Re: Administrivia: List Announcement

From: Edinelson Keiji Shimokawa (dev_at_pop.com.br)
Date: 05/14/03

  • Next message: Berend-Jan Wever: "Re: MSIE integer overflows" 
    To: "Benjamin A. Okopnik" <ben@callahans.org>
Date: Wed, 14 May 2003 10:21:28 -0300

    Benjamin A. Okopnik disse:

    > l1 = strlen(p1);
    > s1 = sizeof(p1);
    > l2 = strlen(p2);
    > s2 = sizeof(p2);

    I think that there we need to code:

    > l1 = strlen(buf1);
    > s1 = sizeof(buf1);
    > l2 = strlen(buf2);
    > s2 = sizeof(buf2);

    but, I coded and the results:
    # ./a.out `perl -e 'print "A" x 251;print " "; print "B" x 251'`
    strlen1: 251 sizeof1: 4
    strlen2: 251 sizeof2: 4
    # ./a.out `perl -e 'print "A" x 252;print " "; print "B" x 251'`
    strlen1: 254 sizeof1: 4
    strlen2: 251 sizeof2: 4
    # ./a.out `perl -e 'print "A" x 253;print " "; print "B" x 251'`
    Segmentation fault
    # ./a.out `perl -e 'print "A" x 252;print " "; print "B" x 252'`
    strlen1: 254 sizeof1: 4
    strlen2: 254 sizeof2: 4
    # ./a.out `perl -e 'print "A" x 251;print " "; print "B" x 252'`
    strlen1: 251 sizeof1: 4
    strlen2: 254 sizeof2: 4
    # ./a.out `perl -e 'print "A" x 252;print " "; print "B" x 253'`
    strlen1: 254 sizeof1: 4
    strlen2: 254 sizeof2: 4
    # ./a.out `perl -e 'print "A" x 252;print " "; print "B" x 254'`
    strlen1: 254 sizeof1: 4
    strlen2: 254 sizeof2: 4
    # ./a.out `perl -e 'print "A" x 252;print " "; print "B" x 255'`
    strlen1: 254 sizeof1: 4
    strlen2: 254 sizeof2: 4

    mmm... it seems that buf2 overflowed 2 bytes. try other sizes for SIZE.
    I have tried 248 and 250. it's amazing that doesn't sigfaults.
    seems a very special condition.

    Edinelson Keiji Shimokawa.
    A jedi prentice owned by Dark Force.

      

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  • Next message: Berend-Jan Wever: "Re: MSIE integer overflows"