INFO: task syz-executor.0:5105 blocked for more than 143 seconds.
Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:20272 pid:5105 tgid:5105 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
io_schedule+0x8c/0x100 kernel/sched/core.c:8998
folio_wait_bit_common+0x881/0x12b0 mm/filemap.c:1273
folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3065
__filemap_fdatawait_range+0x17b/0x400 mm/filemap.c:522
filemap_fdatawait_keep_errors+0x31/0xd0 mm/filemap.c:617
wait_sb_inodes fs/fs-writeback.c:2639 [inline]
sync_inodes_sb+0x8b2/0xb20 fs/fs-writeback.c:2761
sync_filesystem+0x16f/0x220 fs/sync.c:64
generic_shutdown_super+0x72/0x2c0 fs/super.c:669
kill_block_super+0x44/0x90 fs/super.c:1667
deactivate_locked_super+0xc1/0x130 fs/super.c:484
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
task_work_run+0x24a/0x300 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x150 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x69/0x2a0 kernel/entry/common.c:296
do_syscall_64+0x52/0x110 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f63fea7e017
RSP: 002b:00007ffdc2b66228 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f63fea7e017
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffdc2b662e0
RBP: 00007ffdc2b662e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdc2b673a0
R13: 00007f63feac83b9 R14: 0000000000136036 R15: 000000000000001e
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:5/147:
1 lock held by klogd/4502:
#0: ffff8880b983c358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
2 locks held by getty/4810:
#0: ffff8880267d50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015d72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.0/5105:
#0: ffff88803603e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88803603e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88803603e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:516
#1: ffff88803603e910 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2578 [inline]
#1: ffff88803603e910 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x335/0xb20 fs/fs-writeback.c:2761
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #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+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 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+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 28460 Comm: kworker/u4:2 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:preempt_count_add+0x6/0x190 kernel/sched/core.c:5828
Code: ff ff 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 7c 97 48 8b 3c 24 e8 9b d5 89 00 eb 8c e9 ee fe ff ff 0f 1f 40 00 f3 0f 1e fa 41 57 <41> 56 53 89 fb 48 c7 c0 00 03 5d 92 48 c1 e8 03 49 bf 00 00 00 00
RSP: 0018:ffffc9000532f240 EFLAGS: 00000046
RAX: 1ffffffff1a69329 RBX: ffff8880b99294c0 RCX: ffffffff8195503c
RDX: 0000000000000000 RSI: ffffffff8bbde180 RDI: 0000000000000001
RBP: ffffc9000532f338 R08: ffffffff8f00c22f R09: 1ffffffff1e01845
R10: dffffc0000000000 R11: fffffbfff1e01846 R12: 0000000000000246
R13: dffffc0000000000 R14: ffffc9000532f2c0 R15: 1ffff92000a65e54
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056439d2b2680 CR3: 000000000d731000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock+0x12/0x40 kernel/locking/spinlock.c:154
krc_this_cpu_lock kernel/rcu/tree.c:2917 [inline]
add_ptr_to_bulk_krc_lock kernel/rcu/tree.c:3316 [inline]
kvfree_call_rcu+0x18a/0x790 kernel/rcu/tree.c:3401
cfg80211_update_known_bss+0x16c/0x9e0
__cfg80211_bss_update+0x153/0x20a0 net/wireless/scan.c:1827
cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2905 [inline]
cfg80211_inform_bss_frame_data+0xde1/0x17c0 net/wireless/scan.c:2936
ieee80211_bss_info_update+0x7ca/0xaa0 net/mac80211/scan.c:205
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+0x191d/0x2d30 net/mac80211/ibss.c:1604
ieee80211_iface_process_skb net/mac80211/iface.c:1589 [inline]
ieee80211_iface_work+0x805/0xd90 net/mac80211/iface.c:1643
cfg80211_wiphy_work+0x21e/0x250 net/wireless/core.c:437
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2700
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2781
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242