linux-kernel - Crash by update of shared libraries

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Message-ID: <5303BA6F.9090704@enst-bretagne.fr>
Date:	Tue, 18 Feb 2014 20:54:23 +0100
From:	Florent Fourcot <florent.fourcot@...t-bretagne.fr>
To:	linux-kernel@...r.kernel.org
Subject: Crash by update of shared libraries

Hello,

my system crash by libraries update. Some steps to reproduce the
bug (without crash of the all system):

 $ export LD_PRELOAD=./libfake.so.1
 $ cp libfake.so.1 /tmp/
 $ cp /tmp/libfake.so.1 .
 => Bus error

The cp crash, since the file of the loaded library changed (and the copy
failed of course, the new file is now empty).
All software with a library loaded (with ld) will crash as well (for
example by system updating of the libc: the pid 1 will crash).

Tested on a Linux kernel 3.14.0-rc3.

Regards,

-- 
Florent.
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