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-386-4,10.128.0.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.236659] ------------[ cut here ]------------ [ 43.241496] WARNING: CPU: 1 PID: 2984 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 43.249555] Kernel panic - not syncing: panic_on_warn set ... [ 43.249555] [ 43.256901] CPU: 1 PID: 2984 Comm: syzkaller588502 Not tainted 4.14.0-rc4+ #40 [ 43.264228] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.273553] Call Trace: [ 43.276118] dump_stack+0x194/0x257 [ 43.279732] ? arch_local_irq_restore+0x53/0x53 [ 43.284390] panic+0x1e4/0x417 [ 43.287556] ? __warn+0x1d9/0x1d9 [ 43.290980] ? show_regs_print_info+0x65/0x65 [ 43.295471] ? kmalloc_slab+0x5d/0x70 [ 43.299242] __warn+0x1c4/0x1d9 [ 43.302493] ? kmalloc_slab+0x5d/0x70 [ 43.306265] report_bug+0x211/0x2d0 [ 43.309870] fixup_bug+0x40/0x90 [ 43.313210] do_trap+0x260/0x390 [ 43.316557] do_error_trap+0x120/0x390 [ 43.320420] ? do_trap+0x390/0x390 [ 43.323932] ? kmalloc_slab+0x5d/0x70 [ 43.327706] ? lock_release+0xd70/0xd70 [ 43.331664] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.336485] do_invalid_op+0x1b/0x20 [ 43.340172] invalid_op+0x18/0x20 [ 43.343594] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 43.347969] RSP: 0018:ffff8801ce0c7310 EFLAGS: 00010246 [ 43.353307] RAX: 0000000000000000 RBX: ffff8801ce0c75a8 RCX: 0000000000000007 [ 43.360550] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff [ 43.367791] RBP: ffff8801ce0c7310 R08: ffff8801d6260000 R09: ffff8801ce0c7970 [ 43.375033] R10: ffff8801ce5763c0 R11: 0000000000000000 R12: ffff8801ce0c7910 [ 43.382276] R13: ffff8801ce0c7970 R14: 00000000014080c0 R15: ffff8801cfedd7c0 [ 43.389542] __kmalloc+0x25/0x760 [ 43.392973] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 43.397614] ? ip6_setup_cork+0x1e8/0x15c0 [ 43.401825] ip6_setup_cork+0x1e8/0x15c0 [ 43.405868] ? __ip6_append_data.isra.43+0x32b0/0x32b0 [ 43.411125] ip6_make_skb+0x282/0x530 [ 43.414902] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.419199] ? ip6_push_pending_frames+0xe0/0xe0 [ 43.423925] ? ip6_dst_hoplimit+0x10d/0x420 [ 43.428218] ? ip6_route_output_flags+0x1f1/0x2b0 [ 43.433041] ? __lock_is_held+0xbc/0x140 [ 43.437084] ? ip6_dst_hoplimit+0xc1/0x420 [ 43.441288] ? ip6_find_1stfragopt+0x240/0x240 [ 43.445849] udpv6_sendmsg+0x2769/0x3380 [ 43.449886] ? ip_reply_glue_bits+0xb0/0xb0 [ 43.454192] ? udpv6_setsockopt+0x80/0x80 [ 43.458333] ? lock_downgrade+0x990/0x990 [ 43.462458] ? lock_downgrade+0x990/0x990 [ 43.466581] ? lock_release+0xd70/0xd70 [ 43.470557] ? __local_bh_enable_ip+0x9d/0x160 [ 43.475116] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.480117] ? release_sock+0x1d4/0x2a0 [ 43.484070] ? _raw_spin_unlock_bh+0x30/0x40 [ 43.488450] ? release_sock+0x1d4/0x2a0 [ 43.492406] ? udp_v6_get_port+0x9c/0xc0 [ 43.496448] inet_sendmsg+0x11f/0x5e0 [ 43.500219] ? inet_sendmsg+0x11f/0x5e0 [ 43.504164] ? __might_sleep+0x95/0x190 [ 43.508110] ? inet_recvmsg+0x5f0/0x5f0 [ 43.512059] ? selinux_socket_sendmsg+0x36/0x40 [ 43.516699] ? security_socket_sendmsg+0x89/0xb0 [ 43.521425] ? inet_recvmsg+0x5f0/0x5f0 [ 43.525375] sock_sendmsg+0xca/0x110 [ 43.529062] SYSC_sendto+0x358/0x5a0 [ 43.532753] ? SYSC_connect+0x480/0x480 [ 43.536727] ? __handle_mm_fault+0x39c0/0x39c0 [ 43.541280] ? vmacache_find+0x5f/0x280 [ 43.545233] ? up_read+0x1a/0x40 [ 43.548573] ? __do_page_fault+0x3d6/0xd60 [ 43.552789] SyS_sendto+0x40/0x50 [ 43.556216] ? SyS_getpeername+0x30/0x30 [ 43.560250] do_fast_syscall_32+0x3f2/0xf05 [ 43.564550] ? do_int80_syscall_32+0x940/0x940 [ 43.569105] ? kasan_check_read+0x11/0x20 [ 43.573224] ? syscall_return_slowpath+0x510/0x510 [ 43.578127] ? SyS_rt_sigaction+0x94/0x1b0 [ 43.582337] ? lockdep_sys_exit+0x47/0xf0 [ 43.586455] ? retint_user+0x18/0x20 [ 43.590145] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.594966] entry_SYSENTER_compat+0x51/0x60 [ 43.599346] RIP: 0023:0xf7f33c79 [ 43.602681] RSP: 002b:00000000ffaeef7c EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 43.610364] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000002052bfcc [ 43.617605] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020e0afe4 [ 43.624847] RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000 [ 43.632089] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 43.639332] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 43.646769] Dumping ftrace buffer: [ 43.650329] (ftrace buffer empty) [ 43.654012] Kernel Offset: disabled [ 43.657621] Rebooting in 86400 seconds..