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From 12e1284a67e5e3404c704c3f864749fd9f04c7c4 Mon Sep 17 00:00:00 2001
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From: Tony Cook <tony@develop-help.com>
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Date: Wed, 7 Aug 2019 14:58:14 +1000
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Subject: [PATCH] PerlIO::Via: check arg is non-NULL before using it.
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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I can't find any code in core that ends up calling the _pushed handler
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with arg == NULL, but PerlIO_push() is API, and there might be
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CPAN or DarkPAN code out there that does, escpecially since there's
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a check for arg being non-NULL further down.
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CID 169261.
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Signed-off-by: Petr Písař <ppisar@redhat.com>
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---
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ext/PerlIO-via/via.xs | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/ext/PerlIO-via/via.xs b/ext/PerlIO-via/via.xs
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index d91c6855fc..8456242bc0 100644
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--- a/ext/PerlIO-via/via.xs
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+++ b/ext/PerlIO-via/via.xs
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@@ -134,8 +134,8 @@ PerlIOVia_pushed(pTHX_ PerlIO * f, const char *mode, SV * arg,
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{
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IV code = PerlIOBase_pushed(aTHX_ f, mode, Nullsv, tab);
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- if (SvTYPE(arg) >= SVt_PVMG
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- && mg_findext(arg, PERL_MAGIC_ext, &PerlIOVia_tag)) {
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+ if (arg && SvTYPE(arg) >= SVt_PVMG
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+ && mg_findext(arg, PERL_MAGIC_ext, &PerlIOVia_tag)) {
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return code;
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}
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--
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2.21.0
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