6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Hung <alex.hung@xxxxxxx> [ Upstream commit 8b0ddf19cca2a352b2a7e01d99d3ba949a99c84c ] BIOS images may fail to load and null checks are added before they are used. This fixes 6 NULL_RETURNS issues reported by Coverity. Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx> Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx> Signed-off-by: Alex Hung <alex.hung@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/bios/bios_parser.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c index 19cd1bd844df..684b005f564c 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c +++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c @@ -667,6 +667,9 @@ static enum bp_result get_ss_info_v3_1( ss_table_header_include = ((ATOM_ASIC_INTERNAL_SS_INFO_V3 *) bios_get_image(&bp->base, DATA_TABLES(ASIC_InternalSS_Info), struct_size(ss_table_header_include, asSpreadSpectrum, 1))); + if (!ss_table_header_include) + return BP_RESULT_UNSUPPORTED; + table_size = (le16_to_cpu(ss_table_header_include->sHeader.usStructureSize) - sizeof(ATOM_COMMON_TABLE_HEADER)) @@ -1036,6 +1039,8 @@ static enum bp_result get_ss_info_from_internal_ss_info_tbl_V2_1( &bp->base, DATA_TABLES(ASIC_InternalSS_Info), struct_size(header, asSpreadSpectrum, 1))); + if (!header) + return result; memset(info, 0, sizeof(struct spread_spectrum_info)); @@ -1109,6 +1114,8 @@ static enum bp_result get_ss_info_from_ss_info_table( get_atom_data_table_revision(header, &revision); tbl = GET_IMAGE(ATOM_SPREAD_SPECTRUM_INFO, DATA_TABLES(SS_Info)); + if (!tbl) + return result; if (1 != revision.major || 2 > revision.minor) return result; @@ -1636,6 +1643,8 @@ static uint32_t get_ss_entry_number_from_ss_info_tbl( tbl = GET_IMAGE(ATOM_SPREAD_SPECTRUM_INFO, DATA_TABLES(SS_Info)); + if (!tbl) + return number; if (1 != revision.major || 2 > revision.minor) return number; @@ -1718,6 +1727,8 @@ static uint32_t get_ss_entry_number_from_internal_ss_info_tbl_v2_1( &bp->base, DATA_TABLES(ASIC_InternalSS_Info), struct_size(header_include, asSpreadSpectrum, 1))); + if (!header_include) + return 0; size = (le16_to_cpu(header_include->sHeader.usStructureSize) - sizeof(ATOM_COMMON_TABLE_HEADER)) @@ -1756,6 +1767,9 @@ static uint32_t get_ss_entry_number_from_internal_ss_info_tbl_V3_1( header_include = ((ATOM_ASIC_INTERNAL_SS_INFO_V3 *) bios_get_image(&bp->base, DATA_TABLES(ASIC_InternalSS_Info), struct_size(header_include, asSpreadSpectrum, 1))); + if (!header_include) + return number; + size = (le16_to_cpu(header_include->sHeader.usStructureSize) - sizeof(ATOM_COMMON_TABLE_HEADER)) / sizeof(ATOM_ASIC_SS_ASSIGNMENT_V3); -- 2.43.0
