loop1: detected capacity change from 131116 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 ffff888011d5aae8 by task syz-executor.1/18043

CPU: 0 PID: 18043 Comm: syz-executor.1 Not tainted 5.10.0-next-20201217-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:2896 [inline]
 path_mount+0x12ae/0x1e70 fs/namespace.c:3227
 do_mount fs/namespace.c:3240 [inline]
 __do_sys_mount fs/namespace.c:3448 [inline]
 __se_sys_mount fs/namespace.c:3425 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3425
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x460b9a
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:00007f8867a7ba78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f8867a7bb10 RCX: 0000000000460b9a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f8867a7bad0
RBP: 00007f8867a7bad0 R08: 00007f8867a7bb10 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020010200

Allocated by task 8572:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:39
 kasan_set_track mm/kasan/common.c:47 [inline]
 set_alloc_info mm/kasan/common.c:405 [inline]
 ____kasan_kmalloc mm/kasan/common.c:436 [inline]
 ____kasan_kmalloc.constprop.0+0xa0/0xd0 mm/kasan/common.c:408
 kmalloc_node include/linux/slab.h:575 [inline]
 __vmalloc_area_node+0x556/0x6e0 mm/vmalloc.c:2494
 __vmalloc_node_range mm/vmalloc.c:2575 [inline]
 __vmalloc_node mm/vmalloc.c:2618 [inline]
 vzalloc+0x116/0x1a0 mm/vmalloc.c:2671
 alloc_counters net/ipv4/netfilter/ip_tables.c:800 [inline]
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:822 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1023 [inline]
 do_ipt_get_ctl+0x610/0x9d0 net/ipv4/netfilter/ip_tables.c:1660
 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116
 ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline]
 ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1756
 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4141
 __sys_getsockopt+0x219/0x4c0 net/socket.c:2156
 __do_sys_getsockopt net/socket.c:2171 [inline]
 __se_sys_getsockopt net/socket.c:2168 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2168
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 8572:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:39
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:47
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:355
 ____kasan_slab_free.part.0+0xe1/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:188 [inline]
 slab_free_hook mm/slub.c:1548 [inline]
 slab_free_freelist_hook+0x82/0x1d0 mm/slub.c:1586
 slab_free mm/slub.c:3157 [inline]
 kfree+0xdb/0x3c0 mm/slub.c:4156
 kvfree+0x42/0x50 mm/util.c:616
 __vunmap+0x92a/0xb90 mm/vmalloc.c:2291
 __vfree+0x3c/0xd0 mm/vmalloc.c:2334
 vfree+0x5a/0x90 mm/vmalloc.c:2365
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:867 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1023 [inline]
 do_ipt_get_ctl+0x803/0x9d0 net/ipv4/netfilter/ip_tables.c:1660
 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116
 ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline]
 ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1756
 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4141
 __sys_getsockopt+0x219/0x4c0 net/socket.c:2156
 __do_sys_getsockopt net/socket.c:2171 [inline]
 __se_sys_getsockopt net/socket.c:2168 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2168
 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 ffff888011d5aac8
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 24 bytes to the right of
 8-byte region [ffff888011d5aac8, ffff888011d5aad0)
The buggy address belongs to the page:
page:00000000f4503089 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11d5a
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888010841c80
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888011d5a980: fc fa fc fc fc fc 00 fc fc fc fc fa fc fc fc fc
 ffff888011d5aa00: fb fc fc fc fc fa fc fc fc fc fb fc fc fc fc fa
>ffff888011d5aa80: fc fc fc fc 00 fc fc fc fc fa fc fc fc fc fb fc
                                                          ^
 ffff888011d5ab00: fc fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc
 ffff888011d5ab80: fc fc fa fc fc fc fc fa fc fc fc fc fb fc fc fc
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