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Wed, 28 Jul 2021 19:02:56 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 14145AE045; Wed, 28 Jul 2021 19:02:56 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 28 Jul 2021 19:02:56 +0000 (GMT) From: Heiko Carstens To: Marco Elver , Alexander Potapenko Cc: Sven Schnelle , Vasily Gorbik , Christian Borntraeger , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH 2/4] kfence: add function to mask address bits Date: Wed, 28 Jul 2021 21:02:52 +0200 Message-Id: <20210728190254.3921642-3-hca@linux.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210728190254.3921642-1-hca@linux.ibm.com> References: <20210728190254.3921642-1-hca@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: PzPFJxJ0ZhUBqUTiUpsv0108PjxM1qJg X-Proofpoint-GUID: 03zJ3GMQF9vyTBQdUuHj3O3iMZe1d4zM X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-07-28_09:2021-07-27,2021-07-28 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 mlxlogscore=999 priorityscore=1501 spamscore=0 mlxscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 clxscore=1015 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2107280106 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sven Schnelle s390 only reports the page address during a translation fault. To make the kfence unit tests pass, add a function that might be implemented by architectures to mask out address bits. Signed-off-by: Sven Schnelle Signed-off-by: Heiko Carstens --- mm/kfence/kfence_test.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/mm/kfence/kfence_test.c b/mm/kfence/kfence_test.c index 942cbc16ad26..eb6307c199ea 100644 --- a/mm/kfence/kfence_test.c +++ b/mm/kfence/kfence_test.c @@ -23,8 +23,15 @@ #include #include +#include + #include "kfence.h" +/* May be overridden by . */ +#ifndef arch_kfence_test_address +#define arch_kfence_test_address(addr) (addr) +#endif + /* Report as observed from console. */ static struct { spinlock_t lock; @@ -82,6 +89,7 @@ static const char *get_access_type(const struct expect_report *r) /* Check observed report matches information in @r. */ static bool report_matches(const struct expect_report *r) { + unsigned long addr = (unsigned long)r->addr; bool ret = false; unsigned long flags; typeof(observed.lines) expect; @@ -131,22 +139,25 @@ static bool report_matches(const struct expect_report *r) switch (r->type) { case KFENCE_ERROR_OOB: cur += scnprintf(cur, end - cur, "Out-of-bounds %s at", get_access_type(r)); + addr = arch_kfence_test_address(addr); break; case KFENCE_ERROR_UAF: cur += scnprintf(cur, end - cur, "Use-after-free %s at", get_access_type(r)); + addr = arch_kfence_test_address(addr); break; case KFENCE_ERROR_CORRUPTION: cur += scnprintf(cur, end - cur, "Corrupted memory at"); break; case KFENCE_ERROR_INVALID: cur += scnprintf(cur, end - cur, "Invalid %s at", get_access_type(r)); + addr = arch_kfence_test_address(addr); break; case KFENCE_ERROR_INVALID_FREE: cur += scnprintf(cur, end - cur, "Invalid free of"); break; } - cur += scnprintf(cur, end - cur, " 0x%p", (void *)r->addr); + cur += scnprintf(cur, end - cur, " 0x%p", (void *)addr); spin_lock_irqsave(&observed.lock, flags); if (!report_available()) -- 2.25.1