INFO: task syz-executor:4250 blocked for more than 144 seconds.
Not tainted 6.1.114-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21024 pid:4250 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 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:1470
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:203
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: 0033:0x7f70b817fa47
RSP: 002b:00007ffe5dac0178 EFLAGS: 00000246
ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f70b81f11cc RCX: 00007f70b817fa47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe5dac0230
RBP: 00007ffe5dac0230 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe5dac12b0
R13: 00007f70b81f11cc R14: 000000000001a998 R15: 00007ffe5dac12f0
Showing all locks held in the system:
2 locks held by kworker/u4:1/11:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32b1d0 (
rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32b9d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/27:
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6510
2 locks held by getty/4003:
#0: ffff88814d58a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1:
ffffc900032462f0
(
&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2198
2 locks held by syz-executor/4247:
#0: ffff888028ad20e0 (&type->s_umount_key#58){+.+.}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1: ffff88802521e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
#1: ffff88802521e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x270/0xb10 fs/fs-writeback.c:2737
2 locks held by syz-executor/4248:
#0: ffff88805346c0e0 (&type->s_umount_key#58){+.+.}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1:
ffff88802520a7d0
(
&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/4250:
#0: ffff888030b0e0e0 (&type->s_umount_key#58
){+.+.}-{3:3}
, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1:
ffff8880251447d0
(
&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
4 locks held by kworker/u4:6/4302:
8 locks held by kworker/u4:7/4342:
4 locks held by kworker/u4:9/4502:
5 locks held by kworker/u4:13/4701:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.1.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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+0x1ae/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:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4342 Comm: kworker/u4:7 Not tainted 6.1.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:stack_trace_consume_entry+0xa/0x270 kernel/stacktrace.c:83
Code: 38 c1 0f 8c 7b ff ff ff 48 89 df e8 40 c5 69 00 e9 6e ff ff ff e8 56 73 2e 09 66 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 <48> 83 ec 18 48 89 fb 48 ba 00 00 00 00 00 fc ff df 4c 8d 4f 10 4d
RSP: 0018:ffffc900001e05e8 EFLAGS: 00000282
RAX: ffffffff81e1ebb6 RBX: ffffc900001e0620 RCX: ffffffff8fdb5000
RDX: ffffffff8ff0f001 RSI: ffffffff81e1ebb6 RDI: ffffc900001e0700
RBP: ffffc900001e06b0 R08: dffffc0000000000 R09: ffffc900001e0670
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807b415940
R13: ffffffff81784fd0 R14: ffffc900001e0700 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f448f908ab8 CR3: 000000007a3cc000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x101/0x140 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674
skb_free_head net/core/skbuff.c:762 [inline]
skb_release_data+0x5de/0x7a0 net/core/skbuff.c:791
skb_release_all net/core/skbuff.c:856 [inline]
__kfree_skb net/core/skbuff.c:870 [inline]
consume_skb+0xa3/0x140 net/core/skbuff.c:1035
mac80211_hwsim_beacon_tx+0x5f8/0xaa0 drivers/net/wireless/mac80211_hwsim.c:2116
__iterate_interfaces+0x21e/0x4b0 net/mac80211/util.c:790
ieee80211_iterate_active_interfaces_atomic+0xd4/0x170 net/mac80211/util.c:826
mac80211_hwsim_beacon+0xd0/0x1e0 drivers/net/wireless/mac80211_hwsim.c:2142
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1753
hrtimer_run_softirq+0x196/0x2c0 kernel/time/hrtimer.c:1770
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
__do_softirq kernel/softirq.c:605 [inline]
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1948 [inline]
RIP: 0010:vprintk_emit+0x4fa/0x740 kernel/printk/printk.c:2302
Code: 21 e3 0f 85 ad 01 00 00 e8 13 64 1c 00 44 8b 24 24 4d 85 ff 75 07 e8 05 64 1c 00 eb 06 e8 fe 63 1c 00 fb 48 c7 c7 20 72 20 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 41 56 e8 ed
RSP: 0018:ffffc90004f362e0 EFLAGS: 00000293
RAX: ffffffff816e2f62 RBX: 0000000000000000 RCX: ffff88807b415940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8d207220
RBP: ffffc90004f363d0 R08: ffffffff816e2f3f R09: fffffbfff2246072
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000087
R13: dffffc0000000000 R14: ffffffff816e2db0 R15: 0000000000000200
_printk+0xd1/0x111 kernel/printk/printk.c:2328
_udf_err+0x137/0x180 fs/udf/super.c:2353
udf_bitmap_new_block fs/udf/balloc.c:357 [inline]
udf_new_block+0x1bb4/0x2130 fs/udf/balloc.c:730
inode_getblk fs/udf/inode.c:769 [inline]
udf_get_block+0x1a69/0x5360 fs/udf/inode.c:359
__block_write_full_page+0x33a/0x1680 fs/buffer.c:1745
__mpage_writepage+0x1495/0x1930 fs/mpage.c:629
write_cache_pages+0x92e/0x15c0 mm/page-writeback.c:2382
mpage_writepages+0x103/0x1d0 fs/mpage.c:664
do_writepages+0x3a2/0x670 mm/page-writeback.c:2491
__writeback_single_inode+0x15d/0x11e0 fs/fs-writeback.c:1612
writeback_sb_inodes+0xc2b/0x1b20 fs/fs-writeback.c:1903
wb_writeback+0x49d/0xe10 fs/fs-writeback.c:2077
wb_do_writeback fs/fs-writeback.c:2220 [inline]
wb_workfn+0x427/0x1020 fs/fs-writeback.c:2260
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:295