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-mmots-kasan-gce-0,10.128.0.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 18.300200] device syz0 entered promiscuous mode [ 18.304506] ------------[ cut here ]------------ [ 18.305241] syz0: caps=(0x00000800000058c1, 0x0000000000000000) len=392 data_len=0 gso_size=127 gso_type=3 ip_summed=0 [ 18.306992] WARNING: CPU: 1 PID: 3078 at net/core/dev.c:2600 skb_warn_bad_offload+0x2bd/0x3c0 [ 18.308164] Kernel panic - not syncing: panic_on_warn set ... [ 18.308164] [ 18.309286] CPU: 1 PID: 3078 Comm: syzkaller025504 Not tainted 4.15.0-rc1-mm1+ #29 [ 18.310308] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.311556] Call Trace: [ 18.311933] dump_stack+0x194/0x257 [ 18.312444] ? arch_local_irq_restore+0x53/0x53 [ 18.313105] ? vsnprintf+0x1ed/0x1900 [ 18.313697] panic+0x1e4/0x41c [ 18.314167] ? refcount_error_report+0x214/0x214 [ 18.314819] ? show_regs_print_info+0x65/0x65 [ 18.315466] ? __warn+0x1c1/0x200 [ 18.315961] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 18.316598] __warn+0x1dc/0x200 [ 18.317078] ? console_unlock+0x971/0xd70 [ 18.317679] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 18.318337] report_bug+0x211/0x2d0 [ 18.318854] fixup_bug.part.11+0x37/0x80 [ 18.319430] do_error_trap+0x2d7/0x3e0 [ 18.319986] ? __down_trylock_console_sem+0x10d/0x1e0 [ 18.320695] ? math_error+0x400/0x400 [ 18.324483] ? vprintk_emit+0x3ea/0x590 [ 18.328461] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 18.333298] do_invalid_op+0x1b/0x20 [ 18.336996] invalid_op+0x22/0x40 [ 18.340431] RIP: 0010:skb_warn_bad_offload+0x2bd/0x3c0 [ 18.345686] RSP: 0018:ffff8801cc1df0f8 EFLAGS: 00010286 [ 18.351031] RAX: dffffc0000000008 RBX: ffff8801cc2e0280 RCX: ffffffff815a035e [ 18.358281] RDX: 0000000000000000 RSI: 1ffff1003983bdda RDI: ffff8801cc1dee00 [ 18.365532] RBP: ffff8801cc1df150 R08: 1ffff1003983bd9c R09: 0000000000000000 [ 18.372782] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 18.380032] R13: ffff8801cc2e0280 R14: ffff8801cb803a98 R15: 0000000000000003 [ 18.387307] ? vprintk_func+0x5e/0xc0 [ 18.391094] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 18.395756] __skb_gso_segment+0x612/0x800 [ 18.399971] ? skb_mac_gso_segment+0x660/0x660 [ 18.404535] ? lock_downgrade+0x980/0x980 [ 18.408664] validate_xmit_skb+0x4ba/0xb20 [ 18.412874] ? netif_skb_features+0x8e0/0x8e0 [ 18.417340] ? do_raw_spin_trylock+0x190/0x190 [ 18.421895] validate_xmit_skb_list+0xb7/0x120 [ 18.426448] sch_direct_xmit+0x3b6/0x6d0 [ 18.430489] ? dev_deactivate_queue.constprop.27+0x260/0x260 [ 18.436269] __dev_queue_xmit+0x16f4/0x2070 [ 18.440583] ? netdev_pick_tx+0x300/0x300 [ 18.444711] ? lock_release+0xda0/0xda0 [ 18.448662] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 18.454529] ? refcount_add+0x24/0x60 [ 18.458301] ? skb_set_owner_w+0x232/0x330 [ 18.462518] ? __might_sleep+0x95/0x190 [ 18.466469] ? kasan_check_write+0x14/0x20 [ 18.470672] ? copyin+0x91/0xb0 [ 18.473925] ? _copy_from_iter+0x367/0xf30 [ 18.478128] ? __check_object_size+0x25d/0x4f0 [ 18.482681] ? check_stack_object+0x140/0x140 [ 18.487148] ? copy_page_to_iter+0xe10/0xe10 [ 18.491528] ? _copy_from_iter_full+0x22b/0xbb0 [ 18.496176] ? skb_copy_datagram_from_iter+0x3a5/0x5a0 [ 18.501427] ? iov_iter_advance+0x13f0/0x13f0 [ 18.505890] ? _cond_resched+0x14/0x30 [ 18.509747] ? clear_huge_page+0x309/0x730 [ 18.513954] dev_queue_xmit+0x17/0x20 [ 18.517721] packet_sendmsg+0x3ab1/0x6060 [ 18.521841] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 18.527000] ? __thp_get_unmapped_area+0x130/0x130 [ 18.531903] ? __lock_acquire+0x6e9/0x47f0 [ 18.536116] ? __lock_acquire+0x6e9/0x47f0 [ 18.540325] ? print_usage_bug+0x3f0/0x3f0 [ 18.544545] ? packet_cached_dev_get+0x2b0/0x2b0 [ 18.549279] ? check_noncircular+0x20/0x20 [ 18.553484] ? check_noncircular+0x20/0x20 [ 18.557694] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 18.562859] ? find_held_lock+0x39/0x1d0 [ 18.566900] ? lock_downgrade+0x980/0x980 [ 18.571031] ? avc_has_perm+0xd0/0x680 [ 18.574892] ? check_noncircular+0x20/0x20 [ 18.579100] ? sock_has_perm+0x29c/0x400 [ 18.583146] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 18.588485] ? find_held_lock+0x39/0x1d0 [ 18.592533] ? security_socket_sendmsg+0x89/0xb0 [ 18.597261] ? packet_cached_dev_get+0x2b0/0x2b0 [ 18.601990] sock_sendmsg+0xca/0x110 [ 18.605676] sock_write_iter+0x320/0x5e0 [ 18.609708] ? sock_sendmsg+0x110/0x110 [ 18.613662] ? iov_iter_init+0xaf/0x1d0 [ 18.617611] __vfs_write+0x68a/0x970 [ 18.621295] ? kernel_read+0x120/0x120 [ 18.625149] ? bpf_fd_pass+0x280/0x280 [ 18.629016] ? _cond_resched+0x14/0x30 [ 18.632884] ? selinux_file_permission+0x82/0x460 [ 18.637709] ? rw_verify_area+0xe5/0x2b0 [ 18.641736] ? __fdget_raw+0x20/0x20 [ 18.645420] vfs_write+0x18f/0x510 [ 18.648932] SyS_write+0xef/0x220 [ 18.652351] ? lockdep_sys_exit+0x47/0xf0 [ 18.656466] ? SyS_read+0x220/0x220 [ 18.660058] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 18.665043] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 18.669774] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 18.674502] RIP: 0033:0x444529 [ 18.677666] RSP: 002b:00007ffd4af2a7b8 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 18.685341] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444529 [ 18.692580] RDX: 0000000000000192 RSI: 00000000205c2000 RDI: 0000000000000005 [ 18.699817] RBP: 00000000006cf018 R08: 00007ffd4af2a938 R09: 00007ffd000005b8 [ 18.707055] R10: 000000000000000f R11: 0000000000000293 R12: 0000000000402210 [ 18.714291] R13: 00000000004022a0 R14: 0000000000000000 R15: 0000000000000000 [ 18.722116] Dumping ftrace buffer: [ 18.725681] (ftrace buffer empty) [ 18.729356] Kernel Offset: disabled [ 18.732952] Rebooting in 86400 seconds..