MIRRORS/linux-imx
1
0
Fork 0
mirror of https://github.com/nxp-imx/linux-imx.git synced 2025-07-06 01:15:20 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

ext4: ext4_search_dir should return a proper error

Browse Source 
[ Upstream commit cd69f8f9de ]

ext4_search_dir currently returns -1 in case of a failure, while it returns
0 when the name is not found. In such failure cases, it should return an
error code instead.

This becomes even more important when ext4_find_inline_entry returns an
error code as well in the next commit.

-EFSCORRUPTED seems appropriate as such error code as these failures would
be caused by unexpected record lengths and is in line with other instances
of ext4_check_dir_entry failures.

In the case of ext4_dx_find_entry, the current use of ERR_BAD_DX_DIR was
left as is to reduce the risk of regressions.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Link: https://patch.msgid.link/20240821152324.3621860-2-cascardo@igalia.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thadeu Lima de Souza Cascardo 2024-08-21 12:23:21 -03:00 committed by Greg Kroah-Hartman
parent b111ae42bb
commit 1fe2852720
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
fs/ext4/namei.c
View File

@ -1526,7 +1526,7 @@ static bool ext4_match(struct inode *parent,
} }
/* /*
* Returns 0 if not found, -1 on failure, and 1 on success * Returns 0 if not found, -EFSCORRUPTED on failure, and 1 on success
*/ */
int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size, int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size,
struct inode *dir, struct ext4_filename *fname, struct inode *dir, struct ext4_filename *fname,
@ -1547,7 +1547,7 @@ int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size,
* a full check */ * a full check */
if (ext4_check_dir_entry(dir, NULL, de, bh, search_buf, if (ext4_check_dir_entry(dir, NULL, de, bh, search_buf,
buf_size, offset)) buf_size, offset))
return -1; return -EFSCORRUPTED;
*res_dir = de; *res_dir = de;
return 1; return 1;
} }
@ -1555,7 +1555,7 @@ int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size,
de_len = ext4_rec_len_from_disk(de->rec_len, de_len = ext4_rec_len_from_disk(de->rec_len,
dir->i_sb->s_blocksize); dir->i_sb->s_blocksize);
if (de_len <= 0) if (de_len <= 0)
return -1; return -EFSCORRUPTED;
offset += de_len; offset += de_len;
de = (struct ext4_dir_entry_2 *) ((char *) de + de_len); de = (struct ext4_dir_entry_2 *) ((char *) de + de_len);
} }
@ -1707,8 +1707,10 @@ restart:
goto cleanup_and_exit; goto cleanup_and_exit;
} else { } else {
brelse(bh); brelse(bh);
if (i < 0) if (i < 0) {
ret = ERR_PTR(i);
goto cleanup_and_exit; goto cleanup_and_exit;
}
} }
next: next:
if (++block >= nblocks) if (++block >= nblocks)
@ -1803,7 +1805,7 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
if (retval == 1) if (retval == 1)
goto success; goto success;
brelse(bh); brelse(bh);
if (retval == -1) { if (retval < 0) {
bh = ERR_PTR(ERR_BAD_DX_DIR); bh = ERR_PTR(ERR_BAD_DX_DIR);
goto errout; goto errout;
} }