INFO: task kworker/u4:6:3673 blocked for more than 143 seconds.
Not tainted 5.15.118-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6 state:D
stack:20416 pid: 3673 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:3)
Call Trace:
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
rwsem_down_write_slowpath+0xebb/0x15c0 kernel/locking/rwsem.c:1157
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1293 [inline]
down_write+0x164/0x170 kernel/locking/rwsem.c:1542
f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:727
write_inode fs/fs-writeback.c:1478 [inline]
__writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1683
writeback_sb_inodes+0xbf0/0x1a50 fs/fs-writeback.c:1908
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1979
wb_writeback+0x465/0xc50 fs/fs-writeback.c:2084
wb_check_old_data_flush fs/fs-writeback.c:2184 [inline]
wb_do_writeback fs/fs-writeback.c:2237 [inline]
wb_workfn+0xc55/0x1130 fs/fs-writeback.c:2266
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307
worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91c5e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3255:
#0: ffff88814ad86098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
2 locks held by kworker/u4:4/3607:
4 locks held by kworker/u4:6/3673:
#0: ffff88801419c938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
#1: ffffc90004f1fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
#2: ffff8880aaa660e0 (&type->s_umount_key#60){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff888099875108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
3 locks held by kworker/u4:12/4398:
4 locks held by kworker/u4:15/5450:
4 locks held by syz-executor.3/15220:
1 lock held by syz-executor.2/19034:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
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+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3544 Comm: syz-fuzzer Not tainted 5.15.118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0033:0x41f64e
Code: 20 4c 89 44 24 38 e8 f1 55 ff ff 48 85 f6 0f 84 97 00 00 00 48 8b 54 24 78 49 89 f1 48 8b 74 24 48 4d 89 c8 49 29 d0 4d 8b 09 <4d> 85 c9 74 b1 4d 89 ca 49 29 d1 4c 39 ce 77 a6 4c 89 44 24 70 48
RSP: 002b:000000c0332a7e88 EFLAGS: 00000202
RAX: 000000c02e7581b0 RBX: 0000000000000030 RCX: 0000000000000020
RDX: 000000c02e7581b0 RSI: 0000000000000030 RDI: 0000000000000006
RBP: 000000c0332a7f08 R08: 0000000000000008 R09: 0000000000000000
R10: 0000000000000022 R11: 000000000000008c R12: 000000c0332a7f08
R13: 0000000000000000 R14: 000000c03cb85520 R15: 0000000000000001
FS: 000000c0346c9490 GS: 0000000000000000