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