tree 52623e55feb7f1f2ccc53e1917c7915820334a37
parent cfbfface1728bedbdfdb26791a6e8babeb38ddb1
author Jim Apple <jbapple-impala@apache.org> 1532472056 -0700
committer Impala Public Jenkins <impala-public-jenkins@gerrit.cloudera.org> 1561440585 +0000

IMPALA-5031: Fix undefined behavior: memset NULL

memset has undefined behavior when its first argument is NULL. The
instance fixed here was found by Clang's undefined behavior sanitizer.

It was found in the end-to-end tests. The interesting part of the
stack trace is:

be/src/util/bitmap.h:78:12: runtime error: null pointer passed as argument 1, which is declared to never be null
/usr/include/string.h:62:79: note: nonnull attribute specified here
    #0 0x2ccb59b in Bitmap::SetAllBits(bool) be/src/util/bitmap.h:78:5
    #1 0x2cb6b9e in NestedLoopJoinNode::ResetMatchingBuildRows(RuntimeState*, long) be/src/exec/nested-loop-join-node.cc:176:27
    #2 0x2cb5ad6 in NestedLoopJoinNode::Open(RuntimeState*) be/src/exec/nested-loop-join-node.cc:90:43

Change-Id: I804f642f4be3b74c24f871f656c5147ee226d2c8
Reviewed-on: http://gerrit.cloudera.org:8080/11042
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>