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 ! 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
