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-386-1,10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.089533] ------------[ cut here ]------------ [ 57.094352] WARNING: CPU: 1 PID: 2983 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 57.102386] Kernel panic - not syncing: panic_on_warn set ... [ 57.102386] [ 57.109727] CPU: 1 PID: 2983 Comm: syzkaller958719 Not tainted 4.14.0-rc4+ #41 [ 57.117063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.126392] Call Trace: [ 57.128956] dump_stack+0x194/0x257 [ 57.132564] ? arch_local_irq_restore+0x53/0x53 [ 57.137225] panic+0x1e4/0x417 [ 57.140392] ? __warn+0x1d9/0x1d9 [ 57.143815] ? show_regs_print_info+0x65/0x65 [ 57.148299] ? kmalloc_slab+0x5d/0x70 [ 57.152075] __warn+0x1c4/0x1d9 [ 57.155327] ? kmalloc_slab+0x5d/0x70 [ 57.159120] report_bug+0x211/0x2d0 [ 57.162724] fixup_bug+0x40/0x90 [ 57.166064] do_trap+0x260/0x390 [ 57.169409] do_error_trap+0x120/0x390 [ 57.173274] ? do_trap+0x390/0x390 [ 57.176788] ? kmalloc_slab+0x5d/0x70 [ 57.180561] ? lock_release+0xd70/0xd70 [ 57.184519] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.189341] do_invalid_op+0x1b/0x20 [ 57.193029] invalid_op+0x18/0x20 [ 57.196452] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 57.200830] RSP: 0018:ffff8801ce6f7310 EFLAGS: 00010246 [ 57.206167] RAX: 0000000000000000 RBX: ffff8801ce6f75a8 RCX: 0000000000000007 [ 57.213408] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff [ 57.220652] RBP: ffff8801ce6f7310 R08: ffff8801d7ef5540 R09: ffff8801ce6f7970 [ 57.227895] R10: ffff8801ceac4180 R11: 0000000000000000 R12: ffff8801ce6f7910 [ 57.235138] R13: ffff8801ce6f7970 R14: 00000000014080c0 R15: ffff8801ce9677c0 [ 57.242405] __kmalloc+0x25/0x760 [ 57.245845] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 57.250485] ? ip6_setup_cork+0x1e8/0x15c0 [ 57.254697] ip6_setup_cork+0x1e8/0x15c0 [ 57.258739] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 57.263999] ip6_make_skb+0x282/0x530 [ 57.267774] ? ip_reply_glue_bits+0xb0/0xb0 [ 57.272078] ? ip6_push_pending_frames+0xe0/0xe0 [ 57.276805] ? ip6_dst_hoplimit+0x10d/0x420 [ 57.281098] ? ip6_route_output_flags+0x1f1/0x2b0 [ 57.285924] ? __lock_is_held+0xbc/0x140 [ 57.289973] ? ip6_dst_hoplimit+0xc1/0x420 [ 57.294185] ? ip6_find_1stfragopt+0x240/0x240 [ 57.298750] udpv6_sendmsg+0x2769/0x3380 [ 57.302791] ? ip_reply_glue_bits+0xb0/0xb0 [ 57.307102] ? udpv6_setsockopt+0x80/0x80 [ 57.311237] ? lock_downgrade+0x990/0x990 [ 57.315357] ? lock_downgrade+0x990/0x990 [ 57.319477] ? lock_release+0xd70/0xd70 [ 57.323446] ? __local_bh_enable_ip+0x9d/0x160 [ 57.328003] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 57.332994] ? release_sock+0x1d4/0x2a0 [ 57.336948] ? _raw_spin_unlock_bh+0x30/0x40 [ 57.341329] ? release_sock+0x1d4/0x2a0 [ 57.345288] ? udp_v6_get_port+0x9c/0xc0 [ 57.349328] inet_sendmsg+0x11f/0x5e0 [ 57.353104] ? inet_sendmsg+0x11f/0x5e0 [ 57.357054] ? __might_sleep+0x95/0x190 [ 57.361001] ? inet_recvmsg+0x5f0/0x5f0 [ 57.364952] ? selinux_socket_sendmsg+0x36/0x40 [ 57.369597] ? security_socket_sendmsg+0x89/0xb0 [ 57.374327] ? inet_recvmsg+0x5f0/0x5f0 [ 57.378277] sock_sendmsg+0xca/0x110 [ 57.381964] SYSC_sendto+0x358/0x5a0 [ 57.385652] ? SYSC_connect+0x480/0x480 [ 57.389627] ? __handle_mm_fault+0x39c0/0x39c0 [ 57.394181] ? vmacache_find+0x5f/0x280 [ 57.398133] ? up_read+0x1a/0x40 [ 57.401470] ? __do_page_fault+0x3d6/0xd60 [ 57.405688] SyS_sendto+0x40/0x50 [ 57.409114] ? SyS_getpeername+0x30/0x30 [ 57.413147] do_fast_syscall_32+0x3f2/0xf05 [ 57.417448] ? do_int80_syscall_32+0x940/0x940 [ 57.422003] ? kasan_check_read+0x11/0x20 [ 57.426124] ? syscall_return_slowpath+0x510/0x510 [ 57.431026] ? SyS_rt_sigaction+0x94/0x1b0 [ 57.435239] ? lockdep_sys_exit+0x47/0xf0 [ 57.439360] ? retint_user+0x18/0x20 [ 57.443055] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.447878] entry_SYSENTER_compat+0x51/0x60 [ 57.452258] RIP: 0023:0xf7f0dc79 [ 57.455594] RSP: 002b:00000000ff8f873c EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 57.464174] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000002052bfcc [ 57.471432] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020e0afe4 [ 57.478673] RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000 [ 57.485922] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 57.493170] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 57.500601] Dumping ftrace buffer: [ 57.504173] (ftrace buffer empty) [ 57.507858] Kernel Offset: disabled [ 57.511464] Rebooting in 86400 seconds..