IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 0 PID: 5416 at lib/refcount.c:187 refcount_sub_and_test+0x167/0x1b0 lib/refcount.c:187 IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 5416 Comm: syz-executor6 Not tainted 4.16.0-rc4+ #345 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready panic+0x1e4/0x41c kernel/panic.c:183 IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:refcount_sub_and_test+0x167/0x1b0 lib/refcount.c:187 RSP: 0018:ffff8801b472e490 EFLAGS: 00010282 RAX: dffffc0000000008 RBX: 0000000000000401 RCX: ffffffff815abb5e RDX: 0000000000000000 RSI: 1ffff100368e5c42 RDI: 1ffff100368e5c17 IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready RBP: ffff8801b472e520 R08: 1ffff100368e5bd9 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff100368e5c93 R13: 00000000ffffff01 R14: 0000000000000500 R15: ffff8801b4e619fc IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready sock_wfree+0xa6/0x140 net/core/sock.c:1819 IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready sctp_wfree+0x2eb/0x670 net/sctp/socket.c:8065 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready skb_release_head_state+0x124/0x260 net/core/skbuff.c:612 skb_release_all+0x15/0x60 net/core/skbuff.c:625 __kfree_skb net/core/skbuff.c:641 [inline] consume_skb+0x153/0x490 net/core/skbuff.c:701 IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready sctp_chunk_destroy net/sctp/sm_make_chunk.c:1450 [inline] sctp_chunk_put+0x29c/0x420 net/sctp/sm_make_chunk.c:1477 sctp_chunk_free+0x53/0x60 net/sctp/sm_make_chunk.c:1464 __sctp_outq_teardown+0x244/0x1230 net/sctp/outqueue.c:234 IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready sctp_outq_free+0x15/0x20 net/sctp/outqueue.c:291 sctp_association_free+0x2d0/0x930 net/sctp/associola.c:356 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:939 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1343 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1210 [inline] sctp_do_sm+0x32e3/0x6ed0 net/sctp/sm_sideeffect.c:1181 IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready sctp_primitive_ABORT+0xa0/0xd0 net/sctp/primitive.c:119 sctp_close+0x266/0x9a0 net/sctp/socket.c:1539 IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready inet_release+0xed/0x1c0 net/ipv4/af_inet.c:427 sock_release+0x8d/0x1e0 net/socket.c:595 sock_close+0x16/0x20 net/socket.c:1149 __fput+0x327/0x7e0 fs/file_table.c:209 IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready ____fput+0x15/0x20 fs/file_table.c:243 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready task_work_run+0x199/0x270 kernel/task_work.c:113 IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x9bb/0x1ad0 kernel/exit.c:865 IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready do_group_exit+0x149/0x400 kernel/exit.c:968 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready get_signal+0x73a/0x16d0 kernel/signal.c:2469 do_signal+0x90/0x1e90 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0x258/0x2f0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:265 [inline] do_syscall_64+0x6ec/0x940 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453e69 RSP: 002b:00007f3c70044ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000072bec8 RCX: 0000000000453e69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8 RBP: 000000000072bec8 R08: 0000000000000000 R09: 000000000072bea0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000a3e8ef R14: 00007f3c700459c0 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..