INFO: task syz-executor.4:13350 blocked for more than 143 seconds.
Not tainted 6.1.71-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:21632 pid:13350 ppid:3591 flags:0x00004002
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
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa73/0x26a0 kernel/exit.c:869
do_group_exit+0x202/0x2b0 kernel/exit.c:1019
get_signal+0x16f7/0x17d0 kernel/signal.c:2862
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fba98c7cd29
RSP: 002b:00007fba999b60c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
RAX: ffffffffffffff8b RBX: 00007fba98dabf80 RCX: 00007fba98c7cd29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007fba98cc947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fba98dabf80 R15: 00007ffce528eca8
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0:
ffffffff8d12a4f0
(
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:
ffffffff8d12acf0
(
rcu_tasks_trace.tasks_gp_mutex
){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8d12a320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
#0: ffffffff8d12a320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d12a320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by getty/3303:
#0:
ffff88814b292098 (&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
5 locks held by kworker/1:8/3676:
2 locks held by kworker/1:11/5204:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc90003b2fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
3 locks held by kworker/u4:13/6885:
4 locks held by kworker/u4:14/6892:
#0: ffff888142ebe938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc9000ac0fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffff88808842c650 (sb_internal#3){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x263/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4521
#3: ffff88808e5446d8 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_bmapi_convert_delalloc+0x291/0x12d0 fs/xfs/libxfs/xfs_bmap.c:4526
5 locks held by kworker/1:13/7259:
2 locks held by syz-executor.4/13350:
#0: ffff88808842c0e0 (&type->s_umount_key#67){++++}-{3:3}
, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1:
ffff88802010e7d0
(&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
(&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x270/0xb10 fs/fs-writeback.c:2737
2 locks held by syz-executor.5/16514:
#0: ffffffff8e295228 (rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7c1/0xff0 net/core/rtnetlink.c:6119
#1:
ffffffff8d12f8f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
ffffffff8d12f8f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3b0/0x8a0 kernel/rcu/tree_exp.h:950
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.71-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7072 Comm: kworker/0:9 Not tainted 6.1.71-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: xfs-buf/loop4 xfs_buf_ioend_work
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:235 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0x4/0x80 kernel/kcov.c:284
Code: 89 f8 89 f6 49 ff c2 4c 89 11 48 c7 44 0a 08 04 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 c3 0f 1f 00 4c 8b 04 24 <65> 48 8b 0d 54 d8 77 7e 65 8b 05 55 d8 77 7e a9 00 01 ff 00 74 10
RSP: 0018:ffffc90000007bb0 EFLAGS: 00000283
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff8880243a0000
RDX: ffff8880243a0000 RSI: 00000000061a8000 RDI: 00000000001cb1d9
RBP: 000000fae71d116e R08: ffffffff81799435 R09: fffffbfff209206c
R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000061a8000
R13: ffff888089e5f1d8 R14: 00000000001cb1d9 R15: 1ffff110113cbe37
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04c8cd35c0 CR3: 0000000017f25000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hrtimer_forward+0xc5/0x2c0 kernel/time/hrtimer.c:1053
hrtimer_forward_now include/linux/hrtimer.h:506 [inline]
mac80211_hwsim_beacon+0x188/0x1e0 drivers/net/wireless/mac80211_hwsim.c:2151
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x196/0x2c0 kernel/time/hrtimer.c:1766
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1919 [inline]
RIP: 0010:vprintk_emit+0x501/0x740 kernel/printk/printk.c:2267
Code: 21 e3 0f 85 a6 01 00 00 e8 6c b1 1c 00 44 8b 24 24 4d 85 ff 75 07 e8 5e b1 1c 00 eb 06 e8 57 b1 1c 00 fb 48 c7 c7 e0 64 00 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 41 56 e8 f6
RSP: 0018:ffffc9000c7ef760 EFLAGS: 00000293
RAX: ffffffff816de3a9 RBX: 0000000000000000 RCX: ffff8880243a0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8d0064e0
RBP: ffffc9000c7ef850 R08: ffffffff816de386 R09: fffffbfff209206c
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000004b
R13: dffffc0000000000 R14: ffffffff816de1f0 R15: 0000000000000200
_printk+0xd1/0x111 kernel/printk/printk.c:2293
print_hex_dump+0x1a2/0x250 lib/hexdump.c:285
xfs_hex_dump+0x39/0x50 fs/xfs/xfs_message.c:110
xfs_buf_verifier_error+0x1ca/0x2a0 fs/xfs/xfs_error.c:428
xfs_agf_read_verify+0x1f8/0x2a0 fs/xfs/libxfs/xfs_alloc.c:3008
xfs_buf_ioend+0x28f/0x780 fs/xfs/xfs_buf.c:1303
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306