[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 9.461972] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.810746] random: crng init done Warning: Permanently added '10.128.0.59' (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 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 44.804477] ================================================================== [ 44.811857] BUG: KASAN: out-of-bounds in __unwind_start+0x368/0x3b0 [ 44.818243] Read of size 8 at addr ffff8801cb087820 by task syz-executor226/10579 [ 44.825839] [ 44.827444] CPU: 1 PID: 10579 Comm: syz-executor226 Not tainted 4.9.128+ #93 [ 44.834603] ffff8801cb637788 ffffffff81af2469 ffffea00072c21c0 ffff8801cb087820 [ 44.842808] 0000000000000000 ffff8801cb087828 ffff8801cb732f80 ffff8801cb6377c0 [ 44.850927] ffffffff814e13cb ffff8801cb087820 0000000000000008 0000000000000000 [ 44.858927] Call Trace: [ 44.861489] [] dump_stack+0xc1/0x128 [ 44.866835] [] print_address_description+0x6c/0x234 [ 44.873489] [] kasan_report.cold.6+0x242/0x2fe [ 44.879720] [] ? __unwind_start+0x368/0x3b0 [ 44.885665] [] __asan_report_load8_noabort+0x14/0x20 [ 44.892397] [] __unwind_start+0x368/0x3b0 [ 44.898190] [] ? ptrace_may_access+0x24/0x50 [ 44.904245] [] __save_stack_trace+0x59/0xf0 [ 44.910191] [] save_stack_trace_tsk+0x48/0x70 [ 44.916327] [] proc_pid_stack+0x148/0x220 [ 44.922104] [] ? lock_trace+0xc0/0xc0 [ 44.927549] [] ? get_pid_task+0x9b/0x140 [ 44.933235] [] proc_single_show+0xfd/0x170 [ 44.939098] [] seq_read+0x4b6/0x12d0 [ 44.944441] [] ? seq_lseek+0x3c0/0x3c0 [ 44.949971] [] ? __fsnotify_inode_delete+0x30/0x30 [ 44.956527] [] ? __fsnotify_update_child_dentry_flags.part.0+0x300/0x300 [ 44.965005] [] do_loop_readv_writev.part.1+0xd5/0x280 [ 44.971819] [] do_readv_writev+0x56e/0x7b0 [ 44.977689] [] ? vfs_write+0x520/0x520 [ 44.983201] [] ? __this_cpu_preempt_check+0x1c/0x20 [ 44.989839] [] ? check_preemption_disabled+0x3b/0x170 [ 44.996657] [] ? check_preemption_disabled+0x3b/0x170 [ 45.003470] [] ? __fget+0x214/0x3d0 [ 45.008720] [] ? __fget+0x23b/0x3d0 [ 45.013973] [] ? __fget+0x47/0x3d0 [ 45.019146] [] vfs_readv+0x84/0xc0 [ 45.024334] [] do_preadv+0x197/0x240 [ 45.029671] [] ? do_readv+0x260/0x260 [ 45.035101] [] ? __do_page_fault+0x554/0xa60 [ 45.041134] [] SyS_preadv+0x30/0x40 [ 45.046383] [] ? SyS_writev+0x30/0x30 [ 45.051809] [] do_syscall_64+0x19f/0x480 [ 45.057496] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 45.064396] [ 45.065996] The buggy address belongs to the page: [ 45.070898] page:ffffea00072c21c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 45.079135] flags: 0x4000000000000000() [ 45.083079] page dumped because: kasan: bad access detected [ 45.088764] [ 45.090365] Memory state around the buggy address: [ 45.095269] ffff8801cb087700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.102651] ffff8801cb087780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.109993] >ffff8801cb087800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.117374] ^ [ 45.122015] ffff8801cb087880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.129346] ffff8801cb087900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.136674] ================================================================== [ 45.144034] Disabling lock debugging due to kernel taint [ 45.149768] Kernel panic - not syncing: panic_on_warn set ... [ 45.149768] [ 45.157127] CPU: 1 PID: 10579 Comm: syz-executor226 Tainted: G B 4.9.128+ #93 [ 45.165502] ffff8801cb6376e8 ffffffff81af2469 ffffffff82c34968 00000000ffffffff [ 45.173526] 0000000000000000 0000000000000001 ffff8801cb732f80 ffff8801cb6377a8 [ 45.181511] ffffffff813df985 0000000041b58ab3 ffffffff82c2896b ffffffff813df7c6 [ 45.189498] Call Trace: [ 45.192064] [] dump_stack+0xc1/0x128 [ 45.197403] [] panic+0x1bf/0x39f [ 45.202394] [] ? add_taint.cold.6+0x16/0x16 [ 45.208394] [] ? ___preempt_schedule+0x16/0x18 [ 45.214619] [] kasan_end_report+0x47/0x4f [ 45.220408] [] kasan_report.cold.6+0x76/0x2fe [ 45.226530] [] ? __unwind_start+0x368/0x3b0 [ 45.232477] [] __asan_report_load8_noabort+0x14/0x20 [ 45.239207] [] __unwind_start+0x368/0x3b0 [ 45.244983] [] ? ptrace_may_access+0x24/0x50 [ 45.251016] [] __save_stack_trace+0x59/0xf0 [ 45.256962] [] save_stack_trace_tsk+0x48/0x70 [ 45.263082] [] proc_pid_stack+0x148/0x220 [ 45.268862] [] ? lock_trace+0xc0/0xc0 [ 45.274290] [] ? get_pid_task+0x9b/0x140 [ 45.279983] [] proc_single_show+0xfd/0x170 [ 45.285843] [] seq_read+0x4b6/0x12d0 [ 45.291208] [] ? seq_lseek+0x3c0/0x3c0 [ 45.296734] [] ? __fsnotify_inode_delete+0x30/0x30 [ 45.303287] [] ? __fsnotify_update_child_dentry_flags.part.0+0x300/0x300 [ 45.311756] [] do_loop_readv_writev.part.1+0xd5/0x280 [ 45.318570] [] do_readv_writev+0x56e/0x7b0 [ 45.324430] [] ? vfs_write+0x520/0x520 [ 45.329941] [] ? __this_cpu_preempt_check+0x1c/0x20 [ 45.336578] [] ? check_preemption_disabled+0x3b/0x170 [ 45.343405] [] ? check_preemption_disabled+0x3b/0x170 [ 45.350222] [] ? __fget+0x214/0x3d0 [ 45.355472] [] ? __fget+0x23b/0x3d0 [ 45.360733] [] ? __fget+0x47/0x3d0 [ 45.365893] [] vfs_readv+0x84/0xc0 [ 45.371059] [] do_preadv+0x197/0x240 [ 45.376405] [] ? do_readv+0x260/0x260 [ 45.381863] [] ? __do_page_fault+0x554/0xa60 [ 45.387911] [] SyS_preadv+0x30/0x40 [ 45.393160] [] ? SyS_writev+0x30/0x30 [ 45.398584] [] do_syscall_64+0x19f/0x480 [ 45.404276] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 45.411496] Kernel Offset: disabled [ 45.415109] Rebooting in 86400 seconds..