From 578aed8391ef117ca64a9e0cba8e5c264368a0ec Mon Sep 17 00:00:00 2001
From: Frank Morgner <frankmorgner@gmail.com>
Date: Thu, 8 Dec 2022 00:27:18 +0100
Subject: [PATCH] sc_pkcs15init_rmdir: prevent out of bounds write

fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=53927
---
 src/pkcs15init/pkcs15-lib.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/pkcs15init/pkcs15-lib.c b/src/pkcs15init/pkcs15-lib.c
index 91cee37310..3df03c6e1f 100644
--- a/src/pkcs15init/pkcs15-lib.c
+++ b/src/pkcs15init/pkcs15-lib.c
@@ -685,6 +685,8 @@ sc_pkcs15init_rmdir(struct sc_pkcs15_card *p15card, struct sc_profile *profile,
 
 		path = df->path;
 		path.len += 2;
+		if (path.len > SC_MAX_PATH_SIZE)
+			return SC_ERROR_INTERNAL;
 
 		nfids = r / 2;
 		while (r >= 0 && nfids--) {
