[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 10.345112] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.462903] random: crng init done Warning: Permanently added '10.128.0.105' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.061951] ================================================================== [ 63.069339] BUG: KASAN: out-of-bounds in __unwind_start+0x368/0x3b0 [ 63.075720] Read of size 8 at addr ffff8801c6c1f808 by task syz-executor613/6084 [ 63.083229] [ 63.084852] CPU: 0 PID: 6084 Comm: syz-executor613 Not tainted 4.9.128+ #45 [ 63.091924] ffff8801c6c37690 ffffffff81af2469 ffffea00071b07c0 ffff8801c6c1f808 [ 63.099935] 0000000000000000 ffff8801c6c1f810 ffff8801c6c9af80 ffff8801c6c376c8 [ 63.107944] ffffffff814e13cb ffff8801c6c1f808 0000000000000008 0000000000000000 [ 63.115949] Call Trace: [ 63.118514] [] dump_stack+0xc1/0x128 [ 63.123864] [] print_address_description+0x6c/0x234 [ 63.130513] [] kasan_report.cold.6+0x242/0x2fe [ 63.136721] [] ? __unwind_start+0x368/0x3b0 [ 63.142669] [] __asan_report_load8_noabort+0x14/0x20 [ 63.149399] [] __unwind_start+0x368/0x3b0 [ 63.155190] [] ? ptrace_may_access+0x24/0x50 [ 63.161226] [] __save_stack_trace+0x59/0xf0 [ 63.167175] [] save_stack_trace_tsk+0x48/0x70 [ 63.173297] [] proc_pid_stack+0x148/0x220 [ 63.179069] [] ? lock_trace+0xc0/0xc0 [ 63.184494] [] ? get_pid_task+0x9b/0x140 [ 63.190181] [] proc_single_show+0xfd/0x170 [ 63.196039] [] traverse+0x363/0x920 [ 63.201300] [] ? seq_buf_alloc+0x80/0x80 [ 63.207001] [] ? get_page_from_freelist+0xae0/0x18e0 [ 63.213728] [] ? kasan_unpoison_shadow+0x35/0x50 [ 63.220116] [] seq_read+0xd1b/0x12d0 [ 63.225465] [] ? seq_lseek+0x3c0/0x3c0 [ 63.230980] [] ? __fsnotify_inode_delete+0x30/0x30 [ 63.237536] [] ? __fsnotify_update_child_dentry_flags.part.0+0x300/0x300 [ 63.245999] [] do_loop_readv_writev.part.1+0xd5/0x280 [ 63.252818] [] compat_do_readv_writev+0x570/0x7b0 [ 63.259291] [] ? check_preemption_disabled+0x3b/0x170 [ 63.266134] [] ? do_pwritev+0x240/0x240 [ 63.271733] [] ? __lru_cache_add+0x187/0x250 [ 63.277765] [] ? __this_cpu_preempt_check+0x1c/0x20 [ 63.284414] [] ? check_preemption_disabled+0x3b/0x170 [ 63.291231] [] ? check_preemption_disabled+0x3b/0x170 [ 63.298044] [] ? __fget+0x214/0x3d0 [ 63.303295] [] ? __fget+0x23b/0x3d0 [ 63.308719] [] ? __fget+0x47/0x3d0 [ 63.313885] [] compat_readv+0xe2/0x150 [ 63.319397] [] do_compat_preadv64+0x152/0x180 [ 63.325525] [] ? do_compat_readv+0x1d0/0x1d0 [ 63.331561] [] ? up_read+0x1a/0x40 [ 63.336726] [] ? __do_page_fault+0x554/0xa60 [ 63.342760] [] ? compat_SyS_vmsplice+0x160/0x160 [ 63.349139] [] compat_SyS_preadv+0x3b/0x50 [ 63.354997] [] ? compat_SyS_preadv64+0x40/0x40 [ 63.361207] [] do_fast_syscall_32+0x2f1/0x860 [ 63.367350] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 63.373991] [] entry_SYSENTER_compat+0x90/0xa2 [ 63.380196] [ 63.381795] The buggy address belongs to the page: [ 63.386700] page:ffffea00071b07c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 63.394935] flags: 0x4000000000000000() [ 63.398880] page dumped because: kasan: bad access detected [ 63.404561] [ 63.406161] Memory state around the buggy address: [ 63.411072] ffff8801c6c1f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.418419] ffff8801c6c1f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.425749] >ffff8801c6c1f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.433084] ^ [ 63.436958] ffff8801c6c1f880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.444291] ffff8801c6c1f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.451621] ================================================================== [ 63.458952] Disabling lock debugging due to kernel taint [ 63.466346] Kernel panic - not syncing: panic_on_warn set ... [ 63.466346] [ 63.473702] CPU: 0 PID: 6084 Comm: syz-executor613 Tainted: G B 4.9.128+ #45 [ 63.481992] ffff8801c6c375f0 ffffffff81af2469 ffffffff82c34968 00000000ffffffff [ 63.489984] 0000000000000000 0000000000000000 ffff8801c6c9af80 ffff8801c6c376b0 [ 63.497969] ffffffff813df985 0000000041b58ab3 ffffffff82c2896b ffffffff813df7c6 [ 63.505968] Call Trace: [ 63.508535] [] dump_stack+0xc1/0x128 [ 63.513873] [] panic+0x1bf/0x39f [ 63.518874] [] ? add_taint.cold.6+0x16/0x16 [ 63.524828] [] ? ___preempt_schedule+0x16/0x18 [ 63.531066] [] kasan_end_report+0x47/0x4f [ 63.536849] [] kasan_report.cold.6+0x76/0x2fe [ 63.542969] [] ? __unwind_start+0x368/0x3b0 [ 63.548915] [] __asan_report_load8_noabort+0x14/0x20 [ 63.555658] [] __unwind_start+0x368/0x3b0 [ 63.561437] [] ? ptrace_may_access+0x24/0x50 [ 63.567476] [] __save_stack_trace+0x59/0xf0 [ 63.573437] [] save_stack_trace_tsk+0x48/0x70 [ 63.579558] [] proc_pid_stack+0x148/0x220 [ 63.585349] [] ? lock_trace+0xc0/0xc0 [ 63.590777] [] ? get_pid_task+0x9b/0x140 [ 63.596461] [] proc_single_show+0xfd/0x170 [ 63.602318] [] traverse+0x363/0x920 [ 63.607584] [] ? seq_buf_alloc+0x80/0x80 [ 63.613273] [] ? get_page_from_freelist+0xae0/0x18e0 [ 63.620003] [] ? kasan_unpoison_shadow+0x35/0x50 [ 63.626418] [] seq_read+0xd1b/0x12d0 [ 63.631761] [] ? seq_lseek+0x3c0/0x3c0 [ 63.637278] [] ? __fsnotify_inode_delete+0x30/0x30 [ 63.643856] [] ? __fsnotify_update_child_dentry_flags.part.0+0x300/0x300 [ 63.652322] [] do_loop_readv_writev.part.1+0xd5/0x280 [ 63.659140] [] compat_do_readv_writev+0x570/0x7b0 [ 63.665608] [] ? check_preemption_disabled+0x3b/0x170 [ 63.672420] [] ? do_pwritev+0x240/0x240 [ 63.678021] [] ? __lru_cache_add+0x187/0x250 [ 63.684059] [] ? __this_cpu_preempt_check+0x1c/0x20 [ 63.690698] [] ? check_preemption_disabled+0x3b/0x170 [ 63.697518] [] ? check_preemption_disabled+0x3b/0x170 [ 63.704331] [] ? __fget+0x214/0x3d0 [ 63.709583] [] ? __fget+0x23b/0x3d0 [ 63.714860] [] ? __fget+0x47/0x3d0 [ 63.720025] [] compat_readv+0xe2/0x150 [ 63.725623] [] do_compat_preadv64+0x152/0x180 [ 63.731741] [] ? do_compat_readv+0x1d0/0x1d0 [ 63.737775] [] ? up_read+0x1a/0x40 [ 63.742944] [] ? __do_page_fault+0x554/0xa60 [ 63.748992] [] ? compat_SyS_vmsplice+0x160/0x160 [ 63.755375] [] compat_SyS_preadv+0x3b/0x50 [ 63.761236] [] ? compat_SyS_preadv64+0x40/0x40 [ 63.767441] [] do_fast_syscall_32+0x2f1/0x860 [ 63.773575] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 63.780216] [] entry_SYSENTER_compat+0x90/0xa2 [ 63.786763] Kernel Offset: disabled [ 63.790372] Rebooting in 86400 seconds..