[PATCH 4/7] procfs privacy: /proc/bus & /proc/net directory entries

["Lorenzo Hernández García-Hierro" <lorenzo@gnu.org>]

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This patch changes the permissions of the /proc/net and /proc/bus
directory entries so non-root users are restricted from accessing them.

It's also available at:
http://pearls.tuxedo-es.org/patches/security/proc-privacy-1_fs_proc_root.c.patch

-- 
Lorenzo Hernández García-Hierro <lorenzo@gnu.org> 
[1024D/6F2B2DEC] & [2048g/9AE91A22][http://tuxedo-es.org]

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diff -puN fs/proc/root.c~proc-privacy-1 fs/proc/root.c
--- linux-2.6.11/fs/proc/root.c~proc-privacy-1	2005-04-17 18:02:38.832911840 +0200
+++ linux-2.6.11-lorenzo/fs/proc/root.c	2005-04-17 18:03:59.102708976 +0200
@@ -52,7 +52,7 @@ void __init proc_root_init(void)
 		return;
 	}
 	proc_misc_init();
-	proc_net = proc_mkdir("net", NULL);
+	proc_net = proc_mkdir_mode("net", S_IRUSR | S_IXUSR, NULL);
 	proc_net_stat = proc_mkdir("net/stat", NULL);
 
 #ifdef CONFIG_SYSVIPC
@@ -76,7 +76,7 @@ void __init proc_root_init(void)
 #ifdef CONFIG_PROC_DEVICETREE
 	proc_device_tree_init();
 #endif
-	proc_bus = proc_mkdir("bus", NULL);
+	proc_bus = proc_mkdir_mode("bus", S_IRUSR | S_IXUSR, NULL);
 }
 
 static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)

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