From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D944F330B30; Mon, 24 Aug 2026 09:25:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787563537; cv=none; b=fwLMkFtjr3RaCi3YrCWjxdlSlsvvV8Hx9MwSanpk8BIW0zfH8cv4lTxRgI7hm0+pgo3EvLpUbGiy0HX1Nx9aLQbv4SuHp6CTNmozQg4R50UcrNWFbmdnY1yr4dRbZE0OL1RV1vSlFH8/KNXlnguOiuuKsjntrYcLnEoVTKM0uQI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787563537; c=relaxed/simple; bh=MPoQp84nXC22s8TiMvn1SiJGBBw2acTM/YjZ8Yfnx74=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=V/PmsU2RoJ1SxAKq3MRR1r7AubNxb3xJ+UOgPnOyHhM5YMiEpWqfGZm15Ke4LVBopRlJiJmgXfEV3383nHA/TDQrLN2B1WuYcS0TPdMYbdWsHMUo/HQA79VNqz2oyDVD8IxtSWtqucbW7XWwiqdrYVowOCmquImLEtYiZfpKbos= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: bdd5e5e29f9d11f19a56ed5b684f684d-20260824 X-CTIC-Tags: HR_CC_COUNT, HR_CC_DOMAIN_COUNT, HR_CC_NO_NAME, HR_CTE_8B, HR_CTT_MISS HR_DATE_H, HR_DATE_WKD, HR_DATE_ZONE, HR_FROM_DIGIT_LEN, HR_FROM_NAME HR_SJ_LANG, HR_SJ_LEN, HR_SJ_LETTER, HR_SJ_NOR_SYM, HR_SJ_PHRASE HR_SJ_PHRASE_LEN, HR_SJ_WS, HR_TO_COUNT, HR_TO_DOMAIN_COUNT, HR_TO_NO_NAME IP_TRUSTED, SRC_TRUSTED, DN_TRUSTED, SA_TRUSTED, SA_EXISTED SN_TRUSTED, SN_EXISTED, SPF_NOPASS, DKIM_NOPASS, DMARC_NOPASS CIE_BAD, CIE_GOOD, CIE_GOOD_SPF, GTI_FG_BS, GTI_RG_INFO GTI_C_BU, AMN_GOOD, ABX_MISS_RDNS X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.19,REQID:85eab352-cc70-4756-9e57-25bd409b68c3,IP:15, URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:10 X-CID-INFO: VERSION:1.3.19,REQID:85eab352-cc70-4756-9e57-25bd409b68c3,IP:15,UR L:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:10 X-CID-META: VersionHash:7db8b62,CLOUDID:7692eb8e8be6c460c3f23840eda7afbd,BulkI D:260824170340422JT2AE,BulkQuantity:2,SF:17|19|38|66|78|102|127|850|865|89 8,TC:nil,Content:0|15|50,EDM:-3,IP:-2,URL:0,File:nil,RT:nil,Bulk:40,QS:nil ,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_FAS,TF_CID_SPAM_FSD X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: bdd5e5e29f9d11f19a56ed5b684f684d-20260824 X-User: wangyan01@kylinos.cn Received: from localhost.localdomain [(116.128.244.171)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA) with ESMTP id 1428413634; Mon, 24 Aug 2026 17:25:26 +0800 From: Wang Yan To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org Cc: mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, james.clark@linaro.org, atrajeev@linux.ibm.com, wangyan01@kylinos.cn, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH] perf powerpc-vpadtl: Validate dispatch/preempt reason indices before array access Date: Mon, 24 Aug 2026 17:25:13 +0800 Message-Id: <20260824092513.1149554-1-wangyan01@kylinos.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit powerpc_vpadtl_dump() indexes the dispatch_reasons[11] and preempt_reasons[10] string arrays using the u8 fields dtl->dispatch_reason and dtl->preempt_reason taken directly from the untrusted auxtrace payload. A crafted perf.data file can set either field to a value that exceeds the array bounds, causing an out-of-bounds read of a const char * pointer that is then passed to printf("%s"). Bound the indices with ARRAY_SIZE() and fall back to "unknown" when they are out of range, following the same defensive pattern used in amd-sample-raw.c for data_src_str[]. Fixes: c4bbd4ec2e50 ("perf powerpc: Process auxtrace events and display in 'perf report -D'") Cc: stable@vger.kernel.org Signed-off-by: Wang Yan --- tools/perf/util/powerpc-vpadtl.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/powerpc-vpadtl.c b/tools/perf/util/powerpc-vpadtl.c index 710f3093f3f9..6be04fbcd6b7 100644 --- a/tools/perf/util/powerpc-vpadtl.c +++ b/tools/perf/util/powerpc-vpadtl.c @@ -113,8 +113,10 @@ static void powerpc_vpadtl_dump(struct powerpc_vpadtl *vpa __maybe_unused, printf("dispatch_reason:%s, preempt_reason:%s, " "enqueue_to_dispatch_time:%d, ready_to_enqueue_time:%d, " "waiting_to_ready_time:%d\n", - dispatch_reasons[dtl->dispatch_reason], - preempt_reasons[dtl->preempt_reason], + dtl->dispatch_reason < ARRAY_SIZE(dispatch_reasons) + ? dispatch_reasons[dtl->dispatch_reason] : "unknown", + dtl->preempt_reason < ARRAY_SIZE(preempt_reasons) + ? preempt_reasons[dtl->preempt_reason] : "unknown", be32_to_cpu(dtl->enqueue_to_dispatch_time), be32_to_cpu(dtl->ready_to_enqueue_time), be32_to_cpu(dtl->waiting_to_ready_time)); -- 2.25.1