syzbot has found a reproducer for the following issue on: HEAD commit: 51474ab44abf drm/bridge: aux-hpd-bridge: correct devm_drm_.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=17a7b8ec980000 kernel config: https://syzkaller.appspot.com/x/.config?x=34bb6f7ae9107006 dashboard link: https://syzkaller.appspot.com/bug?extid=3071bdd0a9953bc0d177 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1564be58980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c0b3d0980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8034495d66c0/disk-51474ab4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ccf40ed0b79d/vmlinux-51474ab4.xz kernel image: https://storage.googleapis.com/syzbot-assets/5f1b37ef191d/bzImage-51474ab4.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3071bdd0a9953bc0d177@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task jbd2/sda1-8:2368 blocked for more than 143 seconds. Not tainted 6.9.0-rc7-syzkaller-00158-g51474ab44abf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:jbd2/sda1-8 state:D stack:26032 pid:2368 tgid:2368 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5409 [inline] __schedule+0xca6/0x3170 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6838 io_schedule+0xbf/0x130 kernel/sched/core.c:9044 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:209 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xda/0x110 kernel/sched/wait_bit.c:64 wait_on_bit_io include/linux/wait_bit.h:101 [inline] __wait_on_buffer+0x64/0x70 fs/buffer.c:123 wait_on_buffer include/linux/buffer_head.h:389 [inline] journal_wait_on_commit_record fs/jbd2/commit.c:171 [inline] jbd2_journal_commit_transaction+0x4824/0x65d0 fs/jbd2/commit.c:888 kjournald2+0x1f8/0x8f0 fs/jbd2/journal.c:201 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Showing all locks held in the system: 6 locks held by kworker/0:1/8: #0: ffff888104efdd48 ( (wq_completion)usb_hub_wq ){+.+.}-{0:0} , at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3242 #1: ffffc9000008fd80 ((work_completion)(&hub->events) ){+.+.}-{0:0} , at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3243 #2: ffff88810938f190 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849 #3: ffff888113cc7190 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003 #4: ffff88810c794160 (&dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003 #5: ffffffff890da0a8 ( input_mutex ){+.+.}-{3:3} , at: input_register_device+0xa2b/0x1140 drivers/input/input.c:2389 1 lock held by khungtaskd/29: #0: ffffffff884b4560 ( rcu_read_lock ){....}-{1:2} , at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] , at: rcu_read_lock include/linux/rcupdate.h:781 [inline] , at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 6 locks held by kworker/1:1/35: #0: ffff888104efdd48 ( (wq_completion)usb_hub_wq ){+.+.}-{0:0} , at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3242 #1: ffffc90000257d80 ((work_completion)(&hub->events) ){+.+.}-{0:0} , at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3243 #2: ffff88810975f190 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849 #3: ffff888104ee1190 (&dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003 #4: ffff88811eec1160 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003 #5: ffffffff890da0a8 (input_mutex ){+.+.}-{3:3} , at: input_register_device+0xa2b/0x1140 drivers/input/input.c:2389 6 locks held by kworker/0:2/694: #0: ffff888104efdd48 ( (wq_completion)usb_hub_wq ){+.+.}-{0:0} , at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3242 #1: ffffc90001bdfd80 ((work_completion)(&hub->events) ){+.+.}-{0:0} , at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3243 #2: ffff88810977f190 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849 #3: ffff888113cc6190 (&dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003 #4: ffff888113cc4160 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003 #5: ffffffff890da0a8 (input_mutex ){+.+.}-{3:3} , at: input_register_device+0xa2b/0x1140 drivers/input/input.c:2389 6 locks held by kworker/1:2/725: #0: ffff888104efdd48 ( (wq_completion)usb_hub_wq ){+.+.}-{0:0} , at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3242 #1: ffffc90001d6fd80 ((work_completion)(&hub->events) ){+.+.}-{0:0} , at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3243 #2: ffff888109b4f190 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849 #3: ffff888104ee2190 (&dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295 #4: ffff88811eec0160 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:990 [inline] , at: __device_driver_lock drivers/base/dd.c:1093 [inline] , at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1290 #5: ffffffff890da0a8 (input_mutex ){+.+.}-{3:3} , at: __input_unregister_device+0x136/0x450 drivers/input/input.c:2219 2 locks held by getty/2463: #0: ffff88810f3160a0 (&tty->ldisc_sem ){++++}-{0:0} , at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900000432f0 ( &ldata->atomic_read_lock ){+.+.}-{3:3} , at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 6 locks held by kworker/0:0/2501: 4 locks held by udevd/2525: #0: ffff888104eb68b8 ( &p->lock ){+.+.}-{3:3} , at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182 #1: ffff88810b6b6c88 (&of->mutex #2 ){+.+.}-{3:3} , at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154 #2: ffff8881135110f8 ( kn->active #18){.+.+}-{0:0} , at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155 #3: ffff88810b367190 ( &dev->mutex ){....}-{3:3} , at: device_lock_interruptible include/linux/device.h:995 [inline] , at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142 4 locks held by udevd/2526: 4 locks held by udevd/2527: #0: ffff88810bede540 ( &p->lock ){+.+.}-{3:3} , at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182 #1: ffff888120d2d088 (&of->mutex #2 ){+.+.}-{3:3} , at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154 #2: ffff888112a3a1e8 ( kn->active #18){.+.+}-{0:0} , at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155 #3: ffff888113cc6190 (&dev->mutex ){....}-{3:3} , at: device_lock_interruptible include/linux/device.h:995 [inline] , at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142 5 locks held by kworker/0:4/2528: 4 locks held by udevd/2529: #0: ffff88810e68b418 (&p->lock ){+.+.}-{3:3} , at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182 #1: ffff88811f889888 (&of->mutex #2 ){+.+.}-{3:3} , at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154 #2: ffff8881139ce0f8 ( kn->active#18 ){.+.+}-{0:0} , at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155 #3: ffff888104ee1190 ( &dev->mutex ){....}-{3:3} , at: device_lock_interruptible include/linux/device.h:995 [inline] , at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142 4 locks held by udevd/2531: #0: ffff88810b71ee80 ( &p->lock ){+.+.}-{3:3} , at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182 #1: ffff888120d2f088 (&of->mutex #2){+.+.}-{3:3} , at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154 #2: ffff88810fb7d968 ( kn->active #18){.+.+}-{0:0} , at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155 #3: ffff888113cc7190 (&dev->mutex ){....}-{3:3} , at: device_lock_interruptible include/linux/device.h:995 [inline] , at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc7-syzkaller-00158-g51474ab44abf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf86/0x1240 kernel/hung_task.c:380 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Sending NMI from CPU 1 to CPUs 0: yealink 2-1:36.0: urb_irq_callback - urb status -71 NMI backtrace for cpu 0 CPU: 0 PID: 2528 Comm: kworker/0:4 Not tainted 6.9.0-rc7-syzkaller-00158-g51474ab44abf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: events kfree_rcu_monitor RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x8/0x20 kernel/kcov.c:290 Code: bf 06 00 00 00 e9 b8 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <40> 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 e9 86 fe ff ff 66 0f 1f 44 RSP: 0000:ffffc900000070c0 EFLAGS: 00000046 RAX: 0000000000010002 RBX: ffffc900000074a7 RCX: ffffffff8685fac0 RDX: ffff8881047c9d00 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000006 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000010 R11: 0000000000235118 R12: 0000000000000010 R13: 0000000000000000 R14: ffffc9008000749f R15: 0000000000000010 FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4168ea1c8 CR3: 000000011628c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <IRQ> number+0x5d0/0xb80 lib/vsprintf.c:527 vsnprintf+0x92a/0x1880 lib/vsprintf.c:2890 sprintf+0xcd/0x110 lib/vsprintf.c:3028 print_time kernel/printk/printk.c:1330 [inline] info_print_prefix+0x25c/0x350 kernel/printk/printk.c:1356 record_print_text+0x141/0x400 kernel/printk/printk.c:1405 printk_get_next_message+0x2a6/0x670 kernel/printk/printk.c:2840 console_emit_next_record kernel/printk/printk.c:2880 [inline] console_flush_all+0x3b2/0xd70 kernel/printk/printk.c:2979 console_unlock+0xae/0x290 kernel/printk/printk.c:3048 vprintk_emit kernel/printk/printk.c:2348 [inline] vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2303 dev_vprintk_emit drivers/base/core.c:4950 [inline] dev_printk_emit+0xfb/0x140 drivers/base/core.c:4961 __dev_printk+0xf5/0x270 drivers/base/core.c:4973 _dev_err+0xe5/0x120 drivers/base/core.c:5016 urb_irq_callback+0x454/0x700 drivers/input/misc/yealink.c:416 __usb_hcd_giveback_urb+0x364/0x5c0 drivers/usb/core/hcd.c:1648 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1732 dummy_timer+0x17f6/0x3900 drivers/usb/gadget/udc/dummy_hcd.c:1987 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x8b/0xb0 arch/x86/kernel/apic/apic.c:1043 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 56 4b a1 fa 48 89 df e8 ae c7 a1 fa f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 85 35 96 fa 65 8b 05 d6 db 73 79 85 c0 74 16 5b RSP: 0000:ffffc900014cfa58 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffffffff8d3e3620 RCX: 1ffffffff1954b05 RDX: 0000000000000000 RSI: ffffffff86c7cf00 RDI: ffffffff86e73ce0 RBP: 0000000000000206 R08: 0000000000000001 R09: fffffbfff194f3b1 R10: ffffffff8ca79d8f R11: 0000000000000002 R12: 0000000000000009 R13: dffffc0000000000 R14: ffff88811aeb3700 R15: 1ffff92000299f50 debug_object_deactivate+0x1f0/0x370 lib/debugobjects.c:778 debug_rcu_head_unqueue kernel/rcu/rcu.h:239 [inline] debug_rcu_bhead_unqueue kernel/rcu/tree.c:2949 [inline] kvfree_rcu_bulk+0x12c/0x550 kernel/rcu/tree.c:3026 kvfree_rcu_drain_ready kernel/rcu/tree.c:3207 [inline] kfree_rcu_monitor+0x47b/0x12d0 kernel/rcu/tree.c:3225 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3348 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3429 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.795 msecs --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
