INFO: task syz.1.6274:546 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.6274 state:D stack:26568 pid:546 tgid:546 ppid:5806 task_flags:0x400040 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5290 [inline]
__schedule+0x1023/0x6000 kernel/sched/core.c:6902
__schedule_loop kernel/sched/core.c:6984 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:6999
request_wait_answer+0x55e/0x7d0 fs/fuse/dev.c:585
__fuse_request_send fs/fuse/dev.c:599 [inline]
__fuse_simple_request+0x45b/0xe70 fs/fuse/dev.c:693
fuse_simple_request fs/fuse/fuse_i.h:1263 [inline]
fuse_flush+0x4e4/0x6b0 fs/fuse/file.c:494
filp_flush+0xe7/0x190 fs/open.c:1469
filp_close+0x1c/0x30 fs/open.c:1482
__range_close fs/file.c:790 [inline]
__do_sys_close_range+0x427/0x740 fs/file.c:849
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf23d9bf79
RSP: 002b:00007ffc13821fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffc138220d0 RCX: 00007faf23d9bf79
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000026efb8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2e420000 R11: 0000000000000246 R12: 00007ffc13822110
R13: 00007faf24015fac R14: 000000000026f07b R15: 00007faf24015fa0
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e5e6ce0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e5e6ce0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e5e6ce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
2 locks held by getty/5566:
#0: ffff88814e62e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x1500 drivers/tty/n_tty.c:2211
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xcc3/0xfe0 kernel/hung_task.c:515
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11597 Comm: kworker/u8:16 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:__is_kernel_text include/asm-generic/sections.h:213 [inline]
RIP: 0010:is_kernel_text include/linux/kallsyms.h:29 [inline]
RIP: 0010:core_kernel_text kernel/extable.c:68 [inline]
RIP: 0010:kernel_text_address+0x15/0x100 kernel/extable.c:99
Code: 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 53 48 89 fb 48 83 ec 08 48 81 ff 00 00 00 81 72 18 <48> 81 ff c8 fa 7e 8b 73 0f 48 83 c4 08 b8 01 00 00 00 5b e9 83 01
RSP: 0018:ffffc90004056d10 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: ffffffff8af0a2f9 RCX: ffffc90004056ca4
RDX: 1ffff9200080adb3 RSI: ffffffff8dc2c3f8 RDI: ffffffff8af0a2f9
RBP: ffffc90004056d98 R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 000000000009ed7e R12: ffffffff81f1d080
R13: ffffc90004056e10 R14: 0000000000000000 R15: ffff88802a00c900
FS: 0000000000000000(0000) GS:ffff8881246b6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a53cd06110 CR3: 000000000e396000 CR4: 00000000003526f0
Call Trace:
__kernel_text_address+0xd/0x30 kernel/extable.c:79
unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:385
arch_stack_walk+0xa6/0xf0 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2540 [inline]
slab_free mm/slub.c:6674 [inline]
kfree+0x1c7/0x690 mm/slub.c:6886
ieee80211_inform_bss+0x8d5/0x1150 net/mac80211/scan.c:164
rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
cfg80211_inform_single_bss_data+0x898/0x1d40 net/wireless/scan.c:2373
cfg80211_inform_bss_data+0x230/0x39f0 net/wireless/scan.c:3228
cfg80211_inform_bss_frame_data+0x247/0x730 net/wireless/scan.c:3319
ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:230
ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1575 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1919/0x2f30 net/mac80211/ibss.c:1602
ieee80211_iface_process_skb net/mac80211/iface.c:1740 [inline]
ieee80211_iface_work+0xbf1/0x1350 net/mac80211/iface.c:1794
cfg80211_wiphy_work+0x3f7/0x560 net/wireless/core.c:438
process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246