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-rw-r--r--winsup/cygwin/security.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/winsup/cygwin/security.cc b/winsup/cygwin/security.cc
index 3a40af574..044d85b8e 100644
--- a/winsup/cygwin/security.cc
+++ b/winsup/cygwin/security.cc
@@ -106,7 +106,7 @@ convert_string_sid_to_sid (PSID psid, const char *sid_str)
BOOL
get_pw_sid (PSID sid, struct passwd *pw)
{
- char *sp = strrchr (pw->pw_gecos, ',');
+ char *sp = pw->pw_gecos ? strrchr (pw->pw_gecos, ',') : NULL;
if (!sp)
return FALSE;