INFO: task syz-executor.1:25415 blocked for more than 143 seconds.
Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:21440 pid:25415 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
sync_inodes_sb+0x297/0xab0 fs/fs-writeback.c:2730
sync_filesystem+0x16f/0x220 fs/sync.c:64
generic_shutdown_super+0x6f/0x340 fs/super.c:473
kill_block_super+0x84/0xf0 fs/super.c:1407
deactivate_locked_super+0xa4/0x110 fs/super.c:331
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
task_work_run+0x24a/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
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+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc607c8d5d7
RSP: 002b:00007ffcdba485a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc607c8d5d7
RDX: 00007ffcdba4867b RSI: 000000000000000a RDI: 00007ffcdba48670
RBP: 00007ffcdba48670 R08: 00000000ffffffff R09: 00007ffcdba48440
R10: 0000555556319893 R11: 0000000000000246 R12: 00007fc607ce6cdc
R13: 00007ffcdba49730 R14: 0000555556319810 R15: 00007ffcdba49770
Showing all locks held in the system:
2 locks held by kworker/u4:0/10:
#0: ffff8880124d5138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378
#1: ffffc900000f7d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cf276f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cf27ab0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8cf27520 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4750:
#0: ffff8880288ad098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
3 locks held by kworker/u4:7/5300:
2 locks held by kworker/u4:9/9852:
2 locks held by syz-executor.1/25415:
#0: ffff888079fe60e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
#1: ffff888140fde7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff888140fde7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x278/0xab0 fs/fs-writeback.c:2728
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1099 Comm: kworker/u4:5 Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: phy8 ieee80211_iface_work
RIP: 0010:ieee80211_sta_get_rates+0x3ea/0x720 net/mac80211/util.c:2315
Code: 29 01 00 00 e8 47 d6 53 f7 4d 89 e5 03 5c 24 44 89 d8 99 f7 7c 24 78 89 c3 89 c7 8b 6c 24 48 89 ee e8 aa d7 53 f7 39 eb 75 62 40 00 00 00 44 89 f6 e8 c9 d9 53 f7 41 83 fe 3f 0f 87 29 01 00
RSP: 0018:ffffc900056bf840 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000000000b4 RCX: ffff8880215bbb80
RDX: ffff8880215bbb80 RSI: 00000000000000b4 RDI: 00000000000000b4
RBP: 00000000000000b4 R08: ffffffff8a37a906 R09: fffffbfff1cab9ae
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888022a4b410
R13: ffff888022a4b410 R14: 0000000000000007 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d55db95600 CR3: 000000000cd30000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_update_sta_info net/mac80211/ibss.c:1003 [inline]
ieee80211_rx_bss_info net/mac80211/ibss.c:1118 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1133/0x2cf0 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline]
ieee80211_iface_work+0x7bd/0xd00 net/mac80211/iface.c:1648
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308