[ OK ] Found device /dev/ttyS0. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.230' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.020610] divide error: 0000 [#1] PREEMPT SMP KASAN [ 28.025937] Modules linked in: [ 28.029162] CPU: 0 PID: 7982 Comm: syz-executor083 Not tainted 4.14.209-syzkaller #0 [ 28.037028] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.046374] task: ffff8880b5300000 task.stack: ffff888096358000 [ 28.052416] RIP: 0010:squashfs_readpage+0x7a0/0x1d5d [ 28.057492] RSP: 0018:ffff88809635f798 EFLAGS: 00010246 [ 28.062829] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 28.070075] RDX: 0000000000000000 RSI: ffffea0002400680 RDI: ffff88808df9a4f8 [ 28.077323] RBP: 0000000000000099 R08: 0000000000000000 R09: 0000000000000000 [ 28.084574] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000de [ 28.098949] R13: ffff88808df9a548 R14: ffffea0002400690 R15: ffffea0002400688 [ 28.106194] FS: 0000000000ed8880(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.114408] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.120283] CR2: 000055fe05c98020 CR3: 00000000b5384000 CR4: 00000000001406f0 [ 28.127547] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.134791] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.142035] Call Trace: [ 28.144601] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.149593] ? __add_to_page_cache_locked+0x2ea/0x840 [ 28.154757] ? check_preemption_disabled+0x35/0x240 [ 28.159750] ? __lru_cache_add+0x178/0x250 [ 28.163958] ? squashfs_copy_cache+0x5b0/0x5b0 [ 28.168516] ? add_to_page_cache_locked+0x40/0x40 [ 28.173332] __do_page_cache_readahead+0x69b/0x940 [ 28.178244] ? read_cache_pages+0x6a0/0x6a0 [ 28.182543] ondemand_readahead.isra.0+0x514/0xb60 [ 28.187477] page_cache_sync_readahead+0xa6/0xf0 [ 28.192226] generic_file_read_iter+0xfbc/0x21c0 [ 28.196959] ? iov_iter_init+0xa6/0x1c0 [ 28.200910] __vfs_read+0x449/0x620 [ 28.204635] ? vfs_copy_file_range+0x9b0/0x9b0 [ 28.209207] ? rw_verify_area+0xe1/0x2a0 [ 28.213246] vfs_read+0x139/0x340 [ 28.216695] kernel_read+0xa6/0x110 [ 28.220305] prepare_binprm+0x5b8/0x7e0 [ 28.224259] ? install_exec_creds+0x160/0x160 [ 28.228730] do_execveat_common+0xd72/0x1f30 [ 28.233119] ? copy_strings_kernel+0x110/0x110 [ 28.237679] ? strncpy_from_user+0x210/0x2c0 [ 28.242060] ? getname_flags+0x22e/0x550 [ 28.246094] SyS_execveat+0x51/0x70 [ 28.249698] ? SyS_execve+0x50/0x50 [ 28.253310] do_syscall_64+0x1d5/0x640 [ 28.257207] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.262514] RIP: 0033:0x4443c9 [ 28.265695] RSP: 002b:00007fffaa0dde68 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 [ 28.273389] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004443c9 [ 28.280640] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000005 [ 28.287909] RBP: 00000000006cf018 R08: 0000000000000000 R09: 00000000004002e0 [ 28.295158] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401fb0 [ 28.302414] R13: 0000000000402040 R14: 0000000000000000 R15: 0000000000000000 [ 28.309669] Code: 89 a4 24 d0 00 00 00 80 3c 02 00 0f 85 77 15 00 00 48 63 8c 24 94 00 00 00 31 d2 48 63 44 24 50 48 8b 3c 24 48 89 cb 48 c1 e1 0b <48> f7 f1 c1 e3 0b 85 c0 48 89 44 24 60 4c 8b 6f c8 89 44 24 38 [ 28.328743] RIP: squashfs_readpage+0x7a0/0x1d5d RSP: ffff88809635f798 [ 28.336112] ---[ end trace 97236d6cdc65c556 ]--- [ 28.340917] Kernel panic - not syncing: Fatal exception [ 28.346966] Kernel Offset: disabled [ 28.350580] Rebooting in 86400 seconds..