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BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0xb9/0x1c0 fs/squashfs/id.c:38
Read of size 8 at addr ffff8880138cd900 by task syz-executor.1/13123

CPU: 1 PID: 13123 Comm: syz-executor.1 Not tainted 5.10.0-rc4-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+0x137/0x1be lib/dump_stack.c:118
 print_address_description+0x6c/0x660 mm/kasan/report.c:385
 __kasan_report mm/kasan/report.c:545 [inline]
 kasan_report+0x136/0x1e0 mm/kasan/report.c:562
 squashfs_get_id+0xb9/0x1c0 fs/squashfs/id.c:38
 squashfs_new_inode fs/squashfs/inode.c:55 [inline]
 squashfs_read_inode+0x1ea/0x2690 fs/squashfs/inode.c:120
 squashfs_fill_super+0x1665/0x1c90 fs/squashfs/super.c:310
 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1344
 vfs_get_tree+0x88/0x270 fs/super.c:1549
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x17b4/0x2a20 fs/namespace.c:3205
 do_mount fs/namespace.c:3218 [inline]
 __do_sys_mount fs/namespace.c:3426 [inline]
 __se_sys_mount+0x28c/0x320 fs/namespace.c:3403
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x46090a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 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 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f0700334a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0700334b20 RCX: 000000000046090a
RDX: 0000000020000280 RSI: 0000000020000100 RDI: 00007f0700334ae0
RBP: 00007f0700334ae0 R08: 00007f0700334b20 R09: 0000000020000280
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000280
R13: 0000000020000100 R14: 0000000020000340 R15: 0000000020010200

Allocated by task 13123:
 kasan_save_stack mm/kasan/common.c:48 [inline]
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc+0x111/0x140 mm/kasan/common.c:461
 __kmalloc+0x17b/0x2a0 mm/slub.c:3970
 kmalloc include/linux/slab.h:557 [inline]
 squashfs_read_table+0x2c/0x3c0 fs/squashfs/cache.c:413
 squashfs_read_id_index_table+0x7c/0x100 fs/squashfs/id.c:77
 squashfs_fill_super+0x117e/0x1c90 fs/squashfs/super.c:238
 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1344
 vfs_get_tree+0x88/0x270 fs/super.c:1549
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x17b4/0x2a20 fs/namespace.c:3205
 do_mount fs/namespace.c:3218 [inline]
 __do_sys_mount fs/namespace.c:3426 [inline]
 __se_sys_mount+0x28c/0x320 fs/namespace.c:3403
 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 ffff8880138cd8e8
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 16 bytes to the right of
 8-byte region [ffff8880138cd8e8, ffff8880138cd8f0)
The buggy address belongs to the page:
page:0000000092fffef9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x138cd
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea0000452c00 0000000500000005 ffff888010441c80
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880138cd800: fc fc fc fc 00 fc fc fc fc 00 fc fc fc fc 00 fc
 ffff8880138cd880: fc fc fc fa fc fc fc fc fa fc fc fc fc 00 fc fc
>ffff8880138cd900: fc fc fa fc fc fc fc 00 fc fc fc fc fa fc fc fc
                   ^
 ffff8880138cd980: fc fa fc fc fc fc 00 fc fc fc fc fa fc fc fc fc
 ffff8880138cda00: fa fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa
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