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Commit 159b0956 authored by Al Viro's avatar Al Viro
Browse files

make sure that fchdir() won't accept referral points, etc. 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 85128b2b

fs/open.c

+3 −6
Original line number Diff line number Diff line
@@ -459,20 +459,17 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename) 
SYSCALL_DEFINE1(fchdir, unsigned int, fd)

{

	struct fd f = fdget_raw(fd);

	struct inode *inode;

	int error = -EBADF;

	int error;



	error = -EBADF;

	if (!f.file)

		goto out;



	inode = file_inode(f.file);



	error = -ENOTDIR;

	if (!S_ISDIR(inode->i_mode))

	if (!d_can_lookup(f.file->f_path.dentry))

		goto out_putf;



	error = inode_permission(inode, MAY_EXEC | MAY_CHDIR);

	error = inode_permission(file_inode(f.file), MAY_EXEC | MAY_CHDIR);

	if (!error)

		set_fs_pwd(current->fs, &f.file->f_path);

out_putf: