Hi Nick, First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 844056fd74ebdd826bd23a7d989597e15f478acb commit: 5c1aab1dd5445ed8bdcdbb575abc1b0d7ee5b2e7 btrfs: Add zstd support date: 3 months ago config: x86_64-randconfig-h0-11260236 (attached as .config) compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025 reproduce: git checkout 5c1aab1dd5445ed8bdcdbb575abc1b0d7ee5b2e7 # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): Cyclomatic Complexity 1 lib/zstd/error_private.h:ERR_isError Cyclomatic Complexity 1 include/uapi/linux/byteorder/little_endian.h:__le64_to_cpup Cyclomatic Complexity 1 include/uapi/linux/byteorder/little_endian.h:__le32_to_cpup Cyclomatic Complexity 1 include/uapi/linux/byteorder/little_endian.h:__le16_to_cpup Cyclomatic Complexity 1 include/linux/unaligned/access_ok.h:get_unaligned_le16 Cyclomatic Complexity 1 include/linux/unaligned/access_ok.h:get_unaligned_le32 Cyclomatic Complexity 1 include/linux/unaligned/access_ok.h:get_unaligned_le64 Cyclomatic Complexity 1 lib/zstd/mem.h:ZSTD_32bits Cyclomatic Complexity 1 lib/zstd/mem.h:ZSTD_readLE16 Cyclomatic Complexity 1 lib/zstd/mem.h:ZSTD_readLE24 Cyclomatic Complexity 1 lib/zstd/mem.h:ZSTD_readLE32 Cyclomatic Complexity 1 lib/zstd/mem.h:ZSTD_readLE64 Cyclomatic Complexity 2 lib/zstd/mem.h:ZSTD_readLEST Cyclomatic Complexity 1 lib/zstd/bitstream.h:BIT_lookBits Cyclomatic Complexity 1 lib/zstd/bitstream.h:BIT_lookBitsFast Cyclomatic Complexity 1 lib/zstd/bitstream.h:BIT_skipBits Cyclomatic Complexity 1 lib/zstd/bitstream.h:BIT_readBits Cyclomatic Complexity 1 lib/zstd/bitstream.h:BIT_readBitsFast Cyclomatic Complexity 1 lib/zstd/fse.h:FSE_peekSymbol Cyclomatic Complexity 1 lib/zstd/fse.h:FSE_updateState Cyclomatic Complexity 1 lib/zstd/zstd_internal.h:ZSTD_copy8 Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_copy4 Cyclomatic Complexity 31 lib/zstd/decompress.c:ZSTD_execSequence Cyclomatic Complexity 32 lib/zstd/decompress.c:ZSTD_decodeSequenceLong_generic Cyclomatic Complexity 31 lib/zstd/decompress.c:ZSTD_execSequenceLong Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_refDictContent Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_DDictDictContent Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_DDictDictSize Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_limitCopy Cyclomatic Complexity 4 lib/zstd/decompress.c:ZSTD_frameHeaderSize Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_checkContinuity Cyclomatic Complexity 11 lib/zstd/bitstream.h:BIT_reloadDStream Cyclomatic Complexity 1 lib/zstd/fse.h:FSE_initDState Cyclomatic Complexity 4 lib/zstd/zstd_internal.h:ZSTD_wildcopy Cyclomatic Complexity 20 lib/zstd/decompress.c:ZSTD_decodeSequence Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_copyRawBlock Cyclomatic Complexity 5 lib/zstd/decompress.c:ZSTD_setRleBlock Cyclomatic Complexity 15 lib/zstd/decompress.c:ZSTD_buildSeqTable Cyclomatic Complexity 1 lib/zstd/bitstream.h:BIT_highbit32 Cyclomatic Complexity 17 lib/zstd/bitstream.h:BIT_initDStream Cyclomatic Complexity 1 lib/zstd/zstd_internal.h:ZSTD_highbit32 Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_decodeSequenceLong Cyclomatic Complexity 17 lib/zstd/decompress.c:ZSTD_execSequenceLast7 Cyclomatic Complexity 27 lib/zstd/decompress.c:ZSTD_loadEntropy Cyclomatic Complexity 6 lib/zstd/decompress.c:ZSTD_decompress_insertDictionary Cyclomatic Complexity 6 lib/zstd/decompress.c:ZSTD_loadEntropy_inDDict Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_DCtxWorkspaceBound Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_decompressBegin Cyclomatic Complexity 5 lib/zstd/decompress.c:ZSTD_refDDict Cyclomatic Complexity 11 lib/zstd/decompress.c:ZSTD_createDCtx_advanced Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_initDCtx Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_freeDCtx Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_copyDCtx Cyclomatic Complexity 7 lib/zstd/decompress.c:ZSTD_isFrame Cyclomatic Complexity 27 lib/zstd/decompress.c:ZSTD_getFrameParams Cyclomatic Complexity 14 lib/zstd/decompress.c:ZSTD_decodeFrameHeader Cyclomatic Complexity 6 lib/zstd/decompress.c:ZSTD_getFrameContentSize Cyclomatic Complexity 7 lib/zstd/decompress.c:ZSTD_getcBlockSize Cyclomatic Complexity 35 lib/zstd/decompress.c:ZSTD_decodeLiteralsBlock Cyclomatic Complexity 18 lib/zstd/decompress.c:ZSTD_decodeSeqHeaders Cyclomatic Complexity 20 lib/zstd/decompress.c:ZSTD_decompressSequencesLong Cyclomatic Complexity 14 lib/zstd/decompress.c:ZSTD_decompressSequences Cyclomatic Complexity 6 lib/zstd/decompress.c:ZSTD_decompressBlock_internal Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_decompressBlock Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_insertBlock Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_generateNxBytes Cyclomatic Complexity 24 lib/zstd/decompress.c:ZSTD_decompressFrame Cyclomatic Complexity 17 lib/zstd/decompress.c:ZSTD_findFrameCompressedSize Cyclomatic Complexity 15 lib/zstd/decompress.c:ZSTD_findDecompressedSize Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_nextSrcSizeToDecompress Cyclomatic Complexity 6 lib/zstd/decompress.c:ZSTD_nextInputType Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_isSkipFrame Cyclomatic Complexity 39 lib/zstd/decompress.c:ZSTD_decompressContinue Cyclomatic Complexity 5 lib/zstd/decompress.c:ZSTD_decompressBegin_usingDict Cyclomatic Complexity 20 lib/zstd/decompress.c:ZSTD_decompressMultiFrame Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_decompress_usingDict Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_decompressDCtx Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_DDictWorkspaceBound Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_freeDDict Cyclomatic Complexity 22 lib/zstd/decompress.c:ZSTD_createDDict_advanced Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_initDDict Cyclomatic Complexity 4 lib/zstd/decompress.c:ZSTD_getDictID_fromDict Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_getDictID_fromDDict Cyclomatic Complexity 2 lib/zstd/decompress.c:ZSTD_getDictID_fromFrame Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_decompress_usingDDict Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_DStreamWorkspaceBound Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_freeDStream Cyclomatic Complexity 13 lib/zstd/decompress.c:ZSTD_createDStream_advanced Cyclomatic Complexity 11 lib/zstd/decompress.c:ZSTD_initDStream Cyclomatic Complexity 3 lib/zstd/decompress.c:ZSTD_initDStream_usingDDict Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_DStreamInSize Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_DStreamOutSize Cyclomatic Complexity 1 lib/zstd/decompress.c:ZSTD_resetDStream Cyclomatic Complexity 68 lib/zstd/decompress.c:ZSTD_decompressStream lib/zstd/decompress.c: In function 'ZSTD_decompressStream': >> lib/zstd/decompress.c:416:2: warning: argument 1 null where non-null >> expected [-Wnonnull] memcpy(dst, src, srcSize); ^~~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/string.h:4:0, from include/linux/string.h:18, from lib/zstd/mem.h:24, from lib/zstd/bitstream.h:54, from lib/zstd/fse.h:228, from lib/zstd/decompress.c:32: arch/x86/include/asm/string_64.h:31:14: note: in a call to function 'memcpy' declared here extern void *memcpy(void *to, const void *from, size_t len); ^~~~~~ lib/zstd/decompress.c:426:2: warning: argument 1 null where non-null expected [-Wnonnull] memset(dst, *(const BYTE *)src, regenSize); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/string.h:4:0, from include/linux/string.h:18, from lib/zstd/mem.h:24, from lib/zstd/bitstream.h:54, from lib/zstd/fse.h:228, from lib/zstd/decompress.c:32: arch/x86/include/asm/string_64.h:58:7: note: in a call to function 'memset' declared here void *memset(void *s, int c, size_t n); ^~~~~~ >> lib/zstd/decompress.c:416:2: warning: argument 1 null where non-null >> expected [-Wnonnull] memcpy(dst, src, srcSize); ^~~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/string.h:4:0, from include/linux/string.h:18, from lib/zstd/mem.h:24, from lib/zstd/bitstream.h:54, from lib/zstd/fse.h:228, from lib/zstd/decompress.c:32: arch/x86/include/asm/string_64.h:31:14: note: in a call to function 'memcpy' declared here extern void *memcpy(void *to, const void *from, size_t len); ^~~~~~ lib/zstd/decompress.c:426:2: warning: argument 1 null where non-null expected [-Wnonnull] memset(dst, *(const BYTE *)src, regenSize); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/string.h:4:0, from include/linux/string.h:18, from lib/zstd/mem.h:24, from lib/zstd/bitstream.h:54, from lib/zstd/fse.h:228, from lib/zstd/decompress.c:32: arch/x86/include/asm/string_64.h:58:7: note: in a call to function 'memset' declared here void *memset(void *s, int c, size_t n); ^~~~~~ vim +416 lib/zstd/decompress.c 73f3d1b4 Nick Terrell 2017-08-09 411 73f3d1b4 Nick Terrell 2017-08-09 412 static size_t ZSTD_copyRawBlock(void *dst, size_t dstCapacity, const void *src, size_t srcSize) 73f3d1b4 Nick Terrell 2017-08-09 413 { 73f3d1b4 Nick Terrell 2017-08-09 414 if (srcSize > dstCapacity) 73f3d1b4 Nick Terrell 2017-08-09 415 return ERROR(dstSize_tooSmall); 73f3d1b4 Nick Terrell 2017-08-09 @416 memcpy(dst, src, srcSize); 73f3d1b4 Nick Terrell 2017-08-09 417 return srcSize; 73f3d1b4 Nick Terrell 2017-08-09 418 } 73f3d1b4 Nick Terrell 2017-08-09 419 :::::: The code at line 416 was first introduced by commit :::::: 73f3d1b48f5069d46ba48aa28c2898dc93185560 lib: Add zstd modules :::::: TO: Nick Terrell <terre...@fb.com> :::::: CC: Chris Mason <c...@fb.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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