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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 ffff88801cfb4f20 by task syz-executor.0/13646

CPU: 0 PID: 13646 Comm: syz-executor.0 Not tainted 5.9.0-rc7-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+0x198/0x1fd lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:38
 squashfs_new_inode fs/squashfs/inode.c:51 [inline]
 squashfs_read_inode+0x197/0x1940 fs/squashfs/inode.c:120
 squashfs_fill_super+0x1079/0x1ecf fs/squashfs/super.c:310
 get_tree_bdev+0x421/0x740 fs/super.c:1342
 vfs_get_tree+0x89/0x2f0 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x1387/0x20a0 fs/namespace.c:3192
 do_mount+0xf3/0x110 fs/namespace.c:3205
 __do_compat_sys_mount fs/compat.c:122 [inline]
 __se_compat_sys_mount fs/compat.c:89 [inline]
 __ia32_compat_sys_mount+0x193/0x710 fs/compat.c:89
 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline]
 __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f11549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f550af00 EFLAGS: 00000292 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000f550af70 RCX: 0000000020000100
RDX: 0000000020000000 RSI: 0000000000000000 RDI: 00000000f550afb0
RBP: 00000000f550afb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 9268:
 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
 kmalloc_node include/linux/slab.h:577 [inline]
 kvmalloc_node+0x61/0xf0 mm/util.c:574
 xt_jumpstack_alloc net/netfilter/x_tables.c:1323 [inline]
 xt_replace_table+0x1a2/0x7e0 net/netfilter/x_tables.c:1362
 __do_replace+0x1d7/0x8c0 net/ipv6/netfilter/ip6_tables.c:1083
 compat_do_replace.constprop.0+0x29c/0x470 net/ipv6/netfilter/ip6_tables.c:1530
 do_ip6t_set_ctl+0x5b0/0xb87 net/ipv6/netfilter/ip6_tables.c:1633
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1008
 tcp_setsockopt+0x136/0x24e0 net/ipv4/tcp.c:3333
 __sys_setsockopt+0x2db/0x610 net/socket.c:2132
 __do_compat_sys_socketcall+0x4ef/0x660 net/compat.c:492
 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline]
 __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

The buggy address belongs to the object at ffff88801cfb4f00
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes to the right of
 32-byte region [ffff88801cfb4f00, ffff88801cfb4f20)
The buggy address belongs to the page:
page:0000000003479ee2 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801cfb4fc1 pfn:0x1cfb4
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea00008e66c8 ffffea0000a26788 ffff88802c840100
raw: ffff88801cfb4fc1 ffff88801cfb4000 000000010000002d ffff88801c736001
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff88801c736001

Memory state around the buggy address:
 ffff88801cfb4e00: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
 ffff88801cfb4e80: 00 00 00 fc fc fc fc fc 00 fc fc fc fc fc fc fc
>ffff88801cfb4f00: fb fb fb fb fc fc fc fc 00 00 fc fc fc fc fc fc
                               ^
 ffff88801cfb4f80: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801cfb5000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
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