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On Mon, 2009-08-24 at 10:57 -0400, Chris PeBenito wrote: > On Mon, 2009-08-24 at 10:04 -0400, Stephen Smalley wrote: > > On Mon, 2009-08-24 at 09:54 -0400, Chris PeBenito wrote: > > > I took the current release of libsemanage and added the patch to add a > > > bzip blocksize option[1]. The modules in my store were already > > > compressed with the stock release. I put bzip-blocksize=0 in my > > > semanage.conf and I do semodule -B and get: > > > > > > libsepol.module_package_read_offsets: wrong magic number for module > > > package: expected 0xf97cff8f, got 0x39685a42 (No such file or > > > directory). > > > libsemanage.semanage_load_module: Error while reading from module > > > file /etc/selinux/strict/modules/tmp/modules/apm.pp. (No such file or > > > directory). > > > semodule: Failed! > > > > > > If I do semodule -l, it will also get the magic number error. If I > > > remove the blocksize option, it works again. I was able to reinsert all > > > of the modules to get it working again with the blocksize 0 option. > > > > > > [1] http://userspace.selinuxproject.org/trac/changeset/ee9827000137fed2d3300124115fc1572acafe2f > > > > Yes, that's what I would expect. The expectation is that either one > > would set that option before installing the policy for the first time, > > or that one completely re-installs the policy after setting that option. > > Can we have a little better handling of this case? I don't mind > reinstalling the policy, but the error messages aren't helpful. In > addition, with semodule -l being broken, I have to look into the module > store to see what modules are installed or guess. Seems like it is just as easy to just support pre-existing compressed modules, see below. Explicitly probe for the bzip2 magic string prefix and fall through to BZ2_bzReadOpen() if the module is bzipped even if bzip-blocksize=0. Thus bzip-blocksize=0 will prevent any further compression of subsequently installed/updated modules, but will continue to function with existing compressed modules. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> |
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