INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-kasan-gce-386-4,10.128.15.201' (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: [ 41.225386] syz0: caps=(0x00000400000058c1, 0x0000000000000000) len=4203 data_len=2810 gso_size=8465 gso_type=3 ip_summed=0 [ 41.236816] ------------[ cut here ]------------ [ 41.241743] WARNING: CPU: 0 PID: 2983 at net/core/dev.c:2589 skb_warn_bad_offload+0x2a9/0x380 [ 41.250414] Kernel panic - not syncing: panic_on_warn set ... [ 41.250414] [ 41.257748] CPU: 0 PID: 2983 Comm: syzkaller162878 Not tainted 4.14.0-rc2+ #12 [ 41.265074] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.274398] Call Trace: [ 41.276960] dump_stack+0x194/0x257 [ 41.280561] ? arch_local_irq_restore+0x53/0x53 [ 41.285215] panic+0x1e4/0x417 [ 41.288380] ? __warn+0x1d9/0x1d9 [ 41.291803] ? show_regs_print_info+0x65/0x65 [ 41.296283] ? skb_warn_bad_offload+0x2a9/0x380 [ 41.300921] __warn+0x1c4/0x1d9 [ 41.304173] ? skb_warn_bad_offload+0x2a9/0x380 [ 41.308820] report_bug+0x211/0x2d0 [ 41.312428] fixup_bug+0x40/0x90 [ 41.315766] do_trap+0x260/0x390 [ 41.319110] do_error_trap+0x120/0x390 [ 41.322965] ? vprintk_emit+0x49b/0x590 [ 41.326914] ? do_trap+0x390/0x390 [ 41.330430] ? skb_warn_bad_offload+0x2a9/0x380 [ 41.335069] ? vprintk_emit+0x3ea/0x590 [ 41.339040] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.343862] do_invalid_op+0x1b/0x20 [ 41.347545] invalid_op+0x18/0x20 [ 41.350967] RIP: 0010:skb_warn_bad_offload+0x2a9/0x380 [ 41.356212] RSP: 0018:ffff8801ce106ec8 EFLAGS: 00010282 [ 41.361550] RAX: 000000000000006f RBX: ffff8801cdd12da0 RCX: 0000000000000000 [ 41.368789] RDX: 000000000000006f RSI: 1ffff10039c20d99 RDI: ffffed0039c20dcd [ 41.376030] RBP: ffff8801ce106f20 R08: ffff8801ce1065b8 R09: 0000000000000000 [ 41.383269] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801ce1f82c0 [ 41.390511] R13: 0000000000000000 R14: ffff8801ce1f82c0 R15: 0000000000002111 [ 41.397777] ? skb_warn_bad_offload+0x2a9/0x380 [ 41.402436] __skb_gso_segment+0x607/0x7f0 [ 41.406650] ? skb_mac_gso_segment+0x660/0x660 [ 41.411207] ? __alloc_pages_nodemask+0xadb/0xd80 [ 41.416027] validate_xmit_skb+0x4ba/0xb20 [ 41.420238] ? netif_skb_features+0x8e0/0x8e0 [ 41.424716] validate_xmit_skb_list+0xb7/0x120 [ 41.429274] sch_direct_xmit+0x3b6/0x6d0 [ 41.433313] ? dev_deactivate_queue.constprop.27+0x260/0x260 [ 41.439094] __dev_queue_xmit+0x16c6/0x2050 [ 41.443397] ? netdev_pick_tx+0x300/0x300 [ 41.447547] ? __might_fault+0xe0/0x1d0 [ 41.451504] ? check_same_owner+0x320/0x320 [ 41.455798] ? __might_sleep+0x95/0x190 [ 41.459752] ? kasan_check_write+0x14/0x20 [ 41.463957] ? copyin+0x91/0xb0 [ 41.467213] ? copy_page_from_iter+0x510/0x7c0 [ 41.471774] ? _copy_from_iter+0xf30/0xf30 [ 41.475982] ? _copy_from_iter_full+0x22b/0xbb0 [ 41.480623] ? __dev_get_by_index+0x1a0/0x1a0 [ 41.485278] ? skb_copy_datagram_from_iter+0x3a5/0x5a0 [ 41.490538] dev_queue_xmit+0x17/0x20 [ 41.494313] packet_sendmsg+0x3bbd/0x6030 [ 41.498437] ? lru_cache_add+0x1c7/0x3a0 [ 41.502470] ? get_mem_cgroup_from_mm+0x710/0x710 [ 41.507282] ? lru_cache_add_file+0x20/0x20 [ 41.511574] ? __bfs+0x6e0/0x750 [ 41.514914] ? check_noncircular+0x20/0x20 [ 41.519121] ? find_held_lock+0x39/0x1d0 [ 41.523174] ? packet_cached_dev_get+0x2b0/0x2b0 [ 41.527911] ? find_held_lock+0x39/0x1d0 [ 41.531954] ? lock_downgrade+0x990/0x990 [ 41.536083] ? __might_fault+0xe0/0x1d0 [ 41.540037] ? lock_release+0xd70/0xd70 [ 41.543984] ? check_same_owner+0x320/0x320 [ 41.548296] ? sock_has_perm+0x29c/0x400 [ 41.552330] ? __check_object_size+0x25d/0x4f0 [ 41.556886] ? selinux_tun_dev_create+0xc0/0xc0 [ 41.561528] ? __might_sleep+0x95/0x190 [ 41.565483] ? kasan_check_write+0x14/0x20 [ 41.569690] ? _copy_from_user+0x99/0x110 [ 41.573816] ? security_socket_sendmsg+0x89/0xb0 [ 41.578542] ? packet_cached_dev_get+0x2b0/0x2b0 [ 41.583272] sock_sendmsg+0xca/0x110 [ 41.586960] ___sys_sendmsg+0x75b/0x8a0 [ 41.590913] ? copy_msghdr_from_user+0x590/0x590 [ 41.595648] ? __fget+0xbb/0x580 [ 41.598988] ? check_noncircular+0x20/0x20 [ 41.603196] ? __handle_mm_fault+0x587/0x39c0 [ 41.607888] ? __fdget+0x18/0x20 [ 41.611233] __sys_sendmsg+0xe5/0x210 [ 41.615004] ? __sys_sendmsg+0xe5/0x210 [ 41.618952] ? SyS_shutdown+0x290/0x290 [ 41.622907] ? handle_mm_fault+0x410/0x8d0 [ 41.627122] ? down_read_trylock+0xdb/0x170 [ 41.631416] ? __do_page_fault+0x2b8/0xb60 [ 41.635639] compat_SyS_sendmsg+0x2a/0x40 [ 41.639759] ? compat_SyS_getsockopt+0x420/0x420 [ 41.644485] do_fast_syscall_32+0x3f2/0xf05 [ 41.648786] ? do_int80_syscall_32+0x940/0x940 [ 41.653342] ? lockdep_sys_exit+0x47/0xf0 [ 41.657461] ? syscall_return_slowpath+0x2b3/0x510 [ 41.662359] ? finish_task_switch+0x1aa/0x740 [ 41.666827] ? lockdep_sys_exit+0x47/0xf0 [ 41.670949] ? retint_user+0x18/0x20 [ 41.674652] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.679474] entry_SYSENTER_compat+0x51/0x60 [ 41.683853] RIP: 0023:0xf7fcac79 [ 41.687186] RSP: 002b:000000000820fe4c EFLAGS: 00000202 ORIG_RAX: 0000000000000172 [ 41.694878] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000207fcfc8 [ 41.702118] RDX: 0000000000004010 RSI: 0000000000000000 RDI: 0000000000000000 [ 41.709357] RBP: 000000000000cdf3 R08: 0000000000000000 R09: 0000000000000000 [ 41.716596] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 41.723836] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 41.731250] Dumping ftrace buffer: [ 41.734815] (ftrace buffer empty) [ 41.738495] Kernel Offset: disabled [ 41.742099] Rebooting in 86400 seconds..