Re: NetBSD/vax

[Martin Husemann <martin%duskware.de@localhost>]

On Sat, Mar 21, 2020 at 10:56:27PM +0100, sadness wrote:
> [   1.0600080] scsibus0: waiting 2 seconds for devices to settle...
> [   3.0900080] r0=00000000 r1=80f1c800 r2=80f1c800 r3=80f1c974
> r4=00004000 r5=0000004c r6=80f1a020 r7=80f1ccd8
> [   3.0900080] r8=00000000 r9=00000000 r10=80f1a020 r11=00000000
> [   3.0900080] ap=82f33cc4 fp=82f33ca8 sp=00000000 pc=80007780
> [   3.0900080] panic: SEGV in kernel mode: pc 0x80007780 addr 0x44

This is a NULL deref in:

(gdb) list *(0x80007780)
0x80007780 is in si_dma_alloc (../../../../arch/vax/vsa/ncr.c:278).
273     found:
274             dh = &sc->ncr_dma[i];
275             dh->dh_flags = SIDH_BUSY;
276             dh->dh_addr = ncr_sc->sc_dataptr;
277             dh->dh_len = xlen;
278             dh->dh_proc = xs->bp->b_proc;
279     
280             /* Remember dest buffer parameters */
281             if (xs->xs_control & XS_CTL_DATA_OUT)
282                     dh->dh_flags |= SIDH_OUT;


Martin