INFO: task syz-executor.3:3575 blocked for more than 143 seconds.
Not tainted 6.1.87-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:20632 pid:3575 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
wb_wait_for_completion+0x162/0x290 fs/fs-writeback.c:191
sync_inodes_sb+0x28f/0xb10 fs/fs-writeback.c:2739
sync_filesystem+0x16b/0x220 fs/sync.c:64
generic_shutdown_super+0x6b/0x340 fs/super.c:474
kill_block_super+0x7a/0xe0 fs/super.c:1459
deactivate_locked_super+0xa0/0x110 fs/super.c:332
cleanup_mnt+0x490/0x520 fs/namespace.c:1186
task_work_run+0x246/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa4a4a7f1d7
RSP: 002b:00007ffc63a82238 EFLAGS: 00000246
ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fa4a4a7f1d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc63a822f0
RBP: 00007ffc63a822f0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc63a833b0
R13: 00007fa4a4ac93b9 R14: 00000000000132d6 R15: 0000000000000006
Showing all locks held in the system:
4 locks held by kworker/u4:1/11:
#0:
ffff8880152c6938
(
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1:
ffffc90000107d20
(
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2:
ffff888020e7a650
(
sb_internal
#2
){.+.+}-{0:0}
, at: xfs_bmapi_convert_delalloc+0x263/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4521
#3: ffff888053a39858 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_bmapi_convert_delalloc+0x291/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4526
1 lock held by rcu_tasks_kthre/12:
#0:
ffffffff8d12ae50
(
rcu_tasks.tasks_gp_mutex
){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
#0:
ffffffff8d12b650
(rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
7 locks held by kworker/1:1/26:
1 lock held by khungtaskd/28:
#0:
ffffffff8d12ac80
(
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by getty/3306:
#0:
ffff88814b4dc098
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1:
ffffc900031262f0
(
&ldata->atomic_read_lock
){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188
2 locks held by syz-executor.4/3573:
#0: ffff888020e7a0e0 (&type->s_umount_key#48){+.+.}-{3:3}
, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1:
ffff888142b927d0
(
&bdi->wb_switch_rwsem
){+.+.}-{3:3}
, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
, at: sync_inodes_sb+0x270/0xb10 fs/fs-writeback.c:2737
2 locks held by syz-executor.3/3575:
#0:
ffff8880783020e0
(&type->s_umount_key#48){+.+.}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1:
ffff888142b847d0
(
&bdi->wb_switch_rwsem
){+.+.}-{3:3}
, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
, at: sync_inodes_sb+0x270/0xb10 fs/fs-writeback.c:2737
2 locks held by kworker/0:6/3608:
#0:
ffff888012472138
((wq_completion)rcu_gp
){+.+.}-{0:0}
, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1:
ffffc9000465fd20
(
(work_completion)(&rew->rew_work)
){+.+.}-{0:0}
, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
4 locks held by kworker/u4:6/3657:
#0: ffff8880152c6938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1:
ffffc90004b6fd20
(
(work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffff888078302650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x263/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4521
#3: ffff888057b4af98 (
&xfs_nondir_ilock_class
){++++}-{3:3}
, at: xfs_bmapi_convert_delalloc+0x291/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4526
3 locks held by kworker/0:13/3857:
#0:
ffff8880b983aa18
(
&rq->__lock
){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#1: ffff8880b9827788 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x43d/0x770 kernel/sched/psi.c:1000
#2:
ffff8880b9828358
(
&base->lock
){-.-.}-{2:2}
, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:999
2 locks held by dhcpcd/3924:
#0: ffff88801f056130
(
sk_lock-AF_PACKET
){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1745 [inline]
, at: packet_do_bind+0x32/0xd00 net/packet/af_packet.c:3198
#1:
ffffffff8d130278
(
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962
2 locks held by dhcpcd/3925:
#0:
ffff888017276130
(
sk_lock-AF_PACKET
){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1745 [inline]
, at: packet_do_bind+0x32/0xd00 net/packet/af_packet.c:3198
#1:
ffffffff8d130278
(rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
(rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x930 kernel/rcu/tree_exp.h:962
1 lock held by dhcpcd/3926:
#0: ffff888079c4a130
(sk_lock-AF_PACKET){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1745 [inline]
, at: packet_do_bind+0x32/0xd00 net/packet/af_packet.c:3198
1 lock held by dhcpcd/3927:
#0:
ffff88807a280130
(
sk_lock-AF_PACKET
){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1745 [inline]
, at: packet_do_bind+0x32/0xd00 net/packet/af_packet.c:3198
1 lock held by dhcpcd/3928:
#0: ffff8880727a2130 (sk_lock-AF_PACKET){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1745 [inline]
, at: packet_do_bind+0x32/0xd00 net/packet/af_packet.c:3198
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.87-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 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+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.1.87-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:____kasan_kmalloc mm/kasan/common.c:373 [inline]
RIP: 0010:__kasan_kmalloc+0x7f/0xb0 mm/kasan/common.c:383
Code: cf 07 48 ff c7 41 8b 4f 1c 48 8d 4c 0b ff 48 83 c9 07 48 f7 d8 48 83 e0 f8 48 8d 74 01 01 ba fc 00 00 00 31 c9 e8 31 28 00 00 <41> 80 bf c4 00 00 00 00 74 0e 4c 89 ff 48 89 de 44 89 f2 e8 69 1f
RSP: 0018:ffffc90000147920 EFLAGS: 00000247
RAX: ffffed10032790c0 RBX: ffff8880193c8400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000000000fc RDI: ffffed10032790c0
RBP: 0000000000000200 R08: dffffc0000000000 R09: ffffed10032790c0
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000082a20 R14: 0000000000082a20 R15: ffff888012441c80
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055800b6da600 CR3: 000000000ce8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:955 [inline]
__kmalloc_node_track_caller+0xb1/0x220 mm/slab_common.c:975
kmalloc_reserve net/core/skbuff.c:446 [inline]
__alloc_skb+0x135/0x670 net/core/skbuff.c:515
alloc_skb include/linux/skbuff.h:1271 [inline]
wg_packet_send_keepalive+0x5c/0x290 drivers/net/wireguard/send.c:226
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
run_ksoftirqd+0xc1/0x120 kernel/softirq.c:934
smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308