INFO: task kworker/u4:3:46 blocked for more than 143 seconds.
Not tainted 5.19.0-rc8-syzkaller-00155-g6a010258447d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:3 state:D stack:24336 pid: 46 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn
(flush-7:2)
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6458
schedule+0xeb/0x1b0 kernel/sched/core.c:6530
schedule_timeout+0xac/0x300 kernel/time/timer.c:1911
do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
f2fs_issue_checkpoint+0x2f9/0x4e0
f2fs_balance_fs_bg+0x4b7/0x930 fs/f2fs/segment.c:477
f2fs_write_node_pages+0x147/0x6d0 fs/f2fs/node.c:2104
do_writepages+0x3c3/0x690 mm/page-writeback.c:2443
__writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587
writeback_sb_inodes+0xb45/0x18c0 fs/fs-writeback.c:1865
__writeback_inodes_wb+0x125/0x420 fs/fs-writeback.c:1936
wb_writeback+0x450/0x7a0 fs/fs-writeback.c:2041
wb_check_old_data_flush fs/fs-writeback.c:2141 [inline]
wb_do_writeback fs/fs-writeback.c:2194 [inline]
wb_workfn+0xa92/0xf10 fs/fs-writeback.c:2222
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8cb1ef20 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/u4:3/46:
#0:
ffff88801749c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1: ffffc90000b77d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
#2: ffff888075cae0e0 (&type->s_umount_key#54){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:415
2 locks held by getty/3283:
#0: ffff8880270e2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2124
3 locks held by syz-executor.0/3642:
#0: ffff88814acc2460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1:
ffff88814acc2650
(
sb_internal
){.+.+}-{0:0}
, at: __sb_start_write include/linux/fs.h:1699 [inline]
, at: sb_start_intwrite include/linux/fs.h:1821 [inline]
, at: ext4_evict_inode+0x455/0xf90 fs/ext4/inode.c:238
#2: ffff8880b9b39b58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:544
2 locks held by syz-executor.4/3645:
#0:
ffff88814acc2460
(
sb_writers
#4
){.+.+}-{0:0}
, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1:
ffff88814acc2650
(
sb_internal
){.+.+}-{0:0}
, at: __sb_start_write include/linux/fs.h:1699 [inline]
, at: sb_start_intwrite include/linux/fs.h:1821 [inline]
, at: ext4_evict_inode+0x455/0xf90 fs/ext4/inode.c:238
2 locks held by syz-executor.5/3713:
#0:
ffff88814acc2460
(
sb_writers
#4
){.+.+}-{0:0}
, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1:
ffff888040a58400
(
&type->i_mutex_dir_key
#3
/1
){+.+.}-{3:3}
, at: inode_lock_nested include/linux/fs.h:776 [inline]
, at: do_unlinkat+0x27d/0x9a0 fs/namei.c:4243
2 locks held by kworker/1:8/4323:
#0:
ffff888011c66538
(
(wq_completion)rcu_gp
){+.+.}-{0:0}
, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1:
ffffc90002d2fd00
(
(work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
4 locks held by kworker/u4:15/7221:
5 locks held by f2fs_ckpt-7:2/22606:
2 locks held by syz-executor.3/24794:
#0:
ffff8881457380e0
(
&type->s_umount_key
#75
/1
){+.+.}-{3:3}
, at: alloc_super+0x1c5/0x820 fs/super.c:228
#1:
ffffffff8cb24220
(
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
, at: synchronize_rcu_expedited+0x266/0x720 kernel/rcu/tree_exp.h:927
2 locks held by dhcpcd/24806:
#0:
ffff8880762ea130
(
sk_lock-AF_PACKET
){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1677 [inline]
, at: packet_do_bind+0x2a/0xce0 net/packet/af_packet.c:3194
#1:
ffffffff8cb24220
(
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
, at: synchronize_rcu_expedited+0x329/0x720 kernel/rcu/tree_exp.h:927
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc8-syzkaller-00155-g6a010258447d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xcf9/0xd40 kernel/hung_task.c:369
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 5.19.0-rc8-syzkaller-00155-g6a010258447d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:__raw_callee_save___pv_queued_spin_unlock+0xc/0x12
Code: 56 57 41 50 41 51 41 52 41 53 e8 1f 0e 00 00 41 5b 41 5a 41 59 41 58 5f 5e 5a 59 c3 66 90 52 b8 01 00 00 00 31 d2 f0 0f b0 17 <3c> 01 75 02 5a c3 56 0f b6 f0 e8 c5 ff ff ff 5e 5a c3 66 90 55 48
RSP: 0018:ffffc90000137b68 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffffffff1a837f9 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8d41bfc0
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff1a837f9
R10: fffffbfff1a837f9 R11: 1ffffffff1a837f8 R12: 1ffffffff1a837fa
R13: ffffffff8d41bfd0 R14: ffffffff8d41bfc8 R15: ffffffff8d41bfc0
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc5fd84b88 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:596 [inline]
queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline]
do_raw_spin_unlock+0x134/0x8a0 kernel/locking/spinlock_debug.c:141
__raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_unlock+0x1a/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:389 [inline]
wg_ratelimiter_gc_entries+0x3e1/0x4a0 drivers/net/wireguard/ratelimiter.c:76
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30