d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Silence Clang Scan warnings regarding the use of strcp().

Browse Source 
While these warnings are false positives, the use of strdup() instead of
malloc() and strcpy() simplifies and clarifies the code.

While checking the remaining uses of strcpy and strcat I noticed an
assignment of a strlen() to a variable "s", whose value needs to be
preserved for use in later output routines (where it is used to allocate
a buffer). I do not think that the value of "s" will come out lower than
its correct value and thus there is no risk of a buffer overflow, in the
general case, but a specially crafter argument might lead to an overflow.

The bogus assignment to "s" is removed since this value was only used a
single time in the following malloc() call, which has been removed.

MFC after:	2 weeks
This commit is contained in:
Stefan Eßer 2019-01-24 18:39:45 +00:00
parent fc24ba59ee
commit f5ce14028c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=343408
1 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
usr.bin/whereis/whereis.c
View File

@ -285,9 +285,9 @@ defaults(void)
bindirs[nele] = NULL;
if ((cp = getenv("PATH")) != NULL) {
/* don't destroy the original environment... */
if ((b = malloc(strlen(cp) + 1)) == NULL)
b = strdup(cp);
if (b == NULL)
abort();
strcpy(b, cp);
decolonify(b, &bindirs, &nele);
}
}
@ -301,18 +301,18 @@ defaults(void)
err(EX_OSERR, "error processing manpath results");
if ((b = strchr(buf, '\n')) != NULL)
*b = '\0';
if ((b = malloc(strlen(buf) + 1)) == NULL)
b = strdup(buf);
if (b == NULL)
abort();
strcpy(b, buf);
nele = 0;
decolonify(b, &mandirs, &nele);
}
/* -s defaults to precompiled list, plus subdirs of /usr/ports */
if (!sourcedirs) {
if ((b = malloc(strlen(sourcepath) + 1)) == NULL)
b = strdup(sourcepath);
if (b == NULL)
abort();
strcpy(b, sourcepath);
nele = 0;
decolonify(b, &sourcedirs, &nele);
@ -523,11 +523,9 @@ main(int argc, char **argv)
* man -w found plain source
* page, use it.
*/
s = strlen(buf);
cp2 = malloc(s + 1);
cp2 = strdup(buf);
if (cp2 == NULL)
abort();
strcpy(cp2, buf);
}
if (man == NULL) {