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Avoid potential buffer overflow crash

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A pointer to a C string was treated as a pointer to a "name" datum and
passed to SPI_execute_plan().  This pointer would then end up being
passed through datumCopy(), which would try to copy the entire 64 bytes
of name data, thus running past the end of the C string.  Fix by
converting the string to a proper name structure.

Found by LLVM AddressSanitizer.
This commit is contained in:
Peter Eisentraut 2013-11-23 07:25:37 -05:00
parent 6bc68af1dc
commit 0f8ff3e467
1 changed files with 1 additions and 1 deletions
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2
src/backend/utils/adt/ruleutils.c
View File

@ -633,7 +633,7 @@ pg_get_viewdef_worker(Oid viewoid, int prettyFlags, int wrapColumn)
* Get the pg_rewrite tuple for the view's SELECT rule
*/
args[0] = ObjectIdGetDatum(viewoid);
args[1] = PointerGetDatum(ViewSelectRuleName);
args[1] = DirectFunctionCall1(namein, CStringGetDatum(ViewSelectRuleName));
nulls[0] = ' ';
nulls[1] = ' ';
spirc = SPI_execute_plan(plan_getviewrule, args, nulls, true, 2);