On Fri, 2007-03-09 at 16:13 -0500, Stephen Smalley wrote: > On Fri, 2007-03-09 at 15:23 -0500, Steve Grubb wrote: > > On Friday 09 March 2007 14:31, Camilo Y. Campo wrote: > > > The cat command failed and audit is saying "success". A bit strange for > > > me. Could anybody clarify this point for me, please? > > > > It works correctly for me: > > > > fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0 > > open("/selinux/disable", O_RDONLY|O_LARGEFILE) = -1 EACCES (Permission > > denied) > > You got EACCES rather than EINVAL, so your test didn't reach the same > point in the code path. Try it as root (and with appropriate SELinux > role/domain if under -strict or -mls).
I tried it, and the open succeeds, but the read fails with -EINVAL because the underlying pseudo file doesn't implement a read method at all for that node. So the audit is only capturing the open, which was successful. > > > write(2, "cat: ", 5cat: ) = 5 > > > > type=PATH msg=audit(03/09/2007 15:21:10.652:947) : item=0 > > name=/selinux/disable inode=13 dev=00:0e mode=file,200 ouid=root ogid=root > > rdev=00:00 obj=system_u:object_r:security_t:s0 > > type=CWD msg=audit(03/09/2007 15:21:10.652:947) : cwd=/home/sgrubb > > type=SYSCALL msg=audit(03/09/2007 15:21:10.652:947) : arch=i386 > > syscall=open > > success=no exit=-13(Permission denied) a0=bfca4954 a1=8000 a2=0 a3=8000 > > items=1 ppid=4740 pid=4741 auid=sgrubb uid=sgrubb gid=sgrubb euid=sgrubb > > suid=sgrubb fsuid=sgrubb egid=sgrubb sgid=sgrubb fsgid=sgrubb tty=pts0 > > comm=cat exe=/bin/cat subj=user_u:system_r:unconfined_t:s0 key=(null) > > > > Try running with strace so you can see the open syscall. > > > > -Steve > > > > -- > > Linux-audit mailing list > > Linux-audit@redhat.com > > https://www.redhat.com/mailman/listinfo/linux-audit -- Stephen Smalley National Security Agency -- Linux-audit mailing list Linux-audit@redhat.com https://www.redhat.com/mailman/listinfo/linux-audit