From ed99135f7621459ef873991115372ba1afe88a04 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20G=C3=B6ttsche?= <cgzones@googlemail.com>
Date: Thu, 11 May 2023 14:31:47 +0200
Subject: [PATCH] selinux: keep context struct members in sync
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Commit 53f3517ae087 ("selinux: do not leave dangling pointer behind")
reset the `str` field of the `context` struct in an OOM error branch.
In this struct the fields `str` and `len` are coupled and should be kept
in sync. Set the length to zero according to the string be set to NULL.
Fixes: 53f3517ae087 ("selinux: do not leave dangling pointer behind")
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
---
security/selinux/ss/context.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/security/selinux/ss/context.h b/security/selinux/ss/context.h
index 44179977f434c..aed704b8c6426 100644
--- a/security/selinux/ss/context.h
+++ b/security/selinux/ss/context.h
@@ -168,6 +168,7 @@ static inline int context_cpy(struct context *dst, const struct context *src)
if (rc) {
kfree(dst->str);
dst->str = NULL;
+ dst->len = 0;
return rc;
}
return 0;
--
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