[PATCH 3/3] smb: client: use unaligned read for POSIX info name length

From: Zihan Xi <[email protected]>

posix_info_parse() reads the trailing name length via an aligned le32
cast at beg + total_len. Owner and group SID sizes are variable, so
that offset may be misaligned on strict-alignment architectures.

Fixes: 349e13ad30b4 ("cifs: add smb2 POSIX info level")
Cc: [email protected]
Signed-off-by: Zihan Xi <[email protected]>
Signed-off-by: Ren Wei <[email protected]>
---
 fs/smb/client/smb2pdu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
index ed782d219d55..43d514ee555d 100644
--- a/fs/smb/client/smb2pdu.c
+++ b/fs/smb/client/smb2pdu.c
@@ -5450,7 +5450,7 @@ int posix_info_parse(const void *beg, const void *end,
 	/* check name len */
 	if (beg + total_len + 4 > end)
 		return -1;
-	name_len = le32_to_cpu(*(__le32 *)(beg + total_len));
+	name_len = get_unaligned_le32((u8 *)beg + total_len);
 	if (name_len < 1 || name_len > 0xFFFF)
 		return -1;
 	total_len += 4;
-- 
2.43.0