linux-kernel - Re: Linux 6.13-rc6

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Message-ID: <Z3vjjDsjZAfqLI6N@tuxmaker.boeblingen.de.ibm.com>
Date: Mon, 6 Jan 2025 15:07:08 +0100
From: Alexander Gordeev <agordeev@...ux.ibm.com>
To: Borislav Petkov <bp@...en8.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Koichiro Den <koichiro.den@...onical.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>, stable@...r.kernel.org
Subject: Re: Linux 6.13-rc6

On Mon, Jan 06, 2025 at 02:18:17PM +0100, Borislav Petkov wrote:

Hi All,

> Something not well baked managed to sneak in and it is tagged for stable:
> 
> adcfb264c3ed ("vmstat: disable vmstat_work on vmstat_cpu_down_prep()")
> 
> Reverting it fixes the warn splat below.
> 
> [    0.310373] smpboot: x86: Booting SMP configuration:
> [    0.311074] .... node  #0, CPUs:        #1  #2  #3  #4  #5  #6  #7  #8  #9 #10 #11 #12 #13 #14 #15
> [    0.313798] ------------[ cut here ]------------
> [    0.317530] workqueue: work disable count underflowed
> [    0.317530] WARNING: CPU: 1 PID: 21 at kernel/workqueue.c:4317 enable_work+0xa4/0xb0
> [    0.317530] Modules linked in:
> [    0.317530] CPU: 1 UID: 0 PID: 21 Comm: cpuhp/1 Not tainted 6.13.0-rc6 #11
...

JFYI, hitting the same on s390:

[    0.176304] smp: Bringing up secondary CPUs ...
[    0.186596] ------------[ cut here ]------------
[    0.186603] workqueue: work disable count underflowed
[    0.186606] WARNING: CPU: 1 PID: 21 at kernel/workqueue.c:4317 enable_work+0x10a/0x120
[    0.186613] Modules linked in:
[    0.186615] CPU: 1 UID: 0 PID: 21 Comm: cpuhp/1 Not tainted 6.13.0-rc6 #206
[    0.186619] Hardware name: IBM 3931 A01 701 (KVM/Linux)
[    0.186621] Krnl PSW : 0404c00180000000 00000308470979ee (enable_work+0x10e/0x120)
[    0.186626]            R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3
[    0.186629] Krnl GPRS: 00000308484bf9b8 00000308484bf9b0 0000000000000029 00000308484bf9b8
[    0.186632]            000002884717ba08 000002884717ba00 000003084726e5e0 000000000073e180
[    0.186634]            000000007fffffff 0000000000000000 0000000000000000 000000007af24840
[    0.186637]            0000000000e3a300 0000000000e3a300 00000308470979ea 000002884717bc60
[    0.186685] Krnl Code: 00000308470979de: c02000846cd0	larl	%r2,000003084812537e
[    0.186685]            00000308470979e4: c0e5fffee146	brasl	%r14,0000030847073c70
[    0.186685]           #00000308470979ea: af000000		mc	0,0
[    0.186685]           >00000308470979ee: a7080000		lhi	%r0,0
[    0.186685]            00000308470979f2: a7f4ffb2		brc	15,0000030847097956
[    0.186685]            00000308470979f6: 0707		bcr	0,%r7
[    0.186685]            00000308470979f8: 0707		bcr	0,%r7
[    0.186685]            00000308470979fa: 0707		bcr	0,%r7
[    0.186708] Call Trace:
[    0.186710]  [<00000308470979ee>] enable_work+0x10e/0x120
[    0.186714] ([<00000308470979ea>] enable_work+0x10a/0x120)
[    0.186718]  [<000003084726e64c>] vmstat_cpu_online+0x6c/0x90
[    0.186722]  [<0000030847075d9a>] cpuhp_invoke_callback+0x16a/0x4d0
[    0.186725]  [<0000030847076832>] cpuhp_thread_fun+0xc2/0x250
[    0.186728]  [<00000308470a8424>] smpboot_thread_fn+0xe4/0x1b0
[    0.186731]  [<00000308470a0d46>] kthread+0x126/0x130
[    0.186735]  [<000003084702508c>] __ret_from_fork+0x3c/0x60
[    0.186738]  [<0000030847d3a582>] ret_from_fork+0xa/0x38
[    0.186742] Last Breaking-Event-Address:
[    0.186743]  [<0000030847073d62>] __warn_printk+0xf2/0x100
[    0.186746] Kernel panic - not syncing: kernel: panic_on_warn set ...
[    0.186749] CPU: 1 UID: 0 PID: 21 Comm: cpuhp/1 Not tainted 6.13.0-rc6 #206

Thanks!