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Thu, 10 Jun 2021 08:36:06 +0000 (GMT) Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0B6D66A047; Thu, 10 Jun 2021 08:36:03 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.102.3.162]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 10 Jun 2021 08:36:02 +0000 (GMT) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org Subject: [PATCH 2/6] selftest/mremap_test: Avoid crash with static build Date: Thu, 10 Jun 2021 14:05:45 +0530 Message-Id: <20210610083549.386085-3-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210610083549.386085-1-aneesh.kumar@linux.ibm.com> References: <20210610083549.386085-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Wlo1hD6BRWzjXS2kDTKSFCKUlvyH_8qa X-Proofpoint-ORIG-GUID: EIgzm296MGr_4W4ZRcGf491RsliOyWmr X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.761 definitions=2021-06-10_03:2021-06-10, 2021-06-10 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 clxscore=1015 impostorscore=0 suspectscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 bulkscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106100055 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Aneesh Kumar K.V" , Linus Torvalds , npiggin@gmail.com, kaleshsingh@google.com, joel@joelfernandes.org, "Kirill A . Shutemov" , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" With a large mmap map size, we can overlap with the text area and using MAP_FIXED results in unmapping that area. Switch to MAP_FIXED_NOREPLACE and handle the EEXIST error. Reviewed-by: Kalesh Singh Signed-off-by: Aneesh Kumar K.V --- tools/testing/selftests/vm/mremap_test.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/vm/mremap_test.c b/tools/testing/selftests/vm/mremap_test.c index c9a5461eb786..0624d1bd71b5 100644 --- a/tools/testing/selftests/vm/mremap_test.c +++ b/tools/testing/selftests/vm/mremap_test.c @@ -75,9 +75,10 @@ static void *get_source_mapping(struct config c) retry: addr += c.src_alignment; src_addr = mmap((void *) addr, c.region_size, PROT_READ | PROT_WRITE, - MAP_FIXED | MAP_ANONYMOUS | MAP_SHARED, -1, 0); + MAP_FIXED_NOREPLACE | MAP_ANONYMOUS | MAP_SHARED, + -1, 0); if (src_addr == MAP_FAILED) { - if (errno == EPERM) + if (errno == EPERM || errno == EEXIST) goto retry; goto error; } -- 2.31.1