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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 23 Apr 2020 16:08:54 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 03NF9UNw51445810 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Apr 2020 15:09:30 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 50F74AE053; Thu, 23 Apr 2020 15:09:30 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E10ACAE051; Thu, 23 Apr 2020 15:09:28 +0000 (GMT) Received: from naverao1-tp.ibmuc.com (unknown [9.85.73.158]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 23 Apr 2020 15:09:28 +0000 (GMT) From: "Naveen N. Rao" To: Subject: [PATCH 0/3] powerpc: Enhance error handling with patch_instruction() Date: Thu, 23 Apr 2020 20:39:01 +0530 X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20042315-0008-0000-0000-0000037617B1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20042315-0009-0000-0000-00004A97E538 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-04-23_10:2020-04-23, 2020-04-23 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 clxscore=1015 priorityscore=1501 mlxlogscore=534 impostorscore=0 mlxscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 suspectscore=1 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004230117 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: Steven Rostedt Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This patchset updates error handling with patch_instruction(). The first patch fixes an issue with do_patch_instruction() with STRICT_KERNEL_RWX wherein errors were not being returned back. The second and third patches update users of patch_instruction() in ftrace and kprobes code to properly validate return value from patch_instruction() and to notify errors. - Naveen Naveen N. Rao (3): powerpc: Properly return error code from do_patch_instruction() powerpc/ftrace: Simplify error checking when patching instructions powerpc/kprobes: Check return value of patch_instruction() arch/powerpc/kernel/kprobes.c | 10 ++- arch/powerpc/kernel/optprobes.c | 99 ++++++++++++++++++++++++------ arch/powerpc/kernel/trace/ftrace.c | 69 ++++++++++----------- arch/powerpc/lib/code-patching.c | 6 +- 4 files changed, 123 insertions(+), 61 deletions(-) base-commit: 8299da600ad05b8aa0f15ec0f5f03bd40e37d6f0 -- 2.25.1