Re: kern/58898: Crash when testing camera in chromium

[Robert Bagdan <kikadf.01%gmail.com@localhost>]

On Thu, Dec 12, 2024 at 5:01 PM Taylor R Campbell <riastradh%netbsd.org@localhost> wrote:
>
> Can you please share the output of dmesg and the following gdb
> commands on the crash dump?
>
> (gdb) disas *(videoclose+0xbb)
> (gdb) print *(struct video_softc *)video_cd.cd_devs[0]->dv_private
>
> Can you share the disassembly of videoclose in your netbsd.4 kernel
> with `objdump -dr netbsd.4' (and selecting the relevant part)?
>
> Can you share what changes you have in your tree?  And can you make
> sure you have a clean build?  It looks like there might be mismatches
> between your netbsd.gdb, your netbsd.4.core, and the source code,
> which risks send everyone on wild goose chases if not resolved.

I don't have changes in NetBSD tree, I’m on the 10.0 branch, upgraded
with sysupgrade auto. Here is my /etc/release relevant part:
Build information:
         Build date   Fri Dec  6 20:38:43 UTC 2024
           Built by   builder%localhost.NetBSD.org@localhost
           Build ID   202412081740Z

Because of the gdb output, I’m just clone the NetBSD src from github,
this is the git log output:
commit 313a9eb5b1b8b899e5611e78063c2949affc811d (HEAD -> netbsd-10,
origin/netbsd-10)
Author: snj <snj%NetBSD.org@localhost>
Date:   Fri Dec 6 20:38:43 2024 +0000

   tickets 1024-1026
…

Some dates and sizes:
/var/crash $ ls -l netbsd.4*
-rw-------  1 root  wheel    2428478 Dec  9 13:02 netbsd.4
-rw-------  1 root  wheel  583708184 Dec  9 13:02 netbsd.4.core
ls -l /netbsd
-rw-r--r--  1 root  wheel  29528376 Dec  9 12:48 /netbsd

I share ‘dmesg -M netbsd.4.core -N netbsd.4 > dmesg.txt’ in
https://pastebin.com/raw/jWLjzQbw . This is all that I got.

I run ‘gdb /netbsd --eval-command="target kvm netbsd.4.core"’, then
your suggested gdb commands, I share the output in
https://pastebin.com/raw/wQL0uN0z .

The ‘objdump -dr netbsd.4’ all output:
netbsd.4:     file format elf64-x86-64

>From ‘objdump -dr /netbsd’ I share the videoclose part in
https://pastebin.com/raw/aXzSvGC1 .