device bridge_slave_1 left promiscuous mode bridge18: port 1(bridge_slave_1) entered disabled state bridge18: port 1(bridge_slave_1) entered blocking state bridge18: port 1(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode INFO: task kworker/0:3:9318 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:3 D23728 9318 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 usb_kill_urb.part.0+0x197/0x220 drivers/usb/core/urb.c:697 usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:692 usb_start_wait_urb+0x252/0x4c0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152 hub_port_init+0x12dc/0x3120 drivers/usb/core/hub.c:4704 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. hub_port_connect drivers/usb/core/hub.c:5070 [inline] hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] port_event drivers/usb/core/hub.c:5361 [inline] hub_event+0x1ccd/0x44a0 drivers/usb/core/hub.c:5441 device bridge_slave_1 left promiscuous mode process_one_work+0x864/0x1570 kernel/workqueue.c:2153 bridge18: port 1(bridge_slave_1) entered disabled state worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: bridge19: port 1(bridge_slave_1) entered blocking state bridge19: port 1(bridge_slave_1) entered disabled state 1 lock held by khungtaskd/1568: device bridge_slave_1 entered promiscuous mode #0: 0000000074702429 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 device bridge_slave_1 left promiscuous mode bridge19: port 1(bridge_slave_1) entered disabled state 1 lock held by in:imklog/7842: #0: 00000000de9a7e17 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 5 locks held by kworker/0:3/9318: #0: 0000000094d31cde ((wq_completion)"usb_hub_wq"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000000db91dfd ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000001b4d9df9 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline] #2: 000000001b4d9df9 (&dev->mutex){....}, at: hub_event+0x11e/0x44a0 drivers/usb/core/hub.c:5387 #3: 0000000004bb9b8a (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2983 [inline] #3: 0000000004bb9b8a (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5069 [inline] #3: 0000000004bb9b8a (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] #3: 0000000004bb9b8a (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5361 [inline] #3: 0000000004bb9b8a (&port_dev->status_lock){+.+.}, at: hub_event+0x1cb8/0x44a0 drivers/usb/core/hub.c:5441 #4: 00000000066426fa (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b9/0x3120 drivers/usb/core/hub.c:4578 2 locks held by kworker/0:33/6723: #0: 00000000272d7379 ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000e34d2d42 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 3 locks held by kworker/0:35/6729: #0: 00000000f8532f2e ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000009bd40b3e (deferred_process_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000005ecb576a (rtnl_mutex){+.+.}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:150 2 locks held by syz-executor.0/10074: #0: 000000006690e6d9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.0/10087: #0: 000000006690e6d9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.4/10068: #0: 000000005ecb576a (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 000000005ecb576a (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 #1: 00000000c2568b0b (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #1: 00000000c2568b0b (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 1 lock held by syz-executor.4/10085: #0: 000000005ecb576a (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 000000005ecb576a (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 3 locks held by syz-executor.3/10071: #0: 000000006690e6d9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 #2: 000000005ecb576a (rtnl_mutex){+.+.}, at: nl80211_pre_doit+0x34f/0x620 net/wireless/nl80211.c:13089 2 locks held by syz-executor.2/10073: #0: 000000006690e6d9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.1/10083: #0: 000000006690e6d9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.1/10088: #0: 000000006690e6d9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.1/10091: #0: 000000006690e6d9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.5/10084: #0: 000000006690e6d9 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 00000000aa735e60 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 bridge19: port 1(bridge_slave_1) entered blocking state ============================================= bridge19: port 1(bridge_slave_1) entered disabled state NMI backtrace for cpu 0 CPU: 0 PID: 1568 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4698 Comm: systemd-udevd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:rcu_is_watching+0x0/0xc0 kernel/rcu/tree.c:1021 Code: 46 00 e9 24 f4 ff ff 48 8b bc 24 a8 00 00 00 e8 f6 d7 46 00 e9 f4 f3 ff ff 48 8b 7c 24 18 e8 07 d9 46 00 e9 c8 f3 ff ff 66 90 <55> 53 48 83 ec 08 65 ff 05 13 53 b0 7e e8 2e 94 25 02 48 c7 c3 c0 RSP: 0018:ffff88809b26fb98 EFLAGS: 00000293 RAX: ffff88809b262040 RBX: ffff8880af2b0780 RCX: ffffffff8344b70d RDX: 0000000000000000 RSI: ffffffff8344ba86 RDI: 0000000000000001 RBP: ffff8880b59ce100 R08: 00000000594ea6fa R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88823b88e2a0 R13: 0000000000000000 R14: 0000000000000004 R15: ffff8880af2b0780 FS: 00007f7cdc88e8c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7cdb6e5de0 CR3: 000000009bed9000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock include/linux/rcupdate.h:628 [inline] aa_file_perm+0x4bb/0xd20 security/apparmor/file.c:613 common_file_perm+0x445/0x850 security/apparmor/lsm.c:461 security_file_permission+0x54/0x220 security/security.c:871 iterate_dir+0xa3/0x5c0 fs/readdir.c:36 __do_sys_getdents fs/readdir.c:271 [inline] __se_sys_getdents+0x175/0x2d0 fs/readdir.c:252 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f7cdb6d8f2b Code: fc ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 57 41 56 48 63 ff 41 55 41 54 b8 4e 00 00 00 55 53 48 89 f3 48 83 ec 08 0f 05 <48> 3d 00 f0 ff ff 77 55 48 8d 2c 06 49 89 c4 48 39 ee 73 34 90 44 RSP: 002b:00007fffaba51f00 EFLAGS: 00000206 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 000056057dc720b0 RCX: 00007f7cdb6d8f2b RDX: 0000000000008000 RSI: 000056057dc720b0 RDI: 000000000000000f RBP: 000056057dc720b0 R08: 00007f7cdb9bf308 R09: 0000000000008040 R10: 00007f7cdb9beb58 R11: 0000000000000206 R12: fffffffffffffe50 R13: 0000000000000000 R14: 00000000000000ff R15: 000056057dc5bec0 device bridge_slave_1 entered promiscuous mode