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BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:38
Read of size 8 at addr ffff888016990ce0 by task syz-executor.3/11225

CPU: 1 PID: 11225 Comm: syz-executor.3 Not tainted 5.10.0-rc2-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
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: 0033:0x45eb7a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 8d a0 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 6a a0 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007fb02cca0aa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb02cca0b40 RCX: 000000000045eb7a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fb02cca0b00
RBP: 00007fb02cca0b00 R08: 00007fb02cca0b40 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020010300

Allocated by task 2:
 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+0x23d/0x490 mm/slab.c:3666
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 lsm_cred_alloc security/security.c:533 [inline]
 security_prepare_creds+0x10e/0x190 security/security.c:1632
 prepare_creds+0x4bd/0x6c0 kernel/cred.c:285
 copy_creds+0x9f/0x770 kernel/cred.c:358
 copy_process+0x1282/0x6e90 kernel/fork.c:1971
 kernel_clone+0xe7/0xab0 kernel/fork.c:2456
 kernel_thread+0xb5/0xf0 kernel/fork.c:2508
 create_kthread kernel/kthread.c:315 [inline]
 kthreadd+0x4f5/0x740 kernel/kthread.c:633
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

The buggy address belongs to the object at ffff888016990cc0
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes to the right of
 32-byte region [ffff888016990cc0, ffff888016990ce0)
The buggy address belongs to the page:
page:000000009033ead3 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888016990fc1 pfn:0x16990
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea00008f0948 ffffea00004e9a88 ffff888010040100
raw: ffff888016990fc1 ffff888016990000 0000000100000036 ffff888019add401
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff888019add401

Memory state around the buggy address:
 ffff888016990b80: fb fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc
 ffff888016990c00: 00 00 fc fc fc fc fc fc fb fb fb fb fc fc fc fc
>ffff888016990c80: 00 fc fc fc fc fc fc fc 00 00 00 fc fc fc fc fc
                                                       ^
 ffff888016990d00: 00 00 fc fc fc fc fc fc 00 00 00 00 fc fc fc fc
 ffff888016990d80: 00 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc
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