5.15-stable review patch. If anyone has any objections, please let me know.
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From: Christian Göttsche cgzones@googlemail.com
commit 70d91dc9b2ac91327d0eefd86163abc3548effa6 upstream.
Set the next pointer in filename_trans_read_helper() before attaching the new node under construction to the list, otherwise garbage would be dereferenced on subsequent failure during cleanup in the out goto label.
Cc: stable@vger.kernel.org Fixes: 430059024389 ("selinux: implement new format of filename transitions") Signed-off-by: Christian Göttsche cgzones@googlemail.com Signed-off-by: Paul Moore paul@paul-moore.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- security/selinux/ss/policydb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/security/selinux/ss/policydb.c +++ b/security/selinux/ss/policydb.c @@ -2011,6 +2011,7 @@ static int filename_trans_read_helper(st if (!datum) goto out;
+ datum->next = NULL; *dst = datum;
/* ebitmap_read() will at least init the bitmap */ @@ -2023,7 +2024,6 @@ static int filename_trans_read_helper(st goto out;
datum->otype = le32_to_cpu(buf[0]); - datum->next = NULL;
dst = &datum->next; }