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-386-0,10.128.0.24' (ECDSA) to the list of known hosts. 2017/12/02 07:24:41 parsed 1 programs 2017/12/02 07:24:41 executed programs: 0 syzkaller login: [ 32.746404] device syz0 entered promiscuous mode [ 32.750376] ------------[ cut here ]------------ [ 32.751075] syz0: caps=(0x00000800000058c1, 0x0000000000000000) len=392 data_len=0 gso_size=127 gso_type=3 ip_summed=0 [ 32.752644] WARNING: CPU: 1 PID: 3092 at net/core/dev.c:2600 skb_warn_bad_offload+0x2bd/0x3c0 [ 32.753777] Kernel panic - not syncing: panic_on_warn set ... [ 32.753777] [ 32.754744] CPU: 1 PID: 3092 Comm: syz-executor0 Not tainted 4.15.0-rc1+ #114 [ 32.755708] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.756926] Call Trace: [ 32.757286] dump_stack+0x194/0x257 [ 32.757795] ? arch_local_irq_restore+0x53/0x53 [ 32.758440] ? vsnprintf+0x1ed/0x1900 [ 32.758958] panic+0x1e4/0x41c [ 32.759392] ? refcount_error_report+0x214/0x214 [ 32.760038] ? show_regs_print_info+0x65/0x65 [ 32.760644] ? __warn+0x1c1/0x200 [ 32.761114] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 32.761746] __warn+0x1dc/0x200 [ 32.762192] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 32.762818] report_bug+0x211/0x2d0 [ 32.763317] fixup_bug.part.11+0x37/0x80 [ 32.763863] do_error_trap+0x2d7/0x3e0 [ 32.764390] ? math_error+0x400/0x400 [ 32.764943] ? vprintk_emit+0x3ea/0x590 [ 32.765544] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.766229] do_invalid_op+0x1b/0x20 [ 32.766730] invalid_op+0x18/0x20 [ 32.770150] RIP: 0010:skb_warn_bad_offload+0x2bd/0x3c0 [ 32.775399] RSP: 0018:ffff8801cb89ef60 EFLAGS: 00010286 [ 32.780733] RAX: dffffc0000000008 RBX: ffff8801cc7f0280 RCX: ffffffff8159c48e [ 32.787974] RDX: 0000000000000000 RSI: 1ffff10039713da7 RDI: ffff8801cb89ec68 [ 32.795213] RBP: ffff8801cb89efb8 R08: 1ffff10039713d69 R09: 0000000000000000 [ 32.802451] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 32.809688] R13: ffff8801cc7f0280 R14: ffff8801cbfb15d8 R15: 0000000000000003 [ 32.816955] ? vprintk_func+0x5e/0xc0 [ 32.820767] __skb_gso_segment+0x612/0x800 [ 32.824985] ? skb_mac_gso_segment+0x660/0x660 [ 32.829555] ? lock_downgrade+0x980/0x980 [ 32.833689] ? __skb_flow_get_ports+0x400/0x400 [ 32.838335] validate_xmit_skb+0x4ba/0xb20 [ 32.842554] ? netif_skb_features+0x8e0/0x8e0 [ 32.847028] ? do_raw_spin_trylock+0x190/0x190 [ 32.851600] validate_xmit_skb_list+0xb7/0x120 [ 32.856166] sch_direct_xmit+0x3b6/0x6d0 [ 32.860199] ? dev_deactivate_queue.constprop.27+0x260/0x260 [ 32.865973] __dev_queue_xmit+0x16f4/0x2070 [ 32.870269] ? netdev_pick_tx+0x300/0x300 [ 32.874385] ? lock_release+0xda0/0xda0 [ 32.878332] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 32.884183] ? refcount_add+0x24/0x60 [ 32.887954] ? skb_set_owner_w+0x232/0x330 [ 32.892161] ? __might_sleep+0x95/0x190 [ 32.896102] ? kasan_check_write+0x14/0x20 [ 32.900303] ? copyin+0x91/0xb0 [ 32.903552] ? _copy_from_iter+0x367/0xf30 [ 32.907754] ? __check_object_size+0x25d/0x4f0 [ 32.912314] ? check_stack_object+0x140/0x140 [ 32.916783] ? copy_page_to_iter+0xe10/0xe10 [ 32.921159] ? _copy_from_iter_full+0x22b/0xbb0 [ 32.925802] ? skb_copy_datagram_from_iter+0x3a5/0x5a0 [ 32.931059] ? iov_iter_advance+0x13f0/0x13f0 [ 32.935764] dev_queue_xmit+0x17/0x20 [ 32.939884] packet_sendmsg+0x3ab1/0x6060 [ 32.944003] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 32.949159] ? lock_downgrade+0x980/0x980 [ 32.953274] ? pgtable_trans_huge_deposit+0x342/0x6d0 [ 32.958434] ? pudp_huge_clear_flush+0x1f0/0x1f0 [ 32.963165] ? do_raw_spin_trylock+0xd1/0x190 [ 32.968245] ? packet_cached_dev_get+0x2b0/0x2b0 [ 32.972969] ? hash_futex+0x15/0x210 [ 32.976649] ? drop_futex_key_refs.isra.13+0x63/0xb0 [ 32.981717] ? futex_wake+0x2ca/0x680 [ 32.985492] ? get_futex_key+0x1d50/0x1d50 [ 32.989693] ? __lock_acquire+0x6e9/0x47f0 [ 32.993899] ? find_held_lock+0x39/0x1d0 [ 32.997936] ? lock_downgrade+0x980/0x980 [ 33.002053] ? avc_has_perm+0xd0/0x680 [ 33.005908] ? check_noncircular+0x20/0x20 [ 33.010112] ? sock_has_perm+0x29c/0x400 [ 33.014142] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 33.019477] ? exit_robust_list+0x240/0x240 [ 33.023781] ? security_socket_sendmsg+0x89/0xb0 [ 33.028513] ? packet_cached_dev_get+0x2b0/0x2b0 [ 33.033247] sock_sendmsg+0xca/0x110 [ 33.036947] sock_write_iter+0x320/0x5e0 [ 33.040984] ? sock_sendmsg+0x110/0x110 [ 33.044946] ? iov_iter_init+0xaf/0x1d0 [ 33.048895] __vfs_write+0x68a/0x970 [ 33.052590] ? kernel_read+0x120/0x120 [ 33.056449] ? bpf_fd_pass+0x280/0x280 [ 33.060309] ? _cond_resched+0x14/0x30 [ 33.064167] ? selinux_file_permission+0x82/0x460 [ 33.068989] ? rw_verify_area+0xe5/0x2b0 [ 33.073016] ? __fdget_raw+0x20/0x20 [ 33.076698] vfs_write+0x18f/0x510 [ 33.080209] SyS_write+0xef/0x220 [ 33.083628] ? __do_page_fault+0x3d6/0xc90 [ 33.087831] ? SyS_read+0x220/0x220 [ 33.091428] ? do_fast_syscall_32+0x156/0xf9d [ 33.095896] ? SyS_read+0x220/0x220 [ 33.099489] do_fast_syscall_32+0x3ee/0xf9d [ 33.103782] ? do_int80_syscall_32+0x9d0/0x9d0 [ 33.108330] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.113066] ? lockdep_sys_exit+0x47/0xf0 [ 33.117187] ? syscall_return_slowpath+0x2ad/0x550 [ 33.122094] ? sysret32_from_system_call+0x5/0x3b [ 33.126910] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.131725] entry_SYSENTER_compat+0x51/0x60 [ 33.136100] RIP: 0023:0xf7f95c79 [ 33.139432] RSP: 002b:00000000ffd5cb1c EFLAGS: 00000296 ORIG_RAX: 0000000000000004 [ 33.147107] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000205c2000 [ 33.154350] RDX: 0000000000000192 RSI: 0000000000000000 RDI: 0000000000000000 [ 33.161588] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 33.168832] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.176067] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.183492] Dumping ftrace buffer: [ 33.187036] (ftrace buffer empty) [ 33.190716] Kernel Offset: disabled [ 33.194314] Rebooting in 86400 seconds..