From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793214049; b=bIFcrOss6+Jv2tLwKZz5YLoCiKENus2uwLftGQja37SgXv7HllEXbwJ7tFSzcBt8lZVQ UOfexhks83D0zpZfadYm7QjfklxM44h6PaNWPh1CkpakkhJ0rw+nw3R/Yk+cV4dS8MSjI q1lqZQ0d7AHZB9z3IXKJg0B50XqSz/ZYA8z0fInJymZg+MkNlbo+8xWshf/mAZxMJ/x1f QC/fPIeHNrQgv7RzBT3fmkSiH5ZzfdOcfDHnX5uRCw0ZqQ4UiPE1jbdjFCx0g44dYwxoO RV35Am+ptYK+sXCwsD32CxW56ZqbaR5qNqG4LncEc00NRvgYPEdYrhcxwiWeiHkEZ1Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793214049; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=/MCeCl99YotZkUaZWWuuK7dIuMTuJVMXkqU3GmGlljg=; b=G2Gp39kAVVIQn2Bva84Uy46QCD0pnFCjNPP5ITOTI30RY3lTu2giGkKtdaUdj7OdvH64 WB9k0IQ59nkrDj4fwqb1AxQs/C01PwWCwa6JhL96sSGVc43B5EOX3odNLjpEwrA1JzHvU K7NrvbelcBfwOMJU6ME++gI3fnvkS9dLNbfDGgFHM9PWuB5BudfbBfrWOs1ADg9LmzhNZ 4fgG14zCT2f8EhIiU4UG4O0tqMgKFYb8rqF/NlXW9rNnFX0jmMU3NnKoeg72tgyEBuCDS 1wC6WK8rYIVC0Onjzx3an3Wg9dSzlBQDweV8g1yI/u1SZD+b9QGZwD1GHEO5b6gtyyQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=ekuvdXCi; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D0981606A31D; Wed, 28 Oct 2026 19:00:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=ekuvdXCi Received: by smtp.kernel.org (Postfix) with ESMTPSA id E48681F01825; Wed, 28 Oct 2026 19:00:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793214048; bh=/MCeCl99YotZkUaZWWuuK7dIuMTuJVMXkqU3GmGlljg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ekuvdXCiAG2uwnt+hi2cNvcNEeiDb9w1ni2ODsNQMYHiYh1eFF6AfQY8cETPKTvIx M5o9qbAx+nzbIMhwyLjaWKBOWe7nMm9MGOhgkJOBK1XmQ7JYCwxkKDJ/yLJMkd4DdJ 5P2FC5bz6VvaqV3mxDZhA+MRE6pQkbcukK1oGu3I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Anastasia Belova , Perry Yuan , Viresh Kumar , Sasha Levin Subject: [PATCH 6.1 0677/1887] cpufreq: amd-pstate: add check for cpufreq_cpu_gets return value Date: Wed, 28 Oct 2026 17:46:13 +0100 Message-ID: <20261028170514.817634001@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170459.200466217@linuxfoundation.org> References: <20261028170459.200466217@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Anastasia Belova [ Upstream commit 5493f9714e4cdaf0ee7cec15899a231400cb1a9f ] cpufreq_cpu_get may return NULL. To avoid NULL-dereference check it and return in case of error. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Anastasia Belova Reviewed-by: Perry Yuan Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin --- drivers/cpufreq/amd-pstate.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 90dcf26f09731..106aef210003d 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -309,9 +309,14 @@ static void amd_pstate_adjust_perf(unsigned int cpu, unsigned long max_perf, min_perf, des_perf, cap_perf, lowest_nonlinear_perf, max_freq; struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); - struct amd_cpudata *cpudata = policy->driver_data; + struct amd_cpudata *cpudata; unsigned int target_freq; + if (!policy) + return; + + cpudata = policy->driver_data; + cap_perf = READ_ONCE(cpudata->highest_perf); lowest_nonlinear_perf = READ_ONCE(cpudata->lowest_nonlinear_perf); max_freq = READ_ONCE(cpudata->max_freq); -- 2.53.0