================================================================== BUG: KASAN: slab-out-of-bounds in strlen+0x79/0x90 lib/string.c:525 Read of size 1 at addr ffff8881ca08deb8 by task syz-executor.5/3068 CPU: 1 PID: 3068 Comm: syz-executor.5 Not tainted 5.3.0-rc5+ #28 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x6a/0x32c mm/kasan/report.c:351 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:612 strlen+0x79/0x90 lib/string.c:525 strlen include/linux/string.h:281 [inline] hidraw_ioctl+0x62b/0xae0 drivers/hid/hidraw.c:437 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459879 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa234d83c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879 RDX: 0000000020000080 RSI: 0000000080404804 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa234d846d4 R13: 00000000004c2229 R14: 00000000004d56c8 R15: 00000000ffffffff Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8881ca08db00 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 952 bytes inside of 1024-byte region [ffff8881ca08db00, ffff8881ca08df00) The buggy address belongs to the page: page:ffffea0007282300 refcount:1 mapcount:0 mapping:ffff8881da002280 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da002280 raw: 0000000000000000 00000000800e000e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ca08dd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881ca08de00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881ca08de80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881ca08df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881ca08df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================