From: Patrick Delaunay <patrick.delaunay@foss.st.com>
Date: Wed, 8 Mar 2023 08:49:54 +0000 (+0100)
Subject: fs: ext4: check the minimal partition size to mount
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=9905cae65e03;p=u-boot.git

fs: ext4: check the minimal partition size to mount

No need to mount a too small partition to handle a EXT4 file system.

This patch add a test on partition size before to read the
SUPERBLOCK_SIZE buffer and avoid error latter in fs_devread() function.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
---

diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index f50de7c089..9a9c520e22 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -2373,6 +2373,10 @@ int ext4fs_mount(unsigned part_length)
 	struct ext2_data *data;
 	int status;
 	struct ext_filesystem *fs = get_fs();
+
+	if (part_length < SUPERBLOCK_SIZE)
+		return 0;
+
 	data = zalloc(SUPERBLOCK_SIZE);
 	if (!data)
 		return 0;