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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 ffff88801edd6760 by task syz-executor.2/22609

CPU: 0 PID: 22609 Comm: syz-executor.2 Not tainted 5.9.0-rc6-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 fs/namespace.c:3205 [inline]
 __do_sys_mount fs/namespace.c:3413 [inline]
 __se_sys_mount fs/namespace.c:3390 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3390
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ee5a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 6d 9e 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 4a 9e fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f16b41b6aa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f16b41b6b40 RCX: 000000000045ee5a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f16b41b6b00
RBP: 00007f16b41b6b00 R08: 00007f16b41b6b40 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020010300

Allocated by task 13683:
 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_array_node include/linux/slab.h:629 [inline]
 kcalloc_node include/linux/slab.h:634 [inline]
 memcg_alloc_page_obj_cgroups+0x79/0x110 mm/memcontrol.c:2861
 memcg_slab_post_alloc_hook+0x88/0x500 mm/slab.h:331
 slab_post_alloc_hook mm/slab.h:525 [inline]
 slab_alloc_node mm/slab.c:3258 [inline]
 kmem_cache_alloc_node_trace+0x168/0x430 mm/slab.c:3596
 __do_kmalloc_node mm/slab.c:3618 [inline]
 __kmalloc_node+0x38/0x60 mm/slab.c:3626
 kmalloc_node include/linux/slab.h:577 [inline]
 kvmalloc_node+0x61/0xf0 mm/util.c:574
 kvmalloc include/linux/mm.h:757 [inline]
 xt_alloc_table_info+0x3c/0xa0 net/netfilter/x_tables.c:1176
 do_replace net/ipv6/netfilter/ip6_tables.c:1141 [inline]
 do_ip6t_set_ctl+0x500/0xb87 net/ipv6/netfilter/ip6_tables.c:1636
 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_sys_setsockopt net/socket.c:2143 [inline]
 __se_sys_setsockopt net/socket.c:2140 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2140
 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 ffff88801edd6740
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes to the right of
 32-byte region [ffff88801edd6740, ffff88801edd6760)
The buggy address belongs to the page:
page:00000000342a61d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801edd6fc1 pfn:0x1edd6
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0000a68248 ffffea0000a10248 ffff88802c840100
raw: ffff88801edd6fc1 ffff88801edd6000 0000000100000036 ffff888027eb0c01
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff888027eb0c01

Memory state around the buggy address:
 ffff88801edd6600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 ffff88801edd6680: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
>ffff88801edd6700: 00 fc fc fc fc fc fc fc 00 fc fc fc fc fc fc fc
                                                       ^
 ffff88801edd6780: fa fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88801edd6800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
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