Merge v6.18.39linux-rolling-lts

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 5 deletions

diff --git a/fs/exfat/dir.c b/fs/exfat/dir.c
index 97f2ff87220f..e1b28c1a7e85 100644
--- a/fs/exfat/dir.c
+++ b/fs/exfat/dir.c
@@ -1083,6 +1083,7 @@ rewind:
 
 			if (entry_type == TYPE_EXTEND) {
 				unsigned short entry_uniname[16], unichar;
+				unsigned int offset;
 
 				if (step != DIRENT_STEP_NAME ||
 				    name_len >= MAX_NAME_LENGTH) {
@@ -1091,13 +1092,15 @@ rewind:
 					continue;
 				}
 
-				if (++order == 2)
-					uniname = p_uniname->name;
-				else
-					uniname += EXFAT_FILE_NAME_LEN;
-
+				offset = (++order - 2) * EXFAT_FILE_NAME_LEN;
 				len = exfat_extract_uni_name(ep, entry_uniname);
 				brelse(bh);
+				if (offset > MAX_NAME_LENGTH ||
+				    len > MAX_NAME_LENGTH - offset) {
+					step = DIRENT_STEP_FILE;
+					continue;
+				}
+				uniname = p_uniname->name + offset;
 				name_len += len;
 
 				unichar = *(uniname+len);