================================================================== BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:38 Read of size 8 at addr ffff88801b8d13d8 by task syz-executor411/8507 CPU: 1 PID: 8507 Comm: syz-executor411 Not tainted 5.10.0-rc2-syzkaller #0 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+0x107/0x163 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562 squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:38 squashfs_new_inode fs/squashfs/inode.c:51 [inline] squashfs_read_inode+0x1b4/0x1b40 fs/squashfs/inode.c:120 squashfs_fill_super+0x1140/0x23b0 fs/squashfs/super.c:310 get_tree_bdev+0x421/0x740 fs/super.c:1344 vfs_get_tree+0x89/0x2f0 fs/super.c:1549 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x13ad/0x20c0 fs/namespace.c:3205 do_mount fs/namespace.c:3218 [inline] __do_sys_mount fs/namespace.c:3426 [inline] __se_sys_mount fs/namespace.c:3403 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3403 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446d4a Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fff93b307e8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fff93b30840 RCX: 0000000000446d4a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff93b30800 RBP: 00007fff93b30800 R08: 00007fff93b30840 R09: 00007fff00000015 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Allocated by task 6509: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461 __do_kmalloc mm/slab.c:3657 [inline] __kmalloc_track_caller+0x23b/0x490 mm/slab.c:3672 kstrdup+0x36/0x70 mm/util.c:60 simple_xattr_set+0x93/0x6e0 fs/xattr.c:985 __vfs_setxattr+0x10e/0x170 fs/xattr.c:177 __vfs_setxattr_noperm+0x11a/0x4c0 fs/xattr.c:208 __vfs_setxattr_locked+0x1bf/0x250 fs/xattr.c:266 vfs_setxattr+0xe5/0x270 fs/xattr.c:283 setxattr+0x23d/0x330 fs/xattr.c:548 path_setxattr+0x170/0x190 fs/xattr.c:567 __do_sys_lsetxattr fs/xattr.c:589 [inline] __se_sys_lsetxattr fs/xattr.c:585 [inline] __x64_sys_lsetxattr+0xbd/0x150 fs/xattr.c:585 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88801b8d13c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff88801b8d13c0, ffff88801b8d13e0) The buggy address belongs to the page: page:00000000d747b1b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801b8d1fc1 pfn:0x1b8d1 flags: 0xfff00000000200(slab) raw: 00fff00000000200 ffffea0000699dc8 ffffea000069ec88 ffff888010040100 raw: ffff88801b8d1fc1 ffff88801b8d1000 000000010000001c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801b8d1280: fb fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc ffff88801b8d1300: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc >ffff88801b8d1380: 00 00 01 fc fc fc fc fc 00 00 01 fc fc fc fc fc ^ ffff88801b8d1400: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88801b8d1480: fa fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================