| From: | Dmitry Ivanov <d(dot)ivanov(at)postgrespro(dot)ru> |
|---|---|
| To: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Bug in WaitForBackgroundWorkerShutdown() [REL9_5_STABLE] |
| Date: | 2016-08-04 11:47:59 |
| Message-ID: | 1996641.25QjV5kv6m@abook |
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| Lists: | pgsql-hackers |
> Recently I've encountered a strange crash while calling elog(ERROR, "...")
> after the WaitForBackgroundWorkerShutdown() function. It turns out that
> _returns_ inside the PG_TRY()..PG_CATCH() block are *highly* undesirable,
> since they leave PG_exception_stack pointing to a local struct in a dead
> frame, which is an obvious UB. I've attached a patch which fixes this
> behavior in the aforementioned function, but there might be more errors
> like that elsewhere.
Forgot some curly braces, my bad. v2 attached.
--
Dmitry Ivanov
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company
| Attachment | Content-Type | Size |
|---|---|---|
| fix_WaitForBackgroundWorkerShutdown_v2.patch | text/x-patch | 662 bytes |
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