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 '10.128.0.21' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.245778] ================================================================== [ 45.253186] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 45.259059] CPU: 0 PID: 4512 Comm: syzkaller537342 Not tainted 4.16.0+ #87 [ 45.266055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.275385] Call Trace: [ 45.277958] dump_stack+0x185/0x1d0 [ 45.281565] ? pointer+0x11e5/0x1410 [ 45.285256] kmsan_report+0x142/0x240 [ 45.289049] __msan_warning_32+0x6c/0xb0 [ 45.293098] ? futex_wait_queue_me+0x401/0x710 [ 45.297658] pointer+0x11e5/0x1410 [ 45.301179] ? futex_wait_queue_me+0x476/0x710 [ 45.305736] vsnprintf+0xa2d/0x33c0 [ 45.309362] seq_printf+0x29f/0x420 [ 45.312976] ? save_stack_trace_tsk+0x26a/0x2f0 [ 45.317627] ? futex_wait_queue_me+0x476/0x710 [ 45.322186] ? futex_wait_queue_me+0x476/0x710 [ 45.326743] ? futex_wait_queue_me+0x476/0x710 [ 45.331304] proc_pid_stack+0x326/0x470 [ 45.335258] proc_single_show+0x1af/0x300 [ 45.339384] ? proc_pid_wchan+0x250/0x250 [ 45.343507] ? proc_single_open+0x90/0x90 [ 45.347978] seq_read+0xc7d/0x2260 [ 45.351499] ? __vfs_read+0xc9/0x9b0 [ 45.355188] ? seq_open+0x360/0x360 [ 45.358808] __vfs_read+0x1a5/0x9b0 [ 45.362444] vfs_read+0x36c/0x6c0 [ 45.365878] SYSC_pread64+0x275/0x310 [ 45.369657] SyS_pread64+0x65/0x90 [ 45.373177] do_syscall_64+0x309/0x430 [ 45.377046] ? SYSC_write+0x360/0x360 [ 45.380842] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 45.386447] RIP: 0033:0x445569 [ 45.389611] RSP: 002b:00007f71608f5d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 45.397292] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445569 [ 45.404542] RDX: 0000000000000398 RSI: 0000000020fd7000 RDI: 0000000000000003 [ 45.411799] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 45.419046] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f71608f5d20 [ 45.426299] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 45.433546] [ 45.435146] Uninit was stored to memory at: [ 45.439446] kmsan_internal_chain_origin+0x12b/0x210 [ 45.444523] __msan_chain_origin+0x69/0xc0 [ 45.448734] __save_stack_trace+0x829/0xb00 [ 45.453042] save_stack_trace_tsk+0x258/0x2f0 [ 45.457516] proc_pid_stack+0x26a/0x470 [ 45.461638] proc_single_show+0x1af/0x300 [ 45.465759] seq_read+0xc7d/0x2260 [ 45.469276] __vfs_read+0x1a5/0x9b0 [ 45.472880] vfs_read+0x36c/0x6c0 [ 45.476307] SYSC_pread64+0x275/0x310 [ 45.480085] SyS_pread64+0x65/0x90 [ 45.483599] do_syscall_64+0x309/0x430 [ 45.487460] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 45.492618] Uninit was stored to memory at: [ 45.496915] kmsan_internal_chain_origin+0x12b/0x210 [ 45.501992] __msan_chain_origin+0x69/0xc0 [ 45.506205] update_stack_state+0x959/0xa40 [ 45.510515] unwind_next_frame+0x618/0xe50 [ 45.514726] __save_stack_trace+0x734/0xb00 [ 45.519034] save_stack_trace_tsk+0x258/0x2f0 [ 45.523509] proc_pid_stack+0x26a/0x470 [ 45.527461] proc_single_show+0x1af/0x300 [ 45.531589] seq_read+0xc7d/0x2260 [ 45.535119] __vfs_read+0x1a5/0x9b0 [ 45.538721] vfs_read+0x36c/0x6c0 [ 45.542150] SYSC_pread64+0x275/0x310 [ 45.545928] SyS_pread64+0x65/0x90 [ 45.549446] do_syscall_64+0x309/0x430 [ 45.553310] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 45.558473] Local variable description: ----flags.i.i.i@rcu_all_qs [ 45.564766] Variable was created at: [ 45.568468] rcu_all_qs+0x32/0x1f0 [ 45.571985] _cond_resched+0x3c/0xd0 [ 45.575668] ================================================================== [ 45.582999] Disabling lock debugging due to kernel taint [ 45.588438] Kernel panic - not syncing: panic_on_warn set ... [ 45.588438] [ 45.595783] CPU: 0 PID: 4512 Comm: syzkaller537342 Tainted: G B 4.16.0+ #87 [ 45.604110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.613442] Call Trace: [ 45.616019] dump_stack+0x185/0x1d0 [ 45.619634] panic+0x39d/0x940 [ 45.622811] ? pointer+0x11e5/0x1410 [ 45.626501] kmsan_report+0x238/0x240 [ 45.630277] __msan_warning_32+0x6c/0xb0 [ 45.634316] ? futex_wait_queue_me+0x401/0x710 [ 45.638872] pointer+0x11e5/0x1410 [ 45.642405] ? futex_wait_queue_me+0x476/0x710 [ 45.646965] vsnprintf+0xa2d/0x33c0 [ 45.650572] seq_printf+0x29f/0x420 [ 45.654196] ? save_stack_trace_tsk+0x26a/0x2f0 [ 45.658842] ? futex_wait_queue_me+0x476/0x710 [ 45.663404] ? futex_wait_queue_me+0x476/0x710 [ 45.667968] ? futex_wait_queue_me+0x476/0x710 [ 45.672536] proc_pid_stack+0x326/0x470 [ 45.676490] proc_single_show+0x1af/0x300 [ 45.680615] ? proc_pid_wchan+0x250/0x250 [ 45.684738] ? proc_single_open+0x90/0x90 [ 45.688859] seq_read+0xc7d/0x2260 [ 45.692387] ? __vfs_read+0xc9/0x9b0 [ 45.696082] ? seq_open+0x360/0x360 [ 45.699685] __vfs_read+0x1a5/0x9b0 [ 45.703303] vfs_read+0x36c/0x6c0 [ 45.706736] SYSC_pread64+0x275/0x310 [ 45.710514] SyS_pread64+0x65/0x90 [ 45.714037] do_syscall_64+0x309/0x430 [ 45.717905] ? SYSC_write+0x360/0x360 [ 45.721682] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 45.726845] RIP: 0033:0x445569 [ 45.730013] RSP: 002b:00007f71608f5d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 45.737706] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445569 [ 45.744950] RDX: 0000000000000398 RSI: 0000000020fd7000 RDI: 0000000000000003 [ 45.752199] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 45.759444] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f71608f5d20 [ 45.766689] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 45.774438] Dumping ftrace buffer: [ 45.777954] (ftrace buffer empty) [ 45.781636] Kernel Offset: disabled [ 45.785238] Rebooting in 86400 seconds..