INFO: task syz-executor.0:4490 blocked for more than 143 seconds.
Not tainted 5.15.184-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:21824 pid: 4490 ppid: 1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
schedule+0x11b/0x1e0 kernel/sched/core.c:6459
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
__mutex_lock_common+0xc71/0x2390 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
fuse_lock_inode+0xcd/0x120 fs/fuse/inode.c:491
fuse_lookup+0xd4/0x5a0 fs/fuse/dir.c:427
__lookup_slow+0x27d/0x3d0 fs/namei.c:1663
lookup_slow+0x53/0x70 fs/namei.c:1680
walk_component+0x319/0x460 fs/namei.c:1976
link_path_walk+0x662/0xd40 fs/namei.c:-1
path_openat+0x27d/0x2f30 fs/namei.c:3738
do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
do_sys_openat2+0x142/0x4a0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1280
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0047bea581
RSP: 002b:00007ffc5ad99690 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f0047bea581
RDX: 0000000000090800 RSI: 00007f0047c3545d RDI: 00000000ffffff9c
RBP: 00007ffc5ad9975c R08: 0000000000000000 R09: 000b8dda41a35e9a
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 0000000000015120 R14: 00000000000150c1 R15: 0000000000000006
INFO: task syz-executor.0:4574 blocked for more than 143 seconds.
Not tainted 5.15.184-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25520 pid: 4574 ppid: 4490 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
schedule+0x11b/0x1e0 kernel/sched/core.c:6459
request_wait_answer fs/fuse/dev.c:411 [inline]
__fuse_request_send fs/fuse/dev.c:430 [inline]
fuse_simple_request+0x10e7/0x19c0 fs/fuse/dev.c:515
fuse_lookup_name+0x279/0x700 fs/fuse/dir.c:383
fuse_lookup+0x13b/0x5a0 fs/fuse/dir.c:428
__lookup_slow+0x27d/0x3d0 fs/namei.c:1663
lookup_slow+0x53/0x70 fs/namei.c:1680
walk_component+0x319/0x460 fs/namei.c:1976
link_path_walk+0x662/0xd40 fs/namei.c:-1
path_openat+0x27d/0x2f30 fs/namei.c:3738
do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
do_sys_openat2+0x142/0x4a0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1280
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0047be9720
RSP: 002b:00007f0046f4ae20 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f0047be9720
RDX: 0000000000000002 RSI: 00007f0046f4af40 RDI: 00000000ffffff9c
RBP: 00007f0046f4af40 R08: 0000000000000000 R09: 00000000000004a0
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000004
R13: 00007f0046f4af3c R14: 00007f0046f4af40 R15: 00007f003eb2b000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c11c060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3943:
#0: ffff88814c6c1098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002ce32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
2 locks held by syz-executor.0/4490:
#0: ffff888070bc0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline]
#0: ffff888070bc0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x46/0x70 fs/namei.c:1679
#1: ffff888070bc05b8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xcd/0x120 fs/fuse/inode.c:491
2 locks held by syz-executor.0/4574:
#0: ffff888070bc0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline]
#0: ffff888070bc0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x46/0x70 fs/namei.c:1679
#1: ffff888070bc05b8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xcd/0x120 fs/fuse/inode.c:491
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 154 Comm: kworker/u4:2 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: phy6 ieee80211_iface_work
RIP: 0010:__preempt_count_add kernel/rcu/tree.c:1119 [inline]
RIP: 0010:rcu_is_watching+0x0/0xa0 kernel/rcu/tree.c:1122
Code: 70 75 1b 48 8d 65 e8 5b 41 5e 41 5f 5d c3 e8 07 91 3d 08 41 f7 c7 00 02 00 00 75 b8 eb b7 e8 e7 90 3d 08 0f 1f 80 00 00 00 00 <41> 57 41 56 53 65 ff 05 ec d3 9e 7e e8 df a0 3d 08 89 c3 83 f8 08
RSP: 0018:ffffc90002007968 EFLAGS: 00000202
RAX: ffffffff8927f297 RBX: ffff88807b964000 RCX: ffff88801d45d940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88807db95b08 R14: ffff88807db94c80 R15: ffff88807b964050
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff4ffbdfa8 CR3: 000000002a580000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:768 [inline]
sta_info_get+0x140/0x230 net/mac80211/sta_info.c:176
ieee80211_update_sta_info net/mac80211/ibss.c:1004 [inline]
ieee80211_rx_bss_info net/mac80211/ibss.c:1121 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline]
ieee80211_ibss_rx_queued_mgmt+0xf05/0x29c0 net/mac80211/ibss.c:1643
ieee80211_iface_process_skb net/mac80211/iface.c:1459 [inline]
ieee80211_iface_work+0x70e/0xc60 net/mac80211/iface.c:1513
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287