[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[    8.340527] rsyslogd (2864) used greatest stack depth: 14592 bytes left
[?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-1,10.128.15.226' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   33.435349] ------------[ cut here ]------------
[   33.436177] WARNING: CPU: 1 PID: 2989 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   33.437702] Kernel panic - not syncing: panic_on_warn set ...
[   33.437702] 
[   33.438694] CPU: 1 PID: 2989 Comm: syzkaller205895 Not tainted 4.14.0-rc5-mm1+ #20
[   33.439733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.440969] Call Trace:
[   33.441331]  dump_stack+0x194/0x257
[   33.441823]  ? arch_local_irq_restore+0x53/0x53
[   33.442467]  ? vsnprintf+0x1ed/0x1900
[   33.442985]  panic+0x1e4/0x41c
[   33.443418]  ? refcount_error_report+0x214/0x214
[   33.444062]  ? show_regs_print_info+0x65/0x65
[   33.444672]  ? __warn+0x1a9/0x1e0
[   33.445144]  ? kmalloc_slab+0x5d/0x70
[   33.445653]  __warn+0x1c4/0x1e0
[   33.446097]  ? kmalloc_slab+0x5d/0x70
[   33.446611]  report_bug+0x211/0x2d0
[   33.447108]  fixup_bug+0x40/0x90
[   33.447564]  do_trap+0x260/0x390
[   33.448025]  do_error_trap+0x120/0x390
[   33.448551]  ? do_trap+0x390/0x390
[   33.449029]  ? kmalloc_slab+0x5d/0x70
[   33.449595]  ? ipv6_dev_get_saddr+0x4ec/0x9f0
[   33.450216]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   33.450865]  do_invalid_op+0x1b/0x20
[   33.451413]  invalid_op+0x18/0x20
[   33.451877] RIP: 0010:kmalloc_slab+0x5d/0x70
[   33.452494] RSP: 0018:ffff8801d1cbf4b0 EFLAGS: 00010246
[   33.453204] RAX: 0000000000000000 RBX: ffff8801d1cbf748 RCX: ffffffff843aa363
[   33.454166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   33.455140] RBP: ffff8801d1cbf4b0 R08: ffff8801c1d3c1c0 R09: ffff8801d1cbfb10
[   33.456093] R10: ffff8801d1cbf678 R11: 0000000000000000 R12: ffff8801d1cbfab0
[   33.463328] R13: ffff8801d1cbfb10 R14: 00000000014080c0 R15: ffff8801d8d03880
[   33.470578]  ? ip6_setup_cork+0x173/0x15c0
[   33.474787]  __kmalloc+0x25/0x760
[   33.478210]  ? inet6_dump_ifaddr+0x30/0x30
[   33.482601]  ? ip6_setup_cork+0x1e8/0x15c0
[   33.486809]  ip6_setup_cork+0x1e8/0x15c0
[   33.490846]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   33.496103]  ? ip6_pol_route_output+0x4c/0x60
[   33.500577]  ? ip6_pol_route_input+0x70/0x70
[   33.504963]  ip6_make_skb+0x282/0x530
[   33.508733]  ? ip_reply_glue_bits+0xb0/0xb0
[   33.513025]  ? ip6_push_pending_frames+0xe0/0xe0
[   33.517747]  ? ip6_dst_hoplimit+0x26c/0x420
[   33.522038]  ? lock_downgrade+0x990/0x990
[   33.526163]  ? __lock_is_held+0xb6/0x140
[   33.530202]  ? ip6_dst_hoplimit+0xc1/0x420
[   33.534402]  ? ip6_find_1stfragopt+0x240/0x240
[   33.538959]  udpv6_sendmsg+0x2769/0x3380
[   33.542992]  ? ip_reply_glue_bits+0xb0/0xb0
[   33.547291]  ? udpv6_setsockopt+0x80/0x80
[   33.551407]  ? reacquire_held_locks+0x1fd/0x3d0
[   33.556040]  ? reacquire_held_locks+0x1fd/0x3d0
[   33.560678]  ? find_held_lock+0x35/0x1d0
[   33.564714]  ? release_sock+0x1d4/0x2a0
[   33.568657]  ? lock_downgrade+0x990/0x990
[   33.572771]  ? lock_downgrade+0x990/0x990
[   33.576889]  ? do_raw_spin_trylock+0x190/0x190
[   33.581444]  ? __local_bh_enable_ip+0x9d/0x160
[   33.585993]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   33.590977]  ? release_sock+0x1d4/0x2a0
[   33.594923]  ? _raw_spin_unlock_bh+0x30/0x40
[   33.599299]  ? release_sock+0x1d4/0x2a0
[   33.603251]  ? udp_v6_get_port+0x9c/0xc0
[   33.607284]  inet_sendmsg+0x11f/0x5e0
[   33.611056]  ? inet_sendmsg+0x11f/0x5e0
[   33.614999]  ? __might_sleep+0x95/0x190
[   33.618944]  ? inet_recvmsg+0x5f0/0x5f0
[   33.622890]  ? selinux_socket_sendmsg+0x36/0x40
[   33.627684]  ? security_socket_sendmsg+0x89/0xb0
[   33.632414]  ? inet_recvmsg+0x5f0/0x5f0
[   33.636358]  sock_sendmsg+0xca/0x110
[   33.640042]  SYSC_sendto+0x352/0x5a0
[   33.643727]  ? SYSC_connect+0x470/0x470
[   33.647693]  ? mm_fault_error+0x2c0/0x2c0
[   33.651818]  ? ipv6_setsockopt+0xa8/0x150
[   33.655940]  ? __do_page_fault+0xd60/0xd60
[   33.660155]  ? SyS_recv+0x40/0x40
[   33.663579]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   33.668391]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   33.673375]  SyS_sendto+0x40/0x50
[   33.676800]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   33.681520] RIP: 0033:0x440009
[   33.684678] RSP: 002b:00007ffebff4e7d8 EFLAGS: 00000216 ORIG_RAX: 000000000000002c
[   33.692351] RAX: ffffffffffffffda RBX: 00000000006ccd60 RCX: 0000000000440009
[   33.699586] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000006
[   33.706822] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   33.714067] R10: 0000000000000000 R11: 0000000000000216 R12: 505daaef76b36d7c
[   33.721302] R13: 04a17b4203d90165 R14: 0000000000000000 R15: 0000000000000000
[   33.729009] Dumping ftrace buffer:
[   33.732559]    (ftrace buffer empty)
[   33.736236] Kernel Offset: disabled
[   33.739832] Rebooting in 86400 seconds..