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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 ffff88809367bbb8 by task syz-executor.3/13551

CPU: 1 PID: 13551 Comm: syz-executor.3 Not tainted 4.19.157-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:00007f6e6a8f3a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6e6a8f3b20 RCX: 000000000046090a
RDX: 0000000020000040 RSI: 0000000020000100 RDI: 00007f6e6a8f3ae0
RBP: 00007f6e6a8f3ae0 R08: 00007f6e6a8f3b20 R09: 0000000020000040
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000040
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020000080

Allocated by task 8154:
 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 apparmor_sk_alloc_security+0x5c/0xe0 security/apparmor/lsm.c:769
 security_sk_alloc+0x50/0xb0 security/security.c:1469
 sk_prot_alloc+0xf1/0x2d0 net/core/sock.c:1469
 sk_alloc+0x36/0xec0 net/core/sock.c:1520
 inet_create net/ipv4/af_inet.c:321 [inline]
 inet_create+0x369/0xdf0 net/ipv4/af_inet.c:247
 __sock_create+0x3d8/0x740 net/socket.c:1276
 sock_create net/socket.c:1316 [inline]
 __sys_socket+0xef/0x200 net/socket.c:1346
 __do_sys_socket net/socket.c:1355 [inline]
 __se_sys_socket net/socket.c:1353 [inline]
 __x64_sys_socket+0x6f/0xb0 net/socket.c:1353
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8154:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 security_sk_free+0x3e/0x70 security/security.c:1474
 sk_prot_free net/core/sock.c:1499 [inline]
 __sk_destruct+0x51d/0x8a0 net/core/sock.c:1584
 sk_destruct net/core/sock.c:1599 [inline]
 __sk_free+0x165/0x3b0 net/core/sock.c:1610
 sk_free+0x3b/0x50 net/core/sock.c:1621
 sock_put include/net/sock.h:1711 [inline]
 tcp_close+0xb23/0xfd0 net/ipv4/tcp.c:2506
 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427
 __sock_release+0xcd/0x2a0 net/socket.c:579
 sock_close+0x15/0x20 net/socket.c:1140
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88809367bb80
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 24 bytes to the right of
 32-byte region [ffff88809367bb80, ffff88809367bba0)
The buggy address belongs to the page:
page:ffffea00024d9ec0 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff88809367bfc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002bd5688 ffffea0002b862c8 ffff88813bff01c0
raw: ffff88809367bfc1 ffff88809367b000 0000000100000021 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809367ba80: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
 ffff88809367bb00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff88809367bb80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
                                        ^
 ffff88809367bc00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88809367bc80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
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squashfs: SQUASHFS error: unable to read inode lookup table