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 3A0A8269801; Tue, 8 Apr 2025 11:50:25 +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=1744113025; cv=none; b=JiB1kkccsa/AzMcLJlgUhC80ImSpkxe53o9WYNjssJjgdlCujj3dGAsGMUQPDqBLffMU5kImNRID0Wmseq9YmKaJwfVqimmD1OZQpDFM1vHZpSPFHBi2uwumHKlOENA/1Pt4Cgm0srDEiWfhIU7yUdB/ACZgNoXNvQAiEeBIRqA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744113025; c=relaxed/simple; bh=wYP4r/sJk1FJfqwgMDUUz9JwmkRfq0veD6CrooBddk4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=F9Sf77yB9K9IDTL1crkDCgbnYHaxz6MxgAY05ZSnBoC+/u8wa6fez8RBbQ65EtRD5MstKCHTv6verMonjfiTv9PFADkifjVrwsTEoheXFL+rQYVrCJhpf/9TNxPKuHj+LzJYEZfMeJLEG4mpHY3UN8Woey5B0GQWo+qua5gi6xs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=joVABiZy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="joVABiZy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BEEAAC4CEE5; Tue, 8 Apr 2025 11:50:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744113025; bh=wYP4r/sJk1FJfqwgMDUUz9JwmkRfq0veD6CrooBddk4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=joVABiZyUJTdSTzdGLa4SX5PsyS61gkV3tiD3NUsAclMYnG8bYwk/ZgER2sViOKZN J7H5OGs9vsKkHU4APIeUVV9jqvsU7Kx+0pfVks5wPnN7ZmECoifc0sswxOvIoT2ykn A7zBFfrDPdsfPMBDVuSmr6ubsA2cK8ir9RaNgjOw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jesse Zhang , Tim Huang , Alex Deucher , Jianqi Ren , He Zhe Subject: [PATCH 5.15 257/279] drm/amd/pm: Fix negative array index read Date: Tue, 8 Apr 2025 12:50:40 +0200 Message-ID: <20250408104833.317699872@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250408104826.319283234@linuxfoundation.org> References: <20250408104826.319283234@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jesse Zhang commit c8c19ebf7c0b202a6a2d37a52ca112432723db5f upstream. Avoid using the negative values for clk_idex as an index into an array pptable->DpmDescriptor. V2: fix clk_index return check (Tim Huang) Signed-off-by: Jesse Zhang Reviewed-by: Tim Huang Signed-off-by: Alex Deucher [Minor conflict resolved due to code context change.] Signed-off-by: Jianqi Ren Signed-off-by: He Zhe Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c @@ -1231,19 +1231,22 @@ static int navi10_get_current_clk_freq_b value); } -static bool navi10_is_support_fine_grained_dpm(struct smu_context *smu, enum smu_clk_type clk_type) +static int navi10_is_support_fine_grained_dpm(struct smu_context *smu, enum smu_clk_type clk_type) { PPTable_t *pptable = smu->smu_table.driver_pptable; DpmDescriptor_t *dpm_desc = NULL; - uint32_t clk_index = 0; + int clk_index = 0; clk_index = smu_cmn_to_asic_specific_index(smu, CMN2ASIC_MAPPING_CLK, clk_type); + if (clk_index < 0) + return clk_index; + dpm_desc = &pptable->DpmDescriptor[clk_index]; /* 0 - Fine grained DPM, 1 - Discrete DPM */ - return dpm_desc->SnapToDiscrete == 0; + return dpm_desc->SnapToDiscrete == 0 ? 1 : 0; } static inline bool navi10_od_feature_is_supported(struct smu_11_0_overdrive_table *od_table, enum SMU_11_0_ODFEATURE_CAP cap) @@ -1299,7 +1302,11 @@ static int navi10_print_clk_levels(struc if (ret) return size; - if (!navi10_is_support_fine_grained_dpm(smu, clk_type)) { + ret = navi10_is_support_fine_grained_dpm(smu, clk_type); + if (ret < 0) + return ret; + + if (!ret) { for (i = 0; i < count; i++) { ret = smu_v11_0_get_dpm_freq_by_index(smu, clk_type, i, &value); if (ret) @@ -1468,7 +1475,11 @@ static int navi10_force_clk_levels(struc case SMU_UCLK: case SMU_FCLK: /* There is only 2 levels for fine grained DPM */ - if (navi10_is_support_fine_grained_dpm(smu, clk_type)) { + ret = navi10_is_support_fine_grained_dpm(smu, clk_type); + if (ret < 0) + return ret; + + if (ret) { soft_max_level = (soft_max_level >= 1 ? 1 : 0); soft_min_level = (soft_min_level >= 1 ? 1 : 0); }