| From: | Andreas Seltenreich <seltenreich(at)gmx(dot)de> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [sqlsmith] crash in RestoreLibraryState during low-memory testing |
| Date: | 2017-10-03 07:04:50 |
| Message-ID: | 878tgsu2y5.fsf@ansel.ydns.eu |
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| Thread: | |
| Lists: | pgsql-hackers |
Tom Lane writes:
> Presumably somebody could dig into the libc source code and prove or
> disprove this, though it would sure help to know exactly what platform
> and version Andreas is testing on.
This is the code in glibc-2.24 around the crash site:
,----[ glibc-2.24/elf/dl-load.c:442 ]
| to_free = cp = expand_dynamic_string_token (l, cp, 1);
|
| size_t len = strlen (cp);
`----
…while expand_dynamic_string_token will indeed return NULL on a failed
malloc. Code in the most recent glibc looks the same, so I'll carry
this issue over to the glibc bugzilla then.
Sorry about the noise…
Andreas
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