:The vn structure appears to NOT be corrupt. Seems like a race if
:vn->sc_cred goes from NULL to non-NULL between frame 6 and 5. Could
:this be related to my recent link_elf change (setting p to proc0 if p
:is NULL)?
:
:Joe
Hmm. If devfs is racing access to that field then try changing the
vnsetcred() code around a bit to this:
struct ucred *ocred
...
/*
* Set credits in our softc
*/
ocred = vn->sc_cred;
vn->sc_cred = crdup(cred);
if (ocred)
crfree(ocred);
If the race is more involved then that (assuming it is a race), we
may have to call crhold() and friends whenever we use vn->sc_cred.
-Matt
Matthew Dillon
<dillon@backplane.com>