Benjamin Herrenschmidt <b...@kernel.crashing.org> wrote on 06/10/2009 00:37:28: > > On Tue, 2009-10-06 at 00:31 +0200, Joakim Tjernlund wrote: > > > > regs or regs->nip is NULL? Either one does not make sense > > In any case it might be a secondary problem as DAR is NULL already > > when you > > enter the page fault. > > > > > > insn = *((unsigned long *)regs->nip); > > > c000e110: 80 a9 00 00 lwz r5,0(r9) > > > > > > fails. > > > > hmm, I wonder if you managed to invalidate the a kernel TLB? > > Are you using pinned kernel TLBs? > > You should not dereference a user address like that. Use get_user !
Ah, forgot about that. Will change > > Obviously you got 0 in SRR0 for some reason (somebody tried to jump > to 0, either intentionally or as a result of some other problem) and > the above will crash the kernel when it happens. > > Cheers, > Ben. > > > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev