INFO: task syz-executor.3:5098 blocked for more than 143 seconds.
Not tainted 6.8.0-rc6-syzkaller-00024-ge326df53af00 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:20368 pid:5098 tgid:5098 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
btrfs_qgroup_wait_for_completion+0x92/0xc0 fs/btrfs/qgroup.c:3849
close_ctree+0x118/0xd40 fs/btrfs/disk-io.c:4254
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_anon_super+0x3b/0x70 fs/super.c:1225
btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2093
deactivate_locked_super+0xc4/0x130 fs/super.c:472
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
task_work_run+0x24e/0x310 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x167/0x360 kernel/entry/common.c:212
do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fb782c7f0d7
RSP: 002b:00007fffd705f848 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fb782c7f0d7
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fffd705f900
RBP: 00007fffd705f900 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffd70609c0
R13: 00007fb782cc93b9 R14: 000000000002dd60 R15: 0000000000000005
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4820:
#0: ffff88802a3870a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.3/5098:
#0: ffff88806a69a0e0 (&type->s_umount_key#54){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806a69a0e0 (&type->s_umount_key#54){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806a69a0e0 (&type->s_umount_key#54){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:504
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller-00024-ge326df53af00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1100 Comm: kworker/u4:7 Not tainted 6.8.0-rc6-syzkaller-00024-ge326df53af00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:unwind_next_frame+0x695/0x29e0 arch/x86/kernel/unwind_orc.c:505
Code: 3c 5b 4d 01 ff 49 01 cf 0f 84 82 00 00 00 49 89 ee e8 7f 18 53 00 49 8d 6f 04 49 8d 5f 05 48 89 e8 48 c1 e8 03 42 0f b6 04 28 <84> c0 0f 85 65 1b 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900043c6d48 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff90088ad9 RCX: ffff888021dd3b80
RDX: 0000000000000000 RSI: ffffffff817af8cb RDI: ffffffff817af7d8
RBP: ffffffff90088ad8 R08: ffffffff81405265 R09: ffffc900043c6f10
R10: 0000000000000003 R11: ffffffff818043c0 R12: ffffffff8f9678c4
R13: dffffc0000000000 R14: 1ffff92000878dc4 R15: ffffffff90088ad4
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0d8f92910 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x150/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x117/0x1d0 kernel/stacktrace.c:122
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:551
kvfree_call_rcu+0xfc/0x790 kernel/rcu/tree.c:3434
cfg80211_update_known_bss+0xb39/0x1500 net/wireless/scan.c:1848
__cfg80211_bss_update+0x150/0x20c0 net/wireless/scan.c:1894
cfg80211_inform_single_bss_frame_data net/wireless/scan.c:3090 [inline]
cfg80211_inform_bss_frame_data+0x116a/0x1d60 net/wireless/scan.c:3125
ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1098 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1577 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1924/0x2cd0 net/mac80211/ibss.c:1604
ieee80211_iface_process_skb net/mac80211/iface.c:1589 [inline]
ieee80211_iface_work+0x809/0xd90 net/mac80211/iface.c:1643
cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:437
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243