================================================================== BUG: KASAN: global-out-of-bounds in strscpy+0x20e/0x2c0 lib/string.c:206 Read of size 8 at addr ffffffff8677b2a0 by task syz-executor.5/31339 CPU: 1 PID: 31339 Comm: syz-executor.5 Not tainted 4.14.113 #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 print_address_description.cold+0x5/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xaf/0x2b5 mm/kasan/report.c:393 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430 strscpy+0x20e/0x2c0 lib/string.c:206 prepare_error_buf+0x94/0x1aa0 fs/reiserfs/prints.c:213 __reiserfs_warning+0x9f/0xb0 fs/reiserfs/prints.c:288 reiserfs_getopt fs/reiserfs/super.c:1063 [inline] reiserfs_parse_options+0x153e/0x1820 fs/reiserfs/super.c:1194 reiserfs_fill_super+0x461/0x2b20 fs/reiserfs/super.c:1946 mount_bdev+0x2c1/0x370 fs/super.c:1134 get_super_block+0x35/0x40 fs/reiserfs/super.c:2605 mount_fs+0x9d/0x2a7 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 kobject: 'kvm' (ffff8880a6de4a90): fill_kobj_path: path = '/devices/virtual/misc/kvm' SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 kobject: 'kvm' (ffff8880a6de4a90): kobject_uevent_env kobject: 'kvm' (ffff8880a6de4a90): fill_kobj_path: path = '/devices/virtual/misc/kvm' entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45b69a RSP: 002b:00007f3130aaca88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3130aacb40 RCX: 000000000045b69a kobject: 'kvm' (ffff8880a6de4a90): kobject_uevent_env RDX: 00007f3130aacae0 RSI: 0000000020000040 RDI: 00007f3130aacb00 RBP: 0000000000000000 R08: 00007f3130aacb40 R09: 00007f3130aacae0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003 R13: 00000000004c782d R14: 00000000004dd880 R15: 00000000ffffffff The buggy address belongs to the variable: __func__.31266+0x980/0x3a60 kobject: 'kvm' (ffff8880a6de4a90): fill_kobj_path: path = '/devices/virtual/misc/kvm' Memory state around the buggy address: ffffffff8677b180: fa fa fa fa 00 03 fa fa fa fa fa fa 00 00 00 00 ffffffff8677b200: 00 06 fa fa fa fa fa fa 00 03 fa fa fa fa fa fa >ffffffff8677b280: 00 00 00 00 06 fa fa fa fa fa fa fa 00 03 fa fa ^ ffffffff8677b300: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa ffffffff8677b380: 00 03 fa fa fa fa fa fa 00 00 00 01 fa fa fa fa ==================================================================