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Michael Paquier 0b0041b942 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 `46ab07ffda` 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 <exclusion@gmail.com> Discussion: https://postgr.es/m/c516a0d9-4406-47e3-9087-5ca5176ebcf9@gmail.com Backpatch-through: 14	2 months ago
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xml2.sql	…

Michael Paquier 0b0041b942 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 46ab07ffda 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 <exclusion@gmail.com>
Discussion: https://postgr.es/m/c516a0d9-4406-47e3-9087-5ca5176ebcf9@gmail.com
Backpatch-through: 14

2 months ago

xml2.sql

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