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From: Masami Hiramatsu <mhiramat@kernel.org>
To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Cc: Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, Masami Hiramatsu <mhiramat@kernel.org>,
	Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
	"David S . Miller" <davem@davemloft.net>,
	Jon Medhurst <tixy@linaro.org>, Will Deacon <will.deacon@arm.com>,
	Arnd Bergmann <arnd@arndb.de>,
	David Howells <dhowells@redhat.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	"Tobin C . Harding" <me@tobin.cc>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Thomas Richter <tmricht@linux.ibm.com>,
	akpm@linux-foundation.org, acme@kernel.org, rostedt@goodmis.org,
	brueckner@linux.vnet.ibm.com, schwidefsky@de.ibm.com,
	stable@vger.kernel.org
Subject: [PATCH v3 1/7] kprobes: Make blacklist root user read only
Date: Fri, 27 Apr 2018 15:40:09 +0900	[thread overview]
Message-ID: <152481120919.22588.16126591608892708741.stgit@devbox> (raw)
In-Reply-To: <152481117776.22588.1210388093668905564.stgit@devbox>

Since the blacklist file indicates a sensitive address
information to reader, it should be restricted to the
root user.

Suggested-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 kernel/kprobes.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index ea619021d901..51096eece801 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -2621,7 +2621,7 @@ static int __init debugfs_kprobe_init(void)
 	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;

  reply	other threads:[~2018-04-27  6:40 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-27  6:39 [PATCH v3 0/7] kprobes: Fix %p in kprobes Masami Hiramatsu
2018-04-27  6:40 ` Masami Hiramatsu [this message]
2018-04-27  6:56   ` [PATCH v3 1/7] kprobes: Make blacklist root user read only Greg KH
2018-04-27 14:52     ` Masami Hiramatsu
2018-04-27  7:04   ` Ingo Molnar
2018-04-27 15:58     ` Masami Hiramatsu
2018-04-27  6:40 ` [PATCH v3 2/7] kprobes: Show blacklist addresses as same as kallsyms does Masami Hiramatsu
2018-04-27  7:14   ` Ingo Molnar
2018-04-27 16:10     ` Masami Hiramatsu
2018-04-27  6:41 ` [PATCH v3 3/7] kprobes: Show address of kprobes if " Masami Hiramatsu
2018-04-27  6:41 ` [PATCH v3 4/7] kprobes: Replace %p with other pointer types Masami Hiramatsu
2018-04-27  6:56   ` Ingo Molnar
2018-04-27 15:42     ` Masami Hiramatsu
2018-04-28  4:43       ` Masami Hiramatsu
2018-04-27  6:42 ` [PATCH v3 5/7] kprobes/x86: Fix %p uses in error messages Masami Hiramatsu
2018-04-27  6:58   ` Ingo Molnar
2018-04-27 15:06     ` Masami Hiramatsu
2018-04-27  6:42 ` [PATCH v3 6/7] kprobes/arm: " Masami Hiramatsu
2018-04-27  6:43 ` [PATCH v3 7/7] kprobes/arm64: " Masami Hiramatsu

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