INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-mmots-kasan-gce-0,10.128.0.14' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program syzkaller login: [ 40.397830] syz0: caps=(0x00000400000058c1, 0x0000000000000000) len=159 data_len=0 gso_size=1792 gso_type=3 ip_summed=0 [ 40.408934] ------------[ cut here ]------------ [ 40.413864] WARNING: CPU: 1 PID: 2987 at net/core/dev.c:2585 skb_warn_bad_offload+0x2a9/0x380 [ 40.422510] Kernel panic - not syncing: panic_on_warn set ... [ 40.422510] [ 40.429850] CPU: 1 PID: 2987 Comm: syzkaller483999 Not tainted 4.13.0-mm1+ #7 [ 40.437093] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.446422] Call Trace: [ 40.448989] dump_stack+0x194/0x257 [ 40.452592] ? arch_local_irq_restore+0x53/0x53 [ 40.457367] panic+0x1e4/0x417 [ 40.460539] ? __warn+0x1d9/0x1d9 [ 40.463966] ? show_regs_print_info+0x65/0x65 [ 40.468449] ? skb_warn_bad_offload+0x2a9/0x380 [ 40.473088] __warn+0x1c4/0x1d9 [ 40.476340] ? skb_warn_bad_offload+0x2a9/0x380 [ 40.480992] report_bug+0x211/0x2d0 [ 40.484598] fixup_bug+0x40/0x90 [ 40.487936] do_trap+0x260/0x390 [ 40.491279] do_error_trap+0x120/0x390 [ 40.495142] ? do_trap+0x390/0x390 [ 40.498652] ? skb_warn_bad_offload+0x2a9/0x380 [ 40.503289] ? vprintk_emit+0x3ea/0x590 [ 40.507242] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.512064] do_invalid_op+0x1b/0x20 [ 40.515754] invalid_op+0x18/0x20 [ 40.519179] RIP: 0010:skb_warn_bad_offload+0x2a9/0x380 [ 40.524424] RSP: 0018:ffff8801ce2ef0a0 EFLAGS: 00010282 [ 40.529761] RAX: 000000000000006b RBX: ffff8801cf04b560 RCX: 0000000000000000 [ 40.537005] RDX: 000000000000006b RSI: 1ffff10039c5ddd4 RDI: ffffed0039c5de08 [ 40.544247] RBP: ffff8801ce2ef0f8 R08: ffff8801ce2ee790 R09: 0000000000000000 [ 40.551486] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801ce0b82c0 [ 40.558725] R13: 0000000000000000 R14: ffff8801ce0b82c0 R15: 0000000000000700 [ 40.565993] __skb_gso_segment+0x607/0x7f0 [ 40.570201] ? skb_mac_gso_segment+0x660/0x660 [ 40.574763] validate_xmit_skb+0x4ba/0xb20 [ 40.578970] ? netif_skb_features+0x8e0/0x8e0 [ 40.583443] validate_xmit_skb_list+0xb7/0x120 [ 40.588002] sch_direct_xmit+0x3b6/0x6d0 [ 40.592038] ? dev_deactivate_queue.constprop.27+0x260/0x260 [ 40.597814] __dev_queue_xmit+0x15fe/0x1e40 [ 40.602106] ? __might_fault+0xe0/0x1d0 [ 40.606059] ? netdev_pick_tx+0x300/0x300 [ 40.610179] ? skb_set_owner_w+0x1ff/0x300 [ 40.614392] ? __might_sleep+0x95/0x190 [ 40.618341] ? kasan_check_write+0x14/0x20 [ 40.622547] ? copyin+0x91/0xb0 [ 40.625798] ? _copy_from_iter+0x367/0xf30 [ 40.630004] ? __check_object_size+0x25d/0x4f0 [ 40.634560] ? check_stack_object+0x140/0x140 [ 40.639029] ? copy_page_to_iter+0xd60/0xd60 [ 40.643409] ? _copy_from_iter_full+0x22b/0xbb0 [ 40.648049] ? __dev_get_by_index+0x1a0/0x1a0 [ 40.652525] ? skb_copy_datagram_from_iter+0x3a5/0x5a0 [ 40.657769] ? iov_iter_advance+0x13f0/0x13f0 [ 40.662231] ? sock_cmsg_send+0x1e1/0x260 [ 40.666353] dev_queue_xmit+0x17/0x20 [ 40.670126] packet_sendmsg+0x3bbf/0x6030 [ 40.674246] ? do_raw_spin_trylock+0x190/0x190 [ 40.678803] ? find_held_lock+0x39/0x1d0 [ 40.682857] ? packet_cached_dev_get+0x2b0/0x2b0 [ 40.687582] ? check_noncircular+0x20/0x20 [ 40.691789] ? lock_release+0xd70/0xd70 [ 40.695732] ? check_same_owner+0x320/0x320 [ 40.700023] ? __check_object_size+0x25d/0x4f0 [ 40.704583] ? __might_sleep+0x95/0x190 [ 40.708534] ? find_held_lock+0x39/0x1d0 [ 40.712576] ? lock_downgrade+0x990/0x990 [ 40.716700] ? sock_has_perm+0x29c/0x400 [ 40.720732] ? selinux_tun_dev_create+0xc0/0xc0 [ 40.725381] ? memzero_page+0x2f/0xe0 [ 40.729154] ? lock_release+0xd70/0xd70 [ 40.733131] ? security_socket_sendmsg+0x89/0xb0 [ 40.737860] ? packet_cached_dev_get+0x2b0/0x2b0 [ 40.742591] sock_sendmsg+0xca/0x110 [ 40.746278] ___sys_sendmsg+0x75b/0x8a0 [ 40.750231] ? copy_msghdr_from_user+0x590/0x590 [ 40.754990] ? fget_raw+0x20/0x20 [ 40.758420] ? handle_mm_fault+0x410/0x8d0 [ 40.762628] ? down_read_trylock+0xdb/0x170 [ 40.766919] ? __do_page_fault+0x2b8/0xb60 [ 40.771139] ? __fdget+0x18/0x20 [ 40.774482] __sys_sendmsg+0xe5/0x210 [ 40.778266] ? __sys_sendmsg+0xe5/0x210 [ 40.782213] ? SyS_shutdown+0x290/0x290 [ 40.786160] ? __do_page_fault+0xb60/0xb60 [ 40.790368] ? SyS_setsockopt+0x189/0x360 [ 40.794484] ? SyS_setsockopt+0x215/0x360 [ 40.798617] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.803610] SyS_sendmsg+0x2d/0x50 [ 40.807126] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 40.811851] RIP: 0033:0x445449 [ 40.815010] RSP: 002b:00000000007efe58 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 40.822691] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445449 [ 40.829932] RDX: 0000000020000000 RSI: 0000000020f18000 RDI: 0000000000000004 [ 40.837172] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 40.844409] R10: 0000000000000004 R11: 0000000000000217 R12: 0000000000402aa0 [ 40.851648] R13: 0000000000402b30 R14: 0000000000000000 R15: 0000000000000000 [ 40.859089] Dumping ftrace buffer: [ 40.862664] (ftrace buffer empty) [ 40.866348] Kernel Offset: disabled [ 40.869955] Rebooting in 86400 seconds..