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BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
Read of size 8 at addr ffff8880a357f560 by task syz-executor.3/30390

CPU: 0 PID: 30390 Comm: syz-executor.3 Not tainted 4.19.161-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+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
 squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
 squashfs_new_inode fs/squashfs/inode.c:64 [inline]
 squashfs_read_inode+0x1b4/0x1b40 fs/squashfs/inode.c:133
 squashfs_fill_super+0x1655/0x1c00 fs/squashfs/super.c:318
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x30c fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2799
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
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:00007f4506535a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4506535b20 RCX: 000000000046090a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f4506535ae0
RBP: 00007f4506535ae0 R08: 00007f4506535b20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020010300

Allocated by task 1:
 __do_kmalloc_node mm/slab.c:3689 [inline]
 __kmalloc_node+0x4c/0x70 mm/slab.c:3696
 kmalloc_node include/linux/slab.h:557 [inline]
 kvmalloc_node+0x61/0xf0 mm/util.c:423
 kvmalloc include/linux/mm.h:577 [inline]
 memcg_init_list_lru_node mm/list_lru.c:365 [inline]
 memcg_init_list_lru mm/list_lru.c:456 [inline]
 __list_lru_init+0x4c6/0x7f0 mm/list_lru.c:624
 alloc_super fs/super.c:269 [inline]
 sget_userns+0x810/0xcd0 fs/super.c:519
 kernfs_mount_ns+0x11b/0x890 fs/kernfs/mount.c:325
 kernfs_mount include/linux/kernfs.h:554 [inline]
 cgroup_do_mount+0xa8/0x4f0 kernel/cgroup/cgroup.c:2008
 cgroup1_mount+0x70f/0x10a8 kernel/cgroup/cgroup-v1.c:1246
 cgroup_mount+0x17e/0xb10 kernel/cgroup/cgroup.c:2080
 mount_fs+0xa3/0x30c fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2799
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8880a357f540
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes to the right of
 32-byte region [ffff8880a357f540, ffff8880a357f560)
The buggy address belongs to the page:
page:ffffea00028d5fc0 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880a357ffc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002cd5448 ffffea0002523988 ffff88813bff01c0
raw: ffff8880a357ffc1 ffff8880a357f000 000000010000003d 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a357f400: 00 00 06 fc fc fc fc fc 00 05 fc fc fc fc fc fc
 ffff8880a357f480: 07 fc fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
>ffff8880a357f500: 00 fc fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
                                                       ^
 ffff8880a357f580: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
 ffff8880a357f600: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
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