From: Eric W. Biederman Date: Mon, 26 Jun 2006 07:25:43 +0000 (-0700) Subject: [PATCH] proc: Simplify the ownership rules for /proc X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=87bfbf679ffb1e95dd9ada694f66aafc4bfa5959;p=openwrt%2Fstaging%2Fblogic.git [PATCH] proc: Simplify the ownership rules for /proc Currently in /proc if the task is dumpable all of files are owned by the tasks effective users. Otherwise the files are owned by root. Unless it is the /proc// or /proc//task/ directory in that case we always make the directory owned by the effective user. However the special case for directories is pointless except as a way to read the effective user, because the permissions on both of those directories are world readable, and executable. /proc//status provides a much better way to read a processes effecitve userid, so it is silly to try to provide that on the directory. So this patch simplifies the code by removing a pointless special case and gets us one step closer to being able to remove the hard coded /proc inode numbers. Signed-off-by: Eric W. Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/fs/proc/base.c b/fs/proc/base.c index 0762bc34d98b..fa0e6bee40fa 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1371,7 +1371,7 @@ static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_st ei->type = ino; inode->i_uid = 0; inode->i_gid = 0; - if (ino == PROC_TGID_INO || ino == PROC_TID_INO || task_dumpable(task)) { + if (task_dumpable(task)) { inode->i_uid = task->euid; inode->i_gid = task->egid; } @@ -1400,7 +1400,7 @@ static int pid_revalidate(struct dentry *dentry, struct nameidata *nd) struct inode *inode = dentry->d_inode; struct task_struct *task = proc_task(inode); if (pid_alive(task)) { - if (proc_type(inode) == PROC_TGID_INO || proc_type(inode) == PROC_TID_INO || task_dumpable(task)) { + if (task_dumpable(task)) { inode->i_uid = task->euid; inode->i_gid = task->egid; } else {