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-2,10.128.0.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.654807] ------------[ cut here ]------------ [ 43.659612] WARNING: CPU: 1 PID: 2983 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 43.667617] Kernel panic - not syncing: panic_on_warn set ... [ 43.667617] [ 43.674952] CPU: 1 PID: 2983 Comm: syzkaller752765 Not tainted 4.14.0-rc4+ #130 [ 43.682369] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.691691] Call Trace: [ 43.694252] dump_stack+0x194/0x257 [ 43.697852] ? arch_local_irq_restore+0x53/0x53 [ 43.702505] panic+0x1e4/0x417 [ 43.705668] ? __warn+0x1d9/0x1d9 [ 43.709090] ? show_regs_print_info+0x65/0x65 [ 43.713572] ? kmalloc_slab+0x5d/0x70 [ 43.717341] __warn+0x1c4/0x1d9 [ 43.720592] ? kmalloc_slab+0x5d/0x70 [ 43.724369] report_bug+0x211/0x2d0 [ 43.728148] fixup_bug+0x40/0x90 [ 43.731487] do_trap+0x260/0x390 [ 43.734829] do_error_trap+0x120/0x390 [ 43.738690] ? do_trap+0x390/0x390 [ 43.742205] ? kmalloc_slab+0x5d/0x70 [ 43.745978] ? lock_release+0xd70/0xd70 [ 43.749930] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.754748] do_invalid_op+0x1b/0x20 [ 43.758434] invalid_op+0x18/0x20 [ 43.761855] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 43.766232] RSP: 0018:ffff8801bfbc74b0 EFLAGS: 00010246 [ 43.771569] RAX: 0000000000000000 RBX: ffff8801bfbc7748 RCX: 0000000000000007 [ 43.778810] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 43.786051] RBP: ffff8801bfbc74b0 R08: ffff8801d0fbba80 R09: ffff8801bfbc7b10 [ 43.793291] R10: ffff8801ce9dc180 R11: 0000000000000000 R12: ffff8801bfbc7ab0 [ 43.800531] R13: ffff8801bfbc7b10 R14: 00000000014080c0 R15: ffff8801ce9b67c0 [ 43.807796] __kmalloc+0x25/0x760 [ 43.811228] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 43.815870] ? ip6_setup_cork+0x1e8/0x15c0 [ 43.820077] ip6_setup_cork+0x1e8/0x15c0 [ 43.824118] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 43.829373] ip6_make_skb+0x282/0x530 [ 43.833145] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.837441] ? ip6_push_pending_frames+0xe0/0xe0 [ 43.842165] ? ip6_dst_hoplimit+0x10d/0x420 [ 43.846456] ? ip6_route_output_flags+0x1f1/0x2b0 [ 43.851283] ? __lock_is_held+0xbc/0x140 [ 43.855325] ? ip6_dst_hoplimit+0xc1/0x420 [ 43.859531] ? ip6_find_1stfragopt+0x240/0x240 [ 43.864089] udpv6_sendmsg+0x2769/0x3380 [ 43.868121] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.872427] ? udpv6_setsockopt+0x80/0x80 [ 43.876543] ? find_held_lock+0x39/0x1d0 [ 43.880584] ? lock_downgrade+0x990/0x990 [ 43.884701] ? lock_downgrade+0x990/0x990 [ 43.888821] ? lock_release+0xd70/0xd70 [ 43.892776] ? do_raw_spin_trylock+0x190/0x190 [ 43.897334] ? __local_bh_enable_ip+0x9d/0x160 [ 43.901888] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.906874] ? release_sock+0x1d4/0x2a0 [ 43.910823] ? _raw_spin_unlock_bh+0x30/0x40 [ 43.915203] ? release_sock+0x1d4/0x2a0 [ 43.919155] ? udp_v6_get_port+0x9c/0xc0 [ 43.923194] inet_sendmsg+0x11f/0x5e0 [ 43.926962] ? inet_sendmsg+0x11f/0x5e0 [ 43.930907] ? __might_sleep+0x95/0x190 [ 43.934853] ? inet_recvmsg+0x5f0/0x5f0 [ 43.938801] ? selinux_socket_sendmsg+0x36/0x40 [ 43.943440] ? security_socket_sendmsg+0x89/0xb0 [ 43.948165] ? inet_recvmsg+0x5f0/0x5f0 [ 43.952111] sock_sendmsg+0xca/0x110 [ 43.955803] SYSC_sendto+0x358/0x5a0 [ 43.959492] ? SYSC_connect+0x480/0x480 [ 43.963451] ? mm_fault_error+0x2c0/0x2c0 [ 43.967576] ? ipv6_setsockopt+0xa8/0x150 [ 43.971704] ? __do_page_fault+0xd60/0xd60 [ 43.975921] ? lockdep_sys_exit+0x47/0xf0 [ 43.980040] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 43.984856] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.989846] SyS_sendto+0x40/0x50 [ 43.993276] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 43.997999] RIP: 0033:0x43fea9 [ 44.001158] RSP: 002b:00007fff5b1a0eb8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 44.008839] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 44.016078] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 44.023316] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 44.030554] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165 [ 44.037791] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 44.045505] Dumping ftrace buffer: [ 44.049052] (ftrace buffer empty) [ 44.052732] Kernel Offset: disabled [ 44.056335] Rebooting in 86400 seconds..