INFO: task kworker/u4:0:9 blocked for more than 143 seconds.
Not tainted 5.15.103-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0 state:D stack:19320 pid: 9 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:5)
Call Trace:
context_switch kernel/sched/core.c:5023 [inline]
__schedule+0x1348/0x4610 kernel/sched/core.c:6369
schedule+0x11b/0x1f0 kernel/sched/core.c:6452
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:1475 [inline]
__writeback_single_inode+0x808/0x1210 fs/fs-writeback.c:1680
writeback_sb_inodes+0xbd8/0x1ac0 fs/fs-writeback.c:1905
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1976
wb_writeback+0x4cc/0xeb0 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+0xc42/0x10e0 fs/fs-writeback.c:2263
process_one_work+0x90d/0x1270 kernel/workqueue.c:2306
worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
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:
4 locks held by kworker/u4:0/9:
#0: ffff888013ffc138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x794/0x1270 kernel/workqueue.c:2279
#1: ffffc90000ce7d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7da/0x1270 kernel/workqueue.c:2281
#2: ffff8880854320e0 (&type->s_umount_key#52){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff888019d69108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
1 lock held by khungtaskd/27:
#0: ffffffff8c91c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/u4:5/1457:
2 locks held by getty/3270:
#0: ffff888025016098 (&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 syz-executor.0/3625:
#0: ffff8880862940e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:365
#1: ffffffff8c920868 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#1: ffffffff8c920868 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:840
2 locks held by kworker/1:9/8349:
#0: ffff888011c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x794/0x1270 kernel/workqueue.c:2279
#1: ffffc9000a73fd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7da/0x1270 kernel/workqueue.c:2281
3 locks held by syz-executor.5/11737:
3 locks held by syz-executor.3/14884:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.103-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+0xf54/0xfa0 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: 14884 Comm: syz-executor.3 Not tainted 5.15.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:hlock_class kernel/locking/lockdep.c:197 [inline]
RIP: 0010:mark_lock+0xa0/0x340 kernel/locking/lockdep.c:4568
Code: 02 00 00 8b 1b 81 e3 ff 1f 00 00 89 d8 c1 e8 06 48 8d 3c c5 a0 30 bb 8f be 08 00 00 00 e8 98 d1 66 00 48 0f a3 1d 60 fe 57 0e <73> 11 48 8d 04 5b 48 c1 e0 06 48 8d 98 a0 8f 8a 8f eb 23 48 c7 c0
RSP: 0018:ffffc90005626f18 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 00000000000004f0 RCX: ffffffff81633238
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fbb3138
RBP: 0000000000000006 R08: dffffc0000000000 R09: fffffbfff1f76628
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807d562768
R13: dffffc0000000000 R14: 0000000000000040 R15: ffff88807d562748
FS: 00007fdb2c9f4700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000204b3000 CR3: 0000000074c30000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_held_locks kernel/locking/lockdep.c:4192 [inline]
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4218 [inline]
lockdep_hardirqs_on_prepare+0x3a0/0x7a0 kernel/locking/lockdep.c:4277
trace_hardirqs_on+0x67/0x80 kernel/trace/trace_preemptirq.c:49
consume_stock mm/memcontrol.c:2209 [inline]
try_charge_memcg+0x2aa/0x1530 mm/memcontrol.c:2604
try_charge mm/memcontrol.c:2776 [inline]
charge_memcg+0x10b/0x340 mm/memcontrol.c:6741
__mem_cgroup_charge+0x23/0x80 mm/memcontrol.c:6777
mem_cgroup_charge include/linux/memcontrol.h:695 [inline]
__add_to_page_cache_locked+0xc09/0x1260 mm/filemap.c:892
add_to_page_cache_lru+0x1b3/0x560 mm/filemap.c:984
pagecache_get_page+0xbe0/0x1010 mm/filemap.c:1951
grab_cache_page_write_begin+0x57/0x90 mm/filemap.c:3730
ext4_da_write_begin+0x61e/0xc50 fs/ext4/inode.c:2990
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
ext4_buffered_write_iter+0x22e/0x380 fs/ext4/file.c:269
ext4_file_write_iter+0x87c/0x1990
do_iter_readv_writev+0x594/0x7a0
do_iter_write+0x1ea/0x760 fs/read_write.c:855
vfs_writev fs/read_write.c:928 [inline]
do_pwritev+0x219/0x360 fs/read_write.c:1025
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fdb2e4820f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdb2c9f4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007fdb2e5a1f80 RCX: 00007fdb2e4820f9
RDX: 0000000000000273 RSI: 00000000200003c0 RDI: 0000000000000003
RBP: 00007fdb2e4ddb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe756ed89f R14: 00007fdb2c9f4300 R15: 0000000000022000