Hello! This is an experimental semi-automated report about issues detected by Coverity from a scan of next-20221104 as part of the linux-next scan project: https://scan.coverity.com/projects/linux-next-weekly-scan You're getting this email because you were associated with the identified lines of code (noted below) that were touched by commits: Fri Dec 8 23:08:59 2017 -0500 3a87177eb141 ("drm/amdkfd: Add topology support for dGPUs") Coverity reported the following: *** CID 1527133: Memory - corruptions (OVERRUN) drivers/gpu/drm/amd/amdkfd/kfd_crat.c:1113 in kfd_parse_subtype_cache() 1107 props->cache_size = cache->cache_size; 1108 props->cacheline_size = cache->cache_line_size; 1109 props->cachelines_per_tag = cache->lines_per_tag; 1110 props->cache_assoc = cache->associativity; 1111 props->cache_latency = cache->cache_latency; 1112 vvv CID 1527133: Memory - corruptions (OVERRUN) vvv Overrunning array "cache->sibling_map" of 32 bytes by passing it to a function which accesses it at byte offset 63 using argument "64UL". [Note: The source code implementation of the function has been overridden by a builtin model.] 1113 memcpy(props->sibling_map, cache->sibling_map, 1114 sizeof(props->sibling_map)); 1115 1116 /* set the sibling_map_size as 32 for CRAT from ACPI */ 1117 props->sibling_map_size = CRAT_SIBLINGMAP_SIZE; 1118 If this is a false positive, please let us know so we can mark it as such, or teach the Coverity rules to be smarter. If not, please make sure fixes get into linux-next. :) For patches fixing this, please include these lines (but double-check the "Fixes" first): Reported-by: coverity-bot <keescook+coverity-bot@xxxxxxxxxxxx> Addresses-Coverity-ID: 1527133 ("Memory - corruptions") Fixes: 3a87177eb141 ("drm/amdkfd: Add topology support for dGPUs") I'm not sure why this suddenly appeared after 5 years, but the read over-run looks legit: struct crat_subtype_cache { ... uint8_t sibling_map[CRAT_SIBLINGMAP_SIZE]; #define CRAT_SIBLINGMAP_SIZE 32 struct kfd_cache_properties { ... uint8_t sibling_map[CACHE_SIBLINGMAP_SIZE]; #define CACHE_SIBLINGMAP_SIZE 64 Thanks for your attention! -- Coverity-bot
