4.18-stable review patch. If anyone has any objections, please let me know.
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From: Eric Sandeen sandeen@redhat.com
commit f39b3f45dbcb0343822cce31ea7636ad66e60bc2 upstream.
When ext4_find_entry() falls back to "searching the old fashioned way" due to a corrupt dx dir, it needs to reset the error code to NULL so that the nonstandard ERR_BAD_DX_DIR code isn't returned to userspace.
https://bugzilla.kernel.org/show_bug.cgi?id=199947
Reported-by: Anatoly Trosinenko anatoly.trosinenko@yandex.com Reviewed-by: Andreas Dilger adilger@dilger.ca Signed-off-by: Eric Sandeen sandeen@redhat.com Signed-off-by: Theodore Ts'o tytso@mit.edu Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/ext4/namei.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1398,6 +1398,7 @@ static struct buffer_head * ext4_find_en goto cleanup_and_exit; dxtrace(printk(KERN_DEBUG "ext4_find_entry: dx failed, " "falling back\n")); + ret = NULL; } nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb); if (!nblocks) {