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Re: [PATCH hurd] libports: use protected payloads to optimize the object


From: Samuel Thibault
Subject: Re: [PATCH hurd] libports: use protected payloads to optimize the object lookup
Date: Thu, 23 Apr 2015 01:56:22 +0200
User-agent: Mutt/1.5.21+34 (58baf7c9f32f) (2010-12-30)

Ok, I found the issue as being in gnumach: it was reading from a freed
ipc_port structure, and it happens that the payload was overwritten by
the free slot linked-list pointer. This happens when the destination
port gets down to zero reference right when delivering the message.

Thomas Schwinge, le Mon 20 Apr 2015 13:25:06 +0200, a écrit :
> Yesterday, I upgraded to Debian hurd 0.6-1 packages, and upon running
> binutils/GDB testsuite (configure, make, make install, make check as
> described on
> <http://www.gnu.org/software/hurd/open_issues/binutils.html>), at some
> point that now errors out with SIGLOST (taking the SSH login session with
> it, huh -- probably another problem, similar to

That could be due to that indeed.

Samuel



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