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-386-0,10.128.15.202' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.195895] ------------[ cut here ]------------ [ 31.200846] WARNING: CPU: 1 PID: 2985 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 31.209107] Kernel panic - not syncing: panic_on_warn set ... [ 31.209107] [ 31.216472] CPU: 1 PID: 2985 Comm: syzkaller624367 Not tainted 4.14.0-rc4+ #41 [ 31.223806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.233141] Call Trace: [ 31.235712] dump_stack+0x194/0x257 [ 31.239317] ? arch_local_irq_restore+0x53/0x53 [ 31.243979] panic+0x1e4/0x417 [ 31.247147] ? __warn+0x1d9/0x1d9 [ 31.250574] ? show_regs_print_info+0x65/0x65 [ 31.255057] ? kmalloc_slab+0x5d/0x70 [ 31.258833] __warn+0x1c4/0x1d9 [ 31.262086] ? kmalloc_slab+0x5d/0x70 [ 31.265865] report_bug+0x211/0x2d0 [ 31.269472] fixup_bug+0x40/0x90 [ 31.272816] do_trap+0x260/0x390 [ 31.276163] do_error_trap+0x120/0x390 [ 31.280028] ? do_trap+0x390/0x390 [ 31.283545] ? kmalloc_slab+0x5d/0x70 [ 31.287320] ? lock_release+0xd70/0xd70 [ 31.291276] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.296098] do_invalid_op+0x1b/0x20 [ 31.299786] invalid_op+0x18/0x20 [ 31.303212] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 31.307593] RSP: 0018:ffff8801ce0af310 EFLAGS: 00010246 [ 31.312935] RAX: 0000000000000000 RBX: ffff8801ce0af5a8 RCX: 0000000000000007 [ 31.320178] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff [ 31.327425] RBP: ffff8801ce0af310 R08: ffff8801d74c3700 R09: ffff8801ce0af970 [ 31.334668] R10: ffff8801ce7c6500 R11: 0000000000000000 R12: ffff8801ce0af910 [ 31.341910] R13: ffff8801ce0af970 R14: 00000000014080c0 R15: ffff8801cf1367c0 [ 31.349180] __kmalloc+0x25/0x760 [ 31.352617] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 31.357258] ? ip6_setup_cork+0x1e8/0x15c0 [ 31.361470] ip6_setup_cork+0x1e8/0x15c0 [ 31.365513] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 31.370774] ip6_make_skb+0x282/0x530 [ 31.374555] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.378853] ? ip6_push_pending_frames+0xe0/0xe0 [ 31.383582] ? ip6_dst_hoplimit+0x10d/0x420 [ 31.387876] ? ip6_route_output_flags+0x1f1/0x2b0 [ 31.392702] ? __lock_is_held+0xbc/0x140 [ 31.396747] ? ip6_dst_hoplimit+0xc1/0x420 [ 31.400955] ? ip6_find_1stfragopt+0x240/0x240 [ 31.405517] udpv6_sendmsg+0x2769/0x3380 [ 31.409551] ? ip_reply_glue_bits+0xb0/0xb0 [ 31.413856] ? udpv6_setsockopt+0x80/0x80 [ 31.417987] ? lock_downgrade+0x990/0x990 [ 31.422114] ? lock_downgrade+0x990/0x990 [ 31.426239] ? lock_release+0xd70/0xd70 [ 31.430204] ? __local_bh_enable_ip+0x9d/0x160 [ 31.434769] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.439758] ? release_sock+0x1d4/0x2a0 [ 31.443718] ? _raw_spin_unlock_bh+0x30/0x40 [ 31.448097] ? release_sock+0x1d4/0x2a0 [ 31.452054] ? udp_v6_get_port+0x9c/0xc0 [ 31.456093] inet_sendmsg+0x11f/0x5e0 [ 31.459863] ? inet_sendmsg+0x11f/0x5e0 [ 31.463808] ? __might_sleep+0x95/0x190 [ 31.467754] ? inet_recvmsg+0x5f0/0x5f0 [ 31.471705] ? selinux_socket_sendmsg+0x36/0x40 [ 31.476346] ? security_socket_sendmsg+0x89/0xb0 [ 31.481083] ? inet_recvmsg+0x5f0/0x5f0 [ 31.485032] sock_sendmsg+0xca/0x110 [ 31.488720] SYSC_sendto+0x358/0x5a0 [ 31.492412] ? SYSC_connect+0x480/0x480 [ 31.496390] ? __handle_mm_fault+0x39c0/0x39c0 [ 31.500943] ? vmacache_find+0x5f/0x280 [ 31.504898] ? up_read+0x1a/0x40 [ 31.508241] ? __do_page_fault+0x3d6/0xd60 [ 31.512456] SyS_sendto+0x40/0x50 [ 31.515884] ? SyS_getpeername+0x30/0x30 [ 31.519920] do_fast_syscall_32+0x3f2/0xf05 [ 31.524219] ? do_int80_syscall_32+0x940/0x940 [ 31.528775] ? kasan_check_read+0x11/0x20 [ 31.532895] ? syscall_return_slowpath+0x510/0x510 [ 31.537799] ? SyS_rt_sigaction+0x94/0x1b0 [ 31.542008] ? lockdep_sys_exit+0x47/0xf0 [ 31.546128] ? retint_user+0x18/0x20 [ 31.549820] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.554643] entry_SYSENTER_compat+0x51/0x60 [ 31.559020] RIP: 0023:0xf7f9ec79 [ 31.562356] RSP: 002b:00000000ffc27e9c EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 31.570047] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000002052bfcc [ 31.577288] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020e0afe4 [ 31.584529] RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000 [ 31.591772] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.599015] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.606455] Dumping ftrace buffer: [ 31.610037] (ftrace buffer empty) [ 31.613723] Kernel Offset: disabled [ 31.617331] Rebooting in 86400 seconds..