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 '10.128.10.27' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.009589] ================================================================== [ 40.016973] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 40.022834] CPU: 1 PID: 4489 Comm: syz-executor369 Not tainted 4.16.0+ #87 [ 40.029824] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.039156] Call Trace: [ 40.041722] dump_stack+0x185/0x1d0 [ 40.045328] ? pointer+0x11e5/0x1410 [ 40.049028] kmsan_report+0x142/0x240 [ 40.052814] __msan_warning_32+0x6c/0xb0 [ 40.056857] ? futex_wait_queue_me+0x401/0x710 [ 40.061417] pointer+0x11e5/0x1410 [ 40.064938] ? futex_wait_queue_me+0x476/0x710 [ 40.069501] vsnprintf+0xa2d/0x33c0 [ 40.073108] seq_printf+0x29f/0x420 [ 40.076724] ? save_stack_trace_tsk+0x26a/0x2f0 [ 40.081373] ? futex_wait_queue_me+0x476/0x710 [ 40.085935] ? futex_wait_queue_me+0x476/0x710 [ 40.090493] ? futex_wait_queue_me+0x476/0x710 [ 40.095057] proc_pid_stack+0x326/0x470 [ 40.099025] proc_single_show+0x1af/0x300 [ 40.103160] ? proc_pid_wchan+0x250/0x250 [ 40.107286] ? proc_single_open+0x90/0x90 [ 40.111410] seq_read+0xc7d/0x2260 [ 40.114931] ? __vfs_read+0xc9/0x9b0 [ 40.118622] ? seq_open+0x360/0x360 [ 40.122228] __vfs_read+0x1a5/0x9b0 [ 40.125850] vfs_read+0x36c/0x6c0 [ 40.129283] SYSC_pread64+0x275/0x310 [ 40.133075] SyS_pread64+0x65/0x90 [ 40.136600] do_syscall_64+0x309/0x430 [ 40.140466] ? SYSC_write+0x360/0x360 [ 40.144247] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.149412] RIP: 0033:0x445519 [ 40.152576] RSP: 002b:00007fd203572d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 40.160258] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 40.167507] RDX: 00000000ffffffa5 RSI: 0000000020000140 RDI: 0000000000000003 [ 40.174753] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 40.182008] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd203572d20 [ 40.189261] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 40.196508] [ 40.198108] Uninit was stored to memory at: [ 40.202705] kmsan_internal_chain_origin+0x12b/0x210 [ 40.207784] __msan_chain_origin+0x69/0xc0 [ 40.211999] __save_stack_trace+0x829/0xb00 [ 40.216304] save_stack_trace_tsk+0x258/0x2f0 [ 40.220776] proc_pid_stack+0x26a/0x470 [ 40.224725] proc_single_show+0x1af/0x300 [ 40.228850] seq_read+0xc7d/0x2260 [ 40.232369] __vfs_read+0x1a5/0x9b0 [ 40.235970] vfs_read+0x36c/0x6c0 [ 40.239400] SYSC_pread64+0x275/0x310 [ 40.243177] SyS_pread64+0x65/0x90 [ 40.246694] do_syscall_64+0x309/0x430 [ 40.250559] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.255718] Uninit was stored to memory at: [ 40.260034] kmsan_internal_chain_origin+0x12b/0x210 [ 40.265120] __msan_chain_origin+0x69/0xc0 [ 40.269333] update_stack_state+0x959/0xa40 [ 40.273631] unwind_next_frame+0x618/0xe50 [ 40.277845] __save_stack_trace+0x734/0xb00 [ 40.282145] save_stack_trace_tsk+0x258/0x2f0 [ 40.286618] proc_pid_stack+0x26a/0x470 [ 40.290569] proc_single_show+0x1af/0x300 [ 40.294691] seq_read+0xc7d/0x2260 [ 40.298207] __vfs_read+0x1a5/0x9b0 [ 40.301811] vfs_read+0x36c/0x6c0 [ 40.305245] SYSC_pread64+0x275/0x310 [ 40.309027] SyS_pread64+0x65/0x90 [ 40.312550] do_syscall_64+0x309/0x430 [ 40.316415] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.321578] Local variable description: ----flags.i.i.i@rcu_all_qs [ 40.327864] Variable was created at: [ 40.331553] rcu_all_qs+0x32/0x1f0 [ 40.335078] _cond_resched+0x3c/0xd0 [ 40.338760] ================================================================== [ 40.346090] Disabling lock debugging due to kernel taint [ 40.351512] Kernel panic - not syncing: panic_on_warn set ... [ 40.351512] [ 40.358855] CPU: 1 PID: 4489 Comm: syz-executor369 Tainted: G B 4.16.0+ #87 [ 40.367143] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.376472] Call Trace: [ 40.379046] dump_stack+0x185/0x1d0 [ 40.382657] panic+0x39d/0x940 [ 40.385835] ? pointer+0x11e5/0x1410 [ 40.389534] kmsan_report+0x238/0x240 [ 40.393311] __msan_warning_32+0x6c/0xb0 [ 40.397355] ? futex_wait_queue_me+0x401/0x710 [ 40.401912] pointer+0x11e5/0x1410 [ 40.405431] ? futex_wait_queue_me+0x476/0x710 [ 40.409989] vsnprintf+0xa2d/0x33c0 [ 40.413597] seq_printf+0x29f/0x420 [ 40.417210] ? save_stack_trace_tsk+0x26a/0x2f0 [ 40.421858] ? futex_wait_queue_me+0x476/0x710 [ 40.426420] ? futex_wait_queue_me+0x476/0x710 [ 40.430983] ? futex_wait_queue_me+0x476/0x710 [ 40.435547] proc_pid_stack+0x326/0x470 [ 40.439502] proc_single_show+0x1af/0x300 [ 40.443627] ? proc_pid_wchan+0x250/0x250 [ 40.447751] ? proc_single_open+0x90/0x90 [ 40.451872] seq_read+0xc7d/0x2260 [ 40.455392] ? __vfs_read+0xc9/0x9b0 [ 40.459081] ? seq_open+0x360/0x360 [ 40.462686] __vfs_read+0x1a5/0x9b0 [ 40.466296] vfs_read+0x36c/0x6c0 [ 40.469727] SYSC_pread64+0x275/0x310 [ 40.473505] SyS_pread64+0x65/0x90 [ 40.477030] do_syscall_64+0x309/0x430 [ 40.480906] ? SYSC_write+0x360/0x360 [ 40.484688] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.489855] RIP: 0033:0x445519 [ 40.493029] RSP: 002b:00007fd203572d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 40.500723] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 40.507970] RDX: 00000000ffffffa5 RSI: 0000000020000140 RDI: 0000000000000003 [ 40.515215] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 40.522458] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd203572d20 [ 40.529704] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 40.537357] Dumping ftrace buffer: [ 40.540873] (ftrace buffer empty) [ 40.544555] Kernel Offset: disabled [ 40.548155] Rebooting in 86400 seconds..