patches/unzip/unzip-6.0-overflow.patch

   1 diff --git a/extract.c b/extract.c
   2 index a0a4929..9ef80b3 100644
   3 --- a/extract.c
   4 +++ b/extract.c
   5 @@ -2214,6 +2214,7 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
   6      ulg eb_ucsize;
   7      uch *eb_ucptr;
   8      int r;
   9 +    ush method;
  10
  11      if (compr_offset < 4)                /* field is not compressed: */
  12          return PK_OK;                    /* do nothing and signal OK */
  13 @@ -2223,6 +2224,12 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
  14           eb_size <= (compr_offset + EB_CMPRHEADLEN)))
  15          return IZ_EF_TRUNC;               /* no compressed data! */
  16
  17 +    method = makeword(eb + (EB_HEADSIZE + compr_offset));
  18 +    if ((method == STORED) && (eb_size != compr_offset + EB_CMPRHEADLEN + eb_ucsize))
  19 +        return PK_ERR;            /* compressed & uncompressed
  20 +                                   * should match in STORED
  21 +                                   * method */
  22 +
  23      if (
  24  #ifdef INT_16BIT
  25          (((ulg)(extent)eb_ucsize) != eb_ucsize) ||