loop0: detected capacity change from 8 to 0
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BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1bc/0x1f0 fs/squashfs/id.c:38
Read of size 8 at addr ffff888021d47498 by task syz-executor.0/24640

CPU: 0 PID: 24640 Comm: syz-executor.0 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413
 squashfs_get_id+0x1bc/0x1f0 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+0x440/0x760 fs/super.c:1291
 vfs_get_tree+0x89/0x2f0 fs/super.c:1496
 do_new_mount fs/namespace.c:2878 [inline]
 path_mount+0x13ad/0x20c0 fs/namespace.c:3208
 do_mount fs/namespace.c:3221 [inline]
 __do_sys_mount fs/namespace.c:3429 [inline]
 __se_sys_mount fs/namespace.c:3406 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3406
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x460c6a
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:00007f4474d8ca78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4474d8cb10 RCX: 0000000000460c6a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f4474d8cad0
RBP: 00007f4474d8cad0 R08: 00007f4474d8cb10 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020010300

Allocated by task 4895:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:401 [inline]
 ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:682 [inline]
 lsm_cred_alloc security/security.c:534 [inline]
 security_prepare_creds+0x10e/0x190 security/security.c:1633
 prepare_creds+0x509/0x730 kernel/cred.c:285
 access_override_creds fs/open.c:353 [inline]
 do_faccessat+0x3d7/0x820 fs/open.c:417
 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 ffff888021d47488
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 8 bytes to the right of
 8-byte region [ffff888021d47488, ffff888021d47490)
The buggy address belongs to the page:
page:00000000cdea02c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21d47
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888010041c80
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888021d47380: fc fc fc 00 fc fc fc fc fa fc fc fc fc fb fc fc
 ffff888021d47400: fc fc fb fc fc fc fc 00 fc fc fc fc 00 fc fc fc
>ffff888021d47480: fc fb fc fc fc fc fa fc fc fc fc fa fc fc fc fc
                            ^
 ffff888021d47500: 00 fc fc fc fc 00 fc fc fc fc 00 fc fc fc fc fa
 ffff888021d47580: fc fc fc fc fb fc fc fc fc fb fc fc fc fc 00 fc
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