Re: [PATCH] 2.5.50: unused code in link_path_walk()

[Matthew Wilcox <willy@debian.org>]

@@ -700,7 +700,6 @@
                                 if (this.name[1] != '.')
                                         break;
                                 follow_dotdot(&nd->mnt, &nd->dentry);
-				inode = nd->dentry->d_inode;
                                 /* fallthrough */
                         case 1:
                                 goto return_base;

seems broken to me.  if follow_dotdot() changes nd->dentry (can happen!),
inode needs to be changed.  look:

        inode = nd->dentry->d_inode;
        for(;;) {
                err = exec_permission_lite(inode);
                if (this.name[0] == '.') switch (this.len) {
                        case 2: 
                                if (this.name[1] != '.')
                                        break;
                                follow_dotdot(&nd->mnt, &nd->dentry);
                                inode = nd->dentry->d_inode;
                                /* fallthrough */
                        case 1:
                                continue;
                }
        }

btw, you should cc linux-fsdevel for patches to the VFS.

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