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-1,10.128.15.205' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.024595] ------------[ cut here ]------------ [ 34.025428] WARNING: CPU: 0 PID: 2991 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390 [ 34.026920] Kernel panic - not syncing: panic_on_warn set ... [ 34.026920] [ 34.027937] CPU: 0 PID: 2991 Comm: syzkaller210235 Not tainted 4.14.0-rc5-mm1+ #20 [ 34.028963] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.030238] Call Trace: [ 34.030597] dump_stack+0x194/0x257 [ 34.031089] ? arch_local_irq_restore+0x53/0x53 [ 34.031754] ? vsnprintf+0x1ed/0x1900 [ 34.032272] panic+0x1e4/0x41c [ 34.032724] ? refcount_error_report+0x214/0x214 [ 34.033390] ? show_regs_print_info+0x65/0x65 [ 34.033995] ? __warn+0x1a9/0x1e0 [ 34.034464] ? strp_data_ready+0x2b7/0x390 [ 34.035038] __warn+0x1c4/0x1e0 [ 34.035581] ? strp_data_ready+0x2b7/0x390 [ 34.036329] report_bug+0x211/0x2d0 [ 34.036853] fixup_bug+0x40/0x90 [ 34.037326] do_trap+0x260/0x390 [ 34.037788] do_error_trap+0x120/0x390 [ 34.038330] ? sk_filter_trim_cap+0x3f3/0x9b0 [ 34.038933] ? do_trap+0x390/0x390 [ 34.039441] ? strp_data_ready+0x2b7/0x390 [ 34.040044] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.040710] do_invalid_op+0x1b/0x20 [ 34.041259] invalid_op+0x18/0x20 [ 34.041739] RIP: 0010:strp_data_ready+0x2b7/0x390 [ 34.042380] RSP: 0018:ffff8801d1d8f7d8 EFLAGS: 00010293 [ 34.043090] RAX: ffff8801d1d367c0 RBX: ffff8801d26d4c48 RCX: ffffffff847b0437 [ 34.044102] RDX: 0000000000000000 RSI: ffff8801d23687e0 RDI: ffffffff85cc4e60 [ 34.047454] RBP: ffff8801d1d8f7f8 R08: 0000000000000002 R09: 1ffffffff0cddfc6 [ 34.054689] R10: ffff8801d1d8f6c0 R11: 1ffff1003a3a6f53 R12: ffff8801d2368740 [ 34.061926] R13: ffff8801d26d4c50 R14: ffff8801d1d8f960 R15: ffff8801d2368740 [ 34.069176] ? strp_data_ready+0x2b7/0x390 [ 34.073382] ? strp_data_ready+0x2b7/0x390 [ 34.077585] psock_data_ready+0x56/0x70 [ 34.081530] unix_dgram_sendmsg+0xa72/0x1600 [ 34.085922] ? unix_shutdown+0x870/0x870 [ 34.089949] ? lock_downgrade+0x990/0x990 [ 34.094071] ? lock_release+0xa40/0xa40 [ 34.098028] unix_seqpacket_sendmsg+0xf3/0x160 [ 34.102577] ? unix_dgram_sendmsg+0x1600/0x1600 [ 34.107995] sock_sendmsg+0xca/0x110 [ 34.111676] ___sys_sendmsg+0x31c/0x890 [ 34.115621] ? copy_msghdr_from_user+0x590/0x590 [ 34.120373] ? __do_page_fault+0x64c/0xd60 [ 34.124577] ? lock_downgrade+0x990/0x990 [ 34.128701] ? __fdget+0x18/0x20 [ 34.132039] __sys_sendmmsg+0x1e6/0x5f0 [ 34.135978] ? __sys_sendmmsg+0x1e6/0x5f0 [ 34.140101] ? SyS_sendmsg+0x50/0x50 [ 34.143785] ? mm_fault_error+0x2c0/0x2c0 [ 34.147898] ? do_vfs_ioctl+0x486/0x1520 [ 34.151924] ? _cond_resched+0x14/0x30 [ 34.155789] ? __do_page_fault+0xd60/0xd60 [ 34.159993] ? __fd_install+0x66b/0x6a0 [ 34.163935] ? sock_map_fd+0x53/0x70 [ 34.167623] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.172612] SyS_sendmmsg+0x35/0x60 [ 34.176207] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 34.180927] RIP: 0033:0x440659 [ 34.184082] RSP: 002b:00007ffc70289268 EFLAGS: 00000217 ORIG_RAX: 0000000000000133 [ 34.191753] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440659 [ 34.198988] RDX: 0000000000000004 RSI: 0000000020ed9f10 RDI: 0000000000000004 [ 34.206224] RBP: 0000000000000082 R08: 0000000000401fc0 R09: 0000000000401fc0 [ 34.213458] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401fc0 [ 34.220693] R13: 0000000000402050 R14: 0000000000000000 R15: 0000000000000000 [ 34.228037] Dumping ftrace buffer: [ 34.231575] (ftrace buffer empty) [ 34.235254] Kernel Offset: disabled [ 34.238850] Rebooting in 86400 seconds..