Description of problem: I have enabled the confined nspluginwrapper boolean which seems to work fine but on some flash sites the plugin segfaults. dmesg shows this avc: ---------------- ype=1400 audit(1246719727.017:26): avc: denied { read } for pid=23711 comm="npviewer.bin" name="pulse-shm-4260538576" dev=tmpfs ino=24002 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file type=1400 audit(1246719727.206:27): avc: denied { read } for pid=23711 comm="npviewer.bin" name="pulse-shm-4260538576" dev=tmpfs ino=24002 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file type=1400 audit(1246719730.752:28): avc: denied { associate } for pid=23711 comm="npviewer.bin" key=-583345475 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 tclass=shm type=1400 audit(1246719730.752:29): avc: denied { associate } for pid=23711 comm="npviewer.bin" key=-583345475 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 tclass=shm npviewer.bin[23711]: segfault at a010 ip 000000000101d6b0 sp 00000000fffe7390 error 4 in libflashplayer.so[dcc000+952000] ---------------- Version-Release number of selected component (if applicable): selinux-policy-3.6.12-53.fc11.noarch How reproducible: Sometimes seems like not all flash sites are effected Steps to Reproduce: 1. surf some flash sites with the nsplugin confined Actual results: AVC + segfault Expected results: no avc and no segfault. Additional info: audit2allow -d #============= ifconfig_t ============== allow ifconfig_t security_t:file read; #============= mysqld_safe_t ============== allow mysqld_safe_t mysqld_db_t:dir { write remove_name }; allow mysqld_safe_t mysqld_var_run_t:sock_file unlink; #============= nsplugin_t ============== allow nsplugin_t tmpfs_t:file { read getattr open }; allow nsplugin_t unconfined_execmem_t:shm { read write getattr associate destroy (Note there are other issues here too but the last one is this specific one)
First two ifconfig_dt and mysqld_safe_t are fixed in latestfc11 policy I believe. What process is running as unconfined_execmem_t? Firefox should not be? Looks like a labeled problem and the tmpfs_t file got created with the wrong context.
(In reply to comment #1) > First two ifconfig_dt and mysqld_safe_t are fixed in latestfc11 policy I > believe. OK, which version are you refering to? > What process is running as unconfined_execmem_t? Firefox should not be? It is firefox... ps auxZ | grep execm unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 linux 7598 1.7 8.0 1355932 486024 ? Sl 11:04 10:10 /usr/lib64/firefox-3.5/firefox unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 linux 8615 0.0 0.0 0 0 ? Z 12:09 0:00 [firefox] <defunct> unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 linux 8630 0.0 0.0 0 0 ? Z 12:11 0:03 [firefox] <defunct> unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 linux 31280 0.0 0.0 91080 872 pts/4 S+ 20:30 0:00 grep execm > Looks like a labeled problem and the tmpfs_t file got created with the wrong > context. I have tried to reproduce it and now I only get: type=1400 audit(1246904932.131:6): avc: denied { associate } for pid=31144 comm="npviewer.bin" key=-583345475 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=sem type=1400 audit(1246904932.131:7): avc: denied { associate } for pid=31144 comm="npviewer.bin" key=-583345475 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=sem type=1400 audit(1246905080.052:8): avc: denied { associate } for pid=31144 comm="npviewer.bin" key=-583345475 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=sem type=1400 audit(1246905080.052:9): avc: denied { associate } for pid=31144 comm="npviewer.bin" key=-583345475 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=sem But no crashes. #============= nsplugin_t ============== allow nsplugin_t unconfined_t:sem associate;
WHat is firefox labeled, It should be labed mozilla_exec_t? We should add the associate call.
Miroslav, add allow nsplugin_t $2:sem rw_sem_perms; allow nsplugin_t $2:shm rw_shm_perms; to nsplugin_role_notrans
(In reply to comment #3) > WHat is firefox labeled, It should be labed mozilla_exec_t? ls -Z /usr/bin/firefox -rwxr-xr-x. root root system_u:object_r:bin_t:s0 /usr/bin/firefox ls -Z /usr/lib64/firefox-3.5/firefox -rwxr-xr-x. root root system_u:object_r:mozilla_exec_t:s0 /usr/lib64/firefox-3.5/firefox
optional_policy(` tunable_policy(`allow_unconfined_nsplugin_transition',`', ` gen_require(` type mozilla_exec_t; ') domtrans_pattern(unconfined_t, mozilla_exec_t, unconfined_execmem_t) ') ') That is strange, the policy above says to only transition if the allow_unconfined_nsplugin_transition boolean is turned off?
(In reply to comment #4) > Miroslav, > > add > > allow nsplugin_t $2:sem rw_sem_perms; > allow nsplugin_t $2:shm rw_shm_perms; > > to nsplugin_role_notrans Fixed in selinux-policy-3.6.12-64.fc11
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