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


bug #22082: selinux: Segmentation fault while testing

Submitted by:  Sam Steingold <sds>
Submitted on:  Tue 22 Jan 2008 08:07:44 PM UTC  
Category:  None Severity:  3 - Normal
Item Group:  crash Status:  Fixed
Privacy:  Public Assigned to:  Bruno Haible <haible>
Open/Closed:  Closed

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Thu 02 Feb 2017 11:24:08 PM UTC, comment #4:

Thanks for the report. This is fixed now:

Bruno Haible <haible>
Project AdministratorIn charge of this item.
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:

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
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"
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:


The following is my SELinux log which I think tells the reason what caused
segmentation fault when I tested clisp
/.../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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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    Thu 02 Feb 2017 11:24:22 PM UTC haible Summaryselinux: Segementation fault while testing => selinux: Segmentation fault while testing
    Thu 02 Feb 2017 11:24:08 PM UTC haible StatusNone => Fixed
        Open/ClosedOpen => Closed
    Tue 28 Apr 2009 05:41:55 PM UTC sds Item GroupNone => crash

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