4.4-stable review patch. If anyone has any objections, please let me know.
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From: Masami Hiramatsu mhiramat@kernel.org
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@linux.ibm.com Suggested-by: Ingo Molnar mingo@kernel.org Signed-off-by: Masami Hiramatsu mhiramat@kernel.org Cc: Ananth N Mavinakayanahalli ananth@in.ibm.com Cc: Anil S Keshavamurthy anil.s.keshavamurthy@intel.com Cc: Arnd Bergmann arnd@arndb.de Cc: David Howells dhowells@redhat.com Cc: David S . Miller davem@davemloft.net Cc: Heiko Carstens heiko.carstens@de.ibm.com Cc: Jon Medhurst tixy@linaro.org Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: Tobin C . Harding me@tobin.cc Cc: Will Deacon will.deacon@arm.com Cc: acme@kernel.org Cc: akpm@linux-foundation.org Cc: brueckner@linux.vnet.ibm.com Cc: linux-arch@vger.kernel.org Cc: rostedt@goodmis.org Cc: schwidefsky@de.ibm.com Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/lkml/152491890171.9916.5183693615601334087.stgit@dev... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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;