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Fix nasty /proc vulnerability

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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>
This commit is contained in:
Linus Torvalds 2006-07-14 16:51:34 -07:00
parent ab6cf0d0cb
commit 18b0bbd8ca
1 changed files with 1 additions and 0 deletions
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fs/proc/base.c
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@ -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);