From 5e78424f4a27c07be50e246308035c877f204038 Mon Sep 17 00:00:00 2001 From: Michal Sekletar Date: Mon, 13 Oct 2014 15:25:09 +0200 Subject: [PATCH] selinux: fix potential double free crash in child process Before returning from function we should reset ret to NULL, thus cleanup function is nop. Also context_str() returns pointer to a string containing context but not a copy, hence we must make copy it explicitly. --- src/shared/label.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git src/shared/label.c src/shared/label.c index b6af38d..69d4616 100644 --- src/shared/label.c +++ src/shared/label.c @@ -334,7 +334,7 @@ int label_get_child_mls_label(int socket_fd, const char *exe, char **label) { } freecon(mycon); - mycon = context_str(bcon); + mycon = strdup(context_str(bcon)); if (!mycon) { r = -errno; goto out; @@ -348,6 +348,7 @@ int label_get_child_mls_label(int socket_fd, const char *exe, char **label) { } *label = ret; + ret = NULL; r = 0; out: -- 1.7.9.2