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-mmots-kasan-gce-6,10.128.0.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.187367] ------------[ cut here ]------------ [ 42.188231] WARNING: CPU: 1 PID: 2991 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390 [ 42.189569] Kernel panic - not syncing: panic_on_warn set ... [ 42.189569] [ 42.190540] CPU: 1 PID: 2991 Comm: syzkaller051054 Not tainted 4.14.0-rc5-mm1+ #20 [ 42.191596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.192919] Call Trace: [ 42.193282] dump_stack+0x194/0x257 [ 42.193778] ? arch_local_irq_restore+0x53/0x53 [ 42.194419] ? vsnprintf+0x1ed/0x1900 [ 42.194935] panic+0x1e4/0x41c [ 42.195368] ? refcount_error_report+0x214/0x214 [ 42.196000] ? show_regs_print_info+0x65/0x65 [ 42.196607] ? __warn+0x1a9/0x1e0 [ 42.197078] ? strp_data_ready+0x2b7/0x390 [ 42.197643] __warn+0x1c4/0x1e0 [ 42.198115] ? strp_data_ready+0x2b7/0x390 [ 42.198686] report_bug+0x211/0x2d0 [ 42.199209] fixup_bug+0x40/0x90 [ 42.199667] do_trap+0x260/0x390 [ 42.200187] do_error_trap+0x120/0x390 [ 42.200722] ? sk_filter_trim_cap+0x3f3/0x9b0 [ 42.201347] ? do_trap+0x390/0x390 [ 42.201826] ? strp_data_ready+0x2b7/0x390 [ 42.202405] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.203066] do_invalid_op+0x1b/0x20 [ 42.203567] invalid_op+0x18/0x20 [ 42.204066] RIP: 0010:strp_data_ready+0x2b7/0x390 [ 42.204707] RSP: 0018:ffff8801d1e677c8 EFLAGS: 00010293 [ 42.205438] RAX: ffff8801d2328640 RBX: ffff8801d1cf1c48 RCX: ffffffff847b0437 [ 42.206402] RDX: 0000000000000000 RSI: ffff8801d2090160 RDI: ffffffff85cc4e60 [ 42.207354] RBP: ffff8801d1e677e8 R08: 0000000000000002 R09: 1ffffffff0cddfc6 [ 42.208307] R10: ffff8801d1e676b0 R11: 1ffff1003a465323 R12: ffff8801d20900c0 [ 42.215543] R13: ffff8801d1cf1c50 R14: ffff8801d1e67950 R15: ffff8801d20900c0 [ 42.222791] ? strp_data_ready+0x2b7/0x390 [ 42.226999] ? strp_data_ready+0x2b7/0x390 [ 42.231207] psock_data_ready+0x56/0x70 [ 42.235153] unix_dgram_sendmsg+0xa72/0x1600 [ 42.239543] ? unix_shutdown+0x870/0x870 [ 42.243578] ? avc_has_perm+0x43e/0x680 [ 42.247526] ? do_raw_spin_trylock+0x190/0x190 [ 42.252083] unix_seqpacket_sendmsg+0xf3/0x160 [ 42.256635] ? unix_dgram_sendmsg+0x1600/0x1600 [ 42.261278] sock_sendmsg+0xca/0x110 [ 42.264961] sock_write_iter+0x31a/0x5d0 [ 42.268991] ? sock_sendmsg+0x110/0x110 [ 42.272943] ? selinux_task_alloc+0xc0/0xc0 [ 42.277234] ? __might_sleep+0x9c/0x190 [ 42.281182] do_iter_readv_writev+0x525/0x7f0 [ 42.285648] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 42.290378] ? rw_verify_area+0xe5/0x2b0 [ 42.294411] do_iter_write+0x154/0x540 [ 42.298266] ? dup_iter+0x260/0x260 [ 42.301871] vfs_writev+0x18a/0x340 [ 42.305463] ? __fget_light+0x297/0x380 [ 42.309407] ? vfs_iter_write+0xb0/0xb0 [ 42.313351] ? up_read+0x1a/0x40 [ 42.316685] ? __do_page_fault+0x3d6/0xd60 [ 42.320888] ? sock_do_ioctl+0x73/0xb0 [ 42.324754] ? mm_fault_error+0x2c0/0x2c0 [ 42.328868] ? dlci_ioctl_set+0x40/0x40 [ 42.332828] ? __fdget_raw+0x20/0x20 [ 42.336515] ? __do_page_fault+0xd60/0xd60 [ 42.340723] do_writev+0xfc/0x2a0 [ 42.344143] ? do_writev+0xfc/0x2a0 [ 42.347741] ? vfs_writev+0x340/0x340 [ 42.351514] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 42.356324] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.361312] SyS_writev+0x27/0x30 [ 42.364735] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.369462] RIP: 0033:0x43fe99 [ 42.372621] RSP: 002b:00007ffcd689b208 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 [ 42.380294] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe99 [ 42.387532] RDX: 0000000000000005 RSI: 0000000020019fb0 RDI: 0000000000000004 [ 42.394771] RBP: 0000000000000082 R08: 0000000000401800 R09: 0000000000401800 [ 42.402013] R10: 0000000000401800 R11: 0000000000000217 R12: 0000000000401800 [ 42.409248] R13: 0000000000401890 R14: 0000000000000000 R15: 0000000000000000 [ 42.416969] Dumping ftrace buffer: [ 42.420532] (ftrace buffer empty) [ 42.424212] Kernel Offset: disabled [ 42.427812] Rebooting in 86400 seconds..