IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready team0: Port device team_slave_1 added IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready INFO: task syz-executor1:15591 blocked for more than 120 seconds. Not tainted 4.17.0+ #85 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D24720 15591 4590 0x00000004 Call Trace: context_switch kernel/sched/core.c:2856 [inline] __schedule+0x801/0x1e30 kernel/sched/core.c:3498 schedule+0xef/0x430 kernel/sched/core.c:3542 blk_queue_enter+0x8da/0xdf0 block/blk-core.c:949 generic_make_request+0x651/0x1790 block/blk-core.c:2382 submit_bio+0xba/0x460 block/blk-core.c:2555 submit_bio_wait+0x134/0x1e0 block/bio.c:947 blkdev_issue_flush+0x204/0x300 block/blk-flush.c:548 blkdev_fsync+0x93/0xd0 fs/block_dev.c:629 vfs_fsync_range+0x140/0x220 fs/sync.c:197 vfs_fsync+0x29/0x30 fs/sync.c:211 __loop_update_dio+0x4de/0x6a0 drivers/block/loop.c:207 loop_update_dio drivers/block/loop.c:621 [inline] loop_change_fd drivers/block/loop.c:695 [inline] lo_ioctl+0xd28/0x2190 drivers/block/loop.c:1402 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x9b6/0x2020 block/ioctl.c:601 IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready block_ioctl+0xee/0x130 fs/block_dev.c:1877 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1cf/0x16f0 fs/ioctl.c:684 IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a09 Code: Bad RIP value. RSP: 002b:00007f8218519c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f821851a6d4 RCX: 0000000000455a09 RDX: 0000000000000013 RSI: 0000000000004c06 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000002d4 R14: 00000000006f9480 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by khungtaskd/893: #0: 00000000cfb82d0b (rcu_read_lock){....}, at: check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: 00000000cfb82d0b (rcu_read_lock){....}, at: watchdog+0x1ff/0xf60 kernel/hung_task.c:249 #1: 00000000cfb82d0b (rcu_read_lock){....}, at: debug_show_all_locks+0xc8/0x40c kernel/locking/lockdep.c:4461 1 lock held by rsyslogd/4423: #0: 0000000063b430f7 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1a9/0x1e0 fs/file.c:766 2 locks held by getty/4513: #0: 00000000612aef85 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000009db151f8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4514: #0: 00000000c154e5b0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000008ea25266 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4515: #0: 000000007d0eb7a1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000009bcd6b5f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4516: #0: 000000004149daf0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000007fffbbea (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4517: #0: 00000000493b4720 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000ce5d0d23 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4518: #0: 00000000557d8efe (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000fe07022c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4519: #0: 0000000088de99ed (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000006531902f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 1 lock held by syz-executor1/15591: #0: 0000000008bcb54f (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8d/0x2190 drivers/block/loop.c:1393 1 lock held by blkid/15927: #0: 0000000008bcb54f (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8d/0x2190 drivers/block/loop.c:1393 3 locks held by sh/16065: #0: 00000000cfe56d1f (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1805 [inline] #0: 00000000cfe56d1f (&rq->lock){-.-.}, at: __schedule+0x246/0x1e30 kernel/sched/core.c:3436 #1: 00000000cfb82d0b (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:413 [inline] #1: 00000000cfb82d0b (rcu_read_lock){....}, at: update_curr+0x368/0xbe0 kernel/sched/fair.c:831 #2: 00000000e8faefe4 (&sig->wait_chldexit){....}, at: __wake_up_common_lock+0x190/0x300 kernel/sched/wait.c:118 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 893 Comm: khungtaskd Not tainted 4.17.0+ #85 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+0x1b9/0x294 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x151/0x192 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:138 [inline] check_hung_task kernel/hung_task.c:132 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] watchdog+0xc10/0xf60 kernel/hung_task.c:249 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16084 Comm: ip Not tainted 4.17.0+ #85 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x16/0x20 kernel/kcov.c:188 Code: 48 89 e5 48 8b 4d 08 e8 88 fe ff ff 5d c3 66 0f 1f 44 00 00 55 89 f2 89 fe bf 05 00 00 00 48 89 e5 48 8b 4d 08 e8 6a fe ff ff <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 f2 48 89 fe bf 07 00 00 00 RSP: 0018:ffff8801917a68e0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff86578c19 RDX: 000000000000000e RSI: 000000000000001f RDI: 0000000000000005 RBP: ffff8801917a68e0 R08: ffff8801bf1e6080 R09: ffff8801a30eb67c R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: ffff8801c6c670c0 R13: ffff8801a30eb5fc R14: ffff8801a30eb638 R15: 000000000000000f FS: 00007fded88f5700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000063f210 CR3: 00000001aed3f000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inet_fill_link_af+0x1c9/0x2c0 net/ipv4/devinet.c:1742 rtnl_fill_link_af net/core/rtnetlink.c:1503 [inline] rtnl_fill_ifinfo+0x297a/0x3fb0 net/core/rtnetlink.c:1630 rtnl_dump_ifinfo+0x913/0x1140 net/core/rtnetlink.c:1868 netlink_dump+0x507/0xd20 net/netlink/af_netlink.c:2226 __netlink_dump_start+0x51a/0x780 net/netlink/af_netlink.c:2323 netlink_dump_start include/linux/netlink.h:214 [inline] rtnetlink_rcv_msg+0x7f7/0xc10 net/core/rtnetlink.c:4609 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4664 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:643 __sys_sendto+0x3d7/0x670 net/socket.c:1814 __do_sys_sendto net/socket.c:1826 [inline] __se_sys_sendto net/socket.c:1822 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1822 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fded8016282 Code: 48 83 c8 ff eb ea 90 90 53 48 83 ec 20 8b 05 81 d3 2a 00 85 c0 75 21 45 31 c9 45 31 c0 4c 63 d1 48 63 ff b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 61 48 83 c4 20 5b c3 48 89 54 24 08 89 0c 24 RSP: 002b:00007ffe1b773e40 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000006395c0 RCX: 00007fded8016282 RDX: 000000000000001c RSI: 00007ffe1b773e70 RDI: 0000000000000013 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1b7746b0 R13: 0000000000000000 R14: 00007ffe1b773ec8 R15: 00007ffe1b7746d0