[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 32.441935] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.551166] random: sshd: uninitialized urandom read (32 bytes read) [ 35.010356] random: sshd: uninitialized urandom read (32 bytes read) [ 36.208993] random: sshd: uninitialized urandom read (32 bytes read) [ 36.431316] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.17' (ECDSA) to the list of known hosts. [ 41.951614] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 42.084508] ================================================================== [ 42.091909] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 42.097775] CPU: 0 PID: 4525 Comm: syz-executor552 Not tainted 4.17.0-rc3+ #88 [ 42.105114] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.114448] Call Trace: [ 42.117036] dump_stack+0x185/0x1d0 [ 42.120657] ? pointer+0x11e5/0x1410 [ 42.124361] kmsan_report+0x142/0x240 [ 42.128149] __msan_warning_32+0x6c/0xb0 [ 42.132205] ? futex_wait+0x331/0xc20 [ 42.135985] pointer+0x11e5/0x1410 [ 42.139508] ? futex_wait+0x403/0xc20 [ 42.143291] vsnprintf+0xa2d/0x33c0 [ 42.146914] seq_printf+0x29f/0x420 [ 42.150532] ? futex_wait+0x403/0xc20 [ 42.154311] ? futex_wait+0x403/0xc20 [ 42.158867] ? futex_wait+0x403/0xc20 [ 42.162668] proc_pid_stack+0x326/0x470 [ 42.166639] proc_single_show+0x1af/0x300 [ 42.170767] ? proc_pid_wchan+0x200/0x200 [ 42.174901] ? proc_single_open+0x90/0x90 [ 42.179040] seq_read+0xc7d/0x2260 [ 42.182572] ? __fsnotify_parent+0x75/0x560 [ 42.186875] ? seq_open+0x380/0x380 [ 42.190489] __vfs_read+0x1a5/0x9b0 [ 42.194098] vfs_read+0x36c/0x6c0 [ 42.197540] __x64_sys_pread64+0x2f2/0x390 [ 42.201757] do_syscall_64+0x154/0x220 [ 42.205627] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 42.210797] RIP: 0033:0x445569 [ 42.213965] RSP: 002b:00007f2fcc42cd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 42.221653] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445569 [ 42.228902] RDX: 00000000ffffff72 RSI: 0000000020003c00 RDI: 0000000000000003 [ 42.236153] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 42.243400] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2fcc42cd20 [ 42.250648] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 42.257905] [ 42.259528] Uninit was stored to memory at: [ 42.263862] kmsan_internal_chain_origin+0x12b/0x210 [ 42.268955] __msan_chain_origin+0x69/0xc0 [ 42.273183] __save_stack_trace+0x829/0xb00 [ 42.277507] save_stack_trace_tsk+0x258/0x2f0 [ 42.282005] proc_pid_stack+0x26a/0x470 [ 42.285981] proc_single_show+0x1af/0x300 [ 42.290125] seq_read+0xc7d/0x2260 [ 42.293645] __vfs_read+0x1a5/0x9b0 [ 42.297249] vfs_read+0x36c/0x6c0 [ 42.300680] __x64_sys_pread64+0x2f2/0x390 [ 42.305154] do_syscall_64+0x154/0x220 [ 42.309028] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 42.314205] Uninit was stored to memory at: [ 42.318509] kmsan_internal_chain_origin+0x12b/0x210 [ 42.323591] __msan_chain_origin+0x69/0xc0 [ 42.327811] update_stack_state+0x959/0xa40 [ 42.332122] unwind_next_frame+0x618/0xe50 [ 42.336350] __save_stack_trace+0x734/0xb00 [ 42.340649] save_stack_trace_tsk+0x258/0x2f0 [ 42.345122] proc_pid_stack+0x26a/0x470 [ 42.349075] proc_single_show+0x1af/0x300 [ 42.353201] seq_read+0xc7d/0x2260 [ 42.356719] __vfs_read+0x1a5/0x9b0 [ 42.360340] vfs_read+0x36c/0x6c0 [ 42.363773] __x64_sys_pread64+0x2f2/0x390 [ 42.367988] do_syscall_64+0x154/0x220 [ 42.371860] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 42.377027] Local variable description: ----mmap_event@perf_event_mmap [ 42.383675] Variable was created at: [ 42.387384] perf_event_mmap+0xa5/0x1ec0 [ 42.391425] mmap_region+0x1a98/0x3730 [ 42.395286] ================================================================== [ 42.402620] Disabling lock debugging due to kernel taint [ 42.408054] Kernel panic - not syncing: panic_on_warn set ... [ 42.408054] [ 42.415411] CPU: 0 PID: 4525 Comm: syz-executor552 Tainted: G B 4.17.0-rc3+ #88 [ 42.424136] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.433479] Call Trace: [ 42.436064] dump_stack+0x185/0x1d0 [ 42.439686] panic+0x39d/0x940 [ 42.442876] ? pointer+0x11e5/0x1410 [ 42.446575] kmsan_report+0x238/0x240 [ 42.450366] __msan_warning_32+0x6c/0xb0 [ 42.454409] ? futex_wait+0x331/0xc20 [ 42.458212] pointer+0x11e5/0x1410 [ 42.461744] ? futex_wait+0x403/0xc20 [ 42.465524] vsnprintf+0xa2d/0x33c0 [ 42.469137] seq_printf+0x29f/0x420 [ 42.472752] ? futex_wait+0x403/0xc20 [ 42.476532] ? futex_wait+0x403/0xc20 [ 42.480310] ? futex_wait+0x403/0xc20 [ 42.484099] proc_pid_stack+0x326/0x470 [ 42.488064] proc_single_show+0x1af/0x300 [ 42.492201] ? proc_pid_wchan+0x200/0x200 [ 42.496327] ? proc_single_open+0x90/0x90 [ 42.500461] seq_read+0xc7d/0x2260 [ 42.503983] ? __fsnotify_parent+0x75/0x560 [ 42.508288] ? seq_open+0x380/0x380 [ 42.511904] __vfs_read+0x1a5/0x9b0 [ 42.515517] vfs_read+0x36c/0x6c0 [ 42.518952] __x64_sys_pread64+0x2f2/0x390 [ 42.523182] do_syscall_64+0x154/0x220 [ 42.527066] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 42.532236] RIP: 0033:0x445569 [ 42.535406] RSP: 002b:00007f2fcc42cd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 42.543092] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445569 [ 42.550348] RDX: 00000000ffffff72 RSI: 0000000020003c00 RDI: 0000000000000003 [ 42.557607] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 42.564858] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2fcc42cd20 [ 42.572113] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 42.579908] Dumping ftrace buffer: [ 42.583427] (ftrace buffer empty) [ 42.587113] Kernel Offset: disabled [ 42.590718] Rebooting in 86400 seconds..