fs:ext4:write: Initialize cache aligned filename buffer

The filename buffer is allocated dynamically. It must be cache aligned.
Moreover, it is necessary to erase its content before we use it for
file name operations.

This prevents from corruption of written file names.

Signed-off-by: Lukasz Majewski <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>

diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index 64d8a6d9723a7eedb00bc918b6d6f258568c2f4d..f02c215ccc2e5676dd1c8fd6783b4d582ae32b69 100644 (file)
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -1011,8 +1011,6 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
        unsigned int blks_reqd_for_file;
        unsigned int blocks_remaining;
        int existing_file_inodeno;
-       char filename[256];
-
        char *temp_ptr = NULL;
        long int itable_blkno;
        long int parent_itable_blkno;
@@ -1021,6 +1019,9 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
        unsigned int inodes_per_block;
        unsigned int ibmap_idx;
        struct ext_filesystem *fs = get_fs();
+       ALLOC_CACHE_ALIGN_BUFFER(char, filename, 256);
+       memset(filename, 0x00, sizeof(filename));
+
        g_parent_inode = zalloc(sizeof(struct ext2_inode));
        if (!g_parent_inode)
                goto fail;