INFO: task syz-executor.1:8043 blocked for more than 143 seconds.
Not tainted 5.15.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26592 pid: 8043 ppid: 5748 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
io_schedule+0x88/0x100 kernel/sched/core.c:8484
bit_wait_io+0xe/0xc0 kernel/sched/wait_bit.c:209
__wait_on_bit+0xb9/0x180 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x1d0/0x250 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
__wait_on_buffer fs/buffer.c:122 [inline]
wait_on_buffer include/linux/buffer_head.h:390 [inline]
__bread_slow fs/buffer.c:1181 [inline]
__bread_gfp+0x2d6/0x390 fs/buffer.c:1384
sb_bread include/linux/buffer_head.h:337 [inline]
isofs_fill_super+0xeb4/0x2930 fs/isofs/inode.c:673
mount_bdev+0x2c9/0x3f0 fs/super.c:1387
legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1517
do_new_mount+0x2ba/0xb40 fs/namespace.c:3005
do_mount fs/namespace.c:3348 [inline]
__do_sys_mount fs/namespace.c:3556 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f74ecb84ea9
RSP: 002b:00007f74eb0f70c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f74eccb2f80 RCX: 00007f74ecb84ea9
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00000000200000c0
RBP: 00007f74ecbd14a4 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000100c901 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f74eccb2f80 R15: 00007ffd381a4c08
</TASK>
Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
#0: ffff8880b9a3a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
#1: ffff8880b9a27848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4e1/0x810 kernel/sched/psi.c:882
1 lock held by khungtaskd/26:
#0: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by klogd/2951:
#0: ffff8880b9a3a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
2 locks held by getty/3262:
#0: ffff88814ae5e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002bab2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
1 lock held by syz-executor.1/8043:
#0: ffff88801f9400e0 (&type->s_umount_key#59/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
1 lock held by syz-executor.2/8209:
#0: ffff8880597cc0e0 (&type->s_umount_key#59/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
1 lock held by syz-executor.1/9363:
#0: ffff88801bb1e208 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x146/0xe10 drivers/block/nbd.c:1460
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.156-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.15.156-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: phy16 ieee80211_iface_work
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:218 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0xc/0x80 kernel/kcov.c:284
Code: 08 03 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 49 ff c1 4c 89 09 c3 0f 1f 00 4c 8b 04 24 65 48 8b 15 74 0f 82 7e <65> 8b 05 75 0f 82 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 5b 83
RSP: 0018:ffffc90000ce72a8 EFLAGS: 00000046
RAX: ffffffff8186dce6 RBX: 0000000000000001 RCX: ffff88813fe90000
RDX: ffff88813fe90000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000ce7350 R08: ffffffff8186dcf6 R09: fffffbfff22b9f01
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200019ce58 R14: ffffc90000ce72e0 R15: 0000000000000246
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056225135d030 CR3: 00000000236be000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000003
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
trace_hardirqs_on+0x16/0x80 kernel/trace/trace_preemptirq.c:42
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irqrestore+0x8b/0x130 kernel/locking/spinlock.c:194
debug_rcu_head_queue kernel/rcu/rcu.h:177 [inline]
kvfree_call_rcu+0xce/0x8a0 kernel/rcu/tree.c:3587
cfg80211_update_known_bss+0x16b/0x9e0
cfg80211_bss_update+0x187/0x21e0 net/wireless/scan.c:1771
cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2492 [inline]
cfg80211_inform_bss_frame_data+0xa13/0x20f0 net/wireless/scan.c:2525
ieee80211_bss_info_update+0x7a6/0xc80 net/mac80211/scan.c:190
ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline]
ieee80211_ibss_rx_queued_mgmt+0x175e/0x2af0 net/mac80211/ibss.c:1643
ieee80211_iface_process_skb net/mac80211/iface.c:1441 [inline]
ieee80211_iface_work+0x78f/0xcc0 net/mac80211/iface.c:1495
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
</TASK>