INFO: task kworker/u4:10:4780 blocked for more than 144 seconds.
Not tainted 5.15.98-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:10 state:D stack:23520 pid: 4780 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:4)
Call Trace:
context_switch kernel/sched/core.c:5023 [inline]
__schedule+0x132d/0x45e0 kernel/sched/core.c:6369
schedule+0x11b/0x1f0 kernel/sched/core.c:6452
rwsem_down_write_slowpath+0xf36/0x1610 kernel/locking/rwsem.c:1158
__down_write_common kernel/locking/rwsem.c:1278 [inline]
__down_write kernel/locking/rwsem.c:1287 [inline]
down_write+0x164/0x170 kernel/locking/rwsem.c:1534
f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:725
write_inode fs/fs-writeback.c:1475 [inline]
__writeback_single_inode+0x7b4/0x1180 fs/fs-writeback.c:1680
writeback_sb_inodes+0xc14/0x1af0 fs/fs-writeback.c:1905
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1976
wb_writeback+0x4b1/0xe60 fs/fs-writeback.c:2081
wb_check_old_data_flush fs/fs-writeback.c:2181 [inline]
wb_do_writeback fs/fs-writeback.c:2234 [inline]
wb_workfn+0xc27/0x10d0 fs/fs-writeback.c:2263
process_one_work+0x8e6/0x1230 kernel/workqueue.c:2306
worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 :298
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91c660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/u4:4/1104:
2 locks held by getty/3268:
#0: ffff88814ad8b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900020a32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
1 lock held by kworker/1:8/3679:
#0: ffff8880b9b39698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
4 locks held by kworker/u4:10/4780:
#0: ffff8880141fc138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x1230 kernel/workqueue.c:2279
#1: ffffc9000510fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x1230 kernel/workqueue.c:2281
#2: ffff888024a060e0 (&type->s_umount_key#59){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff888027991108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
2 locks held by syz-executor.4/8731:
3 locks held by kworker/u4:11/9434:
1 lock held by syz-executor.4/11825:
#0: ffffffff8c920ab0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x9c/0x4e0 kernel/rcu/tree.c:3994
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.98-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xec6/0xf10 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 :298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9434 Comm: kworker/u4:11 Not tainted 5.15.98-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lockdep_hardirqs_off+0x48/0x100 kernel/locking/lockdep.c:4369
Code: 8d 00 00 00 49 89 fe 65 8b 05 6c 95 e7 75 a9 00 00 f0 00 74 65 83 3d 36 e5 10 07 00 75 15 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 75 76 65 8b 05 a8 9b e7 75 85 c0 74 53 65 48
RSP: 0018:ffffc9000513fa60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff814d7eb2 RCX: ffff88807c1f9d00
RDX: 0000000000000000 RSI: ffffffff8a8aff80 RDI: ffffffff8ad8b900
RBP: ffffc9000513fb50 R08: dffffc0000000000 R09: ffffed100a0a5149
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000a27f5c R14: ffffffff814d7eb2 R15: 0000000000000201
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f58a417d058 CR3: 000000006de4e000 CR4: 00000000003526e0
DR0: 0000000000000056 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_off+0x14/0x70 kernel/trace/trace_preemptirq.c:76
__local_bh_enable_ip+0x102/0x1f0 kernel/softirq.c:365
spin_unlock_bh include/linux/spinlock.h:408 [inline]
batadv_nc_purge_paths+0x30e/0x3b0 net/batman-adv/network-coding.c:475
batadv_nc_worker+0x29a/0x580 net/batman-adv/network-coding.c:724
process_one_work+0x8e6/0x1230 kernel/workqueue.c:2306
worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 :298