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 '10.128.0.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.259695] ================================================================== [ 42.267087] BUG: KMSAN: uninit-value in ebt_stp_mt_check+0x248/0x410 [ 42.273567] CPU: 0 PID: 4520 Comm: syzkaller565841 Not tainted 4.16.0+ #85 [ 42.280554] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.289884] Call Trace: [ 42.292451] dump_stack+0x185/0x1d0 [ 42.296061] ? ebt_stp_mt_check+0x248/0x410 [ 42.300358] kmsan_report+0x142/0x240 [ 42.304134] __msan_warning_32+0x6c/0xb0 [ 42.308170] ebt_stp_mt_check+0x248/0x410 [ 42.312294] ? ebt_stp_mt+0x24c0/0x24c0 [ 42.316246] xt_check_match+0x1449/0x1660 [ 42.320371] ? mutex_lock+0x31/0x90 [ 42.323976] ? mutex_unlock+0x15/0x80 [ 42.327760] ? xt_find_match+0x72a/0x7e0 [ 42.331797] translate_table+0x3ffd/0x5e10 [ 42.336019] ? __msan_poison_alloca+0x15c/0x1d0 [ 42.340679] do_replace_finish+0x1258/0x2ea0 [ 42.345076] do_replace+0x707/0x770 [ 42.348682] do_ebt_set_ctl+0x2ab/0x3c0 [ 42.352634] ? rcu_all_qs+0x32/0x1f0 [ 42.356325] ? mutex_lock+0x31/0x90 [ 42.359930] ? ebt_cleanup_entry+0xb10/0xb10 [ 42.364314] nf_setsockopt+0x476/0x4d0 [ 42.368194] ip_setsockopt+0x24b/0x2b0 [ 42.372064] ? ipv4_pktinfo_prepare+0x650/0x650 [ 42.376708] dccp_setsockopt+0x1c3/0x1f0 [ 42.380745] ? dccp_ioctl+0x290/0x290 [ 42.384523] sock_common_setsockopt+0x136/0x170 [ 42.389167] ? sock_common_recvmsg+0x270/0x270 [ 42.393724] SYSC_setsockopt+0x4b8/0x570 [ 42.397762] SyS_setsockopt+0x76/0xa0 [ 42.401538] do_syscall_64+0x309/0x430 [ 42.405400] ? SYSC_recv+0xe0/0xe0 [ 42.408922] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.414088] RIP: 0033:0x445d39 [ 42.417252] RSP: 002b:00007efff4e14da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 42.424936] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445d39 [ 42.432180] RDX: 0000000000000080 RSI: 0000000000000000 RDI: 0000000000000003 [ 42.439421] RBP: 0000000000000000 R08: 0000000000000358 R09: 0000000000000000 [ 42.446670] R10: 00000000200008c0 R11: 0000000000000246 R12: 00000000006dac20 [ 42.453914] R13: 006567646972625f R14: 6f745f3168746576 R15: 0000000000000002 [ 42.461160] [ 42.462771] Local variable description: ----mtpar.i@translate_table [ 42.469143] Variable was created at: [ 42.472842] translate_table+0xb9/0x5e10 [ 42.476878] do_replace_finish+0x1258/0x2ea0 [ 42.481257] ================================================================== [ 42.488585] Disabling lock debugging due to kernel taint [ 42.494010] Kernel panic - not syncing: panic_on_warn set ... [ 42.494010] [ 42.501365] CPU: 0 PID: 4520 Comm: syzkaller565841 Tainted: G B 4.16.0+ #85 [ 42.509651] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.518987] Call Trace: [ 42.521563] dump_stack+0x185/0x1d0 [ 42.525167] panic+0x39d/0x940 [ 42.528347] ? ebt_stp_mt_check+0x248/0x410 [ 42.532643] kmsan_report+0x238/0x240 [ 42.536421] __msan_warning_32+0x6c/0xb0 [ 42.540457] ebt_stp_mt_check+0x248/0x410 [ 42.544581] ? ebt_stp_mt+0x24c0/0x24c0 [ 42.548532] xt_check_match+0x1449/0x1660 [ 42.552659] ? mutex_lock+0x31/0x90 [ 42.556263] ? mutex_unlock+0x15/0x80 [ 42.560050] ? xt_find_match+0x72a/0x7e0 [ 42.564095] translate_table+0x3ffd/0x5e10 [ 42.568310] ? __msan_poison_alloca+0x15c/0x1d0 [ 42.572960] do_replace_finish+0x1258/0x2ea0 [ 42.577351] do_replace+0x707/0x770 [ 42.580956] do_ebt_set_ctl+0x2ab/0x3c0 [ 42.584909] ? rcu_all_qs+0x32/0x1f0 [ 42.588599] ? mutex_lock+0x31/0x90 [ 42.592201] ? ebt_cleanup_entry+0xb10/0xb10 [ 42.596583] nf_setsockopt+0x476/0x4d0 [ 42.600449] ip_setsockopt+0x24b/0x2b0 [ 42.604313] ? ipv4_pktinfo_prepare+0x650/0x650 [ 42.608956] dccp_setsockopt+0x1c3/0x1f0 [ 42.612995] ? dccp_ioctl+0x290/0x290 [ 42.616780] sock_common_setsockopt+0x136/0x170 [ 42.621426] ? sock_common_recvmsg+0x270/0x270 [ 42.626010] SYSC_setsockopt+0x4b8/0x570 [ 42.630063] SyS_setsockopt+0x76/0xa0 [ 42.633841] do_syscall_64+0x309/0x430 [ 42.637705] ? SYSC_recv+0xe0/0xe0 [ 42.641221] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.646385] RIP: 0033:0x445d39 [ 42.649551] RSP: 002b:00007efff4e14da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 42.657232] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445d39 [ 42.664477] RDX: 0000000000000080 RSI: 0000000000000000 RDI: 0000000000000003 [ 42.671721] RBP: 0000000000000000 R08: 0000000000000358 R09: 0000000000000000 [ 42.678966] R10: 00000000200008c0 R11: 0000000000000246 R12: 00000000006dac20 [ 42.686212] R13: 006567646972625f R14: 6f745f3168746576 R15: 0000000000000002 [ 42.693897] Dumping ftrace buffer: [ 42.697428] (ftrace buffer empty) [ 42.701111] Kernel Offset: disabled [ 42.704713] Rebooting in 86400 seconds..