This is curious.... I've straced gaim both under strict/enforcing and strict/permissive. It appears that under strict/enforcing, a call to 'mprotect(..., ..., PROT_READ|PROT_WRITE)' fails, and gaim segv faults. This same call succeeds under strict/permissive, and gaim then starts successfully. This also seems to be where the AVC to /lib/ld-2.3.3.so is produced. Here is the bugzilla: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=133505 tom On Fri, 24 Sep 2004 08:21:22 -0700, Tom London <selinux@xxxxxxxxx> wrote: > Still get /lib/ld-2.3.3.so avc with latest rawhide gtk2 download. > > I'm not sure its the right place, but I'll bugzilla this agains glibc. > > tom > > > > On Fri, 24 Sep 2004 07:26:14 -0700, Tom London <selinux@xxxxxxxxx> wrote: > > When in strict/enforcing, mozilla fails to start because or the > > /lib/ld-2.3.3.so 'violation'. > > > > I get the .fonts.cache avc when running in permissive mode. I haven't > > modified the policy to allow the /lib/ld-2.3.3.so access to see the > > effect of this failing. > > > > Regarding the /lib/ld-2.3.3.so avc, I'm noticing this when I try to > > start firefox, thunderbird and gaim, but nothing else.. Could it also > > be a gtk2 problem? > > > > tom > > > > > > > > On Fri, 24 Sep 2004 00:18:05 -0400, Colin Walters <walters@xxxxxxxxxx> wrote: > > > On Thu, 2004-09-23 at 20:33 -0700, Tom London wrote: > > > > After being on the road for a bit, I did a 'yum update' to grab the new stuff. > > > > > > > > After doing so (>300 packages), running strict/enforcing, > > > > firefox and gaim fail to start: > > > > > > > > Sep 23 20:10:29 fedora kernel: audit(1095995429.976:0): avc: denied > > > > { write } for pid=4755 path=/lib/ld-2.3.3.so dev=hda2 ino=3178536 > > > > scontext=user_u:user_r:user_mozilla_t > > > > tcontext=system_u:object_r:ld_so_t tclass=file > > > > > > That is bizarre. My guess is some recent glibc change. > > > > > > > Sep 23 20:10:31 fedora kernel: audit(1095995431.164:0): avc: denied > > > > { unlink } for pid=4755 exe=/usr/lib/firefox-0.10.0/firefox-bin > > > > name=.fonts.cache-1 dev=hda2 ino=2752979 > > > > scontext=user_u:user_r:user_mozilla_t > > > > tcontext=user_u:object_r:user_home_t tclass=file > > > > > > The fontconfig cache as it's currently implemented is going to be a > > > perennial problem for SELinux. Any application that uses fontconfig > > > will want to read and write to the cache file. > > > > > > Currently the fontconfig library has a bit of code: > > > FcBool > > > FcGlobalCacheSave (FcGlobalCache *cache, > > > const FcChar8 *cache_file) > > > { > > > /* ... */ > > > #if defined (HAVE_GETUID) && defined (HAVE_GETEUID) > > > /* Set-UID programs can't safely update the cache */ > > > if (getuid () != geteuid ()) > > > return FcFalse; > > > #endif > > > > > > But there's really no equivalent to that check for SELinux. > > > > > > A short term solution might be to give .fonts.cache-1 its own type by > > > patching fontconfig to put it in a ~/.fontconfig directory which has a > > > type user_font_cache_t that we can statically assign, and > > > when .fonts.cache-1 is created in that directory it should inherit the > > > type, so it won't just be user_home_t. Then for every user domain > > > except user_t we just dontaudit writes to it. > > > > > > Was mozilla actually not starting because of this? That would probably > > > be a bug in the fontconfig libraries. > > > > > > A longer term solution would be to make the fontconfig cache a daemon > > > that controls access to fonts more precisely. > > > > > > > > > > > > -- > > > fedora-selinux-list mailing list > > > fedora-selinux-list@xxxxxxxxxx > > > http://www.redhat.com/mailman/listinfo/fedora-selinux-list > > > > > > > > > > > > > > > > -- > > Tom London > > > > > -- > Tom London > -- Tom London
