[ This is one of those weird things where the kbuild bot sends the warning to -mm instead of the AMD list. It will likely try send a duplicate warning to the AMD list in a few days. I would have sent this warning in a couple hours from my devel system as well. -dan] tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d3fde8ff50ab265749704bd7fbcf70d35235421f commit: a0ccc717c4ab3ef572f023fdceffb4b6df496a0d [13949/14198] drm/amdgpu/discovery: validate VCN and SDMA instances config: arc-randconfig-m031-20220524 (https://download.01.org/0day-ci/archive/20220528/202205280055.X7671nNw-lkp@xxxxxxxxx/config) compiler: arceb-elf-gcc (GCC) 11.3.0 If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> New smatch warnings: drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c:1133 amdgpu_discovery_reg_base_init() error: testing array offset 'adev->vcn.num_vcn_inst' after use. Old smatch warnings: drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c:1454 amdgpu_discovery_get_vcn_info() error: buffer overflow 'adev->vcn.vcn_codec_disable_mask' 2 <= 3 vim +1133 drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c e24d0e91b336762 Alex Deucher 2022-03-30 1065 static int amdgpu_discovery_reg_base_init(struct amdgpu_device *adev) f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1066 { f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1067 struct binary_header *bhdr; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1068 struct ip_discovery_header *ihdr; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1069 struct die_header *dhdr; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1070 struct ip *ip; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1071 uint16_t die_offset; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1072 uint16_t ip_offset; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1073 uint16_t num_dies; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1074 uint16_t num_ips; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1075 uint8_t num_base_address; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1076 int hw_ip; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1077 int i, j, k; dffa11b4f74b157 Monk Liu 2020-03-04 1078 int r; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1079 dffa11b4f74b157 Monk Liu 2020-03-04 1080 r = amdgpu_discovery_init(adev); dffa11b4f74b157 Monk Liu 2020-03-04 1081 if (r) { dffa11b4f74b157 Monk Liu 2020-03-04 1082 DRM_ERROR("amdgpu_discovery_init failed\n"); dffa11b4f74b157 Monk Liu 2020-03-04 1083 return r; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1084 } f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1085 72de33f8f7ba0f4 Alex Deucher 2020-07-29 1086 bhdr = (struct binary_header *)adev->mman.discovery_bin; 72de33f8f7ba0f4 Alex Deucher 2020-07-29 1087 ihdr = (struct ip_discovery_header *)(adev->mman.discovery_bin + f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1088 le16_to_cpu(bhdr->table_list[IP_DISCOVERY].offset)); f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1089 num_dies = le16_to_cpu(ihdr->num_dies); f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1090 437298b833996de Xiaojie Yuan 2019-03-27 1091 DRM_DEBUG("number of dies: %d\n", num_dies); f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1092 f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1093 for (i = 0; i < num_dies; i++) { f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1094 die_offset = le16_to_cpu(ihdr->die_info[i].die_offset); 72de33f8f7ba0f4 Alex Deucher 2020-07-29 1095 dhdr = (struct die_header *)(adev->mman.discovery_bin + die_offset); f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1096 num_ips = le16_to_cpu(dhdr->num_ips); f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1097 ip_offset = die_offset + sizeof(*dhdr); f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1098 437298b833996de Xiaojie Yuan 2019-03-27 1099 if (le16_to_cpu(dhdr->die_id) != i) { 437298b833996de Xiaojie Yuan 2019-03-27 1100 DRM_ERROR("invalid die id %d, expected %d\n", 437298b833996de Xiaojie Yuan 2019-03-27 1101 le16_to_cpu(dhdr->die_id), i); 437298b833996de Xiaojie Yuan 2019-03-27 1102 return -EINVAL; 437298b833996de Xiaojie Yuan 2019-03-27 1103 } 437298b833996de Xiaojie Yuan 2019-03-27 1104 437298b833996de Xiaojie Yuan 2019-03-27 1105 DRM_DEBUG("number of hardware IPs on die%d: %d\n", 437298b833996de Xiaojie Yuan 2019-03-27 1106 le16_to_cpu(dhdr->die_id), num_ips); 437298b833996de Xiaojie Yuan 2019-03-27 1107 f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1108 for (j = 0; j < num_ips; j++) { 72de33f8f7ba0f4 Alex Deucher 2020-07-29 1109 ip = (struct ip *)(adev->mman.discovery_bin + ip_offset); 5039f5298880f7a Ernst Sjöstrand 2021-09-26 1110 5039f5298880f7a Ernst Sjöstrand 2021-09-26 1111 if (amdgpu_discovery_validate_ip(ip)) 5039f5298880f7a Ernst Sjöstrand 2021-09-26 1112 goto next_ip; 5039f5298880f7a Ernst Sjöstrand 2021-09-26 1113 f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1114 num_base_address = ip->num_base_address; f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1115 437298b833996de Xiaojie Yuan 2019-03-27 1116 DRM_DEBUG("%s(%d) #%d v%d.%d.%d:\n", 437298b833996de Xiaojie Yuan 2019-03-27 1117 hw_id_names[le16_to_cpu(ip->hw_id)], 437298b833996de Xiaojie Yuan 2019-03-27 1118 le16_to_cpu(ip->hw_id), 437298b833996de Xiaojie Yuan 2019-03-27 1119 ip->number_instance, f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1120 ip->major, ip->minor, f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1121 ip->revision); f39f5bb1c9d68d5 Xiaojie Yuan 2019-06-20 1122 baf3f8f37406257 Alex Deucher 2021-11-30 1123 if (le16_to_cpu(ip->hw_id) == VCN_HWID) { c40bdfb2ffa4cf1 Leslie Shi 2021-12-08 1124 /* Bit [5:0]: original revision value baf3f8f37406257 Alex Deucher 2021-11-30 1125 * Bit [7:6]: en/decode capability: baf3f8f37406257 Alex Deucher 2021-11-30 1126 * 0b00 : VCN function normally baf3f8f37406257 Alex Deucher 2021-11-30 1127 * 0b10 : encode is disabled baf3f8f37406257 Alex Deucher 2021-11-30 1128 * 0b01 : decode is disabled baf3f8f37406257 Alex Deucher 2021-11-30 1129 */ c40bdfb2ffa4cf1 Leslie Shi 2021-12-08 1130 adev->vcn.vcn_config[adev->vcn.num_vcn_inst] = ^^^^^^^^^^^^^^^^^^^^^^ If adev->vcn.num_vcn_inst == AMDGPU_MAX_VCN_INSTANCES then this will corrupt memory. c40bdfb2ffa4cf1 Leslie Shi 2021-12-08 1131 ip->revision & 0xc0; baf3f8f37406257 Alex Deucher 2021-11-30 1132 ip->revision &= ~0xc0; a0ccc717c4ab3ef Alex Deucher 2022-05-16 @1133 if (adev->vcn.num_vcn_inst < AMDGPU_MAX_VCN_INSTANCES) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Checked too late. 7cbe08a930a132d Alex Deucher 2021-08-09 1134 adev->vcn.num_vcn_inst++; a0ccc717c4ab3ef Alex Deucher 2022-05-16 1135 else a0ccc717c4ab3ef Alex Deucher 2022-05-16 1136 dev_err(adev->dev, "Too many VCN instances: %d vs %d\n", a0ccc717c4ab3ef Alex Deucher 2022-05-16 1137 adev->vcn.num_vcn_inst + 1, a0ccc717c4ab3ef Alex Deucher 2022-05-16 1138 AMDGPU_MAX_VCN_INSTANCES); baf3f8f37406257 Alex Deucher 2021-11-30 1139 } 5c3720be7d46581 Alex Deucher 2021-08-09 1140 if (le16_to_cpu(ip->hw_id) == SDMA0_HWID || 5c3720be7d46581 Alex Deucher 2021-08-09 1141 le16_to_cpu(ip->hw_id) == SDMA1_HWID || 5c3720be7d46581 Alex Deucher 2021-08-09 1142 le16_to_cpu(ip->hw_id) == SDMA2_HWID || a0ccc717c4ab3ef Alex Deucher 2022-05-16 1143 le16_to_cpu(ip->hw_id) == SDMA3_HWID) { a0ccc717c4ab3ef Alex Deucher 2022-05-16 1144 if (adev->sdma.num_instances < AMDGPU_MAX_SDMA_INSTANCES) 5c3720be7d46581 Alex Deucher 2021-08-09 1145 adev->sdma.num_instances++; a0ccc717c4ab3ef Alex Deucher 2022-05-16 1146 else a0ccc717c4ab3ef Alex Deucher 2022-05-16 1147 dev_err(adev->dev, "Too many SDMA instances: %d vs %d\n", a0ccc717c4ab3ef Alex Deucher 2022-05-16 1148 adev->sdma.num_instances + 1, a0ccc717c4ab3ef Alex Deucher 2022-05-16 1149 AMDGPU_MAX_SDMA_INSTANCES); a0ccc717c4ab3ef Alex Deucher 2022-05-16 1150 } 7cbe08a930a132d Alex Deucher 2021-08-09 1151 -- 0-DAY CI Kernel Test Service https://01.org/lkp
