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-8,10.128.0.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.134492] ------------[ cut here ]------------ [ 41.135221] WARNING: CPU: 1 PID: 2994 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390 [ 41.136558] Kernel panic - not syncing: panic_on_warn set ... [ 41.136558] [ 41.137629] CPU: 1 PID: 2994 Comm: syzkaller722626 Not tainted 4.14.0-rc5-next-20171018+ #36 [ 41.138749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.139967] Call Trace: [ 41.140388] dump_stack+0x194/0x257 [ 41.140890] ? arch_local_irq_restore+0x53/0x53 [ 41.141516] ? vsnprintf+0x1ed/0x1900 [ 41.142036] panic+0x1e4/0x41c [ 41.142485] ? refcount_error_report+0x214/0x214 [ 41.143118] ? show_regs_print_info+0x65/0x65 [ 41.143724] ? __warn+0x1a9/0x1e0 [ 41.144193] ? strp_data_ready+0x2b7/0x390 [ 41.144764] __warn+0x1c4/0x1e0 [ 41.145236] ? strp_data_ready+0x2b7/0x390 [ 41.145805] report_bug+0x211/0x2d0 [ 41.146300] fixup_bug+0x40/0x90 [ 41.146755] do_trap+0x260/0x390 [ 41.147231] do_error_trap+0x120/0x390 [ 41.147753] ? sk_filter_trim_cap+0x3f3/0x9b0 [ 41.148356] ? do_trap+0x390/0x390 [ 41.148850] ? strp_data_ready+0x2b7/0x390 [ 41.149424] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.150074] do_invalid_op+0x1b/0x20 [ 41.150573] invalid_op+0x18/0x20 [ 41.151039] RIP: 0010:strp_data_ready+0x2b7/0x390 [ 41.151679] RSP: 0018:ffff8801d1f077d8 EFLAGS: 00010293 [ 41.152391] RAX: ffff8801d1d38000 RBX: ffff8801d2c62c48 RCX: ffffffff847af437 [ 41.153360] RDX: 0000000000000000 RSI: ffff8801d1c480e0 RDI: ffffffff85cc4be0 [ 41.154311] RBP: ffff8801d1f077f8 R08: 0000000000000002 R09: 1ffffffff0cddfbe [ 41.159753] R10: ffff8801d1f076c0 R11: 1ffff1003a3a725b R12: ffff8801d1c48040 [ 41.166990] R13: ffff8801d2c62c50 R14: ffff8801d1f07960 R15: ffff8801d1c48040 [ 41.174239] ? strp_data_ready+0x2b7/0x390 [ 41.178446] ? strp_data_ready+0x2b7/0x390 [ 41.182651] psock_data_ready+0x56/0x70 [ 41.186594] unix_dgram_sendmsg+0xa72/0x1600 [ 41.190981] ? unix_shutdown+0x870/0x870 [ 41.195009] ? lock_downgrade+0x990/0x990 [ 41.199124] ? lock_release+0xa40/0xa40 [ 41.203079] unix_seqpacket_sendmsg+0xf3/0x160 [ 41.207627] ? unix_dgram_sendmsg+0x1600/0x1600 [ 41.212265] sock_sendmsg+0xca/0x110 [ 41.215950] ___sys_sendmsg+0x31c/0x890 [ 41.219896] ? copy_msghdr_from_user+0x590/0x590 [ 41.224650] ? __do_page_fault+0x64c/0xd60 [ 41.228850] ? lock_downgrade+0x990/0x990 [ 41.232975] ? __fdget+0x18/0x20 [ 41.236311] __sys_sendmmsg+0x1e6/0x5f0 [ 41.240252] ? __sys_sendmmsg+0x1e6/0x5f0 [ 41.244372] ? SyS_sendmsg+0x50/0x50 [ 41.248062] ? mm_fault_error+0x2c0/0x2c0 [ 41.252179] ? do_vfs_ioctl+0x486/0x1520 [ 41.256204] ? _cond_resched+0x14/0x30 [ 41.260067] ? __do_page_fault+0xd60/0xd60 [ 41.264269] ? __fd_install+0x69b/0x6a0 [ 41.268212] ? sock_map_fd+0x53/0x70 [ 41.271906] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.276892] SyS_sendmmsg+0x35/0x60 [ 41.280489] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 41.285215] RIP: 0033:0x440659 [ 41.288371] RSP: 002b:00007ffe1fafca18 EFLAGS: 00000217 ORIG_RAX: 0000000000000133 [ 41.296046] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440659 [ 41.303280] RDX: 0000000000000004 RSI: 0000000020ed9f10 RDI: 0000000000000004 [ 41.310522] RBP: 0000000000000082 R08: 0000000000401fc0 R09: 0000000000401fc0 [ 41.317759] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401fc0 [ 41.324999] R13: 0000000000402050 R14: 0000000000000000 R15: 0000000000000000 [ 41.332390] Dumping ftrace buffer: [ 41.335943] (ftrace buffer empty) [ 41.339625] Kernel Offset: disabled [ 41.343221] Rebooting in 86400 seconds..