fedora-selinux-list-request@xxxxxxxxxx wrote:
Subject:
Error running ffmpeg due to permission denied on library
From:
"Robert Foster" <rfoster@xxxxxxxxxxxxxxxxxxxxxx>
Date:
Thu, 27 Apr 2006 12:41:09 +1000
To:
<fedora-selinux-list@xxxxxxxxxx>
To:
<fedora-selinux-list@xxxxxxxxxx>
Hi,
I'm trying to get ffmpeg working for Gallery2 on FC5, and getting the
following error (from the debug message via Gallery):
Executing: ( "/usr/bin/ffmpeg" "-h" )
2>/MV/webs/Repository/gallery/tmp/g2dbgitTQYC
file_exists(/MV/webs/Repository/gallery/tmp/g2dbgitTQYC)
filesize(/MV/webs/Repository/gallery/tmp/g2dbgitTQYC)
fopen(/MV/webs/Repository/gallery/tmp/g2dbgitTQYC, r, 0)
feof(Resource id #108)
fgets(Resource id #108, 4096)
feof(Resource id #108)
fgets(Resource id #108, 4096)
feof(Resource id #108)
fclose(Resource id #108)
unlink(/MV/webs/Repository/gallery/tmp/g2dbgitTQYC)
Regular Output:
Error Output:
/usr/bin/ffmpeg: error while loading shared libraries: libavcodec.so.51:
cannot enable executable stack as shared object requires: Permission
denied
Status: 127 (expected 0)
A quick look in /usr/lib reveals:
-rwxr-xr-x root root system_u:object_r:textrel_shlib_t
/usr/lib/libavcodec-CVS.so
lrwxrwxrwx root root system_u:object_r:lib_t
/usr/lib/libavcodec.so -> libavcodec-CVS.so
lrwxrwxrwx root root
system_u:object_r:lib_t /usr/lib/libavcodec.so.51 ->
libavcodec-CVS.so
/var/log/audit/audit.log shows:
type=SYSCALL msg=audit(1146010953.133:45163): arch=40000003
syscall=125 success=no exit=-13 a0=bfc5b000 a1=1000 a2=1000007
a3=fffff000 items=0 pid=25005 auid=1000 uid=48 gid=48 euid=48 suid=48
fsuid=48 egid=48 sgid=48 fsgid=48 comm="ffmpeg" exe="/usr/bin/ffmpeg"
type=AVC msg=audit(1146010953.141:45164): avc: denied { execstack }
for pid=25007 comm="ffmpeg"
scontext=user_u:system_r:httpd_sys_script_t:s0
tcontext=user_u:system_r:httpd_sys_script_t:s0 tclass=process
type=SYSCALL msg=audit(1146010953.141:45164): arch=40000003
syscall=125 success=no exit=-13 a0=bf9e8000 a1=1000 a2=1000007
a3=fffff000 items=0 pid=25007 auid=1000 uid=48 gid=48 euid=48 suid=48
fsuid=48 egid=48 sgid=48 fsgid=48 comm="ffmpeg" exe="/usr/bin/ffmpeg"
type=AVC msg=audit(1146010953.213:45165): avc: denied { execstack }
for pid=25009 comm="ffmpeg"
scontext=user_u:system_r:httpd_sys_script_t:s0
tcontext=user_u:system_r:httpd_sys_script_t:s0 tclass=process
type=SYSCALL msg=audit(1146010953.213:45165): arch=40000003
syscall=125 success=no exit=-13 a0=bfbe6000 a1=1000 a2=1000007
a3=fffff000 items=0 pid=25009 auid=1000 uid=48 gid=48 euid=48 suid=48
fsuid=48 egid=48 sgid=48 fsgid=48 comm="ffmpeg" exe="/usr/bin/ffmpeg"
type=AVC msg=audit(1146010953.221:45166): avc: denied { execstack }
for pid=25011 comm="ffmpeg"
scontext=user_u:system_r:httpd_sys_script_t:s0
tcontext=user_u:system_r:httpd_sys_script_t:s0 tclass=process
type=SYSCALL msg=audit(1146010953.221:45166): arch=40000003
syscall=125 success=no exit=-13 a0=bf89b000 a1=1000 a2=1000007
a3=fffff000 items=0 pid=25011 auid=1000 uid=48 gid=48 euid=48 suid=48
fsuid=48 egid=48 sgid=48 fsgid=48 comm="ffmpeg" exe="/usr/bin/ffmpeg"
when I run the page producing the error output.
I tried to set the allow_execstack boolean but it didn't make any
difference.
I'm out of ideas on this one - any help appreciated :)
Robert Foster
General Manager
Mountain Visions P/L http://mountainvisions.com.au
<http://mountainvisions.com.au/>
Mobile: 0418 131 065
I had the same problem when using Kino which also uses ffmpeg. Here is
what I did and it works.
execstack -c /usr/lib/libmp3lame.so.0
execstack -c /usr/lib/libxvidcore.so.4
chcon -t textrel_shlib_t /usr/lib/libavformat.so.50
chcon -t textrel_shlib_t /usr/lib/libavutil.so.49
chcon -t textrel_shlib_t /usr/lib/libavcodec.so.51
This also takes care of the problem with lame-3.96.1-10.rhfc5.at,
libxvidcore4-1.1.0-8.rhfc5.at,
libavformat50-0.4.9-14_cvs20060301.rhfc5.at,
libavutil49-0.4.9-14_cvs20060301.rhfc5.at, and
libavcodec51-0.4.9-14_cvs20060301.rhfc5.at.
Regards,
John
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