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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 ffff88809a7707d8 by task syz-executor474/6866

CPU: 0 PID: 6866 Comm: syz-executor474 Not tainted 5.9.0-rc7-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+0x1d6/0x29e lib/dump_stack.c:118
 print_address_description+0x66/0x620 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report+0x132/0x1d0 mm/kasan/report.c:530
 squashfs_get_id+0xb9/0x1c0 fs/squashfs/id.c:38
 squashfs_new_inode fs/squashfs/inode.c:51 [inline]
 squashfs_read_inode+0x155/0x2170 fs/squashfs/inode.c:120
 squashfs_fill_super+0x1478/0x1790 fs/squashfs/super.c:310
 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1342
 vfs_get_tree+0x88/0x270 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x179d/0x29e0 fs/namespace.c:3192
 do_mount fs/namespace.c:3205 [inline]
 __do_sys_mount fs/namespace.c:3413 [inline]
 __se_sys_mount+0x126/0x180 fs/namespace.c:3390
 do_syscall_64+0x31/0x70 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:00007ffe8651e1c8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffe8651e220 RCX: 0000000000446d4a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe8651e1e0
RBP: 00007ffe8651e1e0 R08: 00007ffe8651e220 R09: 00007ffe00000015
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:48 [inline]
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc+0x100/0x130 mm/kasan/common.c:461
 kmalloc_node include/linux/slab.h:577 [inline]
 kvmalloc_node+0x81/0x110 mm/util.c:574
 kvmalloc include/linux/mm.h:757 [inline]
 memcg_init_list_lru_node mm/list_lru.c:357 [inline]
 memcg_init_list_lru mm/list_lru.c:448 [inline]
 __list_lru_init+0x3b1/0x940 mm/list_lru.c:615
 alloc_super+0x726/0x870 fs/super.c:274
 sget_fc+0x257/0x670 fs/super.c:530
 vfs_get_super fs/super.c:1186 [inline]
 get_tree_nodev+0x26/0x160 fs/super.c:1221
 vfs_get_tree+0x88/0x270 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x179d/0x29e0 fs/namespace.c:3192
 do_mount fs/namespace.c:3205 [inline]
 __do_sys_mount fs/namespace.c:3413 [inline]
 __se_sys_mount+0x126/0x180 fs/namespace.c:3390
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff88809a7707c0
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 24 bytes inside of
 32-byte region [ffff88809a7707c0, ffff88809a7707e0)
The buggy address belongs to the page:
page:00000000d2916126 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88809a770fc1 pfn:0x9a770
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000289f608 ffffea00026e1888 ffff8880aa440100
raw: ffff88809a770fc1 ffff88809a770000 000000010000003c 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809a770680: 00 fc fc fc fc fc fc fc 00 00 01 fc fc fc fc fc
 ffff88809a770700: 00 fc fc fc fc fc fc fc 00 01 fc fc fc fc fc fc
>ffff88809a770780: 06 fc fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
                                                    ^
 ffff88809a770800: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
 ffff88809a770880: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
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