Messages in this thread | | | Subject | Re: Linux 2.1.125 doesn't dump core on SIGSEGV | Date | Tue, 20 Oct 1998 22:55:27 +0100 | From | David Woodhouse <> |
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chris@cybernet.co.nz said: > Because the VFS doesn't support this - and it still doesn't help in > the hard link instance.
> I've yet to here why stat then a sanity check won't work.
In the coredump case, I'm not sure - but in general it's because there's a race condition. Someone can put the 'evil' symlink in place between the stat() and the open().
Even in the coredump case there's a race, but presumably there's a lock somewhere that we can use to make it seem atomic.
---- ---- ---- David Woodhouse David.Woodhouse@mvhi.com Office: (+44) 1223 810302 Project Leader, Process Information Systems Mobile: (+44) 976 658355 Axiom (Cambridge) Ltd., Swaffham Bulbeck, Cambridge, CB5 0NA, UK. finger dwmw2@ferret.lmh.ox.ac.uk for PGP key.
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