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Fri, 14 May 2021 09:21:59 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Fri, 14 May 2021 09:21:59 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 55390) id D1787E05BC; Fri, 14 May 2021 11:21:58 +0200 (CEST) From: Sven Schnelle To: Marco Elver Cc: linux-kernel@vger.kernel.org, Sven Schnelle Subject: [PATCH 2/2] kfence: only handle kernel mode faults Date: Fri, 14 May 2021 11:21:39 +0200 Message-Id: <20210514092139.3225509-3-svens@linux.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210514092139.3225509-1-svens@linux.ibm.com> References: <20210514092139.3225509-1-svens@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: chwnlh6K2NWARONykIlWrooc2c2I2uX2 X-Proofpoint-ORIG-GUID: yb_aH7aRGvem5Y9aOKY9lX60fUh3Y1Nc X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-05-14_04:2021-05-12,2021-05-14 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 mlxlogscore=843 malwarescore=0 bulkscore=0 priorityscore=1501 mlxscore=0 suspectscore=0 impostorscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2105140070 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Sven Schnelle --- 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