From mboxrd@z Thu Jan 1 00:00:00 1970 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 6ABE32BD585; Mon, 5 May 2025 22:46:29 +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=1746485191; cv=none; b=gczajIXzeRCRyY8/hYeP2JMdkDalKoYyUSFBuk4UDQeWIuKkkaoLmAeKga4uP0s32uxnluJnmU3XsWUf2+XnUC7kU8irlt+ly8OupyXUDdwR9jqlhBVzPQ1R3NmUbZ/kXNt0OW0JJH5ceDiaFStImwvJldTtt4vIM1cjVDdXvJ8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746485191; c=relaxed/simple; bh=Nb9WwKqb2w5KCbCEHMmkoXMoM7qE9XNWo3xQoG4YWSc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ZsA3I62bOPJ8+J1kiC69gxXqhe7MSpbBhaHVC6UrVngj6bQDw2fgPwiff2mSt72TW+qKJcoNQ1Csw+o1iTbi5j94vYq1OY9QNMb9zq3M3SzP8SPdkPpwogwDxQV4pTzHmFwUJJsJVJZ19RwytKW7fUi/oXmsYgfIvmw03Ow6qXk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iblX7p40; 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="iblX7p40" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AA247C4CEEF; Mon, 5 May 2025 22:46:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746485189; bh=Nb9WwKqb2w5KCbCEHMmkoXMoM7qE9XNWo3xQoG4YWSc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iblX7p408hqdLmDLKjYJEfKId/zMU/4uE4ufAYa3RB3XHh+Yq4SCakS0CKZ/k9pnX Szy/Lvjfh101ZQkWOhnduewTfsllCQIw/87Aaao8lXsNPnRNznuWUDk6snOXg+hwfd Zj1X0tImVZYGgFNNoiClvirKdugGZ6xh9bpZM0B+DEwuBnEueYXcsH6f0vulC53iy5 yrnehDh2mHU5XiA1xXAF4bpgKj+cAAnKrUOq17tdQDxNhaUcCMBP1MRKygCN6yxZEi r9WAzIi3RiLomGVhnGNfQ9Y/slKIqPHSytAWuXESDj02qGqHPgiydy9vNxXnT0jjoE iTYlGw737Q1Nw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Peter Zijlstra , Ingo Molnar , Ravi Bangoria , Sasha Levin , mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, linux-perf-users@vger.kernel.org Subject: [PATCH AUTOSEL 6.12 202/486] perf/core: Clean up perf_try_init_event() Date: Mon, 5 May 2025 18:34:38 -0400 Message-Id: <20250505223922.2682012-202-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505223922.2682012-1-sashal@kernel.org> References: <20250505223922.2682012-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.26 Content-Transfer-Encoding: 8bit From: Peter Zijlstra [ Upstream commit da02f54e81db2f7bf6af9d1d0cfc5b41ec6d0dcb ] Make sure that perf_try_init_event() doesn't leave event->pmu nor event->destroy set on failure. Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Acked-by: Ravi Bangoria Link: https://lore.kernel.org/r/20250205102449.110145835@infradead.org Signed-off-by: Sasha Levin --- kernel/events/core.c | 65 ++++++++++++++++++++++++++------------------ 1 file changed, 38 insertions(+), 27 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index edafe9fc4bdd0..19dde12f23b83 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -11978,40 +11978,51 @@ static int perf_try_init_event(struct pmu *pmu, struct perf_event *event) if (ctx) perf_event_ctx_unlock(event->group_leader, ctx); - if (!ret) { - if (!(pmu->capabilities & PERF_PMU_CAP_EXTENDED_REGS) && - has_extended_regs(event)) - ret = -EOPNOTSUPP; + if (ret) + goto err_pmu; - if (pmu->capabilities & PERF_PMU_CAP_NO_EXCLUDE && - event_has_any_exclude_flag(event)) - ret = -EINVAL; + if (!(pmu->capabilities & PERF_PMU_CAP_EXTENDED_REGS) && + has_extended_regs(event)) { + ret = -EOPNOTSUPP; + goto err_destroy; + } - if (pmu->scope != PERF_PMU_SCOPE_NONE && event->cpu >= 0) { - const struct cpumask *cpumask = perf_scope_cpu_topology_cpumask(pmu->scope, event->cpu); - struct cpumask *pmu_cpumask = perf_scope_cpumask(pmu->scope); - int cpu; - - if (pmu_cpumask && cpumask) { - cpu = cpumask_any_and(pmu_cpumask, cpumask); - if (cpu >= nr_cpu_ids) - ret = -ENODEV; - else - event->event_caps |= PERF_EV_CAP_READ_SCOPE; - } else { - ret = -ENODEV; - } - } + if (pmu->capabilities & PERF_PMU_CAP_NO_EXCLUDE && + event_has_any_exclude_flag(event)) { + ret = -EINVAL; + goto err_destroy; + } - if (ret && event->destroy) - event->destroy(event); + if (pmu->scope != PERF_PMU_SCOPE_NONE && event->cpu >= 0) { + const struct cpumask *cpumask; + struct cpumask *pmu_cpumask; + int cpu; + + cpumask = perf_scope_cpu_topology_cpumask(pmu->scope, event->cpu); + pmu_cpumask = perf_scope_cpumask(pmu->scope); + + ret = -ENODEV; + if (!pmu_cpumask || !cpumask) + goto err_destroy; + + cpu = cpumask_any_and(pmu_cpumask, cpumask); + if (cpu >= nr_cpu_ids) + goto err_destroy; + + event->event_caps |= PERF_EV_CAP_READ_SCOPE; } - if (ret) { - event->pmu = NULL; - module_put(pmu->module); + return 0; + +err_destroy: + if (event->destroy) { + event->destroy(event); + event->destroy = NULL; } +err_pmu: + event->pmu = NULL; + module_put(pmu->module); return ret; } -- 2.39.5