Re: [uml-devel] uml-patch-2.4.18-10

[Matt Z. <md...@de...>]

On Fri, Mar 22, 2002 at 11:40:48PM -0500, Jeff Dike wrote:

> > This version dies on me, consistently, when I bring up networking:
> > 
> > * insmod tun
> > insmod: a module named tun already exists
> > Using /lib/modules/2.4.18/kernel/drivers/net/tun.o
> > * ifconfig tap0 192.168.10.1 netmask 255.255.255.255 up
> > * bash -c echo 1 > /proc/sys/net/ipv4/ip_forward
> > Seg fault in signals
> 
> Hmmm, networking works fine for me.
> 
> That's the tracing thread (probably) segfaulting, so can you attach gdb to
> it and get a stack trace?

#0  signal_segv (sig=11) at trap_user.c:42
#1  <signal handler called>
#2  arch_validate (page=0xa0877780, mask=496, order=0) at mem.c:229
#3  0xa002a548 in __get_free_pages (gfp_mask=21, order=21)
    at /space/tmp/mdz/user-mode-linux-2.4.18.10um/kernel-source-2.4.18/include/linux/mm.h:376
#4  0xa00280ac in kmem_cache_grow (cachep=0xa0800260, flags=496) at slab.c:495
#5  0xa0028429 in kmalloc (size=99, flags=496) at slab.c:1357
#6  0xa00f66b2 in um_kmalloc (size=99) at process_kern.c:544
#7  0xa00fb5ee in read_output (fd=54, output_out=0xa2543940) at net_user.c:63
#8  0xa00fb95a in change_tramp (arg=0xa2543930) at net_user.c:175
#9  0xa00f644b in do_proc_op (t=0xa2540000, proc_id=0) at process_kern.c:421
#10 0xa00f43df in signals (init_proc=0xa00f4c68 <start_kernel_proc>, 
    sp=0xa018fffc) at trap_user.c:284
#11 0xa00f4ffa in linux_main (argc=11, argv=0xbffff7d4) at um_arch.c:338
#12 0xa000a2d5 in main (argc=11, argv=0xbffff7d4, envp=0xbffff804)
    at arch/um/main.c:105
#13 0xa0102255 in __libc_start_main () at hostfs_kern.c:731

#2  arch_validate (page=0xa0877780, mask=496, order=0) at mem.c:229
229                     current->thread.fault_addr = (void *) addr;

-- 
 - mdz