openresty / openresty/lua-nginx-module
coroutine.wrap causes segfault in some cases
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Description
The following code when ran with resty CLI will cause segfault,
it seems to be caused by the coroutine.wrap API introduced by
https://github.com/openresty/lua-nginx-module/pull/1239.
I've tested on lua-nginx-module shipped with 1.21.4.1 and 1.19.9.2, but it may also trigger on older versions.
local fn = function(r)
coroutine.wrap(
function()
error("aaaaaa")
end
)()
end
local co = coroutine.create(fn)
coroutine.resume(co)
debug.traceback(co)
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First steps
- Read the whole issue, then the project's contributing guide.
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Research direction
Run the provided Lua reproducer with the resty CLI on the affected lua-nginx-module versions, then inspect the coroutine.wrap implementation introduced by pull request 1239. Done means the reproducer no longer segfaults and the regression is covered by an appropriate test.
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Assessment
- Tech stack
- c, lua
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100