Re: Panic at line 602 in file ffs_vnops.c

> ----- Original Message ----- 
> From: "Willem Jan Withagen" <wjw_at_withagen.nl>
>
> > In an attempt to port some compiler tools, I'm testing its memory allocator.
> > And that does not really work, it is a shure way to crash my dual opteron.
> >
> > panic: ffs_write: uio -> uio_resid < 0
> > at line 602 in file /home2/src/sys/ufs/ffs/ffs_vnop.c
> >
> > If I then type 'cont' I'd exepct to get coredump.
> > But it just gives up on 708 buffers, prints the uptime
> > and sits quitely in a corner until I hard-reset it.
> > No other keys will get it back....
> >
> > Before it crashes I first get the inocent LOR on ....swap...:1313
> > The program usually get an invalid pointer allocated with calloc.
> > And as far as I can tell, then crashes on free-ing with this pointer.
> >
> > Any takers on this??
> > Looks to me there are 2 problems:
> >     I'm able to upset allocator with this program.
> >         (If I write the same program, in shorthand, it stays alive)
> >     The system does not want to dump/reboot
>
> To follow up on myself:
>
> 'where' after the crash gives: (copied via paper)
> ffs_write()   at ... +0x64e
> vn_rdwr()     at ... +0xf1
> vn_rdwr_inchuncks()    at ... +0x77
> elf64_coredump()       at ... +0x1222
> coredump()    at ... +0x5da
> sigexit()     at ... +0x71
> postsig()     at ... +0x30e
> ast()         at ... +0x297
> Xfas_syscall()         at ... +0xdd
>
> ------ syscall(0, FreeBSD ELF64, nosys)
>     rip = 0x20067b8ec
>     rsp = 0x7fffffffe678
>     rbp = 0x2006de6c0
>
> So it looks like the systems want to write a dump, but does not really get
> to write it....
>
> What more can I do??

And even more follow up:
I tried to just get a coredump by going crtl-alt-esc and go 'panic' in ddb.
But ended up with a freeze and:

pmap_invalidate_range: interrupts disabled
at line 664 inf file /home2/src/sys/amd64/amd64/pmap.ccpuid=1

Where I think the last line should read:
    pmap.c cpuid=1

I think I need this fixed before I can start looking at the other problem??

--WjW