From nobody Sat Feb 7 11:38:03 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 38A0613CF8C; Sat, 10 Aug 2024 19:15:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723317304; cv=none; b=Wj24NEL3qiaU3N1AKcrWZc2plOl/Mas6lvUtpZWfcT+Ypv6QfU3+f494BR014k86ozy7I6sgzSq0FwRKbSm2SqjAW5VyEeUxLvM9UXH8rOcPHpTEI1T6wFnvRghEhYSwAo6YfnqDWpwGDG6S6+aFjDE8U2ZlF5sA8OHgn5WLCRY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723317304; c=relaxed/simple; bh=UfuaYCE9A6dy6rV17fG+J80wNjWQc0fQQISknMXjsMw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Nb2TE5p2D2BvpwsjRwy7ISsT0UHpvtqABQeppQFKSYfs9SjIOI4KObnZr5N0k1ah3ERYNKuaPFanseDgh8IDOBFfBrDysuvQF4VBkg16GzuDsDSPP649OXRD09+BiV6wL/7FjVzrbxysk2wDvUf70GhLqKzT6JZGPRIt+GgxRso= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MnxNLere; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MnxNLere" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 37991C32781; Sat, 10 Aug 2024 19:15:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723317303; bh=UfuaYCE9A6dy6rV17fG+J80wNjWQc0fQQISknMXjsMw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MnxNLeretaUXpQ9R9KAfa4HZTiKq/sqsYGNSjpn1SzfW/bWxHtXmWS1zjrhIhjpGR /pnZpxPIZpdy+YsJM+mUcRWK9jog1VdMzlwW9mVjMY0iOctKtSSj9A74fIhxvDfNWy INfQH6hJNOrNpdj/PboE6uqw5knYcMfcINq1SKAIhUUb/F3ZudyqbKuRp/66qCW2hv 7hNoThp3EbXYoAufwSZa8otO4D5DGVf8LlIbf3MrbhtMEC7G0M6L6uA2vv3b4ZjmYA br8fAGXnE3QhEwjQVsBUYEAa+0cEvbGPcESAppOFZw5WUtJR/Z1u6W+vHT+hOK7dPo Z0xK6J5JmncWw== From: Namhyung Kim To: Arnaldo Carvalho de Melo , Ian Rogers , Kan Liang Cc: Jiri Olsa , Adrian Hunter , Peter Zijlstra , Ingo Molnar , LKML , linux-perf-users@vger.kernel.org Subject: [PATCH] perf annotate-data: Fix a buffer overflow in TUI browser Date: Sat, 10 Aug 2024 12:15:02 -0700 Message-ID: <20240810191502.1947959-1-namhyung@kernel.org> X-Mailer: git-send-email 2.46.0.76.ge559c4bf1a-goog In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In get_member_overhead(), k is updated when it has a entry in the histogram. But the entry->hists array is allocated with the number of evsel in the group. So the k should be reset when it iterates the event using for_each_group_evsel(), otherwise it'd crash due to a buffer overflow. Fixes: cb1898f58e0f ("perf annotate-data: Support --skip-empty option") Signed-off-by: Namhyung Kim --- tools/perf/ui/browsers/annotate-data.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/perf/ui/browsers/annotate-data.c b/tools/perf/ui/browser= s/annotate-data.c index c3db80a7589a..a937b55da736 100644 --- a/tools/perf/ui/browsers/annotate-data.c +++ b/tools/perf/ui/browsers/annotate-data.c @@ -46,11 +46,12 @@ static int get_member_overhead(struct annotated_data_ty= pe *adt, struct annotated_member *member =3D entry->data; int i, k; =20 - for (i =3D 0, k =3D 0; i < member->size; i++) { + for (i =3D 0; i < member->size; i++) { struct type_hist *h; struct evsel *evsel; int offset =3D member->offset + i; =20 + k =3D 0; for_each_group_evsel(evsel, leader) { if (symbol_conf.skip_empty && evsel__hists(evsel)->stats.nr_samples =3D=3D 0) --=20 2.46.0.76.ge559c4bf1a-goog