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 ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 0 PID: 5456 at lib/refcount.c:187 refcount_sub_and_test+0x167/0x1b0 lib/refcount.c:187 IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 5456 Comm: syz-executor3 Not tainted 4.16.0-rc2+ #238 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 8021q: adding VLAN 0 to HW filter on device bond0 panic+0x1e4/0x41c kernel/panic.c:183 IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready 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_CHANGE): veth0: link becomes ready do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x58/0x80 arch/x86/entry/entry_64.S:957 RIP: 0010:refcount_sub_and_test+0x167/0x1b0 lib/refcount.c:187 RSP: 0018:ffff8801caac6440 EFLAGS: 00010282 RAX: dffffc0000000008 RBX: 0000000000000201 RCX: ffffffff815abe7e RDX: 0000000000000000 RSI: 1ffff10039558c38 RDI: 1ffff10039558c0d RBP: ffff8801caac64d0 R08: 1ffff10039558bcf R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10039558c89 R13: 00000000ffffff01 R14: 0000000000000300 R15: ffff8801d313833c sock_wfree+0xa6/0x140 net/core/sock.c:1819 IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready sctp_wfree+0x2eb/0x670 net/sctp/socket.c:8065 IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 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_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1: 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 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready sctp_chunk_free+0x53/0x60 net/sctp/sm_make_chunk.c:1464 IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready __sctp_outq_teardown+0x244/0x1230 net/sctp/outqueue.c:234 IPv6: veth1: IPv6 duplicate address fe80::1:b used by aa:aa:aa:aa:01:0b detected! IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: veth0: IPv6 duplicate address fe80::a used by aa:aa:aa:aa:00:0a detected! 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_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): 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): veth1: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: veth0: IPv6 duplicate address fe80::6:10 used by aa:aa:aa:aa:06:10 detected! inet_release+0xed/0x1c0 net/ipv4/af_inet.c:427 sock_release+0x8d/0x1e0 net/socket.c:595 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready sock_close+0x16/0x20 net/socket.c:1149 __fput+0x327/0x7e0 fs/file_table.c:209 IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x199/0x270 kernel/task_work.c:113 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x9bb/0x1ad0 kernel/exit.c:865 IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: veth1: IPv6 duplicate address fe80::a8aa:aaff:feaa:610 used by aa:aa:aa:aa:06:10 detected! IPv6: veth0: IPv6 duplicate address fe80::a8aa:aaff:feaa:50f used by aa:aa:aa:aa:05:0f detected! do_group_exit+0x149/0x400 kernel/exit.c:968 IPv6: veth1: IPv6 duplicate address fe80::a8aa:aaff:feaa:10b used by aa:aa:aa:aa:01:0b detected! IPv6: veth0: IPv6 duplicate address fe80::a8aa:aaff:feaa:a used by aa:aa:aa:aa:00:0a detected! get_signal+0x73a/0x16d0 kernel/signal.c:2469 IPv6: veth0: IPv6 duplicate address fe80::a8aa:aaff:feaa:711 used by aa:aa:aa:aa:07:11 detected! IPv6: veth0: IPv6 duplicate address fe80::5:f used by aa:aa:aa:aa:05:0f detected! 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_32_irqs_on arch/x86/entry/common.c:336 [inline] do_fast_syscall_32+0xbe6/0xf9f arch/x86/entry/common.c:392 IPv6: veth1: IPv6 duplicate address fe80::a8aa:aaff:feaa:20c used by aa:aa:aa:aa:02:0c detected! entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fb1c99 RSP: 002b:00000000f7f6b10c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0 RAX: fffffffffffffe00 RBX: 000000000813b014 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..