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authorRich Felker <dalias@aerifal.cx>2015-02-23 00:35:47 -0500
committerRich Felker <dalias@aerifal.cx>2015-02-23 00:35:47 -0500
commitfc5a96c9c8aa186effad7520d5df6b616bbfd29d (patch)
treeeeeba8f6c0cfdeafaa5955e29104850a9d7c8c68 /src/passwd/getgr_r.c
parentd9da1fb8c592469431c764732d09f7756340190e (diff)
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fix crashes in refactored passwd/group code
the wrong condition was used in determining the presence of a result
that needs space/copying for the _r functions. a zero return value
does not necessarily mean success; it can also be a non-error negative
result: no such user/group.
Diffstat (limited to 'src/passwd/getgr_r.c')
-rw-r--r--src/passwd/getgr_r.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/passwd/getgr_r.c b/src/passwd/getgr_r.c
index 68b867d8..7246e8a4 100644
--- a/src/passwd/getgr_r.c
+++ b/src/passwd/getgr_r.c
@@ -16,11 +16,11 @@ static int getgr_r(const char *name, gid_t gid, struct group *gr, char *buf, siz
 	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
 
 	rv = __getgr_a(name, gid, gr, &line, &len, &mem, &nmem, res);
-	if (!rv && size < len + (nmem+1)*sizeof(char *) + 32) {
+	if (*res && size < len + (nmem+1)*sizeof(char *) + 32) {
 		*res = 0;
 		rv = ERANGE;
 	}
-	if (!rv) {
+	if (*res) {
 		buf += (16-(uintptr_t)buf)%16;
 		gr->gr_mem = (void *)buf;
 		buf += (nmem+1)*sizeof(char *);