Commit 18b0bbd8 authored Jul 14, 2006 by Linus Torvalds

Fix nasty /proc vulnerability



We have a bad interaction with both the kernel and user space being able
to change some of the /proc file status.  This fixes the most obvious
part of it, but I expect we'll also make it harder for users to modify
even their "own" files in /proc.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent ab6cf0d0

fs/proc/base.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1338,6 +1338,7 @@ static int pid_revalidate(struct dentry dentry, struct nameidata nd)
		} else {
		inode->i_uid = 0;
		inode->i_gid = 0;
		inode->i_mode = 0;
		}
		security_task_to_inode(task, inode);
		put_task_struct(task);