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[Qemu-devel] bug report : kqemu and self-writing code


From: Even Rouault
Subject: [Qemu-devel] bug report : kqemu and self-writing code
Date: Mon, 1 May 2006 21:53:50 +0200
User-agent: KMail/1.9.1

Guest OS : Linux 2.6.15-1.2054_FC5 i686 (Fedora Core 5 i386)
Host OS: Linux 2.6.12-10-amd64-k8 #1 x86_64 (Ubuntu 5.10 amd64)
QEMU Version : today CVS compiled with kqemu support
KQEMU : 1.3.0pre6
Binary used : qemu-system-x86-64 (so kqemu user-mode is used)

I'm running the simple C code attached. With kqemu user-mode, this fails 
(sigsegv) with the following warning in dmesg :

audit(1146505373.813:12): avc:  denied { execheap } for pid=1860 
comm="selfmodifying scontext=user_u:system_r:unconfined_t:s0 
tcontext=user_u:system_r:unconfined_t:s0 tclass=process
Erreur de segmentation

Without kqemu enabled, it runs fine.

Attachment: selfmodifying.c
Description: Text Data


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