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Fix a memory leak on topology_parse().

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strdup(3) allocates memory for a copy of the string, does the copy and
returns a pointer to it. If there is no sufficient memory NULL is returned
and the global errno is set to ENOMEM.
We do a sanity check to see if it was possible to allocate enough memory.

Also as we allocate memory, we need to free this memory used. Or it will
going out of scope leaks the storage it points to.

Reviewed by:	rgrimes
MFC after:	3 weeks.
X-MFC:		r332298
Sponsored by:	iXsystems Inc.
Differential Revision:	https://reviews.freebsd.org/D15550
This commit is contained in:
Marcelo Araujo 2018-05-25 02:07:05 +00:00
parent 13daedc0b7
commit ea089f8c71
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=334199
1 changed files with 9 additions and 2 deletions
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11
usr.sbin/bhyve/bhyverun.c
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@ -193,6 +193,7 @@ topology_parse(const char *opt)
c = 1, n = 1, s = 1, t = 1;
ns = false, scts = false;
str = strdup(opt);
assert(str != NULL);
while ((cp = strsep(&str, ",")) != NULL) {
if (sscanf(cp, "%i%n", &tmp, &chk) == 1) {
@ -218,11 +219,13 @@ topology_parse(const char *opt)
} else if (cp[0] == '\0')
continue;
else
return (-1);
goto out;
/* Any trailing garbage causes an error */
if (cp[chk] != '\0')
return (-1);
goto out;
}
free(str);
/*
* Range check 1 <= n <= UINT16_MAX all values
*/
@ -248,6 +251,10 @@ topology_parse(const char *opt)
cores = c;
threads = t;
return(0);
out:
free(str);
return (-1);
}
static int