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fs: ext4: check the minimal partition size to mount
author
Patrick Delaunay
<patrick.delaunay@foss.st.com>
Wed, 8 Mar 2023 08:49:54 +0000
(09:49 +0100)
committer
Tom Rini
<trini@konsulko.com>
Wed, 22 Mar 2023 16:51:14 +0000
(12:51 -0400)
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>
fs/ext4/ext4_common.c
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diff --git
a/fs/ext4/ext4_common.c
b/fs/ext4/ext4_common.c
index
f50de7c
..
9a9c520
100644
(file)
--- 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;