Problem starting Oracle when Linux boots

Hello,

 

We recently purchased Dell PowerEdge 2850 servers with Red Hat Enterprise Linux ES 4 pre-loaded.  Dell had just loaded the base version of RHEL 4- no updates.  I installed Oracle10g R2 and set it up to start automatically, by creating /etc/init.d/dbora, and adding soft links to /etc/rc3.d and /etc/rc5.d.  I rebooted the machine and Oracle started up fine.  Then I loaded all the updates from RHN, including all the kernel updates.  When I next rebooted my machine, Oracle did not start.  The server console appeared to hang during startup.  When I ssh'd in from another machine, I saw that the machine was hung trying to run dbora. Specifically, it was hung trying to su to the oracle user. /var/log/messages showed:

Mar 21 10:23:27 redhatcaddb7 su(pam_unix)[2781]: session opened for user oracle by (uid=0)
Mar 21 10:23:27 redhatcaddb7 dbora: Do you want to choose a different one?

I know this is affected by the SELinux settings, because I tried disabling SELinux and the script worked when I rebooted.  What's the simplest way to configure SELinux to resolve this issue, without having to completely disable it?

Thanks,
Heather