Messages in this thread | | | Date | Thu, 10 Jan 2002 12:56:48 -0800 | From | Chris Wright <> | Subject | Re: absolute path of a process (as the credential of a process) |
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* Senhua Tao (stao@nbnet.nb.ca) wrote:
<some details snipped>
> The ip filter checking can be done in sys_connect(). That is the problem > that I am having. I try to get the absolute path of the current process > which calls connect() to against the entries in the config file (they > also have to be translated to absolute path) and get lost.
if you look at the code in fs/proc/base.c::proc_exe_link() you can see how the absolute pathname is gathered (note: only on execve is the VM_EXECUTABLE flag set). basically you need the dentry and vfsmount of the file. btw, you are only stopping tcp and bound udp if you hook in sys_connect, perhaps you should consider the sendmsg family as well. also, if the trojan is a server you have not protected listen/accept or resvmsg so sys_socket may be the best spot to watch.
also, all of this can be done using the LSM framework. (see lsm.immunix.org for patches).
cheers, -chris - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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