NetBSD Problem Report #59465

From www@netbsd.org  Fri Jun 13 03:06:32 2025
Return-Path: <www@netbsd.org>
Received: from mail.netbsd.org (mail.netbsd.org [199.233.217.200])
	(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
	 key-exchange X25519 server-signature RSA-PSS (2048 bits)
	 client-signature RSA-PSS (2048 bits))
	(Client CN "mail.NetBSD.org", Issuer "mail.NetBSD.org CA" (not verified))
	by mollari.NetBSD.org (Postfix) with ESMTPS id 93E8D1A923C
	for <gnats-bugs@gnats.NetBSD.org>; Fri, 13 Jun 2025 03:06:32 +0000 (UTC)
Message-Id: <20250613030630.CE12C1A923E@mollari.NetBSD.org>
Date: Fri, 13 Jun 2025 03:06:30 +0000 (UTC)
From: david@gutteridge.ca
Reply-To: david@gutteridge.ca
To: gnats-bugs@NetBSD.org
Subject: Recurring kernel panic with -current (10.99.14): "heart stopped beating"
X-Send-Pr-Version: www-1.0

>Number:         59465
>Category:       kern
>Synopsis:       Recurring kernel panic with -current (10.99.14): "heart stopped beating"
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jun 13 03:10:00 +0000 2025
>Closed-Date:    Sat Sep 06 18:51:30 +0000 2025
>Last-Modified:  Sat Sep 06 18:51:30 +0000 2025
>Originator:     David H. Gutteridge
>Release:        current (10.99.14 from early June)
>Organization:
My Computer Ate My Work LLC
>Environment:
NetBSD arcusxx.nonus-porta.net 10.99.14 NetBSD 10.99.14 (GENERIC) #0: Tue Jun  3 20:25:27 UTC 2025  mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
I am encountering reproducible "heart stopped beating" panics. These
seem to occur when particular X11 activities are in progress. For
example, if I start xscreensaver-demo and start asking for samples of
OpenGL screensavers, that tends to kill it. But it has also crashed
with simpler activities (from a graphical perspective, perhaps), like
an Xfce session starting up.

Crash version 10.99.14, image version 10.99.14.
crash: _kvm_kvatop(0)
Kernel compiled without options LOCKDEBUG.
System panicked: cpu2[97 softclk/2]: heart stopped beating
Backtrace from time of crash is available.
crash> bt
sljit_modcmd() at 0
kern_reboot() at kern_reboot+0x93
vpanic() at vpanic+0x17b
panic() at printf_nostamp
defibrillator() at defibrillator+0x6b
ipi_msg_cpu_handler() at ipi_msg_cpu_handler+0x68
ipi_cpu_handler() at ipi_cpu_handler+0xa2
x86_ipi_handler() at x86_ipi_handler+0x71
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x18
--- interrupt ---
mutex_spin_enter() at mutex_spin_exit
callout_softclock() at callout_softclock+0xd9
softint_dispatch() at softint_dispatch+0x112
crash> ps | grep '>' | grep -v idle/
18728>18728 7   2   8020000   ffff99500a932000                  X
1272 > 1272 7   1   8020100   ffff994fb93dbc00               cron
0    >  408 7   0       200   ffff994fb8855000            ioflush
0    >   97 7   2       200   ffff994fb72da800          softclk/2

crash> show proc /a ffff99500a932000
lwp_t ffff99500a932000
X: pid 18728 proc ffff99500887a0c0 vmspace/map ffff99500159a040 flags 4300
> lwp 18728 ffff99500a932000 pcb ffffdc894b3ea000
    stat 7 flags 8020000 cpu 2 pri 43 ref 0
crash> show proc /a ffff994fb72da800
lwp_t ffff994fb72da800
system: pid 0 proc ffffffff8188c780 vmspace/map ffffffff819769e0 flags 20002
> lwp 97 [softclk/2] ffff994fb72da800 pcb ffffdc8938861000
    stat 7 flags 200 cpu 2 pri 220 ref 0
  lwp 96 [softbio/2] ffff994fb72da400 pcb ffffdc893885a000
    stat 1 flags 200 cpu 2 pri 221 ref 0
  lwp 30 [softnet/2] ffff994fb72da000 pcb ffffdc8938853000
    stat 1 flags 200 cpu 2 pri 222 ref 0
  lwp 29 [idle/2] ffff994fb725dc00 pcb ffffdc8938844000
    stat 1 flags 201 cpu 2 pri 0 ref 0
  lwp 28 [xcall/1] ffff994fb725d800 pcb ffffdc8938834000
    stat 3 flags 200 cpu 1 pri 127 ref 0
    wmesg xcall wchan ffffdc8937e78010
  lwp 27 [softser/1] ffff994fb725d400 pcb ffffdc893882d000
    stat 1 flags 200 cpu 1 pri 223 ref 0
  lwp 26 [softclk/1] ffff994fb725d000 pcb ffffdc8938826000
    stat 1 flags 200 cpu 1 pri 220 ref 0
  lwp 25 [softbio/1] ffff99568d749c00 pcb ffffdc893881f000
    stat 1 flags 200 cpu 1 pri 221 ref 0
  lwp 24 [softnet/1] ffff99568d749800 pcb ffffdc8938818000
    stat 1 flags 200 cpu 1 pri 222 ref 0
  lwp 23 [idle/1] ffff99568d749400 pcb ffffdc89387e8000
    stat 1 flags 201 cpu 1 pri 0 ref 0
  lwp 22 [lnxsyswq] ffff99568d749000 pcb ffffdc8938796000
    stat 3 flags 200 cpu 1 pri 43 ref 0
    wmesg lnxsyswq wchan ffff995692871e08
  lwp 21 [lnxubdwq] ffff99568d75fc00 pcb ffffdc893878f000
    stat 3 flags 200 cpu 3 pri 43 ref 0
    wmesg lnxubdwq wchan ffff995692871d08
  lwp 20 [lnxpwrwq] ffff99568d75f800 pcb ffffdc8938788000
    stat 3 flags 200 cpu 4 pri 43 ref 0
    wmesg lnxpwrwq wchan ffff995692871c08
  lwp 19 [lnxlngwq] ffff99568d75f400 pcb ffffdc8938781000
    stat 3 flags 200 cpu 4 pri 43 ref 0
    wmesg lnxlngwq wchan ffff995692871b08
  lwp 18 [lnxhipwq] ffff99568d75f000 pcb ffffdc893877a000
    stat 3 flags 200 cpu 3 pri 43 ref 0
    wmesg lnxhipwq wchan ffff995692871a08
  lwp 17 [lnxrcugc] ffff99568d77bc00 pcb ffffdc8938773000
    stat 3 flags 240 cpu 1 pri 43 ref 0
    wmesg lnxrcugc wchan ffffffff818b3208
  lwp 16 [sysmon] ffff99568d77b800 pcb ffffdc893876c000
    stat 3 flags 200 cpu 3 pri 96 ref 0
    wmesg smtaskq wchan ffffffff818fab00
  lwp 15 [pmfsuspend] ffff99568d77b400 pcb ffffdc8938765000
    stat 3 flags 200 cpu 4 pri 43 ref 0
    wmesg pmfsuspend wchan ffff9956918266c8
  lwp 14 [pmfevent] ffff99568d77b000 pcb ffffdc893875e000
    stat 3 flags 200 cpu 0 pri 43 ref 0
    wmesg pmfevent wchan ffff995691826588
  lwp 13 [sopendfree] ffff99568e7a3c00 pcb ffffdc8938757000
    stat 3 flags 200 cpu 0 pri 96 ref 0
    wmesg sopendfr wchan ffffffff81982ab0
  lwp 12 [ifwdog] ffff99568e7a3800 pcb ffffdc8938750000
    stat 3 flags 200 cpu 2 pri 222 ref 0
    wmesg ifwdog wchan ffff995691826448
  lwp 11 [iflnkst] ffff99568e7a3400 pcb ffffdc8938749000
    stat 3 flags 200 cpu 3 pri 222 ref 0
    wmesg iflnkst wchan ffff995691826308
  lwp 10 [nfssilly] ffff99568e7a3000 pcb ffffdc8938742000
    stat 3 flags 200 cpu 0 pri 43 ref 0
    wmesg nfssilly wchan ffff9956918261c8
  lwp 9 [pooldisp] ffff9956917d7c00 pcb ffffdc893873b000
    stat 3 flags 200 cpu 0 pri 43 ref 0
    wmesg pooldisp wchan ffff995692871728
  lwp 8 [modunload] ffff9956917d7800 pcb ffffdc8938734000
    stat 3 flags 240 cpu 1 pri 125 ref 0
    wmesg mod_unld wchan ffffffff81975ab0
  lwp 7 [xcall/0] ffff9956917d7400 pcb ffffdc893872d000
    stat 3 flags 200 cpu 0 pri 127 ref 0
    wmesg xcall wchan ffffffff8183ce50
  lwp 6 [softser/0] ffff9956917d7000 pcb ffffdc8938726000
    stat 1 flags 200 cpu 0 pri 223 ref 0
  lwp 5 [softclk/0] ffff995691811c00 pcb ffffdc893871f000
    stat 1 flags 200 cpu 0 pri 220 ref 0
  lwp 4 [softbio/0] ffff995691811800 pcb ffffdc8938718000
    stat 1 flags 200 cpu 0 pri 221 ref 0
  lwp 3 [softnet/0] ffff995691811400 pcb ffffdc89382c9000
    stat 1 flags 200 cpu 0 pri 222 ref 0
  lwp 2 [idle/0] ffff995691811000 pcb ffffdc89382c2000
    stat 1 flags 201 cpu 0 pri 0 ref 0
  lwp 0 [swapper] ffffffff8188c000 pcb ffffffff81d56000
    stat 3 flags 200 cpu 3 pri 125 ref 0
    wmesg uvm wchan ffffffff8188c000

>How-To-Repeat:
As above.
>Fix:
Unknown.

>Release-Note:

>Audit-Trail:
From: "David H. Gutteridge" <david@gutteridge.ca>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: kern/59465: Recurring kernel panic with -current (10.99.14):
 "heart stopped beating"
Date: Thu, 19 Jun 2025 21:47:43 -0400

 I guess it goes without saying I could test with heartbeat disabled,
 which I'll do, but haven't got to get, as I've been running it further
 with it enabled. I don't have anything very specific to say except that
 it's evident that this only happens when X is running. I can run this
 machine without X for days and beat on it with all CPUs active building
 things, no issue. It can sit idle for half a day, start X and it almost
 immediately panics. (This is a Skylake CPU, BTW, which I understand has
 known architectural issues.)

 Dave

 PS since heartbeat is enabled by default, we should probably install the
 heartbeat(9) man page. I can take care of that, if it helps.

From: "David H. Gutteridge" <david@gutteridge.ca>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: kern/59465: Recurring kernel panic with -current (10.99.14):
 "heart stopped beating"
Date: Fri, 29 Aug 2025 20:35:29 -0400

 I suspect this is actually a duplicate of PR kern/59339. I applied the
 last version of the patches there, and I haven't been able to reproduce
 the issue with those patches in place.

 Dave

State-Changed-From-To: open->closed
State-Changed-By: gutteridge@NetBSD.org
State-Changed-When: Sat, 06 Sep 2025 18:51:30 +0000
State-Changed-Why:
Presumed duplicate of PR kern/59339.

>Unformatted:

Home	PR Database Search