[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 9.326710] rsyslogd (2865) used greatest stack depth: 14512 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-next-kasan-gce-9,10.128.15.223' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.289212] ------------[ cut here ]------------ [ 42.290014] WARNING: CPU: 1 PID: 2989 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390 [ 42.291412] Kernel panic - not syncing: panic_on_warn set ... [ 42.291412] [ 42.292383] CPU: 1 PID: 2989 Comm: syzkaller885750 Not tainted 4.14.0-rc5-next-20171018+ #36 [ 42.293514] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.294779] Call Trace: [ 42.295141] dump_stack+0x194/0x257 [ 42.295633] ? arch_local_irq_restore+0x53/0x53 [ 42.296262] ? vsnprintf+0x1ed/0x1900 [ 42.296783] panic+0x1e4/0x41c [ 42.297229] ? refcount_error_report+0x214/0x214 [ 42.297865] ? show_regs_print_info+0x65/0x65 [ 42.298474] ? __warn+0x1a9/0x1e0 [ 42.298945] ? strp_data_ready+0x2b7/0x390 [ 42.299511] __warn+0x1c4/0x1e0 [ 42.299957] ? strp_data_ready+0x2b7/0x390 [ 42.300547] report_bug+0x211/0x2d0 [ 42.301046] fixup_bug+0x40/0x90 [ 42.301501] do_trap+0x260/0x390 [ 42.301963] do_error_trap+0x120/0x390 [ 42.302504] ? sk_filter_trim_cap+0x3f3/0x9b0 [ 42.303107] ? do_trap+0x390/0x390 [ 42.303585] ? strp_data_ready+0x2b7/0x390 [ 42.304164] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.304814] do_invalid_op+0x1b/0x20 [ 42.305315] invalid_op+0x18/0x20 [ 42.305781] RIP: 0010:strp_data_ready+0x2b7/0x390 [ 42.306424] RSP: 0018:ffff8801d255f7d8 EFLAGS: 00010293 [ 42.307140] RAX: ffff8801d1cda7c0 RBX: ffff8801d2ff6c48 RCX: ffffffff847af437 [ 42.308112] RDX: 0000000000000000 RSI: ffff8801d20230e0 RDI: ffffffff85cc4be0 [ 42.309065] RBP: ffff8801d255f7f8 R08: 0000000000000002 R09: 1ffffffff0cddfbe [ 42.310041] R10: ffff8801d255f6c0 R11: 1ffff1003a39b753 R12: ffff8801d2023040 [ 42.317279] R13: ffff8801d2ff6c50 R14: ffff8801d255f960 R15: ffff8801d2023040 [ 42.324529] ? strp_data_ready+0x2b7/0x390 [ 42.328737] ? strp_data_ready+0x2b7/0x390 [ 42.332947] psock_data_ready+0x56/0x70 [ 42.336895] unix_dgram_sendmsg+0xa72/0x1600 [ 42.341285] ? unix_shutdown+0x870/0x870 [ 42.345322] ? kasan_check_write+0x14/0x20 [ 42.349539] unix_seqpacket_sendmsg+0xf3/0x160 [ 42.354089] ? unix_dgram_sendmsg+0x1600/0x1600 [ 42.358727] sock_sendmsg+0xca/0x110 [ 42.362409] ___sys_sendmsg+0x31c/0x890 [ 42.366354] ? copy_msghdr_from_user+0x590/0x590 [ 42.371084] ? find_held_lock+0x35/0x1d0 [ 42.375123] ? handle_mm_fault+0x248/0x8d0 [ 42.379325] ? __fget_light+0x297/0x380 [ 42.383265] ? fget_raw+0x20/0x20 [ 42.386694] ? __do_page_fault+0x64c/0xd60 [ 42.390895] ? lock_downgrade+0x990/0x990 [ 42.395020] ? __fdget+0x18/0x20 [ 42.398357] __sys_sendmmsg+0x1e6/0x5f0 [ 42.402298] ? __sys_sendmmsg+0x1e6/0x5f0 [ 42.406419] ? SyS_sendmsg+0x50/0x50 [ 42.410118] ? mm_fault_error+0x2c0/0x2c0 [ 42.414232] ? do_vfs_ioctl+0x486/0x1520 [ 42.418269] ? _cond_resched+0x14/0x30 [ 42.422149] ? __do_page_fault+0xd60/0xd60 [ 42.426357] ? __fd_install+0x69b/0x6a0 [ 42.430300] ? sock_map_fd+0x53/0x70 [ 42.433993] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.438984] SyS_sendmmsg+0x35/0x60 [ 42.442584] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.447305] RIP: 0033:0x43fe69 [ 42.450460] RSP: 002b:00007ffef5fb3868 EFLAGS: 00000217 ORIG_RAX: 0000000000000133 [ 42.458134] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe69 [ 42.465372] RDX: 0000000000000001 RSI: 0000000020e83fc4 RDI: 0000000000000004 [ 42.472609] RBP: 0000000000000082 R08: 00000000004017d0 R09: 00000000004017d0 [ 42.479845] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004017d0 [ 42.487081] R13: 0000000000401860 R14: 0000000000000000 R15: 0000000000000000 [ 42.494506] Dumping ftrace buffer: [ 42.498058] (ftrace buffer empty) [ 42.501736] Kernel Offset: disabled [ 42.505334] Rebooting in 86400 seconds..