Hello, syzbot found the following issue on: HEAD commit: 4a9fe2a8ac53 dt-bindings: usb: dwc3-imx8mp: add compatible.. 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=12037380580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4510af5d637450fb dashboard link: https://syzkaller.appspot.com/bug?extid=8b9cb14e5b04325684a9 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/883c5319cb52/disk-4a9fe2a8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/caf4421ed2ef/vmlinux-4a9fe2a8.xz kernel image: https://storage.googleapis.com/syzbot-assets/d8e3beb01d49/bzImage-4a9fe2a8.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8b9cb14e5b04325684a9@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task kworker/1:5:4942 blocked for more than 143 seconds. Not tainted 6.12.0-rc1-syzkaller-00027-g4a9fe2a8ac53 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:5 state:D stack:22096 pid:4942 tgid:4942 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> context_switch kernel/sched/core.c:5315 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6767 schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116 __flush_work+0x776/0xc30 kernel/workqueue.c:4217 __cancel_work_sync+0x10c/0x130 kernel/workqueue.c:4337 quiesce_and_remove_host drivers/usb/storage/usb.c:939 [inline] usb_stor_disconnect+0xc5/0x270 drivers/usb/storage/usb.c:1178 usb_unbind_interface+0x1e8/0x970 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:569 [inline] device_remove+0x122/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:576 device_del+0x396/0x9f0 drivers/base/core.c:3864 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2304 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5903 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 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: task kworker/0:4:4957 blocked for more than 143 seconds. Not tainted 6.12.0-rc1-syzkaller-00027-g4a9fe2a8ac53 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:21456 pid:4957 tgid:4957 ppid:2 flags:0x00004000 Workqueue: events_freezable usb_stor_scan_dwork Call Trace: <TASK> context_switch kernel/sched/core.c:5315 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6767 blk_mq_freeze_queue_wait+0x146/0x190 block/blk-mq.c:139 blk_freeze_queue block/blk-mq.c:166 [inline] blk_mq_freeze_queue block/blk-mq.c:175 [inline] blk_mq_update_tag_set_shared+0xba/0x160 block/blk-mq.c:4035 blk_mq_add_queue_tag_set block/blk-mq.c:4069 [inline] blk_mq_init_allocated_queue+0xd59/0x11f0 block/blk-mq.c:4343 blk_mq_alloc_queue+0x1f8/0x2f0 block/blk-mq.c:4158 scsi_alloc_sdev+0x897/0xd90 drivers/scsi/scsi_scan.c:337 scsi_probe_and_add_lun+0x525/0x7b0 drivers/scsi/scsi_scan.c:1210 scsi_sequential_lun_scan drivers/scsi/scsi_scan.c:1393 [inline] __scsi_scan_target+0x42c/0x4e0 drivers/scsi/scsi_scan.c:1764 scsi_scan_channel drivers/scsi/scsi_scan.c:1845 [inline] scsi_scan_channel+0x149/0x1e0 drivers/scsi/scsi_scan.c:1821 scsi_scan_host_selected+0x2ae/0x370 drivers/scsi/scsi_scan.c:1874 do_scsi_scan_host+0x1ef/0x260 drivers/scsi/scsi_scan.c:2013 scsi_scan_host drivers/scsi/scsi_scan.c:2043 [inline] scsi_scan_host+0x3a7/0x440 drivers/scsi/scsi_scan.c:2031 usb_stor_scan_dwork+0xad/0x280 drivers/usb/storage/usb.c:998 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 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: 1 lock held by khungtaskd/30: #0: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 4 locks held by kworker/u8:3/46: #0: ffff888100abf948 ((wq_completion)async){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90000517d80 ((work_completion)(&entry->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffff888111f36378 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #2: ffff888111f36378 (&dev->mutex){....}-{3:3}, at: __device_attach_async_helper+0x84/0x290 drivers/base/dd.c:973 #3: ffff888105fb4688 (&q->limits_lock){+.+.}-{3:3}, at: queue_limits_start_update include/linux/blkdev.h:926 [inline] #3: ffff888105fb4688 (&q->limits_lock){+.+.}-{3:3}, at: sd_revalidate_disk.isra.0+0x27a/0xa420 drivers/scsi/sd.c:3727 3 locks held by kworker/1:2/800: #0: ffff888100080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90001c0fd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffffffff88ec6a78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297 2 locks held by kworker/u8:5/1175: #0: ffff88811b950948 ((wq_completion)scsi_tmf_1){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc9000253fd80 ((work_completion)(&(&cmd->abort_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 2 locks held by getty/2604: #0: ffff888113be10a0 (&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+0xfba/0x1480 drivers/tty/n_tty.c:2211 3 locks held by kworker/0:2/4915: #0: ffff888105adf548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90001fbfd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffff888109f5a190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #2: ffff888109f5a190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849 2 locks held by udevd/4933: #0: ffff8881f583d6d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:593 [inline] #0: ffff8881f583d6d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1505 [inline] #0: ffff8881f583d6d8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1804 [inline] #0: ffff8881f583d6d8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x293/0x34b0 kernel/sched/core.c:6575 #1: ffff8881120e4d58 (&ep->lock){....}-{2:2}, at: ep_done_scan+0x2e/0x590 fs/eventpoll.c:726 5 locks held by kworker/1:5/4942: #0: ffff888105adf548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc9000252fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffff888109b68190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #2: ffff888109b68190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849 #3: ffff888117769190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #3: ffff888117769190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295 #4: ffff88811b123160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #4: ffff88811b123160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff88811b123160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293 4 locks held by kworker/0:4/4957: #0: ffff888100081548 ((wq_completion)events_freezable){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90001f4fd80 ((work_completion)(&(&us->scan_dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffff888111db80e0 (&shost->scan_mutex){+.+.}-{3:3}, at: scsi_scan_host_selected+0x160/0x370 drivers/scsi/scsi_scan.c:1866 #3: ffff888111db82d0 (&set->tag_list_lock){+.+.}-{3:3}, at: blk_mq_add_queue_tag_set block/blk-mq.c:4060 [inline] #3: ffff888111db82d0 (&set->tag_list_lock){+.+.}-{3:3}, at: blk_mq_init_allocated_queue+0x7bc/0x11f0 block/blk-mq.c:4343 1 lock held by usb-storage/9821: #0: ffff888111db8d08 (&us_interface_key[i]){+.+.}-{3:3}, at: usb_stor_control_thread+0xd6/0xac0 drivers/usb/storage/usb.c:394 4 locks held by kworker/u8:4/10837: #0: ffff888100abb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc9000f707d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffffffff8a18c450 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xb40 net/core/net_namespace.c:580 #3: ffffffff8a1a1d68 (rtnl_mutex){+.+.}-{3:3}, at: cleanup_net+0x503/0xb40 net/core/net_namespace.c:616 1 lock held by syz.1.1772/11741: #0: ffffffff88ec6a78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00027-g4a9fe2a8ac53 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 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:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf0c/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 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: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 4931 Comm: kworker/0:3 Not tainted 6.12.0-rc1-syzkaller-00027-g4a9fe2a8ac53 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events drain_vmap_area_work RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:86 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0xfb/0x1a0 mm/kasan/generic.c:189 Code: d2 74 1e 41 83 e2 07 49 39 d1 75 0a 45 3a 11 b8 01 00 00 00 7c 0b 44 89 c2 e8 11 eb ff ff 83 f0 01 5b 5d 41 5c c3 cc cc cc cc <48> 85 d2 74 4f 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 41 80 38 00 RSP: 0018:ffffc90000007bd0 EFLAGS: 00000083 RAX: fffffbfff1f55db4 RBX: fffffbfff1f55db5 RCX: ffffffff813260ce RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8faaeda0 RBP: fffffbfff1f55db4 R08: 0000000000000000 R09: fffffbfff1f55db4 R10: ffffffff8faaeda7 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88811e23e2f8 R14: 000000000000004f R15: ffff88811e23d7c0 FS: 0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2add4eff0c CR3: 0000000105e80000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <IRQ> instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228 __lock_acquire+0x1443/0x3ce0 kernel/locking/lockdep.c:5198 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 seqcount_lockdep_reader_access include/linux/seqlock.h:72 [inline] timekeeping_debug_get_ns+0x86/0x5b0 kernel/time/timekeeping.c:256 timekeeping_get_ns kernel/time/timekeeping.c:401 [inline] ktime_get+0xd9/0x1a0 kernel/time/timekeeping.c:850 clockevents_program_event+0x155/0x380 kernel/time/clockevents.c:326 tick_program_event+0xa9/0x140 kernel/time/tick-oneshot.c:44 hrtimer_interrupt+0x36d/0x800 kernel/time/hrtimer.c:1830 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1043 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] sysvec_apic_timer_interrupt+0x8b/0xb0 arch/x86/kernel/apic/apic.c:1037 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__kasan_poison_pages+0x0/0x40 mm/kasan/common.c:139 Code: 00 00 b8 01 00 00 00 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 48 b8 00 00 00 00 00 16 00 00 89 f1 0f b6 d2 48 01 c7 RSP: 0018:ffffc900024bf9b0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0004e6dec0 RBP: 0000000000139b7b R08: 0000000000000001 R09: fffffbfff1f55db4 R10: ffffffff8faaeda7 R11: 0000000000000000 R12: 0000000000000001 R13: ffffea0004e6dec0 R14: 0000000000000000 R15: 0000000000001000 kasan_poison_pages include/linux/kasan.h:114 [inline] free_pages_prepare mm/page_alloc.c:1130 [inline] free_unref_page+0x1e2/0xb50 mm/page_alloc.c:2638 kasan_depopulate_vmalloc_pte+0x63/0x80 mm/kasan/shadow.c:408 apply_to_pte_range mm/memory.c:2817 [inline] apply_to_pmd_range mm/memory.c:2861 [inline] apply_to_pud_range mm/memory.c:2897 [inline] apply_to_p4d_range mm/memory.c:2933 [inline] __apply_to_page_range+0x5fd/0xd30 mm/memory.c:2967 kasan_release_vmalloc+0xac/0xc0 mm/kasan/shadow.c:525 purge_vmap_node+0x3fb/0x930 mm/vmalloc.c:2204 __purge_vmap_area_lazy+0x9c5/0xc00 mm/vmalloc.c:2288 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2322 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 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> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
