From: Sven Schnelle <svens@linux.ibm.com>
To: Marco Elver <elver@google.com>
Cc: linux-kernel@vger.kernel.org, Sven Schnelle <svens@linux.ibm.com>
Subject: [PATCH 2/2] kfence: only handle kernel mode faults
Date: Fri, 14 May 2021 11:21:39 +0200 [thread overview]
Message-ID: <20210514092139.3225509-3-svens@linux.ibm.com> (raw)
In-Reply-To: <20210514092139.3225509-1-svens@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
---
mm/kfence/core.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mm/kfence/core.c b/mm/kfence/core.c
index bc15e3cb71d5..161df492750c 100644
--- a/mm/kfence/core.c
+++ b/mm/kfence/core.c
@@ -813,6 +813,9 @@ bool kfence_handle_page_fault(unsigned long addr, bool is_write, struct pt_regs
enum kfence_error_type error_type;
unsigned long flags;
+ if (user_mode(regs))
+ return false;
+
if (!is_kfence_address((void *)addr))
return false;
--
2.25.1
next prev parent reply other threads:[~2021-05-14 9:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-14 9:21 [RFC] minor kfence patches Sven Schnelle
2021-05-14 9:21 ` [PATCH 1/2] kfence: add function to mask address bits Sven Schnelle
2021-05-14 10:54 ` Marco Elver
2021-05-14 11:03 ` Sven Schnelle
2021-05-14 11:23 ` Marco Elver
2021-05-14 9:21 ` Sven Schnelle [this message]
2021-05-14 10:52 ` [PATCH 2/2] kfence: only handle kernel mode faults Marco Elver
2021-05-14 10:55 ` Sven Schnelle
2021-05-14 10:59 ` Marco Elver
2021-05-14 10:56 ` [RFC] minor kfence patches Marco Elver
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210514092139.3225509-3-svens@linux.ibm.com \
--to=svens@linux.ibm.com \
--cc=elver@google.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.