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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id k9sm4320391pfu.109.2021.08.17.23.14.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Aug 2021 23:14:15 -0700 (PDT) From: Kees Cook To: linux-kernel@vger.kernel.org Cc: Kees Cook , =?utf-8?q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , David Airlie , Daniel Vetter , Hawking Zhang , Feifei Xu , Lijo Lazar , Likun Gao , Jiawei Gu , Evan Quan , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, Alex Deucher , "Gustavo A. R. Silva" , Greg Kroah-Hartman , Andrew Morton , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com, Rasmus Villemoes , linux-hardening@vger.kernel.org Subject: [PATCH v2 18/63] drm/amd/pm: Use struct_group() for memcpy() region Date: Tue, 17 Aug 2021 23:04:48 -0700 Message-Id: <20210818060533.3569517-19-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210818060533.3569517-1-keescook@chromium.org> References: <20210818060533.3569517-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=9874; h=from:subject; bh=xkq/GgVQos4phY69YvlHwazwtJ7+oBoAW/iYv7WVAic=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhHKMhiWVzzmhBur+1cBk2O2ZXVSjeLlgxz10CkbR5 AKO/11yJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYRyjIQAKCRCJcvTf3G3AJht6EA CaYxNgC78NjMU3NXMgzorx6fRtH4BJwYIGJ74DB/m7swwaAHceyK1O/6lCQ7H812Aiiq4XK3QDmoUk qASs/4198qLTAEHhq7Q18FiMX2P3A7Q0631t7ABRcNNf+8sZXncmdOZPGYXpPAODBOCabM/f3/oDCx juRFOQ2unI6EojppuO7CJSyN6BitOl0EfAAVwzH5qdN0dbqjvmJWEk6DyGUh+uyHqAcClSWCqlrEC2 2OsaBqNYzf5j6vWeBx02EpyOWFqkO/XyPXBqw7kL7GIS2sxESQTqmhPrfGjlNI8aLc5oqP4Nz/mHlj izA+lyAMf9/CaxogHr7ad/WNivgAySk9xHsccW792p6SsKVbNUtuWM4hk2GkKJimH31lP9pcLQL2Ch j7xVH/dOlAV9Ftvi7+KvJI+v+DmQ/gRxe5YIRztukLnhmjPWcMqKsuKK44UwR65YeFh33G6UZWzhZj SwUBV/6zpAPgCZDoeJ5hTeN2HohgNJ0fijbEnaK+ifaUEslAh2R7Yxz9WjnXacxem2c2/Z6wGyyAdq 8GbFcwR+u8iKZLAOMc13DJT6zOgy8+ZXHxMay8F6GzxmI1F43Z0WF2KzMZDLs5tgRr/UrucI9TgIhX cizSF2eNXvheQca86HlnqqfZiLL7gsttRC6U5oD07PukPv3YeEniSDJPST0g== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org In preparation for FORTIFY_SOURCE performing compile-time and run-time field bounds checking for memcpy(), memmove(), and memset(), avoid intentionally writing across neighboring fields. Use struct_group() in structs: struct atom_smc_dpm_info_v4_5 struct atom_smc_dpm_info_v4_6 struct atom_smc_dpm_info_v4_7 struct atom_smc_dpm_info_v4_10 PPTable_t so the grouped members can be referenced together. This will allow memcpy() and sizeof() to more easily reason about sizes, improve readability, and avoid future warnings about writing beyond the end of the first member. "pahole" shows no size nor member offset changes to any structs. "objdump -d" shows no object code changes. Cc: "Christian König" Cc: "Pan, Xinhui" Cc: David Airlie Cc: Daniel Vetter Cc: Hawking Zhang Cc: Feifei Xu Cc: Lijo Lazar Cc: Likun Gao Cc: Jiawei Gu Cc: Evan Quan Cc: amd-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: Kees Cook Acked-by: Alex Deucher Link: https://lore.kernel.org/lkml/CADnq5_Npb8uYvd+R4UHgf-w8-cQj3JoODjviJR_Y9w9wqJ71mQ@mail.gmail.com --- drivers/gpu/drm/amd/include/atomfirmware.h | 9 ++++++++- .../gpu/drm/amd/pm/inc/smu11_driver_if_arcturus.h | 3 ++- drivers/gpu/drm/amd/pm/inc/smu11_driver_if_navi10.h | 3 ++- .../gpu/drm/amd/pm/inc/smu13_driver_if_aldebaran.h | 3 ++- drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c | 6 +++--- drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | 12 ++++++++---- drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c | 6 +++--- 7 files changed, 28 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/amd/include/atomfirmware.h b/drivers/gpu/drm/amd/include/atomfirmware.h index 44955458fe38..7bf3edf15410 100644 --- a/drivers/gpu/drm/amd/include/atomfirmware.h +++ b/drivers/gpu/drm/amd/include/atomfirmware.h @@ -2081,6 +2081,7 @@ struct atom_smc_dpm_info_v4_5 { struct atom_common_table_header table_header; // SECTION: BOARD PARAMETERS + struct_group(dpm_info, // I2C Control struct smudpm_i2c_controller_config_v2 I2cControllers[8]; @@ -2159,7 +2160,7 @@ struct atom_smc_dpm_info_v4_5 uint32_t MvddRatio; // This is used for MVDD Vid workaround. It has 16 fractional bits (Q16.16) uint32_t BoardReserved[9]; - + ); }; struct atom_smc_dpm_info_v4_6 @@ -2168,6 +2169,7 @@ struct atom_smc_dpm_info_v4_6 // section: board parameters uint32_t i2c_padding[3]; // old i2c control are moved to new area + struct_group(dpm_info, uint16_t maxvoltagestepgfx; // in mv(q2) max voltage step that smu will request. multiple steps are taken if voltage change exceeds this value. uint16_t maxvoltagestepsoc; // in mv(q2) max voltage step that smu will request. multiple steps are taken if voltage change exceeds this value. @@ -2246,12 +2248,14 @@ struct atom_smc_dpm_info_v4_6 // reserved uint32_t boardreserved[10]; + ); }; struct atom_smc_dpm_info_v4_7 { struct atom_common_table_header table_header; // SECTION: BOARD PARAMETERS + struct_group(dpm_info, // I2C Control struct smudpm_i2c_controller_config_v2 I2cControllers[8]; @@ -2348,6 +2352,7 @@ struct atom_smc_dpm_info_v4_7 uint8_t Padding8_Psi2; uint32_t BoardReserved[5]; + ); }; struct smudpm_i2c_controller_config_v3 @@ -2478,6 +2483,7 @@ struct atom_smc_dpm_info_v4_10 struct atom_common_table_header table_header; // SECTION: BOARD PARAMETERS + struct_group(dpm_info, // Telemetry Settings uint16_t GfxMaxCurrent; // in Amps uint8_t GfxOffset; // in Amps @@ -2524,6 +2530,7 @@ struct atom_smc_dpm_info_v4_10 uint16_t spare5; uint32_t reserved[16]; + ); }; /* diff --git a/drivers/gpu/drm/amd/pm/inc/smu11_driver_if_arcturus.h b/drivers/gpu/drm/amd/pm/inc/smu11_driver_if_arcturus.h index 43d43d6addc0..8093a98800c3 100644 --- a/drivers/gpu/drm/amd/pm/inc/smu11_driver_if_arcturus.h +++ b/drivers/gpu/drm/amd/pm/inc/smu11_driver_if_arcturus.h @@ -643,6 +643,7 @@ typedef struct { // SECTION: BOARD PARAMETERS // SVI2 Board Parameters + struct_group(v4_6, uint16_t MaxVoltageStepGfx; // In mV(Q2) Max voltage step that SMU will request. Multiple steps are taken if voltage change exceeds this value. uint16_t MaxVoltageStepSoc; // In mV(Q2) Max voltage step that SMU will request. Multiple steps are taken if voltage change exceeds this value. @@ -728,10 +729,10 @@ typedef struct { uint32_t BoardVoltageCoeffB; // decode by /1000 uint32_t BoardReserved[7]; + ); // Padding for MMHUB - do not modify this uint32_t MmHubPadding[8]; // SMU internal use - } PPTable_t; typedef struct { diff --git a/drivers/gpu/drm/amd/pm/inc/smu11_driver_if_navi10.h b/drivers/gpu/drm/amd/pm/inc/smu11_driver_if_navi10.h index 04752ade1016..0b4e6e907e95 100644 --- a/drivers/gpu/drm/amd/pm/inc/smu11_driver_if_navi10.h +++ b/drivers/gpu/drm/amd/pm/inc/smu11_driver_if_navi10.h @@ -725,6 +725,7 @@ typedef struct { uint32_t Reserved[8]; // SECTION: BOARD PARAMETERS + struct_group(v4, // I2C Control I2cControllerConfig_t I2cControllers[NUM_I2C_CONTROLLERS]; @@ -809,10 +810,10 @@ typedef struct { uint8_t Padding8_Loadline; uint32_t BoardReserved[8]; + ); // Padding for MMHUB - do not modify this uint32_t MmHubPadding[8]; // SMU internal use - } PPTable_t; typedef struct { diff --git a/drivers/gpu/drm/amd/pm/inc/smu13_driver_if_aldebaran.h b/drivers/gpu/drm/amd/pm/inc/smu13_driver_if_aldebaran.h index a017983ff1fa..5056d3728da8 100644 --- a/drivers/gpu/drm/amd/pm/inc/smu13_driver_if_aldebaran.h +++ b/drivers/gpu/drm/amd/pm/inc/smu13_driver_if_aldebaran.h @@ -390,6 +390,7 @@ typedef struct { uint32_t spare3[14]; // SECTION: BOARD PARAMETERS + struct_group(v4_10, // Telemetry Settings uint16_t GfxMaxCurrent; // in Amps int8_t GfxOffset; // in Amps @@ -444,7 +445,7 @@ typedef struct { //reserved uint32_t reserved[14]; - + ); } PPTable_t; typedef struct { diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c index 8ab58781ae13..341adf209240 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c @@ -463,11 +463,11 @@ static int arcturus_append_powerplay_table(struct smu_context *smu) smc_dpm_table->table_header.format_revision, smc_dpm_table->table_header.content_revision); + BUILD_BUG_ON(sizeof(smc_pptable->v4_6) != sizeof(smc_dpm_table->dpm_info)); if ((smc_dpm_table->table_header.format_revision == 4) && (smc_dpm_table->table_header.content_revision == 6)) - memcpy(&smc_pptable->MaxVoltageStepGfx, - &smc_dpm_table->maxvoltagestepgfx, - sizeof(*smc_dpm_table) - offsetof(struct atom_smc_dpm_info_v4_6, maxvoltagestepgfx)); + memcpy(&smc_pptable->v4_6, &smc_dpm_table->dpm_info, + sizeof(smc_dpm_table->dpm_info)); return 0; } diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c index 2e5d3669652b..e8b6e25a7815 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c @@ -431,16 +431,20 @@ static int navi10_append_powerplay_table(struct smu_context *smu) switch (smc_dpm_table->table_header.content_revision) { case 5: /* nv10 and nv14 */ - memcpy(smc_pptable->I2cControllers, smc_dpm_table->I2cControllers, - sizeof(*smc_dpm_table) - sizeof(smc_dpm_table->table_header)); + BUILD_BUG_ON(sizeof(smc_pptable->v4) != + sizeof(smc_dpm_table->dpm_info)); + memcpy(&smc_pptable->v4, &smc_dpm_table->dpm_info, + sizeof(smc_dpm_table->dpm_info)); break; case 7: /* nv12 */ ret = amdgpu_atombios_get_data_table(adev, index, NULL, NULL, NULL, (uint8_t **)&smc_dpm_table_v4_7); if (ret) return ret; - memcpy(smc_pptable->I2cControllers, smc_dpm_table_v4_7->I2cControllers, - sizeof(*smc_dpm_table_v4_7) - sizeof(smc_dpm_table_v4_7->table_header)); + BUILD_BUG_ON(sizeof(smc_pptable->v4) != + sizeof(smc_dpm_table_v4_7->dpm_info)); + memcpy(&smc_pptable->v4, &smc_dpm_table_v4_7->dpm_info, + sizeof(smc_dpm_table_v4_7->dpm_info)); break; default: dev_err(smu->adev->dev, "smc_dpm_info with unsupported content revision %d!\n", diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c index c8eefacfdd37..492ba37bc514 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c @@ -407,11 +407,11 @@ static int aldebaran_append_powerplay_table(struct smu_context *smu) smc_dpm_table->table_header.format_revision, smc_dpm_table->table_header.content_revision); + BUILD_BUG_ON(sizeof(smc_pptable->v4_10) != sizeof(smc_dpm_table->dpm_info)); if ((smc_dpm_table->table_header.format_revision == 4) && (smc_dpm_table->table_header.content_revision == 10)) - memcpy(&smc_pptable->GfxMaxCurrent, - &smc_dpm_table->GfxMaxCurrent, - sizeof(*smc_dpm_table) - offsetof(struct atom_smc_dpm_info_v4_10, GfxMaxCurrent)); + memcpy(&smc_pptable->v4_10, &smc_dpm_table->dpm_info, + sizeof(smc_dpm_table->dpm_info)); return 0; }