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binutils-gdb/gnulib/patches/0003-Fix-glob-c-Coverity-issues.patch
Gary Benson 8ae0786c30 Fix Gnulib glob.c resource leaks found by Coverity 
Coverity discovered a number of resource leaks in Gnulib's glob.c.
This commit backports the Gnulib commits that fix the leaks.

gnulib/ChangeLog:

	* patches/0003-Fix-glob-c-Coverity-issues.patch: New file.
	* update-gnulib.sh: List the above.
	* import/glob.c: Rebuild.
2019-08-28 15:19:28 +01:00

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Coverity discovered a number of resource leaks in Gnulib.
The solution is to backport the following Gnulib commits:
commit 0eee3ccaae5bb3d0016a0da8b8e5108767c02748
Author: Bruno Haible <bruno@clisp.org>
Date: Fri Mar 31 22:41:38 2017 +0200
glob: Fix memory leaks.
* lib/glob.c (glob): Free allocated memory before returning.
Reported by Coverity via Tim Rühsen.
commit b1d7f3165ba1c7a44a29017eb80491094aa240ba
Author: Bruno Haible <bruno@clisp.org>
Date: Fri Mar 31 22:43:35 2017 +0200
glob: Fix invalid free() call.
* lib/glob.c (glob): Reset malloc_home_dir when assigning a pointer to
static storage to home_dir.
Reported by Coverity via Tim Rühsen.
commit 1540f3441555f756558f3a18e5f68914c0b72227
Author: Bruno Haible <bruno@clisp.org>
Date: Sat Apr 1 15:15:18 2017 +0200
glob: Fix more memory leaks.
* lib/glob.c (glob): Free allocated memory before returning.
Reported by Coverity via Tim Rühsen.
commit b19cb256c9a4d3a138c27181cffee5513edb0e81
Author: Bruno Haible <bruno@clisp.org>
Date: Thu Jul 6 23:21:49 2017 +0200
glob: Fix more memory leaks.
* lib/glob.c (glob): Free dirname before returning.
Reported by Coverity and Tim Rühsen.
commit 8cb994d1fc4a957359780e1a4187b4f250c1cea5
Author: Tim Rühsen <tim.ruehsen@gmx.de>
Date: Mon Jul 10 19:02:19 2017 +0200
glob: Fix more memory leaks.
* lib/glob.c (glob): Use 'goto out' in order to free dirname before
returning.
Reported by Tim Rühsen.
diff --git a/gnulib/import/glob.c b/gnulib/import/glob.c
index 4b04b90..416d210 100644
--- a/gdb/gnulib/import/glob.c
+++ b/gdb/gnulib/import/glob.c
@@ -734,6 +734,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
pwtmpbuf = malloc (pwbuflen);
if (pwtmpbuf == NULL)
{
+ if (__glibc_unlikely (malloc_name))
+ free (name);
retval = GLOB_NOSPACE;
goto out;
}
@@ -762,6 +764,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
if (newp == NULL)
{
free (malloc_pwtmpbuf);
+ if (__glibc_unlikely (malloc_name))
+ free (name);
retval = GLOB_NOSPACE;
goto out;
}
@@ -797,23 +801,30 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
malloc_home_dir = 1;
}
memcpy (home_dir, p->pw_dir, home_dir_len);
-
- free (pwtmpbuf);
}
}
+ free (malloc_pwtmpbuf);
+ }
+ else
+ {
+ if (__glibc_unlikely (malloc_name))
+ free (name);
}
}
if (home_dir == NULL || home_dir[0] == '\0')
{
+ if (__glibc_unlikely (malloc_home_dir))
+ free (home_dir);
if (flags & GLOB_TILDE_CHECK)
{
- if (__glibc_unlikely (malloc_home_dir))
- free (home_dir);
retval = GLOB_NOMATCH;
goto out;
}
else
- home_dir = (char *) "~"; /* No luck. */
+ {
+ home_dir = (char *) "~"; /* No luck. */
+ malloc_home_dir = 0;
+ }
}
# endif /* WINDOWS32 */
# endif
@@ -855,6 +866,9 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
dirname = newp;
dirlen += home_len - 1;
malloc_dirname = !use_alloca;
+
+ if (__glibc_unlikely (malloc_home_dir))
+ free (home_dir);
}
dirname_modified = 1;
}
@@ -1027,9 +1041,12 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
free (malloc_pwtmpbuf);
if (flags & GLOB_TILDE_CHECK)
- /* We have to regard it as an error if we cannot find the
- home directory. */
- return GLOB_NOMATCH;
+ {
+ /* We have to regard it as an error if we cannot find the
+ home directory. */
+ retval = GLOB_NOMATCH;
+ goto out;
+ }
}
}
}
@@ -1059,7 +1076,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
free (pglob->gl_pathv);
pglob->gl_pathv = NULL;
pglob->gl_pathc = 0;
- return GLOB_NOSPACE;
+ retval = GLOB_NOSPACE;
+ goto out;
}
new_gl_pathv = realloc (pglob->gl_pathv,
@@ -1077,12 +1095,19 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
p = mempcpy (pglob->gl_pathv[newcount], dirname, dirlen);
p[0] = '/';
p[1] = '\0';
+ if (__glibc_unlikely (malloc_dirname))
+ free (dirname);
}
else
{
- pglob->gl_pathv[newcount] = strdup (dirname);
- if (pglob->gl_pathv[newcount] == NULL)
- goto nospace;
+ if (__glibc_unlikely (malloc_dirname))
+ pglob->gl_pathv[newcount] = dirname;
+ else
+ {
+ pglob->gl_pathv[newcount] = strdup (dirname);
+ if (pglob->gl_pathv[newcount] == NULL)
+ goto nospace;
+ }
}
pglob->gl_pathv[++newcount] = NULL;
++pglob->gl_pathc;
@@ -1092,7 +1117,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
}
/* Not found. */
- return GLOB_NOMATCH;
+ retval = GLOB_NOMATCH;
+ goto out;
}
meta = __glob_pattern_type (dirname, !(flags & GLOB_NOESCAPE));
@@ -1138,7 +1164,10 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
if (status != 0)
{
if ((flags & GLOB_NOCHECK) == 0 || status != GLOB_NOMATCH)
- return status;
+ {
+ retval = status;
+ goto out;
+ }
goto no_matches;
}
@@ -1157,7 +1186,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
if (interrupt_state)
{
globfree (&dirs);
- return GLOB_ABORTED;
+ retval = GLOB_ABORTED;
+ goto out;
}
}
#endif /* SHELL. */
@@ -1176,7 +1206,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
globfree (&dirs);
globfree (pglob);
pglob->gl_pathc = 0;
- return status;
+ retval = status;
+ goto out;
}
/* Stick the directory on the front of each name. */
@@ -1187,7 +1218,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
globfree (&dirs);
globfree (pglob);
pglob->gl_pathc = 0;
- return GLOB_NOSPACE;
+ retval = GLOB_NOSPACE;
+ goto out;
}
}
@@ -1209,7 +1241,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
{
nospace2:
globfree (&dirs);
- return GLOB_NOSPACE;
+ retval = GLOB_NOSPACE;
+ goto out;
}
new_gl_pathv = realloc (pglob->gl_pathv,
@@ -1224,7 +1257,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
globfree (&dirs);
globfree (pglob);
pglob->gl_pathc = 0;
- return GLOB_NOSPACE;
+ retval = GLOB_NOSPACE;
+ goto out;
}
++pglob->gl_pathc;
@@ -1236,7 +1270,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
else
{
globfree (&dirs);
- return GLOB_NOMATCH;
+ retval = GLOB_NOMATCH;
+ goto out;
}
}
@@ -1282,7 +1317,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
flags = orig_flags;
goto no_matches;
}
- return status;
+ retval = status;
+ goto out;
}
if (dirlen > 0)
@@ -1294,7 +1330,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
{
globfree (pglob);
pglob->gl_pathc = 0;
- return GLOB_NOSPACE;
+ retval = GLOB_NOSPACE;
+ goto out;
}
}
}
@@ -1319,7 +1356,8 @@ glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
{
globfree (pglob);
pglob->gl_pathc = 0;
- return GLOB_NOSPACE;
+ retval = GLOB_NOSPACE;
+ goto out;
}
strcpy (&new[len - 2], "/");
pglob->gl_pathv[i] = new;
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