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[perl #129075] perl Perl_mess_sv() memory corruption

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From:
Dan Collins via RT
Date:
August 25, 2016 14:16
Subject:
[perl #129075] perl Perl_mess_sv() memory corruption
Message ID:
rt-4.0.24-29921-1472134594-319.129075-15-0@perl.org
This appears to be a very complicated duplicate of RT #129027. This one spews debug output for about 30 seconds, and it doesn't actually segfault for me.

It's a null deref, the pointer is correctly zeroed and then incorrectly used (it's dereferencing 0x21 because that's the offset into the struct), so not a security bug. My patch in that ticket should also fix this, but I'm not sure because I can't actually repro.

-- 
Respectfully,
Dan Collins

---
via perlbug:  queue: perl5 status: new
https://rt.perl.org/Ticket/Display.html?id=129075

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