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

["Robert Bagdan via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/58898; it has been noted by GNATS.

From: Robert Bagdan <kikadf.01%gmail.com@localhost>
To: Taylor R Campbell <riastradh%netbsd.org@localhost>
Cc: gnats-bugs%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/58898: Crash when testing camera in chromium
Date: Thu, 12 Dec 2024 19:43:46 +0100

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 On Thu, Dec 12, 2024 at 5:01=E2=80=AFPM Taylor R Campbell <riastradh@netbsd=
 .org>
 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 resend my last message because it was unreadable, sorry)
 
 I don't have changes in NetBSD tree, I=E2=80=99m on the 10.0 branch, upgrad=
 ed
 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=E2=80=99m just clone the NetBSD src from githu=
 b,
 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
 =E2=80=A6
 
 Some date 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 =E2=80=98dmesg -M netbsd.4.core -N netbsd.4 > dmesg.txt=E2=80=99
 in https://pastebin.com/raw/jWLjzQbw . This is all that I got.
 
 I run =E2=80=98gdb /netbsd --eval-command=3D"target kvm netbsd.4.core"=E2=
 =80=99,
 then your suggested gdb commands,
  I share the output in https://pastebin.com/raw/wQL0uN0z .
 
 The =E2=80=98objdump -dr netbsd.4=E2=80=99 all output:
 netbsd.4:     file format elf64-x86-64
 
 >From =E2=80=98objdump -dr /netbsd=E2=80=99 I share the videoclose part
 in https://pastebin.com/raw/aXzSvGC1 .
 
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 <div dir=3D"ltr"><br><br>On Thu, Dec 12, 2024 at 5:01=E2=80=AFPM Taylor R C=
 ampbell &lt;<a href=3D"mailto:riastradh%netbsd.org@localhost";>riastradh%netbsd.org@localhost</a=
 >&gt; wrote:<br>&gt;<br>&gt; Can you please share the output of dmesg and t=
 he following gdb<br>&gt; commands on the crash dump?<br>&gt;<br>&gt; (gdb) =
 disas *(videoclose+0xbb)<br>&gt; (gdb) print *(struct video_softc *)video_c=
 d.cd_devs[0]-&gt;dv_private<br>&gt;<br>&gt; Can you share the disassembly o=
 f videoclose in your netbsd.4 kernel<br>&gt; with `objdump -dr netbsd.4&#39=
 ; (and selecting the relevant part)?<br>&gt;<br>&gt; Can you share what cha=
 nges you have in your tree?=C2=A0 And can you make<br>&gt; sure you have a =
 clean build?=C2=A0 It looks like there might be mismatches<br>&gt; between =
 your netbsd.gdb, your netbsd.4.core, and the source code,<br>&gt; which ris=
 ks send everyone on wild goose chases if not resolved.<br><br>(I resend my =
 last message because it was unreadable, sorry)<br><br>I don&#39;t have chan=
 ges in NetBSD tree, I=E2=80=99m on the 10.0 branch, upgraded=C2=A0<div>with=
  sysupgrade auto. Here is my /etc/release relevant part:<br>Build informati=
 on:<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Build date =C2=A0 Fri Dec =C2=A06 =
 20:38:43 UTC 2024<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Built by =C2=
 =A0 <a href=3D"mailto:builder%localhost.NetBSD.org@localhost";>builder@localhost.NetBS=
 D.org</a><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Build ID =C2=A0 20241=
 2081740Z<br><br>Because of the gdb output, I=E2=80=99m just clone the NetBS=
 D src from github,</div><div>this is the git log output:<br>commit 313a9eb5=
 b1b8b899e5611e78063c2949affc811d (HEAD -&gt; netbsd-10, origin/netbsd-10)<b=
 r>Author: snj &lt;snj%NetBSD.org@localhost&gt;<br>Date: =C2=A0 Fri Dec 6 20:38:43 202=
 4 +0000<br><br>=C2=A0 =C2=A0tickets 1024-1026<br>=E2=80=A6<br><br>Some date=
  and sizes:<br>/var/crash $ ls -l netbsd.4* =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 =C2=A0 =C2=A0 =C2=A0 <br>-rw------- =C2=A01 root =C2=A0wheel =C2=A0 =C2=
 =A02428478 Dec =C2=A09 13:02 netbsd.4<br>-rw------- =C2=A01 root =C2=A0whee=
 l =C2=A0583708184 Dec =C2=A09 13:02 netbsd.4.core<br>ls -l /netbsd<br>-rw-r=
 --r-- =C2=A01 root =C2=A0wheel =C2=A029528376 Dec =C2=A09 12:48 /netbsd<br>=
 <br>I share =E2=80=98dmesg -M netbsd.4.core -N netbsd.4 &gt; dmesg.txt=E2=
 =80=99=C2=A0</div><div>in <a href=3D"https://pastebin.com/raw/jWLjzQbw";>htt=
 ps://pastebin.com/raw/jWLjzQbw</a> . This is all that I got.<br><br>I run =
 =E2=80=98gdb /netbsd --eval-command=3D&quot;target kvm netbsd.4.core&quot;=
 =E2=80=99,</div><div>then your suggested gdb commands,</div><div>=C2=A0I sh=
 are the output in <a href=3D"https://pastebin.com/raw/wQL0uN0z";>https://pas=
 tebin.com/raw/wQL0uN0z</a> .<br><br>The =E2=80=98objdump -dr netbsd.4=E2=80=
 =99 all output:<br>netbsd.4: =C2=A0 =C2=A0 file format elf64-x86-64<br><br>=
 >From =E2=80=98objdump -dr /netbsd=E2=80=99 I share the videoclose part</div=
 ><div> in <a href=3D"https://pastebin.com/raw/aXzSvGC1";>https://pastebin.co=
 m/raw/aXzSvGC1</a> .<br><br><br></div></div>
 
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