Michael Paquier 9cbfafabf9 xml2: Fix failure with xslt_process() under -fsanitize=undefined ...

The logic of xslt_process() has never considered the fact that
xsltSaveResultToString() would return NULL for an empty string (the
upstream code has always done so, with a string length of 0).  This
would cause memcpy() to be called with a NULL pointer, something
forbidden by POSIX.

Like 8fc769ec30 and similar fixes, this is backpatched down to all the
supported branches, with a test case to cover this scenario.  An empty
string has been always returned in xml2 in this case, based on the
history of the module, so this is an old issue.

Reported-by: Alexander Lakhin <[email protected]>
Discussion: https://postgr.es/m/[email protected]
Backpatch-through: 14

2026-03-13 16:06:28 +09:00

..

xml2.sql

xml2: Fix failure with xslt_process() under -fsanitize=undefined

2026-03-13 16:06:28 +09:00