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SetVal: Fix stack overflow in umarking logic #35

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merged 1 commit into from Jan 10, 2020
Merged

SetVal: Fix stack overflow in umarking logic #35

merged 1 commit into from Jan 10, 2020

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radeksimko
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@radeksimko radeksimko commented Jan 9, 2020 •
edited

This fixes the following stack overflow as demonstrated in the attached test.

runtime: goroutine stack exceeds 1000000000-byte limit
fatal error: stack overflow

runtime stack:
runtime.throw(0x12c7621, 0xe)
	/Users/radeksimko/.goenv/versions/1.12.9/src/runtime/panic.go:617 +0x72
runtime.newstack()
	/Users/radeksimko/.goenv/versions/1.12.9/src/runtime/stack.go:1041 +0x6f0
runtime.morestack()
	/Users/radeksimko/.goenv/versions/1.12.9/src/runtime/asm_amd64.s:429 +0x8f

...

@apparentlymart apparentlymart mentioned this pull request Jan 9, 2020
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radeksimko
radeksimko commented Jan 10, 2020
View reviewed changes
cty/walk_test.go
gotVal, err := Transform(val, func(path Path, val Value) (Value, error) {
if val.Type().IsPrimitiveType() {
gotVal, err := Transform(val, func(path Path, v Value) (Value, error) {
if v.Type().IsPrimitiveType() {
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This code isn't really affected, but I decided to change it anyway to prevent the ambiguity and similar bugs in the future, in case anyone copies from here.

@radeksimko radeksimko changed the title SetVal with nested SetVal causes stack overflow SetVal: Fix stack overflow in umarking logic Jan 10, 2020
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codecov bot commented Jan 10, 2020 •
edited

Codecov Report

Merging #35 into master will not change coverage.
The diff coverage is 100%.

Impacted file tree graph

@@           Coverage Diff           @@
##           master      #35   +/-   ##
=======================================
  Coverage   76.11%   76.11%           
=======================================
  Files          77       77           
  Lines        6172     6172           
=======================================
  Hits         4698     4698           
  Misses       1058     1058           
  Partials      416      416
Impacted Files Coverage Δ
cty/marks.go 79.57% <100%> (ø) ⬆️

Continue to review full report at Codecov.

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@apparentlymart
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Looks great! Thanks for tracking this down and fixing it. 🎉

@apparentlymart apparentlymart merged commit e362ebe into zclconf:master Jan 10, 2020
@radeksimko radeksimko deleted the b-setval-fix branch January 10, 2020 17:29
@radeksimko radeksimko restored the b-setval-fix branch January 10, 2020 17:29
@radeksimko radeksimko deleted the b-setval-fix branch January 10, 2020 17:29
@meshuga meshuga mentioned this pull request Feb 8, 2020
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@radeksimko @apparentlymart