device ipvlan911 entered promiscuous mode INFO: task kworker/u4:7:23172 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 netlink: 'syz-executor.1': attribute type 12 has an invalid length. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:7 D26184 23172 2 0x80000000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 device ipvlan938 entered promiscuous mode schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 ieee80211 phy629: Selected rate control algorithm 'minstrel_ht' device ipvlan912 entered promiscuous mode do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 netlink: 'syz-executor.1': attribute type 12 has an invalid length. flush_workqueue+0x40b/0x13e0 kernel/workqueue.c:2713 ieee80211 phy630: Selected rate control algorithm 'minstrel_ht' rxrpc_release_sock net/rxrpc/af_rxrpc.c:906 [inline] rxrpc_release+0x25b/0x530 net/rxrpc/af_rxrpc.c:936 __sock_release net/socket.c:599 [inline] sock_release+0x87/0x1d0 net/socket.c:619 afs_close_socket+0x1c7/0x320 fs/afs/rxrpc.c:119 device ipvlan939 entered promiscuous mode device ipvlan913 entered promiscuous mode afs_net_exit+0x1c1/0x310 fs/afs/main.c:155 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153 netlink: 'syz-executor.1': attribute type 12 has an invalid length. cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 ieee80211 phy631: Selected rate control algorithm 'minstrel_ht' worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 device ipvlan940 entered promiscuous mode ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: 2 locks held by kworker/u4:3/100: device ipvlan914 entered promiscuous mode #0: 0000000079119702 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 0000000079119702 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000000dfb0792 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000000dfb0792 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 netlink: 'syz-executor.1': attribute type 12 has an invalid length. 1 lock held by khungtaskd/1570: #0: 000000000dfb0792 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 2 locks held by kworker/u4:4/3569: 2 locks held by systemd-udevd/4698: #0: 0000000066382bc1 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478 device ipvlan941 entered promiscuous mode #1: 0000000079119702 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #1: 0000000079119702 (&rq->lock){-.-.}, at: ttwu_queue kernel/sched/core.c:1841 [inline] #1: 0000000079119702 (&rq->lock){-.-.}, at: try_to_wake_up+0x6d0/0x1050 kernel/sched/core.c:2052 ieee80211 phy632: Selected rate control algorithm 'minstrel_ht' 1 lock held by in:imklog/7809: #0: 00000000380b2ccc (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 device ipvlan915 entered promiscuous mode 5 locks held by kworker/0:3/8680: 3 locks held by kworker/1:3/9152: #0: 0000000079119702 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 0000000079119702 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000000dfb0792 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000000dfb0792 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 netlink: 'syz-executor.1': attribute type 12 has an invalid length. #2: 000000003c678fa8 (rtnl_mutex){+.+.}, at: addrconf_dad_work+0x9c/0x10a0 net/ipv6/addrconf.c:3989 device ipvlan942 entered promiscuous mode 2 locks held by kworker/u4:5/9397: #0: 0000000092f005ea ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000098428cb4 (connector_reaper_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 device ipvlan916 entered promiscuous mode 2 locks held by kworker/u4:6/9493: #0: 0000000092f005ea ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 ieee80211 phy633: Selected rate control algorithm 'minstrel_ht' #1: 00000000fb51343d ((reaper_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 3 locks held by kworker/u4:7/23172: #0: 0000000019cb8307 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000002bcdda68 (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000b42ddfac (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-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+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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8680 Comm: kworker/0:3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events ipvlan_process_multicast RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:rcu_rnp_online_cpus kernel/rcu/tree.c:212 [inline] RIP: 0010:rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1080 [inline] RIP: 0010:rcu_lockdep_current_cpu_online+0x116/0x1b0 kernel/rcu/tree.c:1068 Code: 7b 28 4c 8b 6b 20 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 99 00 00 00 49 8d 7d 68 48 8b 5b 28 48 89 f8 48 c1 e8 03 80 3c 28 00 <75> 73 49 8b 45 68 48 85 c3 0f 84 33 ff ff ff bf 01 00 00 00 e8 31 RSP: 0018:ffff8880ba0076f8 EFLAGS: 00000246 RAX: 1ffffffff13f105d RBX: 0000000000000001 RCX: ffffffff83771e23 RDX: 1ffffffff139f5e0 RSI: ffffffff83771e31 RDI: ffffffff89f882e8 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff89f88280 R13: ffffffff89f88280 R14: 00000000000001b2 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000700 CR3: 0000000009e6d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held+0xc3/0x110 kernel/rcu/update.c:285 find_rr_leaf net/ipv6/route.c:713 [inline] rt6_select net/ipv6/route.c:769 [inline] fib6_table_lookup+0x524/0xf40 net/ipv6/route.c:1876 ip6_pol_route+0x180/0x1270 net/ipv6/route.c:1909 fib6_rule_lookup+0x10b/0x4e0 net/ipv6/fib6_rules.c:118 ip6_route_input_lookup net/ipv6/route.c:1990 [inline] ip6_route_input+0x6c0/0xaa0 net/ipv6/route.c:2125 ip6_rcv_finish_core.constprop.0.isra.0+0xd7/0x550 net/ipv6/ip6_input.c:63 ip6_rcv_finish+0x176/0x2f0 net/ipv6/ip6_input.c:74 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0xf2/0x3f0 net/ipv6/ip6_input.c:273 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1092 do_softirq.part.0+0x160/0x1c0 kernel/softirq.c:336 do_softirq kernel/softirq.c:328 [inline] __local_bh_enable_ip+0x20e/0x270 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] ipvlan_process_multicast+0x79c/0xcb0 drivers/net/ipvlan/ipvlan_core.c:284 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 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 ---------------- Code disassembly (best guess): 0: 7b 28 jnp 0x2a 2: 4c 8b 6b 20 mov 0x20(%rbx),%r13 6: 48 89 f8 mov %rdi,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 11: 0f 85 99 00 00 00 jne 0xb0 17: 49 8d 7d 68 lea 0x68(%r13),%rdi 1b: 48 8b 5b 28 mov 0x28(%rbx),%rbx 1f: 48 89 f8 mov %rdi,%rax 22: 48 c1 e8 03 shr $0x3,%rax 26: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) * 2a: 75 73 jne 0x9f <-- trapping instruction 2c: 49 8b 45 68 mov 0x68(%r13),%rax 30: 48 85 c3 test %rax,%rbx 33: 0f 84 33 ff ff ff je 0xffffff6c 39: bf 01 00 00 00 mov $0x1,%edi 3e: e8 .byte 0xe8 3f: 31 .byte 0x31