runtime: spans corruption #7544
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parent: 19465:08dcdcdb757b tip go test -run=none -bench=.* -cpu=4 compress/flate episodically crashes with: MHeap_FreeLocked - span 0x7f4e8d505980 ptr 0xc2082d2000 state 1 ref 0 sweepgen 118/118 fatal error: MHeap_FreeLocked - invalid free runtime stack: runtime.throw(0x67b7c7) src/pkg/runtime/panic.c:519 +0x69 MHeap_FreeLocked(0x691140, 0x7f4e8d505980) src/pkg/runtime/mheap.c:409 +0x91 runtime.MHeap_Free(0x691140, 0x7f4e8d505980, 0x0) src/pkg/runtime/mheap.c:394 +0xa5 MCentral_ReturnToHeap(0x69d5d0, 0x7f4e8d505980) src/pkg/runtime/mcentral.c:306 +0xe7 runtime.MCentral_UncacheSpan(0x69d5d0, 0x7f4e8d505980) src/pkg/runtime/mcentral.c:127 +0x97 runtime.MCache_ReleaseAll(0x7f4e8d500000) src/pkg/runtime/mcache.c:120 +0x68 flushallmcaches() src/pkg/runtime/mgc0.c:2095 +0x5c markroot(0xc20800e900, 0x4) src/pkg/runtime/mgc0.c:1326 +0x21b runtime.parfordo(0xc20800e900) src/pkg/runtime/parfor.c:103 +0x128 runtime.gchelper() src/pkg/runtime/mgc0.c:2059 +0x2f stopm() src/pkg/runtime/proc.c:960 +0x111 findrunnable() src/pkg/runtime/proc.c:1263 +0x42d schedule() src/pkg/runtime/proc.c:1346 +0xe3 park0(0xc2080025a0) src/pkg/runtime/proc.c:1411 +0xfe runtime.mcall(0x41bd37) src/pkg/runtime/asm_amd64.s:181 +0x4b fatal error: MHeap_AllocLocked - MSpan not free runtime stack: runtime.throw(0x67b700) src/pkg/runtime/panic.c:519 +0x69 MHeap_AllocLocked(0x691140, 0x1, 0x32) src/pkg/runtime/mheap.c:231 +0xbf runtime.MHeap_Alloc(0x691140, 0x1, 0x10000000032) src/pkg/runtime/mheap.c:178 +0x7b MCentral_Grow(0x69d5d0) src/pkg/runtime/mcentral.c:265 +0x89 runtime.MCentral_CacheSpan(0x69d5d0) src/pkg/runtime/mcentral.c:84 +0x14b runtime.MCache_Refill(0x7f8012295000, 0xc200000032) src/pkg/runtime/mcache.c:78 +0x119 runtime.mallocgc(0x2000, 0x0, 0x1e) src/pkg/runtime/malloc.goc:151 +0x2fc runtime.stackalloc(0xc208002c60, 0x2000) src/pkg/runtime/stack.c:128 +0xc5 copystack(0xc208002c60, 0xc, 0x2000) src/pkg/runtime/stack.c:522 +0xb0 runtime.newstack() src/pkg/runtime/stack.c:667 +0x3c8 runtime.morestack() src/pkg/runtime/asm_amd64.s:228 +0x61 fatal error: empty span goroutine 29 [running]: runtime.throw(0x678fa0) src/pkg/runtime/panic.c:519 +0x69 fp=0xc208349c60 runtime.MCentral_CacheSpan(0x69c708) src/pkg/runtime/mcentral.c:94 +0x216 fp=0xc208349c90 runtime.MCache_Refill(0x7f204c91b000, 0xc200000027) src/pkg/runtime/mcache.c:78 +0x119 fp=0xc208349cc0 runtime.mallocgc(0xa00, 0x504500, 0x1) src/pkg/runtime/malloc.goc:151 +0x2fc fp=0xc208349d28 runtime.new(0x504500, 0xc2083e6400) src/pkg/runtime/malloc.goc:815 +0x32 fp=0xc208349d48 compress/flate.NewReader(0x7f204c92b970, 0xc2080223c0, 0x0, 0x0) src/pkg/compress/flate/inflate.go:686 +0x61 fp=0xc208349d78 compress/flate.benchmarkDecode(0xc2083e1a00, 0x1, 0xffffffffffffffff, 0x2710) src/pkg/compress/flate/reader_test.go:67 +0x669 fp=0xc208349ee8 compress/flate.BenchmarkDecodeTwainDefault1e4(0xc2083e1a00) src/pkg/compress/flate/reader_test.go:91 +0x42 fp=0xc208349f10 testing.(*B).runN(0xc2083e1a00, 0x3e8) src/pkg/testing/benchmark.go:124 +0x94 fp=0xc208349f20 testing.(*B).launch(0xc2083e1a00) src/pkg/testing/benchmark.go:214 +0x16c fp=0xc208349fa0 runtime.goexit() src/pkg/runtime/proc.c:1446 fp=0xc208349fa8 created by testing.(*B).run src/pkg/testing/benchmark.go:177 +0x40The text was updated successfully, but these errors were encountered: