From 6a78cf94218fc156442449adef479d5330499d8d Mon Sep 17 00:00:00 2001
From: safocl <safocl88@gmail.com>
Date: Thu, 30 Jan 2025 07:50:06 +0400
Subject: [PATCH] fix: nullptr dereferencing

some code contained nullptr dereferencing
---
 ntfsprogs/cluster.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ntfsprogs/cluster.c b/ntfsprogs/cluster.c
index 82188f4c..d8e1ff13 100644
--- a/ntfsprogs/cluster.c
+++ b/ntfsprogs/cluster.c
@@ -56,6 +56,10 @@ int cluster_find(ntfs_volume *vol, LCN c_begin, LCN c_end, cluster_cb *cb, void
 		return -1;
 
 	m_ctx = mft_get_search_ctx(vol);
+
+	if (!m_ctx)
+		return -1;
+
 	m_ctx->flags_search = FEMR_IN_USE | FEMR_BASE_RECORD;
 	count = 0;