linux-ext4 - [PATCH] e2image: correct group descriptors size in ext2fs_image_super

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Date:   Fri, 14 Jul 2023 10:59:58 +1000
From:   Li Dongyang <dongyangli@....com>
To:     linux-ext4@...r.kernel.org
Cc:     adilger@...ger.ca, emoly@...mcloud.com
Subject: [PATCH] e2image: correct group descriptors size in ext2fs_image_super_read()

From: Emoly Liu <emoly@...mcloud.com>

In function ext2fs_image_super_read(), the size of block group
descriptors should be (fs->blocksize * fs->desc_blocks), but not
(fs->blocksize * fs->group_desc_count).

Signed-off-by: Emoly Liu <emoly@...mcloud.com>
---
 lib/ext2fs/imager.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/ext2fs/imager.c b/lib/ext2fs/imager.c
index 23290a6a..16b09770 100644
--- a/lib/ext2fs/imager.c
+++ b/lib/ext2fs/imager.c
@@ -299,7 +299,7 @@ errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd,
        ssize_t         actual, size;
        errcode_t       retval;

-       size = (ssize_t)fs->blocksize * (fs->group_desc_count + 1);
+       size = (ssize_t)fs->blocksize * (fs->desc_blocks + 1);
        buf = malloc(size);
        if (!buf)
                return ENOMEM;
@@ -323,7 +323,7 @@ errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd,
        memcpy(fs->super, buf, SUPERBLOCK_SIZE);

        memcpy(fs->group_desc, buf + fs->blocksize,
-              (ssize_t)fs->blocksize * fs->group_desc_count);
+              (ssize_t)fs->blocksize * fs->desc_blocks);

        retval = 0;

-- 
2.41.0