Fix crash:
Fix crash:

==31615== ERROR: AddressSanitizer: attempting free on address which was not malloc()-ed: 0x0000008ad820
    #0 0x7ffff4e61009 (/usr.jigger/lib64/libasan.so.0.0.0+0x16009)
    #1 0x4d5de2 (/home/zhihui/projects-yuzu/wokfs/mount_wokfs/mount_wokfs+0x4d5de2)
    #2 0x57dcca (/home/zhihui/projects-yuzu/wokfs/mount_wokfs/mount_wokfs+0x57dcca)
    #3 0x7fffefd35ebd (/home/zhihui/projects-yuzu/slash2/mount_slash/slash2client.so+0x4a5ebd)
    #4 0x7fffefd3df37 (/home/zhihui/projects-yuzu/slash2/mount_slash/slash2client.so+0x4adf37)
    #5 0x7fffef9e6a04 (/home/zhihui/projects-yuzu/slash2/mount_slash/slash2client.so+0x156a04)
    #6 0x7fffef976503 (/home/zhihui/projects-yuzu/slash2/mount_slash/slash2client.so+0xe6503)
    #7 0x7fffef98bdc6 (/home/zhihui/projects-yuzu/slash2/mount_slash/slash2client.so+0xfbdc6)
    #8 0x7fffef98e547 (/home/zhihui/projects-yuzu/slash2/mount_slash/slash2client.so+0xfe547)
    #9 0x5e2afe (/home/zhihui/projects-yuzu/wokfs/mount_wokfs/mount_wokfs+0x5e2afe)
    #10 0x7ffff4e64a97 (/usr.jigger/lib64/libasan.so.0.0.0+0x19a97)

pscedu/pfl,pscedu/slash2-stable,pscedu/pfl,pscedu/pfl,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/pfl,pscedu/slash2-stable,pscedu/slash2-stable