IPVS: ftp: loaded support on port[0] = 21
==================================================================
BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
Read of size 8 at addr ffff8880608e7238 by task syz-executor.2/7810

CPU: 1 PID: 7810 Comm: syz-executor.2 Not tainted 4.19.163-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:68 [inline]
 squashfs_read_inode+0x1ee/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: 0033:0x460b9a
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:00007f85797d5a78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f85797d5b10 RCX: 0000000000460b9a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f85797d5ad0
RBP: 00007f85797d5ad0 R08: 00007f85797d5b10 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020000240

Allocated by task 7065:
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc_track_caller+0x155/0x3c0 mm/slab.c:3742
 kstrdup+0x36/0x70 mm/util.c:56
 kstrdup_const+0x53/0x80 mm/util.c:77
 alloc_vfsmnt+0xb5/0x780 fs/namespace.c:188
 clone_mnt+0x6c/0x11b0 fs/namespace.c:1001
 copy_tree+0x3af/0xaf0 fs/namespace.c:1757
 copy_mnt_ns+0x1c2/0xad0 fs/namespace.c:2897
 create_new_namespaces+0xd6/0x7b0 kernel/nsproxy.c:75
 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206
 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2551
 __do_sys_unshare kernel/fork.c:2619 [inline]
 __se_sys_unshare kernel/fork.c:2617 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2617
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 9:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 kfree_const+0x51/0x60 mm/util.c:38
 free_vfsmnt fs/namespace.c:555 [inline]
 delayed_free_vfsmnt+0x32/0x80 fs/namespace.c:564
 __rcu_reclaim kernel/rcu/rcu.h:236 [inline]
 rcu_do_batch kernel/rcu/tree.c:2584 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0x8ff/0x18b0 kernel/rcu/tree.c:2881
 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292

The buggy address belongs to the object at ffff8880608e7200
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 24 bytes to the right of
 32-byte region [ffff8880608e7200, ffff8880608e7220)
The buggy address belongs to the page:
page:ffffea00018239c0 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880608e7fc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002a25988 ffffea0002ccc348 ffff88813bff01c0
raw: ffff8880608e7fc1 ffff8880608e7000 000000010000003f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880608e7100: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
 ffff8880608e7180: fb fb fb fb fc fc fc fc 00 00 fc fc fc fc fc fc
>ffff8880608e7200: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
                                        ^
 ffff8880608e7280: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
 ffff8880608e7300: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
squashfs: SQUASHFS error: unable to read fragment index table