INFO: task syz-executor.5:10734 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:25520 pid:10734 ppid:3615   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6503
 schedule+0xda/0x1b0 kernel/sched/core.c:6579
 wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
 __writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2620
 try_to_writeback_inodes_sb+0x94/0xc0 fs/fs-writeback.c:2668
 ext4_nonda_switch+0x1aa/0x1f0 fs/ext4/inode.c:2950
 ext4_da_write_begin+0x16c/0xb50 fs/ext4/inode.c:2977
 generic_perform_write+0x252/0x570 mm/filemap.c:3753
 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:285
 ext4_file_write_iter+0x8b8/0x16e0 fs/ext4/file.c:700
 __kernel_write_iter+0x25e/0x730 fs/read_write.c:517
 dump_emit_page fs/coredump.c:857 [inline]
 dump_user_range+0x230/0x700 fs/coredump.c:908
 elf_core_dump+0x26de/0x3510 fs/binfmt_elf.c:2311
 do_coredump+0x26c5/0x3bc0 fs/coredump.c:755
 get_signal+0x1be1/0x2430 kernel/signal.c:2844
 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:309
 exc_page_fault+0xbc/0x170 arch/x86/mm/fault.c:1578
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x2e
RSP: 002b:00000000200002b8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0a7ebabf80 RCX: 00007f0a7ea8b5a9
RDX: 0000000000000000 RSI: 00000000200002b0 RDI: 0000000048000000
RBP: 00007f0a7eae67b0 R08: 0000000020000340 R09: 0000000020000340
R10: 0000000020000300 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fff678a6a5f R14: 00007f0a7f7e4300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
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:220 [inline]
 watchdog+0xc71/0xfc0 kernel/hung_task.c:377
 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: 21060 Comm: kworker/u4:7 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lock_release+0x45f/0x810 kernel/locking/lockdep.c:5692
Code: 00 00 48 8b 84 24 88 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 fc 02 00 00 48 81 c4 90 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f <c3> 65 44 8b 35 c0 64 a2 7e 48 c7 c3 00 1c e2 8d 48 b8 00 00 00 00
RSP: 0018:ffffc90004d7fc80 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff815fb185
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8de21a10
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8de21a17
R10: 0000000000000000 R11: 0000000000000005 R12: 0000000000000002
R13: 0000000000000000 R14: dffffc0000000000 R15: 000000000000017f
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe707ffdc8 CR3: 000000000bc8e000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 rcu_lock_release include/linux/rcupdate.h:309 [inline]
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x86b/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>