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patch 8.1.0976: dosinstall still has buffer overflow problems

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Problem:    Dosinstall still has buffer overflow problems.
Solution:   Adjust  buffer sizes. (Yasuhiro Matsumoto, closes #4002)
This commit is contained in:
Bram Moolenaar
2019-02-22 19:41:08 +01:00
parent c666388367
commit e4963c543d
4 changed files with 36 additions and 32 deletions
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12
src/dosinst.h
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@@ -59,7 +59,7 @@ char *searchpath(char *name);
/* ---------------------------------------- */
#define BUFSIZE 512 /* long enough to hold a file name path */
#define BUFSIZE (MAX_PATH*2) /* long enough to hold a file name path */
#define NUL 0
#define FAIL 0
@@ -93,15 +93,15 @@ int interactive; /* non-zero when running interactively */
static void *
alloc(int len)
{
char *s;
void *p;
s = malloc(len);
if (s == NULL)
p = malloc(len);
if (p == NULL)
{
printf("ERROR: out of memory\n");
exit(1);
}
return (void *)s;
return p;
}
/*
@@ -512,7 +512,7 @@ char *sysdrive; /* system drive or "c:\" */
do_inits(char **argv)
{
/* Find out the full path of our executable. */
if (my_fullpath(installdir, argv[0], BUFSIZE) == NULL)
if (my_fullpath(installdir, argv[0], sizeof(installdir)) == NULL)
{
printf("ERROR: Cannot get name of executable\n");
myexit(1);