Hi,
If the mode of a directory gets corrupted, check_filetype() makes wrong decisions for all its sub-directories. For example, using debugfs we can corrupt the mode of a directory to 0140755 (i.e. a socket). e2fsck will set the filetype of all its subdirectories as 6 (filetype for socket). All the subdirectories would be moved to lost+found, and in second run of e2fsck their filetype would be set back to 2.
By the time we come to check_filetype(), we have already verified the "." and ".." entries, so we special case these dirents in check_filetype().
Please consider for review.
Signed-off-by: Andreas Dilger <adilger@xxxxxxxxxxxxx>
Signed-off-by: Kalpak Shah <kalpak@xxxxxxxxxxxxx>
Index: e2fsprogs-1.39/e2fsck/pass2.c
===================================================================
--- e2fsprogs-1.39.orig/e2fsck/pass2.c
+++ e2fsprogs-1.39/e2fsck/pass2.c
@@ -495,7 +495,9 @@ static _INLINE_ int check_filetype(e2fsc
return 1;
}
- if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, dirent->inode)) {
+ if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, dirent->inode) ||
+ ((dirent->name_len && 0xFF) <= 2 && dirent->name[0] == '.' &&
+ (dirent->name[1] == '.' || dirent->name[1] == '\0'))) {
should_be = EXT2_FT_DIR;
} else if (ext2fs_test_inode_bitmap(ctx->inode_reg_map,
dirent->inode)) {
-
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
