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-386-3,10.128.0.18' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.996326] ------------[ cut here ]------------ [ 41.997096] WARNING: CPU: 0 PID: 2985 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 41.998446] Kernel panic - not syncing: panic_on_warn set ... [ 41.998446] [ 41.999451] CPU: 0 PID: 2985 Comm: syzkaller134698 Not tainted 4.14.0-rc5+ #51 [ 42.000603] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.001820] Call Trace: [ 42.002178] dump_stack+0x194/0x257 [ 42.002670] ? arch_local_irq_restore+0x53/0x53 [ 42.003302] panic+0x1e4/0x417 [ 42.003735] ? __warn+0x1d9/0x1d9 [ 42.004215] ? show_regs_print_info+0x65/0x65 [ 42.004825] ? kmalloc_slab+0x5d/0x70 [ 42.005334] __warn+0x1c4/0x1d9 [ 42.005775] ? kmalloc_slab+0x5d/0x70 [ 42.006289] report_bug+0x211/0x2d0 [ 42.006785] fixup_bug+0x40/0x90 [ 42.007242] do_trap+0x260/0x390 [ 42.007702] do_error_trap+0x120/0x390 [ 42.008228] ? do_trap+0x390/0x390 [ 42.008760] ? kmalloc_slab+0x5d/0x70 [ 42.009286] ? ipv6_dev_get_saddr+0x418/0xa20 [ 42.009888] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.010537] do_invalid_op+0x1b/0x20 [ 42.011038] invalid_op+0x18/0x20 [ 42.011518] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 42.012104] RSP: 0018:ffff8801c0c2f310 EFLAGS: 00010246 [ 42.012812] RAX: 0000000000000000 RBX: ffff8801c0c2f5a8 RCX: 0000000000000007 [ 42.013763] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff [ 42.014717] RBP: ffff8801c0c2f310 R08: ffff8801c1be01c0 R09: ffff8801c0c2f970 [ 42.015706] R10: ffff8801c0c2f4d8 R11: 0000000000000000 R12: ffff8801c0c2f910 [ 42.016658] R13: ffff8801c0c2f970 R14: 00000000014080c0 R15: ffff8801d2911100 [ 42.023914] __kmalloc+0x25/0x760 [ 42.027336] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 42.031971] ? ip6_setup_cork+0x1e8/0x15c0 [ 42.036178] ip6_setup_cork+0x1e8/0x15c0 [ 42.040214] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 42.045458] ? ip6_pol_route_output+0x4c/0x60 [ 42.049922] ? ip6_pol_route_input+0x70/0x70 [ 42.054303] ip6_make_skb+0x282/0x530 [ 42.058077] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.062366] ? ip6_push_pending_frames+0xe0/0xe0 [ 42.067089] ? ip6_dst_hoplimit+0x26c/0x420 [ 42.071378] ? lock_downgrade+0x990/0x990 [ 42.075499] ? __lock_is_held+0xb6/0x140 [ 42.079537] ? ip6_dst_hoplimit+0xc1/0x420 [ 42.083736] ? ip6_find_1stfragopt+0x240/0x240 [ 42.088292] udpv6_sendmsg+0x2769/0x3380 [ 42.092321] ? ip_reply_glue_bits+0xb0/0xb0 [ 42.096621] ? udpv6_setsockopt+0x80/0x80 [ 42.100740] ? reacquire_held_locks+0x1fd/0x3d0 [ 42.105378] ? find_held_lock+0x35/0x1d0 [ 42.109411] ? release_sock+0x1d4/0x2a0 [ 42.113351] ? lock_downgrade+0x990/0x990 [ 42.117469] ? lock_downgrade+0x990/0x990 [ 42.121593] ? __local_bh_enable_ip+0x9d/0x160 [ 42.126141] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.131122] ? release_sock+0x1d4/0x2a0 [ 42.135068] ? _raw_spin_unlock_bh+0x30/0x40 [ 42.139443] ? release_sock+0x1d4/0x2a0 [ 42.143389] ? udp_v6_get_port+0x9c/0xc0 [ 42.147421] inet_sendmsg+0x11f/0x5e0 [ 42.151190] ? inet_sendmsg+0x11f/0x5e0 [ 42.155129] ? __might_sleep+0x95/0x190 [ 42.159071] ? inet_recvmsg+0x5f0/0x5f0 [ 42.163014] ? selinux_socket_sendmsg+0x36/0x40 [ 42.167647] ? security_socket_sendmsg+0x89/0xb0 [ 42.172368] ? inet_recvmsg+0x5f0/0x5f0 [ 42.176312] sock_sendmsg+0xca/0x110 [ 42.179994] SYSC_sendto+0x352/0x5a0 [ 42.183679] ? SYSC_connect+0x470/0x470 [ 42.187628] ? __do_page_fault+0x64c/0xd60 [ 42.191842] ? __handle_mm_fault+0x39c0/0x39c0 [ 42.196390] ? vmacache_find+0x5f/0x280 [ 42.200337] ? up_read+0x1a/0x40 [ 42.203669] ? __do_page_fault+0x3d6/0xd60 [ 42.207877] SyS_sendto+0x40/0x50 [ 42.211297] ? SyS_getpeername+0x30/0x30 [ 42.215324] do_fast_syscall_32+0x3f2/0xf05 [ 42.219616] ? do_int80_syscall_32+0x940/0x940 [ 42.224166] ? kasan_check_read+0x11/0x20 [ 42.228282] ? syscall_return_slowpath+0x510/0x510 [ 42.233180] ? SyS_rt_sigaction+0x94/0x1b0 [ 42.237381] ? SyS_sigprocmask+0x4b0/0x4b0 [ 42.241585] ? SyS_read+0x184/0x220 [ 42.245180] ? retint_user+0x18/0x20 [ 42.248864] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.253679] entry_SYSENTER_compat+0x51/0x60 [ 42.258053] RIP: 0023:0xf7fd9c79 [ 42.261396] RSP: 002b:00000000ff84686c EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 42.269073] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020fd1000 [ 42.276311] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020e0afe4 [ 42.283545] RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000 [ 42.290780] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 42.298015] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 42.305740] Dumping ftrace buffer: [ 42.309284] (ftrace buffer empty) [ 42.312959] Kernel Offset: disabled [ 42.316556] Rebooting in 86400 seconds..