device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state INFO: task kworker/0:1:30093 blocked for more than 140 seconds. Not tainted 4.19.85-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (00000000bcecb61d): kobject_cleanup, parent 00000000a882f036 kworker/0:1 D29296 30093 2 0x80000000 Workqueue: events linkwatch_event kobject: 'rx-0' (00000000bcecb61d): auto cleanup 'remove' event kobject: 'rx-0' (00000000bcecb61d): kobject_uevent_env Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'rx-0' (00000000bcecb61d): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (00000000bcecb61d): auto cleanup kobject_del schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 kobject: 'rx-0' (00000000bcecb61d): calling ktype release __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'rx-0': free name kobject: 'tx-0' (00000000995d0e6e): kobject_cleanup, parent 00000000a882f036 kobject: 'tx-0' (00000000995d0e6e): auto cleanup 'remove' event kobject: 'tx-0' (00000000995d0e6e): kobject_uevent_env kobject: 'tx-0' (00000000995d0e6e): kobject_uevent_env: uevent_suppress caused the event to drop! mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'tx-0' (00000000995d0e6e): auto cleanup kobject_del kobject: 'tx-0' (00000000995d0e6e): calling ktype release kobject: 'tx-0': free name rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 kobject: 'queues' (00000000a882f036): kobject_cleanup, parent (null) linkwatch_event+0xf/0x70 net/core/link_watch.c:236 kobject: 'queues' (00000000a882f036): calling ktype release kobject: 'queues' (00000000a882f036): kset_release process_one_work+0x989/0x1750 kernel/workqueue.c:2153 kobject: 'queues': free name kobject: 'bridge313' (00000000bf295bca): kobject_uevent_env kobject: 'bridge313' (00000000bf295bca): kobject_uevent_env: uevent_suppress caused the event to drop! worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kobject: 'batman_adv' (00000000183b7216): kobject_uevent_env kobject: 'batman_adv' (00000000183b7216): kobject_uevent_env: filter function caused the event to drop! kthread+0x354/0x420 kernel/kthread.c:246 kobject: 'batman_adv' (00000000183b7216): kobject_cleanup, parent (null) ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task kworker/1:0:19000 blocked for more than 140 seconds. kobject: 'batman_adv' (00000000183b7216): calling ktype release Not tainted 4.19.85-syzkaller #0 kobject: (00000000183b7216): dynamic_kobj_release "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'batman_adv': free name kworker/1:0 D28536 19000 2 0x80000000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:150 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task syz-executor.2:15484 blocked for more than 140 seconds. Not tainted 4.19.85-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29368 15484 7650 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 sock_do_ioctl+0x24e/0x2f0 net/socket.c:963 sock_ioctl+0x325/0x610 net/socket.c:1074 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a639 Code: Bad RIP value. RSP: 002b:00007f76e9c87c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a639 RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76e9c886d4 R13: 00000000004c435a R14: 00000000004d8998 R15: 00000000ffffffff INFO: task syz-executor.2:15486 blocked for more than 140 seconds. kobject: 'rx-0' (000000000fe791be): kobject_cleanup, parent 000000008c805c3b kobject: 'rx-0' (000000000fe791be): auto cleanup 'remove' event kobject: 'rx-0' (000000000fe791be): kobject_uevent_env kobject: 'rx-0' (000000000fe791be): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (000000000fe791be): auto cleanup kobject_del kobject: 'rx-0' (000000000fe791be): calling ktype release Not tainted 4.19.85-syzkaller #0 kobject: 'rx-0': free name "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'tx-0' (000000002fe22432): kobject_cleanup, parent 000000008c805c3b syz-executor.2 D kobject: 'tx-0' (000000002fe22432): auto cleanup 'remove' event 29368 15486 7650 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'tx-0' (000000002fe22432): kobject_uevent_env kobject: 'tx-0' (000000002fe22432): kobject_uevent_env: uevent_suppress caused the event to drop! schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'tx-0' (000000002fe22432): auto cleanup kobject_del kobject: 'tx-0' (000000002fe22432): calling ktype release mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'tx-0': free name rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 kobject: 'queues' (000000008c805c3b): kobject_cleanup, parent (null) sock_do_ioctl+0x24e/0x2f0 net/socket.c:963 sock_ioctl+0x325/0x610 net/socket.c:1074 kobject: 'queues' (000000008c805c3b): calling ktype release kobject: 'queues' (000000008c805c3b): kset_release vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688 kobject: 'queues': free name kobject: 'bridge312' (000000007ead200d): kobject_uevent_env kobject: 'bridge312' (000000007ead200d): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (00000000710311a0): kobject_uevent_env kobject: 'batman_adv' (00000000710311a0): kobject_uevent_env: filter function caused the event to drop! ksys_ioctl+0xab/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 kobject: 'batman_adv' (00000000710311a0): kobject_cleanup, parent (null) do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'batman_adv' (00000000710311a0): calling ktype release RIP: 0033:0x45a639 kobject: (00000000710311a0): dynamic_kobj_release Code: Bad RIP value. RSP: 002b:00007f76e9c66c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a639 kobject: 'batman_adv': free name RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000005 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76e9c676d4 R13: 00000000004c435a R14: 00000000004d8998 R15: 00000000ffffffff INFO: task syz-executor.0:15495 blocked for more than 140 seconds. Not tainted 4.19.85-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (0000000081068c1a): kobject_cleanup, parent 000000002f812e38 syz-executor.0 D28216 15495 1 0x00000004 Call Trace: kobject: 'rx-0' (0000000081068c1a): auto cleanup 'remove' event kobject: 'rx-0' (0000000081068c1a): kobject_uevent_env kobject: 'rx-0' (0000000081068c1a): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (0000000081068c1a): auto cleanup kobject_del kobject: 'rx-0' (0000000081068c1a): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (0000000011c75cfb): kobject_cleanup, parent 000000002f812e38 context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'tx-0' (0000000011c75cfb): auto cleanup 'remove' event kobject: 'tx-0' (0000000011c75cfb): kobject_uevent_env kobject: 'tx-0' (0000000011c75cfb): kobject_uevent_env: uevent_suppress caused the event to drop! schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 kobject: 'tx-0' (0000000011c75cfb): auto cleanup kobject_del __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'tx-0' (0000000011c75cfb): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (000000002f812e38): kobject_cleanup, parent (null) kobject: 'queues' (000000002f812e38): calling ktype release kobject: 'queues' (000000002f812e38): kset_release kobject: 'queues': free name kobject: 'bridge311' (00000000a58c5953): kobject_uevent_env kobject: 'bridge311' (00000000a58c5953): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (00000000ea6fb828): kobject_uevent_env kobject: 'batman_adv' (00000000ea6fb828): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000ea6fb828): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000ea6fb828): calling ktype release mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: (00000000ea6fb828): dynamic_kobj_release rtnl_lock net/core/rtnetlink.c:77 [inline] rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 kobject: 'batman_adv': free name netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4765 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x537/0x720 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1787 __do_sys_sendto net/socket.c:1799 [inline] __se_sys_sendto net/socket.c:1795 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1795 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x414333 Code: 1f 84 00 00 00 00 00 bf b5 30 44 00 b9 18 00 00 00 48 89 d6 f3 a6 75 0c 48 c7 00 30 41 41 00 e9 3b ff ff ff 48 83 ec 08 31 c0 <48> 89 d6 bf 30 31 44 00 e8 f0 cc 00 00 b8 14 fc ff ff 48 83 c4 08 RSP: 002b:00007ffc4c4590e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414333 RDX: 0000000000000028 RSI: 0000000000a72250 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc4c4590f0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003 Showing all locks held in the system: 1 lock held by khungtaskd/1039: #0: 00000000e4212b59 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 3 locks held by kworker/0:2/2729: #0: 000000000c2e1e17 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000000c2e1e17 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000000c2e1e17 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000000c2e1e17 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000000c2e1e17 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000000c2e1e17 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000000c2e1e17 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000da385312 ((addr_chk_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 000000002eee9597 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by udevd/3592: 1 lock held by rsyslogd/7478: #0: 000000002fbd6868 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767 2 locks held by getty/7602: #0: 000000001252fb26 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000789c7ba6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7603: #0: 00000000fdbe5b13 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000a1efe10a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7604: #0: 00000000811afdae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b0f5c76c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7605: #0: 000000008f311e03 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000ebd7ec61 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7606: #0: 000000006d7cd90a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000000bfc5932 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7607: #0: 0000000002753e53 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000096b65e4f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7608: #0: 000000003a7817e5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000ee754843 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 4 locks held by kworker/u4:5/7101: #0: 0000000016001bb6 ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000016001bb6 ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000016001bb6 ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000016001bb6 ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000016001bb6 ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000016001bb6 ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000016001bb6 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000038d67fda (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 000000000bb8aa6a (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x970 net/core/net_namespace.c:520 #3: 000000002eee9597 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/0:1/30093: #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000035528bb7 ((linkwatch_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 000000002eee9597 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/1:0/19000: #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000d73de793 ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000059ba02f5 (deferred_process_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 000000002eee9597 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.2/15484: #0: 000000002eee9597 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.2/15486: #0: 000000002eee9597 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.0/15495: #0: 000000002eee9597 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 000000002eee9597 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 kobject: 'rx-0' (000000005d51b4a2): kobject_cleanup, parent 00000000702f458a kobject: 'rx-0' (000000005d51b4a2): auto cleanup 'remove' event ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1039 Comm: khungtaskd Not tainted 4.19.85-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3592 Comm: udevd Not tainted 4.19.85-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:sock_poll+0x2ac/0x340 net/socket.c:1129 Code: fc 4c 89 e2 4c 89 f6 4c 89 ef ff d3 8b 4d d0 09 c8 41 89 c4 e8 f5 8c 0b fc 44 89 e0 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c7 45 cc ff ff ff ff e9 c8 fd ff ff 45 31 e4 eb d8 e8 7d 24 42 RSP: 0018:ffff888096557a60 EFLAGS: 00000296 RAX: 000000000000030c RBX: ffff8880962d0970 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff855f91cb RDI: 0000000000000004 RBP: ffff888096557b00 R08: ffff88809654c680 R09: ffffed1013213910 R10: ffffed101321390f R11: ffff88809909c87f R12: ffff888096557b80 R13: ffffffff855f8f30 R14: 1ffff11012caaf4f R15: ffff8880964b6d40 FS: 00007f8327d687a0(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000f2f320 CR3: 00000000964b7000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ep_send_events_proc+0x20c/0xc10 fs/eventpoll.c:1663 ep_scan_ready_list+0x305/0xb20 fs/eventpoll.c:708 ep_send_events fs/eventpoll.c:1713 [inline] ep_poll+0x3b4/0xd10 fs/eventpoll.c:1840 do_epoll_wait+0x1b3/0x200 fs/eventpoll.c:2198 __do_sys_epoll_wait fs/eventpoll.c:2208 [inline] __se_sys_epoll_wait fs/eventpoll.c:2205 [inline] __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2205 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f832747c943 Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 RSP: 002b:00007ffcbb133c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f832747c943 RDX: 0000000000000008 RSI: 00007ffcbb133d70 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000f047a0 R15: 0000000000ef8030 kobject: 'rx-0' (000000005d51b4a2): kobject_uevent_env