+0xcce/0x5b20 kernel/sched/core.c:6622
 schedule+0xde/0x1a0 kernel/sched/core.c:6698
 io_schedule+0xbe/0x130 kernel/sched/core.c:8884
 bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
 __wait_on_bit_lock+0x11f/0x1a0 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0xd9/0x110 kernel/sched/wait_bit.c:117
 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
 __lock_buffer fs/buffer.c:70 [inline]
 lock_buffer include/linux/buffer_head.h:400 [inline]
 write_dirty_buffer+0x15f/0x170 fs/buffer.c:2761
 fsync_buffers_list fs/buffer.c:745 [inline]
 sync_mapping_buffers+0x47e/0xdc0 fs/buffer.c:591
 ext4_sync_parent fs/ext4/fsync.c:70 [inline]
 ext4_fsync_nojournal fs/ext4/fsync.c:97 [inline]
 ext4_sync_file+0xce8/0x11c0 fs/ext4/fsync.c:170
 vfs_fsync_range+0x13e/0x230 fs/sync.c:188
 generic_write_sync include/linux/fs.h:2452 [inline]
 iomap_dio_complete+0x73a/0x920 fs/iomap/direct-io.c:128
 iomap_dio_rw+0x73/0xa0 fs/iomap/direct-io.c:687
 ext4_dio_write_iter fs/ext4/file.c:597 [inline]
 ext4_file_write_iter+0x94a/0x1740 fs/ext4/file.c:708
 call_write_iter include/linux/fs.h:1851 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x9ed/0xe10 fs/read_write.c:584
 ksys_write+0x12b/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7d0248c0f9
RSP: 002b:00007f7d0325e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7d025ac050 RCX: 00007f7d0248c0f9
RDX: 0000000000000e00 RSI: 0000000020001400 RDI: 0000000000000004
RBP: 00007f7d024e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8165fa2f R14: 00007f7d0325e300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.1:30507 blocked for more than 143 seconds.
      Not tainted 6.2.0-syzkaller-12998-gc0927a7a5391 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:26296 pid:30507 ppid:5122   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5304 [inline]
 __schedule+0xcce/0x5b20 kernel/sched/core.c:6622
 schedule+0xde/0x1a0 kernel/sched/core.c:6698
 io_schedule+0xbe/0x130 kernel/sched/core.c:8884
 bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
 __wait_on_bit_lock+0x11f/0x1a0 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0xd9/0x110 kernel/sched/wait_bit.c:117
 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
 __lock_buffer fs/buffer.c:70 [inline]
 lock_buffer include/linux/buffer_head.h:400 [inline]
 __sync_dirty_buffer+0x30e/0x380 fs/buffer.c:2780
 __ext4_handle_dirty_metadata+0x2b7/0x8e0 fs/ext4/ext4_jbd2.c:387
 ext4_handle_dirty_dirblock+0x371/0x470 fs/ext4/namei.c:438
 ext4_finish_convert_inline_dir fs/ext4/inline.c:1181 [inline]
 ext4_convert_inline_data_nolock+0xac1/0xf10 fs/ext4/inline.c:1258
 ext4_try_add_inline_entry+0x473/0x8d0 fs/ext4/inline.c:1331
 ext4_add_entry+0x80d/0xe30 fs/ext4/namei.c:2385
 ext4_add_nondir+0x90/0x290 fs/ext4/namei.c:2772
 ext4_create+0x380/0x4e0 fs/ext4/namei.c:2817
 lookup_open.isra.0+0x105a/0x1400 fs/namei.c:3416
 open_last_lookups fs/namei.c:3484 [inline]
 path_openat+0x975/0x2750 fs/namei.c:3712
 do_filp_open+0x1ba/0x410 fs/namei.c:3742
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_openat fs/open.c:1380 [inline]
 __se_sys_openat fs/open.c:1375 [inline]
 __x64_sys_openat+0x143/0x1f0 fs/open.c:1375
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7d0248c0f9
RSP: 002b:00007f7d0323d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7d025ac120 RCX: 00007f7d0248c0f9
RDX: 000000000000275a RSI: 0000000020000040 RDI: ffffffffffffff9c
RBP: 00007f7d024e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8165fa2f R14: 00007f7d0323d300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.1:30510 blocked for more than 144 seconds.
      Not tainted 6.2.0-syzkaller-12998-gc0927a7a5391 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:26504 pid:30510 ppid:5122   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5304 [inline]
 __schedule+0xcce/0x5b20 kernel/sched/core.c:6622
 schedule+0xde/0x1a0 kernel/sched/core.c:6698
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
 rwsem_down_write_slowpath+0x3e2/0x1220 kernel/locking/rwsem.c:1178
 __down_write_common kernel/locking/rwsem.c:1306 [inline]
 __down_write kernel/locking/rwsem.c:1315 [inline]
 down_write+0x1d2/0x200 kernel/locking/rwsem.c:1574
 inode_lock include/linux/fs.h:758 [inline]
 ext4_dio_write_iter fs/ext4/file.c:534 [inline]
 ext4_file_write_iter+0x1081/0x1740 fs/ext4/file.c:708
 call_write_iter include/linux/fs.h:1851 [inline]
 do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
 do_iter_write+0x182/0x700 fs/read_write.c:861
 vfs_iter_write+0x74/0xa0 fs/read_write.c:902
 iter_file_splice_write+0x743/0xc80 fs/splice.c:778
 do_splice_from fs/splice.c:856 [inline]
 direct_splice_actor+0x114/0x180 fs/splice.c:1023
 splice_direct_to_actor+0x335/0x8a0 fs/splice.c:978
 do_splice_direct+0x1ab/0x280 fs/splice.c:1066
 do_sendfile+0xb19/0x12c0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64 fs/read_write.c:1309 [inline]
 __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7d0248c0f9
RSP: 002b:00007f7d0321c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7d025ac1f0 RCX: 00007f7d0248c0f9
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000000004
RBP: 00007f7d024e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011f06 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8165fa2f R14: 00007f7d0321c300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c7957f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c7954f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffffffff8c796340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495
2 locks held by getty/4750:
 #0: ffff88802b7ec098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.2/5119:
 #0: ffff88807ccdc0e0 (&type->s_umount_key#70){++++}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
 #1: ffffffff8c7a1638 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
 #1: ffffffff8c7a1638 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x64a/0x770 kernel/rcu/tree_exp.h:989
1 lock held by syz-executor.0/5128:
 #0: ffff88801fd3a0e0 (&type->s_umount_key#70){++++}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
1 lock held by syz-executor.4/5137:
 #0: ffff8880225840e0 (&type->s_umount_key#70){++++}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
2 locks held by kworker/u4:0/5152:
3 locks held by kworker/0:4/5179:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
 #1: ffffc90004aefda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
 #2: ffffffff8c7a1638 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 #2: ffffffff8c7a1638 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:989
2 locks held by kworker/0:6/17481:
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
 #1: ffffc90014d1fda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/0:9/18983:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
 #1: ffffc90005887da8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/1:1/23368:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
 #1: ffffc9000533fda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
2 locks held by kworker/1:13/23372:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
 #1: ffffc900054afda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
3 locks held by syz-executor.1/30506:
 #0: ffff8880755c2ae8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x100 fs/file.c:1046
 #1: ffff88807acf0460 (sb_writers#4){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
 #2: ffff88808d3df258 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #2: ffff88808d3df258 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_dio_write_iter fs/ext4/file.c:534 [inline]
 #2: ffff88808d3df258 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_file_write_iter+0x1081/0x1740 fs/ext4/file.c:708
3 locks held by syz-executor.1/30507:
 #0: ffff88807acf0460 (sb_writers#4){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3473 [inline]
 #0: ffff88807acf0460 (sb_writers#4){.+.+}-{0:0}, at: path_openat+0x2716/0x2750 fs/namei.c:3712
 #1: ffff88808d3d8400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff88808d3d8400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: open_last_lookups fs/namei.c:3481 [inline]
 #1: ffff88808d3d8400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: path_openat+0x90f/0x2750 fs/namei.c:3712
 #2: ffff88808d3d80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
 #2: ffff88808d3d80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0x10c/0x8d0 fs/ext4/inline.c:1289
2 locks held by syz-executor.1/30510:
 #0: ffff88807acf0460 (sb_writers#4){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 #0: ffff88807acf0460 (sb_writers#4){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1309 [inline]
 #0: ffff88807acf0460 (sb_writers#4){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309
 #1: ffff88808d3df258 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff88808d3df258 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_dio_write_iter fs/ext4/file.c:534 [inline]
 #1: ffff88808d3df258 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_file_write_iter+0x1081/0x1740 fs/ext4/file.c:708

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-syzkaller-12998-gc0927a7a5391 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x316/0x3e0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x33f/0x460 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xe94/0x11e0 kernel/hung_task.c:379
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 17266 Comm: kworker/u4:1 Not tainted 6.2.0-syzkaller-12998-gc0927a7a5391 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_lock.part.0+0x61/0x1970 kernel/locking/lockdep.c:4594
Code: 48 c7 44 24 40 28 cc ee 8b 48 8d 04 13 48 c7 44 24 48 70 ce 65 81 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 04 f2 c7 40 08 00 f2 f2 f2 <c7> 40 0c 00 f2 f2 f2 c7 40 14 00 00 00 f3 c7 40 18 f3 f3 f3 f3 65
RSP: 0018:ffffc9001478fa38 EFLAGS: 00000016
RAX: fffff520028f1f4e RBX: 1ffff920028f1f4e RCX: 1ffffffff22a6306
RDX: dffffc0000000000 RSI: ffff888018ffc4e0 RDI: ffff888018ffba80
RBP: 0000000000000002 R08: 0000000000000000 R09: ffffffff914dfc5f
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888018ffc4e0
R13: 0000000000000002 R14: ffff888018ffc4b8 R15: ffffffff89e3ef40
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f99ed981bc8 CR3: 000000000c571000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 mark_lock kernel/locking/lockdep.c:4599 [inline]
 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4237
 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4255 [inline]
 lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4322 [inline]
 lockdep_hardirqs_on_prepare+0x139/0x410 kernel/locking/lockdep.c:4274
 trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61
 __local_bh_enable_ip+0xa4/0x130 kernel/softirq.c:401
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 batadv_nc_purge_paths+0x1cc/0x3c0 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x8fa/0xfe0 net/batman-adv/network-coding.c:720
 process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>