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 '10.128.0.61' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.337922] ================================================================== [ 42.345304] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 42.351164] CPU: 1 PID: 4508 Comm: syz-executor175 Not tainted 4.16.0+ #87 [ 42.358161] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.367490] Call Trace: [ 42.370058] dump_stack+0x185/0x1d0 [ 42.373661] ? pointer+0x11e5/0x1410 [ 42.377351] kmsan_report+0x142/0x240 [ 42.381138] __msan_warning_32+0x6c/0xb0 [ 42.385179] ? proc_single_show+0x191/0x300 [ 42.389475] pointer+0x11e5/0x1410 [ 42.392992] ? proc_single_show+0x1af/0x300 [ 42.397294] vsnprintf+0xa2d/0x33c0 [ 42.400904] seq_printf+0x29f/0x420 [ 42.404517] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.409166] ? proc_single_show+0x1af/0x300 [ 42.413479] ? proc_single_show+0x1af/0x300 [ 42.417781] ? proc_single_show+0x1af/0x300 [ 42.422080] proc_pid_stack+0x326/0x470 [ 42.426033] proc_single_show+0x1af/0x300 [ 42.430159] ? proc_pid_wchan+0x250/0x250 [ 42.434286] ? proc_single_open+0x90/0x90 [ 42.438407] seq_read+0xc7d/0x2260 [ 42.441928] ? __vfs_read+0xc9/0x9b0 [ 42.445616] ? seq_open+0x360/0x360 [ 42.449220] __vfs_read+0x1a5/0x9b0 [ 42.452835] vfs_read+0x36c/0x6c0 [ 42.456270] SYSC_pread64+0x275/0x310 [ 42.460049] SyS_pread64+0x65/0x90 [ 42.463568] do_syscall_64+0x309/0x430 [ 42.467433] ? SYSC_write+0x360/0x360 [ 42.471219] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.476385] RIP: 0033:0x440089 [ 42.479555] RSP: 002b:00007ffc3f368c88 EFLAGS: 00000213 ORIG_RAX: 0000000000000011 [ 42.487245] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 42.494498] RDX: 0000000000000352 RSI: 00000000209f3000 RDI: 0000000000000003 [ 42.501742] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.508995] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 42.516254] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 42.523503] [ 42.525107] Uninit was stored to memory at: [ 42.529414] kmsan_internal_chain_origin+0x12b/0x210 [ 42.534491] __msan_chain_origin+0x69/0xc0 [ 42.538704] __save_stack_trace+0x829/0xb00 [ 42.543004] save_stack_trace_tsk+0x258/0x2f0 [ 42.547485] proc_pid_stack+0x26a/0x470 [ 42.551436] proc_single_show+0x1af/0x300 [ 42.555559] seq_read+0xc7d/0x2260 [ 42.559089] __vfs_read+0x1a5/0x9b0 [ 42.562691] vfs_read+0x36c/0x6c0 [ 42.566121] SYSC_pread64+0x275/0x310 [ 42.569897] SyS_pread64+0x65/0x90 [ 42.573413] do_syscall_64+0x309/0x430 [ 42.577279] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.582438] Uninit was stored to memory at: [ 42.586744] kmsan_internal_chain_origin+0x12b/0x210 [ 42.591823] __msan_chain_origin+0x69/0xc0 [ 42.596034] update_stack_state+0x959/0xa40 [ 42.600333] unwind_next_frame+0x618/0xe50 [ 42.604550] __save_stack_trace+0x734/0xb00 [ 42.608847] save_stack_trace_tsk+0x258/0x2f0 [ 42.613319] proc_pid_stack+0x26a/0x470 [ 42.617271] proc_single_show+0x1af/0x300 [ 42.621393] seq_read+0xc7d/0x2260 [ 42.624911] __vfs_read+0x1a5/0x9b0 [ 42.628515] vfs_read+0x36c/0x6c0 [ 42.631943] SYSC_pread64+0x275/0x310 [ 42.635718] SyS_pread64+0x65/0x90 [ 42.639233] do_syscall_64+0x309/0x430 [ 42.643096] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.648258] Local variable description: ----fl.i@locks_remove_file [ 42.654548] Variable was created at: [ 42.658239] locks_remove_file+0x65/0x1d70 [ 42.662450] __fput+0x3c4/0xa10 [ 42.665697] ================================================================== [ 42.673033] Disabling lock debugging due to kernel taint [ 42.678469] Kernel panic - not syncing: panic_on_warn set ... [ 42.678469] [ 42.685813] CPU: 1 PID: 4508 Comm: syz-executor175 Tainted: G B 4.16.0+ #87 [ 42.694100] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.703428] Call Trace: [ 42.705996] dump_stack+0x185/0x1d0 [ 42.709602] panic+0x39d/0x940 [ 42.712781] ? pointer+0x11e5/0x1410 [ 42.716470] kmsan_report+0x238/0x240 [ 42.720249] __msan_warning_32+0x6c/0xb0 [ 42.724291] ? proc_single_show+0x191/0x300 [ 42.728586] pointer+0x11e5/0x1410 [ 42.732102] ? proc_single_show+0x1af/0x300 [ 42.736400] vsnprintf+0xa2d/0x33c0 [ 42.740005] seq_printf+0x29f/0x420 [ 42.743618] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.748268] ? proc_single_show+0x1af/0x300 [ 42.752567] ? proc_single_show+0x1af/0x300 [ 42.756866] ? proc_single_show+0x1af/0x300 [ 42.761165] proc_pid_stack+0x326/0x470 [ 42.765135] proc_single_show+0x1af/0x300 [ 42.769271] ? proc_pid_wchan+0x250/0x250 [ 42.773400] ? proc_single_open+0x90/0x90 [ 42.777539] seq_read+0xc7d/0x2260 [ 42.781074] ? __vfs_read+0xc9/0x9b0 [ 42.784772] ? seq_open+0x360/0x360 [ 42.788381] __vfs_read+0x1a5/0x9b0 [ 42.791988] vfs_read+0x36c/0x6c0 [ 42.795424] SYSC_pread64+0x275/0x310 [ 42.799204] SyS_pread64+0x65/0x90 [ 42.802725] do_syscall_64+0x309/0x430 [ 42.806597] ? SYSC_write+0x360/0x360 [ 42.810389] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.815556] RIP: 0033:0x440089 [ 42.818726] RSP: 002b:00007ffc3f368c88 EFLAGS: 00000213 ORIG_RAX: 0000000000000011 [ 42.826411] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 42.833659] RDX: 0000000000000352 RSI: 00000000209f3000 RDI: 0000000000000003 [ 42.840916] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.848160] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 42.855408] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 42.863307] Dumping ftrace buffer: [ 42.866826] (ftrace buffer empty) [ 42.870510] Kernel Offset: disabled [ 42.874110] Rebooting in 86400 seconds..