INFO: task syz.2.885:9235 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.2.885 state:D stack:24168 pid:9235 tgid:9234 ppid:5824 task_flags:0x480040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_timeout+0x1b2/0x280 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:100 [inline]
__wait_for_common+0x2e7/0x4c0 kernel/sched/completion.c:121
i2c_del_adapter+0x62d/0x820 drivers/i2c/i2c-core-base.c:1814
dvb_usb_i2c_exit+0x9f/0xf0 drivers/media/usb/dvb-usb/dvb-usb-i2c.c:46
dvb_usb_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:144 [inline]
dvb_usb_device_exit+0x313/0x520 drivers/media/usb/dvb-usb/dvb-usb-init.c:338
usb_unbind_interface+0x1dd/0x9e0 drivers/usb/core/driver.c:458
device_remove drivers/base/dd.c:621 [inline]
device_remove+0x12a/0x180 drivers/base/dd.c:613
__device_release_driver drivers/base/dd.c:1352 [inline]
device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1375
bus_remove_device+0x2bc/0x560 drivers/base/bus.c:657
device_del+0x376/0x9b0 drivers/base/core.c:3895
usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1478
usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2345
hub_quiesce+0x16d/0x320 drivers/usb/core/hub.c:1405
hub_disconnect+0xd5/0x510 drivers/usb/core/hub.c:1811
usb_unbind_interface+0x1dd/0x9e0 drivers/usb/core/driver.c:458
device_remove drivers/base/dd.c:621 [inline]
device_remove+0x12a/0x180 drivers/base/dd.c:613
__device_release_driver drivers/base/dd.c:1352 [inline]
device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1375
usb_driver_release_interface+0x10e/0x190 drivers/usb/core/driver.c:640
proc_disconnect_claim+0x21b/0x390 drivers/usb/core/devio.c:2491
usbdev_do_ioctl drivers/usb/core/devio.c:2782 [inline]
usbdev_ioctl+0xbf5/0x3aa0 drivers/usb/core/devio.c:2826
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d6c59cdd9
RSP: 002b:00007f2d6d455028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2d6c815fa0 RCX: 00007f2d6c59cdd9
RDX: 00002000000001c0 RSI: 000000008108551b RDI: 0000000000000004
RBP: 00007f2d6c632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2d6c816038 R14: 00007f2d6c815fa0 R15: 00007ffdab193448
Showing all locks held in the system:
3 locks held by rcu_exp_gp_kthr/18:
#0: ffff8880b853b2a0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:652
#1: ffff8880b8524648 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:225 [inline]
#1: ffff8880b8524648 (psi_seq){-.-.}-{0:0}, at: __schedule+0x2d69/0x6820 kernel/sched/core.c:7182
#2: ffffffff9b241e88 (&____s->seqcount#2){----}-{0:0}, at: clockevents_program_event+0x23e/0x820 kernel/time/clockevents.c:363
1 lock held by khungtaskd/30:
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:5/79:
#0: ffff88801f376940 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x12d6/0x1980 kernel/workqueue.c:3277
#1: ffffc900015f7d08 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x973/0x1980 kernel/workqueue.c:3278
5 locks held by kworker/u8:6/214:
2 locks held by getty/5589:
#0: ffff88803a73f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x14f0 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5826:
#0: ffffffff8e7f0fa8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x27f/0x3c0 kernel/rcu/tree_exp.h:311
4 locks held by syz.2.885/9235:
#0: ffff88802c1c71d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline]
#0: ffff88802c1c71d8 (&dev->mutex){....}-{4:4}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2610 [inline]
#0: ffff88802c1c71d8 (&dev->mutex){....}-{4:4}, at: usbdev_ioctl+0x1a7/0x3aa0 drivers/usb/core/devio.c:2826
#1: ffff88802c1c51a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline]
#1: ffff88802c1c51a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1174 [inline]
#1: ffff88802c1c51a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb2/0x620 drivers/base/dd.c:1372
#2: ffff8880266bd1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline]
#2: ffff8880266bd1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x10a/0x9a0 drivers/usb/core/hub.c:2336
#3: ffff8880576c81a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline]
#3: ffff8880576c81a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1174 [inline]
#3: ffff8880576c81a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb2/0x620 drivers/base/dd.c:1372
1 lock held by syz.5.1428/11140:
#0: ffffffff8e7f0fa8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x19e/0x3c0 kernel/rcu/tree_exp.h:343
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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:162 [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:353 [inline]
watchdog+0xcb1/0x1030 kernel/hung_task.c:561
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:kasan_save_stack+0x25/0x50 mm/kasan/common.c:54
Code: 90 90 90 90 90 0f 1f 40 d6 41 54 31 c0 b9 40 00 00 00 41 89 f4 55 89 fd 31 d2 be 40 00 00 00 53 48 81 ec 00 02 00 00 48 89 e7 48 ab 48 89 e7 e8 a0 c0 7c ff 44 89 e1 89 ea 89 c6 48 89 e7 e8
RSP: 0018:ffffc90000be6f98 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888039bc9d60 RCX: 0000000000000013
RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffffc90000be7100
RBP: 0000000000000920 R08: 0000000000000001 R09: 0000000000000000
R10: ffff888039bc9d60 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000048 R14: ffff888039bc9d00 R15: ffffffff8aea1cb7
FS: 0000000000000000(0000) GS:ffff8881242da000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14f65ea2f8 CR3: 0000000035b4a000 CR4: 00000000003526f0
Call Trace:
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5295 [inline]
__kmalloc_noprof+0x301/0x850 mm/slub.c:5307
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
cfg80211_inform_single_bss_data+0x557/0x1de0 net/wireless/scan.c:2344
cfg80211_inform_bss_data+0x237/0x3a00 net/wireless/scan.c:3226
cfg80211_inform_bss_frame_data+0x247/0x780 net/wireless/scan.c:3317
ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:230
ieee80211_rx_bss_info net/mac80211/ibss.c:1088 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1569 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1922/0x2f80 net/mac80211/ibss.c:1596
ieee80211_iface_process_skb net/mac80211/iface.c:1795 [inline]
ieee80211_iface_work+0xbff/0x13e0 net/mac80211/iface.c:1849
cfg80211_wiphy_work+0x410/0x570 net/wireless/core.c:513
process_one_work+0xa0e/0x1980 kernel/workqueue.c:3302
process_scheduled_works kernel/workqueue.c:3385 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3466
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245