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 '10.128.10.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 61.047712] ================================================================== [ 61.055102] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 61.060969] CPU: 1 PID: 4491 Comm: syz-executor026 Not tainted 4.16.0+ #87 [ 61.067955] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.077291] Call Trace: [ 61.079858] dump_stack+0x185/0x1d0 [ 61.083469] ? pointer+0x11e5/0x1410 [ 61.087158] kmsan_report+0x142/0x240 [ 61.090938] __msan_warning_32+0x6c/0xb0 [ 61.094977] ? futex_wait_queue_me+0x401/0x710 [ 61.099533] pointer+0x11e5/0x1410 [ 61.103056] ? futex_wait_queue_me+0x476/0x710 [ 61.107612] vsnprintf+0xa2d/0x33c0 [ 61.111218] seq_printf+0x29f/0x420 [ 61.114831] ? save_stack_trace_tsk+0x26a/0x2f0 [ 61.119483] ? futex_wait_queue_me+0x476/0x710 [ 61.124041] ? futex_wait_queue_me+0x476/0x710 [ 61.128607] ? futex_wait_queue_me+0x476/0x710 [ 61.133163] proc_pid_stack+0x326/0x470 [ 61.137121] proc_single_show+0x1af/0x300 [ 61.141247] ? proc_pid_wchan+0x250/0x250 [ 61.145370] ? proc_single_open+0x90/0x90 [ 61.149498] seq_read+0xc7d/0x2260 [ 61.153019] do_iter_read+0x880/0xd70 [ 61.156795] ? seq_open+0x360/0x360 [ 61.160397] do_preadv+0x3a1/0x580 [ 61.163930] ? syscall_return_slowpath+0xe9/0x700 [ 61.168753] SYSC_preadv+0xc6/0xe0 [ 61.172270] SyS_preadv+0x77/0xa0 [ 61.175697] do_syscall_64+0x309/0x430 [ 61.179565] ? SYSC_writev+0xb0/0xb0 [ 61.183257] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 61.188424] RIP: 0033:0x445539 [ 61.191594] RSP: 002b:00007f0be5526d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 [ 61.199275] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445539 [ 61.206519] RDX: 0000000000000001 RSI: 00000000200001c0 RDI: 0000000000000003 [ 61.213765] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 61.221010] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0be5526d20 [ 61.228255] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 61.235508] [ 61.237106] Uninit was stored to memory at: [ 61.241411] kmsan_internal_chain_origin+0x12b/0x210 [ 61.246490] __msan_chain_origin+0x69/0xc0 [ 61.250701] __save_stack_trace+0x829/0xb00 [ 61.254998] save_stack_trace_tsk+0x258/0x2f0 [ 61.259469] proc_pid_stack+0x26a/0x470 [ 61.263420] proc_single_show+0x1af/0x300 [ 61.267541] seq_read+0xc7d/0x2260 [ 61.271058] do_iter_read+0x880/0xd70 [ 61.274835] do_preadv+0x3a1/0x580 [ 61.278354] SYSC_preadv+0xc6/0xe0 [ 61.281871] SyS_preadv+0x77/0xa0 [ 61.285300] do_syscall_64+0x309/0x430 [ 61.289163] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 61.294321] Uninit was stored to memory at: [ 61.298620] kmsan_internal_chain_origin+0x12b/0x210 [ 61.303697] __msan_chain_origin+0x69/0xc0 [ 61.307917] update_stack_state+0x959/0xa40 [ 61.312220] unwind_next_frame+0x618/0xe50 [ 61.316431] __save_stack_trace+0x734/0xb00 [ 61.320734] save_stack_trace_tsk+0x258/0x2f0 [ 61.325203] proc_pid_stack+0x26a/0x470 [ 61.329151] proc_single_show+0x1af/0x300 [ 61.333280] seq_read+0xc7d/0x2260 [ 61.336797] do_iter_read+0x880/0xd70 [ 61.340571] do_preadv+0x3a1/0x580 [ 61.344093] SYSC_preadv+0xc6/0xe0 [ 61.347607] SyS_preadv+0x77/0xa0 [ 61.351034] do_syscall_64+0x309/0x430 [ 61.354902] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 61.360061] Local variable description: ----flags.i.i.i@rcu_all_qs [ 61.366362] Variable was created at: [ 61.370061] rcu_all_qs+0x32/0x1f0 [ 61.373587] _cond_resched+0x3c/0xd0 [ 61.377363] ================================================================== [ 61.384691] Disabling lock debugging due to kernel taint [ 61.390115] Kernel panic - not syncing: panic_on_warn set ... [ 61.390115] [ 61.397463] CPU: 1 PID: 4491 Comm: syz-executor026 Tainted: G B 4.16.0+ #87 [ 61.405750] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.415077] Call Trace: [ 61.417643] dump_stack+0x185/0x1d0 [ 61.421249] panic+0x39d/0x940 [ 61.424426] ? pointer+0x11e5/0x1410 [ 61.428113] kmsan_report+0x238/0x240 [ 61.431890] __msan_warning_32+0x6c/0xb0 [ 61.435931] ? futex_wait_queue_me+0x401/0x710 [ 61.440485] pointer+0x11e5/0x1410 [ 61.444002] ? futex_wait_queue_me+0x476/0x710 [ 61.448558] vsnprintf+0xa2d/0x33c0 [ 61.452165] seq_printf+0x29f/0x420 [ 61.455778] ? save_stack_trace_tsk+0x26a/0x2f0 [ 61.460421] ? futex_wait_queue_me+0x476/0x710 [ 61.464978] ? futex_wait_queue_me+0x476/0x710 [ 61.469539] ? futex_wait_queue_me+0x476/0x710 [ 61.474095] proc_pid_stack+0x326/0x470 [ 61.478048] proc_single_show+0x1af/0x300 [ 61.482172] ? proc_pid_wchan+0x250/0x250 [ 61.486297] ? proc_single_open+0x90/0x90 [ 61.490427] seq_read+0xc7d/0x2260 [ 61.493948] do_iter_read+0x880/0xd70 [ 61.497723] ? seq_open+0x360/0x360 [ 61.501325] do_preadv+0x3a1/0x580 [ 61.504848] ? syscall_return_slowpath+0xe9/0x700 [ 61.509676] SYSC_preadv+0xc6/0xe0 [ 61.513194] SyS_preadv+0x77/0xa0 [ 61.516623] do_syscall_64+0x309/0x430 [ 61.520492] ? SYSC_writev+0xb0/0xb0 [ 61.524184] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 61.529346] RIP: 0033:0x445539 [ 61.532514] RSP: 002b:00007f0be5526d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 [ 61.540198] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445539 [ 61.547447] RDX: 0000000000000001 RSI: 00000000200001c0 RDI: 0000000000000003 [ 61.554703] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 61.561950] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0be5526d20 [ 61.569289] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 61.577079] Dumping ftrace buffer: [ 61.580596] (ftrace buffer empty) [ 61.584278] Kernel Offset: disabled [ 61.587893] Rebooting in 86400 seconds..