From: Tom Rix trix@redhat.com
commit 65de50969a77509452ae590e9449b70a22b923bb upstream.
Clang's static analysis tool reports these double free memory errors.
security/selinux/ss/services.c:2987:4: warning: Attempt to free released memory [unix.Malloc] kfree(bnames[i]); ^~~~~~~~~~~~~~~~ security/selinux/ss/services.c:2990:2: warning: Attempt to free released memory [unix.Malloc] kfree(bvalues); ^~~~~~~~~~~~~~
So improve the security_get_bools error handling by freeing these variables and setting their return pointers to NULL and the return len to 0
Cc: stable@vger.kernel.org Signed-off-by: Tom Rix trix@redhat.com Acked-by: Stephen Smalley stephen.smalley.work@gmail.com Signed-off-by: Paul Moore paul@paul-moore.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- security/selinux/ss/services.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index bfc4ffa1fa1a4..6ca297821d459 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -2616,8 +2616,12 @@ int security_get_bools(int *len, char ***names, int **values) if (*names) { for (i = 0; i < *len; i++) kfree((*names)[i]); + kfree(*names); } kfree(*values); + *len = 0; + *names = NULL; + *values = NULL; goto out; }