buglibffcall - foreign function call libraries - Bugs: bug #22082, selinux: Segementation fault while...

 
 

bug #22082: selinux: Segementation fault while testing

Submitted by:  Sam Steingold <sds>
Submitted on:  Tue 22 Jan 2008 08:07:44 PM UTC  
 
Category: NoneSeverity: 3 - Normal
Item Group: crashStatus: None
Privacy: PublicAssigned to: Bruno Haible <haible>
Open/Closed: Open

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Thu 28 Feb 2008 03:41:41 PM UTC, comment #3:

Actually, I think that the failure on x86_64 (at least Debian bug #451356) is a different bug, having nothing to do with the NX bit, because it fails on a different test. (I'm not sure whether Debian bug #453242 is the same bug as this.)

Hubert Chathi <uhoreg>
Wed 23 Jan 2008 09:02:44 PM UTC, comment #2:

From what I can tell, this bug also causes failures on Opteron CPUs, since they have the NX bit. (e.g. see http://bugs.debian.org/451356 and http://bugs.debian.org/453242)

Hubert Chathi <uhoreg>
Tue 22 Jan 2008 08:22:11 PM UTC, comment #1:

http://sourceforge.net/tracker/index.php?func=detail&aid=1531290&group_id=1355&atid=101355
this is probably the same bug:
The output from the compilation is:
/bin/sh ./libtool --mode=link gcc -x none test2.o trampoline.lo -o test2
gcc -x none test2.o trampoline.o -o test2
./test1
trampoline: cannot make memory executable
make[2]: *** [check] Aborted

The output in audit.log is:
type=AVC msg=audit(1154277453.270:515): avc: denied {
execheap } for pid=6764 comm="test1"
scontext=user_u:system_r:unconfined_t:s0
tcontext=user_u:system_r:unconfined_t:s0 tclass=process

Thus there is a violation of the heap execution
policy of SELinux.

Sam Steingold <sds>
Project Administrator
Tue 22 Jan 2008 08:07:44 PM UTC, original submission:

http://sourceforge.net/tracker/index.php?func=detail&aid=1761791&group_id=1355&atid=101355

The following is my SELinux log which I think tells the reason what caused
segmentation fault when I tested clisp
/****************************************************/
Application
/.../clisp-2.41/build-with-gcc/callback/trampoline_r/test1 attempted to change the access protection of memory on the heap (e,g., allocated using malloc). This is a potential security problem.

Applications should not be doing this. Applications are sometimes coded incorrectly and request this permission.

The SELinux Memory Protection Tests web page explains how to remove this requirement.
/*****************************************************/

Sam Steingold <sds>
Project Administrator

 

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    Date Changed By Updated Field Previous Value => Replaced By
    Tue 28 Apr 2009 05:41:55 PM UTCsdsItem GroupNone=>crash

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