Re: [sqlsmith] Segfault in expand_tuple

From: Andres Freund <andres(at)anarazel(dot)de>
To: Andreas Seltenreich <seltenreich(at)gmx(dot)de>, Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: [sqlsmith] Segfault in expand_tuple
Date: 2018-04-07 19:32:15
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On 2018-04-07 21:28:39 +0200, Andreas Seltenreich wrote:
> the following query triggers a segfault for me when run against the
> regression database. Testing was done with master at 039eb6e92f.
> Backtrace below.

Andrew, that looks like it's in your area?

> Core was generated by `postgres: smith regression [local] SELECT '.
> Program terminated with signal SIGSEGV, Segmentation fault.
> (gdb) bt
> #0 0x0000556c14759cb8 in expand_tuple (targetHeapTuple=targetHeapTuple(at)entry=0x0,
> targetMinimalTuple=targetMinimalTuple(at)entry=0x7ffe8088a118, sourceTuple=<optimized out>, tupleDesc=<optimized out>)
> at heaptuple.c:984
> #1 0x0000556c1475bb46 in minimal_expand_tuple (sourceTuple=<optimized out>, tupleDesc=<optimized out>) at heaptuple.c:1015
> #2 0x0000556c14917177 in ExecCopySlotMinimalTuple (slot=<optimized out>) at execTuples.c:631
> #3 0x0000556c14ba8ada in copytup_heap (state=0x556c16c4f5e8, stup=0x7ffe8088a180, tup=<optimized out>) at tuplesort.c:3585
> #4 0x0000556c14baf8e6 in tuplesort_puttupleslot (state=state(at)entry=0x556c16c4f5e8, slot=<optimized out>) at tuplesort.c:1444
> #5 0x0000556c14937791 in ExecSort (pstate=0x556c16c3ac50) at nodeSort.c:112
> #6 0x0000556c1493c6f4 in ExecProcNode (node=0x556c16c3ac50) at ../../../src/include/executor/executor.h:239
> #7 begin_partition (winstate=winstate(at)entry=0x556c16c3a6b8) at nodeWindowAgg.c:1110
> #8 0x0000556c149403aa in ExecWindowAgg (pstate=0x556c16c3a6b8) at nodeWindowAgg.c:2094
> #9 0x0000556c1490c0ca in ExecProcNode (node=0x556c16c3a6b8) at ../../../src/include/executor/executor.h:239


Andres Freund

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