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-next-kasan-gce-6,10.128.0.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.368386] ------------[ cut here ]------------ [ 42.369184] WARNING: CPU: 0 PID: 2986 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390 [ 42.370530] Kernel panic - not syncing: panic_on_warn set ... [ 42.370530] [ 42.371514] CPU: 0 PID: 2986 Comm: syzkaller411694 Not tainted 4.14.0-rc5-next-20171018+ #36 [ 42.372633] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.373854] Call Trace: [ 42.374216] dump_stack+0x194/0x257 [ 42.374709] ? arch_local_irq_restore+0x53/0x53 [ 42.375370] ? vsnprintf+0x1ed/0x1900 [ 42.375901] panic+0x1e4/0x41c [ 42.376336] ? refcount_error_report+0x214/0x214 [ 42.376971] ? show_regs_print_info+0x65/0x65 [ 42.377578] ? __warn+0x1a9/0x1e0 [ 42.378048] ? strp_data_ready+0x2b7/0x390 [ 42.378614] __warn+0x1c4/0x1e0 [ 42.379057] ? strp_data_ready+0x2b7/0x390 [ 42.379642] report_bug+0x211/0x2d0 [ 42.380137] fixup_bug+0x40/0x90 [ 42.380606] do_trap+0x260/0x390 [ 42.381072] do_error_trap+0x120/0x390 [ 42.381842] ? sk_filter_trim_cap+0x3f3/0x9b0 [ 42.382445] ? do_trap+0x390/0x390 [ 42.382957] ? strp_data_ready+0x2b7/0x390 [ 42.383535] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.384187] do_invalid_op+0x1b/0x20 [ 42.384700] invalid_op+0x18/0x20 [ 42.385176] RIP: 0010:strp_data_ready+0x2b7/0x390 [ 42.385828] RSP: 0018:ffff8801d25477d8 EFLAGS: 00010293 [ 42.386542] RAX: ffff8801d27161c0 RBX: ffff8801d0f55c48 RCX: ffffffff847af437 [ 42.387520] RDX: 0000000000000000 RSI: ffff8801d23a6920 RDI: ffffffff85cc4be0 [ 42.388473] RBP: ffff8801d25477f8 R08: 0000000000000002 R09: 1ffffffff0cddfbe [ 42.395604] R10: ffff8801d25476c0 R11: 1ffff1003a4e2e93 R12: ffff8801d23a6880 [ 42.402843] R13: ffff8801d0f55c50 R14: ffff8801d2547960 R15: ffff8801d23a6880 [ 42.410093] ? strp_data_ready+0x2b7/0x390 [ 42.414302] ? strp_data_ready+0x2b7/0x390 [ 42.418507] psock_data_ready+0x56/0x70 [ 42.422451] unix_dgram_sendmsg+0xa72/0x1600 [ 42.426844] ? unix_shutdown+0x870/0x870 [ 42.430872] ? lock_downgrade+0x990/0x990 [ 42.434991] ? lock_release+0xa40/0xa40 [ 42.438948] unix_seqpacket_sendmsg+0xf3/0x160 [ 42.443497] ? unix_dgram_sendmsg+0x1600/0x1600 [ 42.448138] sock_sendmsg+0xca/0x110 [ 42.451842] ___sys_sendmsg+0x31c/0x890 [ 42.455809] ? copy_msghdr_from_user+0x590/0x590 [ 42.460556] ? __fget_light+0x297/0x380 [ 42.464503] ? fget_raw+0x20/0x20 [ 42.467932] ? __do_page_fault+0x64c/0xd60 [ 42.472148] ? __fdget+0x18/0x20 [ 42.475497] __sys_sendmmsg+0x1e6/0x5f0 [ 42.479443] ? __sys_sendmmsg+0x1e6/0x5f0 [ 42.483567] ? SyS_sendmsg+0x50/0x50 [ 42.487256] ? mm_fault_error+0x2c0/0x2c0 [ 42.491370] ? do_vfs_ioctl+0x486/0x1520 [ 42.495396] ? _cond_resched+0x14/0x30 [ 42.499261] ? __do_page_fault+0xd60/0xd60 [ 42.503469] ? __fd_install+0x69b/0x6a0 [ 42.507413] ? sock_map_fd+0x53/0x70 [ 42.511105] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.516095] SyS_sendmmsg+0x35/0x60 [ 42.519698] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.524423] RIP: 0033:0x440309 [ 42.527583] RSP: 002b:00007ffc167c6048 EFLAGS: 00000217 ORIG_RAX: 0000000000000133 [ 42.535266] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309 [ 42.542506] RDX: 0000000000000003 RSI: 00000000204eff4c RDI: 0000000000000004 [ 42.549743] RBP: 0000000000000082 R08: 0000000000401c70 R09: 0000000000401c70 [ 42.556979] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401c70 [ 42.564218] R13: 0000000000401d00 R14: 0000000000000000 R15: 0000000000000000 [ 42.571611] Dumping ftrace buffer: [ 42.575163] (ftrace buffer empty) [ 42.578845] Kernel Offset: disabled [ 42.582445] Rebooting in 86400 seconds..