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 '10.128.10.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.401229] ================================================================== [ 42.408658] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 42.414523] CPU: 0 PID: 4513 Comm: syz-executor473 Not tainted 4.16.0+ #87 [ 42.421520] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.430853] Call Trace: [ 42.433431] dump_stack+0x185/0x1d0 [ 42.437044] ? pointer+0x11e5/0x1410 [ 42.440736] kmsan_report+0x142/0x240 [ 42.444516] __msan_warning_32+0x6c/0xb0 [ 42.448567] ? futex_wait_queue_me+0x401/0x710 [ 42.453125] pointer+0x11e5/0x1410 [ 42.456643] ? futex_wait_queue_me+0x476/0x710 [ 42.461204] vsnprintf+0xa2d/0x33c0 [ 42.464820] seq_printf+0x29f/0x420 [ 42.468436] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.473086] ? futex_wait_queue_me+0x476/0x710 [ 42.477648] ? futex_wait_queue_me+0x476/0x710 [ 42.482209] ? futex_wait_queue_me+0x476/0x710 [ 42.486774] proc_pid_stack+0x326/0x470 [ 42.490729] proc_single_show+0x1af/0x300 [ 42.494854] ? proc_pid_wchan+0x250/0x250 [ 42.498979] ? proc_single_open+0x90/0x90 [ 42.503103] seq_read+0xc7d/0x2260 [ 42.506625] ? __vfs_read+0xc9/0x9b0 [ 42.510314] ? seq_open+0x360/0x360 [ 42.513916] __vfs_read+0x1a5/0x9b0 [ 42.517547] vfs_read+0x36c/0x6c0 [ 42.520991] SYSC_pread64+0x275/0x310 [ 42.524792] SyS_pread64+0x65/0x90 [ 42.528330] do_syscall_64+0x309/0x430 [ 42.532228] ? SYSC_write+0x360/0x360 [ 42.536054] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.541244] RIP: 0033:0x445569 [ 42.544433] RSP: 002b:00007fa3c1d1bd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 42.552140] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445569 [ 42.559402] RDX: 00000000ffffff72 RSI: 0000000020003c00 RDI: 0000000000000003 [ 42.566652] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 42.573897] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa3c1d1bd20 [ 42.581156] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 42.588421] [ 42.590028] Uninit was stored to memory at: [ 42.594340] kmsan_internal_chain_origin+0x12b/0x210 [ 42.599427] __msan_chain_origin+0x69/0xc0 [ 42.603639] __save_stack_trace+0x829/0xb00 [ 42.607949] save_stack_trace_tsk+0x258/0x2f0 [ 42.612425] proc_pid_stack+0x26a/0x470 [ 42.616375] proc_single_show+0x1af/0x300 [ 42.620497] seq_read+0xc7d/0x2260 [ 42.624033] __vfs_read+0x1a5/0x9b0 [ 42.627642] vfs_read+0x36c/0x6c0 [ 42.631077] SYSC_pread64+0x275/0x310 [ 42.634863] SyS_pread64+0x65/0x90 [ 42.638380] do_syscall_64+0x309/0x430 [ 42.642244] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.647404] Uninit was stored to memory at: [ 42.651705] kmsan_internal_chain_origin+0x12b/0x210 [ 42.656793] __msan_chain_origin+0x69/0xc0 [ 42.661005] update_stack_state+0x959/0xa40 [ 42.665311] unwind_next_frame+0x618/0xe50 [ 42.669522] __save_stack_trace+0x734/0xb00 [ 42.673820] save_stack_trace_tsk+0x258/0x2f0 [ 42.678293] proc_pid_stack+0x26a/0x470 [ 42.682243] proc_single_show+0x1af/0x300 [ 42.686368] seq_read+0xc7d/0x2260 [ 42.689883] __vfs_read+0x1a5/0x9b0 [ 42.693488] vfs_read+0x36c/0x6c0 [ 42.696918] SYSC_pread64+0x275/0x310 [ 42.700695] SyS_pread64+0x65/0x90 [ 42.704214] do_syscall_64+0x309/0x430 [ 42.708082] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.713245] Local variable description: ----flags.i.i.i@rcu_all_qs [ 42.719541] Variable was created at: [ 42.723239] rcu_all_qs+0x32/0x1f0 [ 42.726759] _cond_resched+0x3c/0xd0 [ 42.730455] ================================================================== [ 42.737785] Disabling lock debugging due to kernel taint [ 42.743209] Kernel panic - not syncing: panic_on_warn set ... [ 42.743209] [ 42.750550] CPU: 0 PID: 4513 Comm: syz-executor473 Tainted: G B 4.16.0+ #87 [ 42.758838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.768185] Call Trace: [ 42.770755] dump_stack+0x185/0x1d0 [ 42.774361] panic+0x39d/0x940 [ 42.778134] ? pointer+0x11e5/0x1410 [ 42.781828] kmsan_report+0x238/0x240 [ 42.785606] __msan_warning_32+0x6c/0xb0 [ 42.789650] ? futex_wait_queue_me+0x401/0x710 [ 42.794216] pointer+0x11e5/0x1410 [ 42.797735] ? futex_wait_queue_me+0x476/0x710 [ 42.802294] vsnprintf+0xa2d/0x33c0 [ 42.805902] seq_printf+0x29f/0x420 [ 42.809518] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.814165] ? futex_wait_queue_me+0x476/0x710 [ 42.818727] ? futex_wait_queue_me+0x476/0x710 [ 42.823289] ? futex_wait_queue_me+0x476/0x710 [ 42.827849] proc_pid_stack+0x326/0x470 [ 42.831809] proc_single_show+0x1af/0x300 [ 42.835936] ? proc_pid_wchan+0x250/0x250 [ 42.840070] ? proc_single_open+0x90/0x90 [ 42.844198] seq_read+0xc7d/0x2260 [ 42.847724] ? __vfs_read+0xc9/0x9b0 [ 42.851417] ? seq_open+0x360/0x360 [ 42.855028] __vfs_read+0x1a5/0x9b0 [ 42.858641] vfs_read+0x36c/0x6c0 [ 42.862075] SYSC_pread64+0x275/0x310 [ 42.865857] SyS_pread64+0x65/0x90 [ 42.869374] do_syscall_64+0x309/0x430 [ 42.873242] ? SYSC_write+0x360/0x360 [ 42.877034] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.882211] RIP: 0033:0x445569 [ 42.885377] RSP: 002b:00007fa3c1d1bd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 42.893061] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445569 [ 42.900308] RDX: 00000000ffffff72 RSI: 0000000020003c00 RDI: 0000000000000003 [ 42.907556] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 42.914812] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa3c1d1bd20 [ 42.922084] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 42.929852] Dumping ftrace buffer: [ 42.933370] (ftrace buffer empty) [ 42.937057] Kernel Offset: disabled [ 42.940661] Rebooting in 86400 seconds..