From 96412e28e5c7ac2d15f1cff8c825330bbb60976e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Pierre=20Andr=C3=A9?= <jean-pierre.andre@wanadoo.fr>
Date: Tue, 10 May 2022 10:30:24 +0200
Subject: [PATCH] Fixed possible out-of-buffer condition in ntfsck

A bad usa_count could lead to an out-of-buffer condition. Just avoid
the issue and report the error, still not fix it.
---
 ntfsprogs/ntfsck.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ntfsprogs/ntfsck.c b/ntfsprogs/ntfsck.c
index d49f3f96..8c126411 100644
--- a/ntfsprogs/ntfsck.c
+++ b/ntfsprogs/ntfsck.c
@@ -616,7 +616,8 @@ static BOOL check_file_record(u8 *buffer, u16 buflen)
 
 	// Remove update seq & check it.
 	usa = *(u16*)(buffer+usa_ofs); // The value that should be at the end of every sector.
-	assert_u32_equal(usa_count-1, buflen/NTFS_BLOCK_SIZE, "USA length");
+	if (assert_u32_equal(usa_count-1, buflen/NTFS_BLOCK_SIZE, "USA length"))
+		return (1);
 	for (i=1;i<usa_count;i++) {
 		u16 *fixup = (u16*)(buffer+NTFS_BLOCK_SIZE*i-2); // the value at the end of the sector.
 		u16 saved_val = *(u16*)(buffer+usa_ofs+2*i); // the actual data value that was saved in the us array.