INFO: task syz-executor.0:5466 blocked for more than 143 seconds. Not tainted 6.10.0-rc6-next-20240703-syzkaller-10451-g0b58e108042b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24672 pid:5466 tgid:5466 ppid:5400 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5248 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6600 __schedule_loop kernel/sched/core.c:6677 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6692 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6749 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 device_lock include/linux/device.h:1009 [inline] usbdev_release+0x7a/0x7a0 drivers/usb/core/devio.c:1096 __fput+0x24a/0x8a0 fs/file_table.c:422 __do_sys_close fs/open.c:1566 [inline] __se_sys_close fs/open.c:1551 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1551 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe72d87b9da RSP: 002b:00007ffcee0ec470 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe72d87b9da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b2d360000 R09: 00007fe72d99bf8c R10: 00007ffcee0ec5c0 R11: 0000000000000293 R12: 00007fe72d4000c8 R13: ffffffffffffffff R14: 00007fe72d400000 R15: 0000000000016a23 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:333 [inline] #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:845 [inline] #0: ffffffff8e335860 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6704 5 locks held by kworker/1:2/1147: #0: ffff88801b2c6148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline] #0: ffff88801b2c6148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305 #1: ffffc900042dfd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline] #1: ffffc900042dfd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305 #2: ffff88802397e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #2: ffff88802397e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849 #3: ffff888023a42518 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3206 [inline] #3: ffff888023a42518 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5418 [inline] #3: ffff888023a42518 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] #3: ffff888023a42518 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline] #3: ffff888023a42518 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x25b6/0x5150 drivers/usb/core/hub.c:5903 #4: ffff8880230faf68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5419 [inline] #4: ffff8880230faf68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] #4: ffff8880230faf68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline] #4: ffff8880230faf68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x25f4/0x5150 drivers/usb/core/hub.c:5903 2 locks held by getty/4844: #0: ffff88802f2e90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000311b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 1 lock held by syz-executor.0/5466: #0: ffff88802397e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #0: ffff88802397e190 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x7a/0x7a0 drivers/usb/core/devio.c:1096 1 lock held by syz-executor.0/5783: #0: ffff88802397e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #0: ffff88802397e190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x156/0x780 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.0/5803: #0: ffff88802397e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #0: ffff88802397e190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x156/0x780 drivers/usb/core/devio.c:1051 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc6-next-20240703-syzkaller-10451-g0b58e108042b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xfee/0x1030 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 1092 Comm: kworker/u8:6 Not tainted 6.10.0-rc6-next-20240703-syzkaller-10451-g0b58e108042b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 kernel/kcov.c:207 Code: 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 40 d7 03 00 65 8b 15 50 53 70 7e c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00 RSP: 0018:ffffc9000418f4e0 EFLAGS: 00000286 RAX: ffffffff8140f777 RBX: ffffffff81fa47a0 RCX: ffff888022070000 RDX: 0000000080000000 RSI: ffffffff81fa47a0 RDI: ffffc9000418f5c0 RBP: ffffc9000418f5c0 R08: 0000000000000001 R09: ffffc9000418f6b0 R10: 0000000000000003 R11: ffffffff817f2bd0 R12: ffff888022070000 R13: dffffc0000000000 R14: ffffc9000418f6a0 R15: ffffc9000418f5c0 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005630eaeca600 CR3: 000000000e132000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0x27/0x2a00 arch/x86/kernel/unwind_orc.c:469 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2231 [inline] slab_free mm/slub.c:4473 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4548 skb_kfree_head net/core/skbuff.c:1080 [inline] skb_free_head net/core/skbuff.c:1094 [inline] skb_release_data+0x64d/0x880 net/core/skbuff.c:1121 skb_release_all net/core/skbuff.c:1186 [inline] __kfree_skb net/core/skbuff.c:1200 [inline] sk_skb_reason_drop+0x1a5/0x3d0 net/core/skbuff.c:1238 kfree_skb_reason include/linux/skbuff.h:1260 [inline] kfree_skb include/linux/skbuff.h:1269 [inline] ieee80211_iface_work+0x272/0xf20 net/mac80211/iface.c:1640 cfg80211_wiphy_work+0x2db/0x490 net/wireless/core.c:440 process_one_work kernel/workqueue.c:3224 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305 worker_thread+0x86d/0xd40 kernel/workqueue.c:3383 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244