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
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