Re: do_coredump and O_NOFOLLOW

From: gshan
Date: Wed Aug 15 2007 - 04:04:40 EST


Bernd Eckenfels wrote:
In article <46C290F6.2090309@xxxxxxxxxxxxxxxxxx> you wrote:
I found that O_NOFOLLOW is used for opened core file in Linux 2.6.10.

I think that is for security reasons, otherwise one has to (atomically)
check who is the owner of the symlink and where it points to. If you dont
have hostile users on your system you might be able to remove it, but it is
not a good idea in the general public.

Maybe we need a coreadm tool like Solaris has, where you can put the
corefiles where you want. That would change the corepattern to include a
path and be specific to a process (tree).

Gruss
Bernd
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Bernd, Thanks for your reply. I don't think there are any hostile users on the system. So it's relatively of security. I didn't hear of coreadm tool before, Linux will become more powerful with coreadm.
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