4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Masami Hiramatsu <mhiramat@xxxxxxxxxx> commit f2a3ab36077222437b4826fc76111caa14562b7c upstream. Since the blacklist and list files on debugfs indicates a sensitive address information to reader, it should be restricted to the root user. Suggested-by: Thomas Richter <tmricht@xxxxxxxxxxxxx> Suggested-by: Ingo Molnar <mingo@xxxxxxxxxx> Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Cc: Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@xxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: David Howells <dhowells@xxxxxxxxxx> Cc: David S . Miller <davem@xxxxxxxxxxxxx> Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx> Cc: Jon Medhurst <tixy@xxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Tobin C . Harding <me@xxxxxxxx> Cc: Will Deacon <will.deacon@xxxxxxx> Cc: acme@xxxxxxxxxx Cc: akpm@xxxxxxxxxxxxxxxxxxxx Cc: brueckner@xxxxxxxxxxxxxxxxxx Cc: linux-arch@xxxxxxxxxxxxxxx Cc: rostedt@xxxxxxxxxxx Cc: schwidefsky@xxxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx Link: https://lkml.kernel.org/lkml/152491890171.9916.5183693615601334087.stgit@devbox Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/kprobes.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -2441,7 +2441,7 @@ static int __init debugfs_kprobe_init(vo if (!dir) return -ENOMEM; - file = debugfs_create_file("list", 0444, dir, NULL, + file = debugfs_create_file("list", 0400, dir, NULL, &debugfs_kprobes_operations); if (!file) goto error; @@ -2451,7 +2451,7 @@ static int __init debugfs_kprobe_init(vo if (!file) goto error; - file = debugfs_create_file("blacklist", 0444, dir, NULL, + file = debugfs_create_file("blacklist", 0400, dir, NULL, &debugfs_kprobe_blacklist_ops); if (!file) goto error;
