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GET /api/patches/2226640/?format=api
{ "id": 2226640, "url": "http://patchwork.ozlabs.org/api/patches/2226640/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260422173545.73144-1-atrajeev@linux.ibm.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260422173545.73144-1-atrajeev@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260422173545.73144-1-atrajeev@linux.ibm.com/", "date": "2026-04-22T17:35:45", "name": "perf sched: Fix crash in sched stats diff due to uninitialized perf_data structure", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "ad6b6fbe3357a4f0efc1deb4a06ec4bb5ce1abee", "submitter": { "id": 90290, "url": "http://patchwork.ozlabs.org/api/people/90290/?format=api", "name": "Athira Rajeev", "email": "atrajeev@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260422173545.73144-1-atrajeev@linux.ibm.com/mbox/", "series": [ { "id": 501052, "url": "http://patchwork.ozlabs.org/api/series/501052/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=501052", "date": "2026-04-22T17:35:45", "name": "perf sched: Fix crash in sched stats diff due to uninitialized perf_data structure", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501052/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226640/comments/", "check": "success", "checks": "http://patchwork.ozlabs.org/api/patches/2226640/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19973-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=i7EOUKez;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; helo=lists.ozlabs.org;\n envelope-from=linuxppc-dev+bounces-19973-incoming=patchwork.ozlabs.org@lists.ozlabs.org;\n receiver=patchwork.ozlabs.org)", "lists.ozlabs.org;\n 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b=i7EOUKezNPThLibWCTqm9JzX1lp+JxOtgcYWCSBB1wbgsfCWv/UaWSP6K\n\tjLKePsQCWhRTl/MSS/ouZVuZ5nccm1Tof1388I+qHgnZzpc0i4A9RpiVyOtGmZVJ\n\tBrsvBSc2tWKiYp+lLW7T85f+xwNOOlV+H4FoVoev8BkM/URWLsx4LOrxxTv4k2vS\n\tG3i8oKknqQYcoBb9ncdN1dMC91bvoQpNzhWBg4hd1xZTN8PEuRTZsgjdDiXWZjSQ\n\tMklf0qrLz1PAllob4kW/29/0IrW5DzJ/jT9526QobFAvEeG+za6+FGpiPvpcRMTu\n\tyNz2FbyatguckwVrSQyQ0mXOcKD4A==", "From": "Athira Rajeev <atrajeev@linux.ibm.com>", "To": "acme@kernel.org, jolsa@kernel.org, adrian.hunter@intel.com,\n mpetlan@redhat.com, tmricht@linux.ibm.com, maddy@linux.ibm.com,\n irogers@google.com, namhyung@kernel.org", "Cc": "linux-perf-users@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,\n atrajeev@linux.ibm.com, hbathini@linux.vnet.ibm.com,\n Tejas.Manhas1@ibm.com, Tanushree.Shah@ibm.com, Shivani.Nittor@ibm.com", "Subject": "[PATCH] perf sched: Fix crash in sched stats diff due to\n uninitialized perf_data structure", "Date": "Wed, 22 Apr 2026 23:05:45 +0530", "Message-Id": "<20260422173545.73144-1-atrajeev@linux.ibm.com>", "X-Mailer": "git-send-email 2.39.5 (Apple Git-154)", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-TM-AS-GCONF": "00", "X-Proofpoint-Reinject": "loops=2 maxloops=12", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDIyMDE2NyBTYWx0ZWRfXz7XoSV/kWtvR\n YznATFeblMFplDhVI5eegDomNE30dm7QopcRBNthuIZSQ26z0MDEYeF3gw3m/SPoAy6CyfmRx0Y\n lgMUCRaJpyetNy/6ib6yhDOL14Srp0o3Xaos5r9xScB1HOVfNTNOoRXA77pSEDymYuwgOb/SRyT\n QULz66Z4YbiQhj/5q7Psdkr3/dx1k4YwNtifVks0/Q+CeS1TNsU4nyl2tcicY6cRFdyPriq7Yjj\n dAj+KkgbhP/W5S1vKj1qC+FM6MI6SPFsjnMn7QfvBJj61JPz56zgAUQOnCCHSo5SFDgKJRIBodL\n 5urd01EUcKWxXGI79+bpQLMfv8oPQywlncjGEKBACGLDB9zJQTn4iH6mQP77owVuWq6mpMpbm4z\n dBU4YMfswRY+uhp0CfhmhJaNL1RUo4q8yLUddU4nDYyMmkwRPgoPChnDKrD1+eXd5V0PgvdKPVv\n sZURajTxo+zFlOmHcjg==", "X-Proofpoint-ORIG-GUID": "kO37_hnscnMYR81Tnn_nPId96kExk12C", "X-Proofpoint-GUID": "NM2Xa-JT7Lu4q0-Md1peximJP9oTjLfd", "X-Authority-Analysis": "v=2.4 cv=XMUAjwhE c=1 sm=1 tr=0 ts=69e90713 cx=c_pps\n a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=gqBEGFNiBRC4Mxh7sp8A:9", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-22_02,2026-04-21_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n malwarescore=0 clxscore=1015 priorityscore=1501 impostorscore=0 bulkscore=0\n spamscore=0 lowpriorityscore=0 phishscore=0 adultscore=0 suspectscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604220167", "X-Spam-Status": "No, score=-0.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tRCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,\n\tSPF_PASS autolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "perf sched stats diff fails sometimes with below logs:\n\n # perf sched stats record ls\n\n # perf sched stats diff\n *** invalid open64 call: O_CREAT or O_TMPFILE without mode ***: terminated\n Aborted (core dumped)\n\nAlso in some runs, perf sched stats tests fails\n\n ./perf test \"perf sched stats tests\"\n 92: perf sched stats tests : FAILED!\n\n==172375== Conditional jump or move depends on uninitialised value(s)\n==172375== at 0x10393BD0: open_file_read (data.c:264)\n==172375== by 0x10393F63: open_file (data.c:317)\n==172375== by 0x10394067: open_file_dup (data.c:334)\n==172375== by 0x103942DF: perf_data__open (data.c:379)\n==172375== by 0x102F7CAF: __perf_session__new (session.c:169)\n==172375== by 0x100B5E63: perf_session__new (session.h:116)\n==172375== by 0x100D5D37: perf_sched__schedstat_diff (builtin-sched.c:4568)\n==172375== by 0x100D7D6F: cmd_sched (builtin-sched.c:5061)\n==172375== by 0x1010231F: run_builtin (perf.c:348)\n==172375== by 0x1010262F: handle_internal_command (perf.c:398)\n==172375== by 0x1010286F: run_argv (perf.c:442)\n==172375== by 0x10102C67: main (perf.c:549)\n==172375==\n==172375== Conditional jump or move depends on uninitialised value(s)\n==172375== at 0x10393D20: open_file_read (data.c:282)\n==172375== by 0x10393F63: open_file (data.c:317)\n==172375== by 0x10394067: open_file_dup (data.c:334)\n==172375== by 0x103942DF: perf_data__open (data.c:379)\n==172375== by 0x102F7CAF: __perf_session__new (session.c:169)\n==172375== by 0x100B5E63: perf_session__new (session.h:116)\n==172375== by 0x100D5D37: perf_sched__schedstat_diff (builtin-sched.c:4568)\n==172375== by 0x100D7D6F: cmd_sched (builtin-sched.c:5061)\n==172375== by 0x1010231F: run_builtin (perf.c:348)\n==172375== by 0x1010262F: handle_internal_command (perf.c:398)\n==172375== by 0x1010286F: run_argv (perf.c:442)\n==172375== by 0x10102C67: main (perf.c:549)\n\nThe valgrind logs and error message from the logs points to\nbelow snippet:\n\n static int open_file_read(struct perf_data *data)\n {\n int flags = data->in_place_update ? O_RDWR : O_RDONLY;\n struct stat st;\n int fd;\n\n fd = open(data->file.path, flags);\n\nThe \"struct perf_data\" is defined here :\n\n static int perf_sched__schedstat_diff(struct perf_sched *sched,\n int argc, const char **argv)\n {\n struct cpu_domain_map **cd_map0 = NULL, **cd_map1 = NULL;\n struct list_head cpu_head_ses0, cpu_head_ses1;\n struct perf_session *session[2];\n struct perf_data data[2];\n int ret = 0, err = 0;\n static const char *defaults[] = {\n \"perf.data.old\",\n \"perf.data\",\n };\n\nHere due to uninitialized \"struct perf_data\", the arguments to \"open\"\nis getting wrongly passed sometimes depending on value in stack.\nWhen perf_data__open() function calls open_file_read(),the\n\"in_place_update\" could contain garbage value.\n\nAfter initializing \"struct perf_data\" in perf_sched__schedstat_diff() function,\nperf sched stats tests runs without issues in multiple attempts and also\n\"perf sched stats diff\" ran individual without issues.\n\nfor i in {0..20}; do ./perf test \"perf sched stats tests\"; done\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n 92: perf sched stats tests : Ok\n\nSigned-off-by: Athira Rajeev <atrajeev@linux.ibm.com>\n---\n tools/perf/builtin-sched.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c\nindex 555247568e7a..5d2740099eed 100644\n--- a/tools/perf/builtin-sched.c\n+++ b/tools/perf/builtin-sched.c\n@@ -4538,7 +4538,7 @@ static int perf_sched__schedstat_diff(struct perf_sched *sched,\n \tstruct cpu_domain_map **cd_map0 = NULL, **cd_map1 = NULL;\n \tstruct list_head cpu_head_ses0, cpu_head_ses1;\n \tstruct perf_session *session[2];\n-\tstruct perf_data data[2];\n+\tstruct perf_data data[2] = { 0 };\n \tint ret = 0, err = 0;\n \tstatic const char *defaults[] = {\n \t\t\"perf.data.old\",\n", "prefixes": [] }