================================================================== BUG: KASAN: global-out-of-bounds in strscpy+0x20e/0x2c0 lib/string.c:206 Read of size 8 at addr ffffffff8677e1f8 by task syz-executor.3/7438 CPU: 0 PID: 7438 Comm: syz-executor.3 Not tainted 4.14.134 #30 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+0xa9/0x2af 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_fill_super+0xa71/0x2b20 fs/reiserfs/super.c:1980 mount_bdev+0x2be/0x370 fs/super.c:1134 get_super_block+0x35/0x40 fs/reiserfs/super.c:2605 mount_fs+0x97/0x2a1 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 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c27a RSP: 002b:00007f8e88c5ba88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f8e88c5bb40 RCX: 000000000045c27a RDX: 00007f8e88c5bae0 RSI: 00000000200000c0 RDI: 00007f8e88c5bb00 RBP: 0000000000000000 R08: 00007f8e88c5bb40 R09: 00007f8e88c5bae0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003 R13: 00000000004c8a7f R14: 00000000004df8b8 R15: 00000000ffffffff The buggy address belongs to the variable: __func__.31301+0x2dd8/0x3a60 Memory state around the buggy address: ffffffff8677e080: 01 fa fa fa fa fa fa fa 01 fa fa fa fa fa fa fa ffffffff8677e100: 00 00 00 00 00 07 fa fa fa fa fa fa 00 00 00 07 >ffffffff8677e180: fa fa fa fa 00 fa fa fa fa fa fa fa 00 00 00 04 ^ ffffffff8677e200: fa fa fa fa 00 fa fa fa fa fa fa fa 00 00 00 00 ffffffff8677e280: 00 00 00 00 02 fa fa fa fa fa fa fa 00 00 00 00 ==================================================================