linux-kernel - [BUG v6.3-rc4+] WARNING: CPU: 0 PID: 1 at drivers/thermal/thermal_sysfs.c:879 cooling_device_stats

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Date:   Wed, 29 Mar 2023 16:58:19 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Zhang Rui <rui.zhang@...el.com>
Subject: [BUG v6.3-rc4+] WARNING: CPU: 0 PID: 1 at
 drivers/thermal/thermal_sysfs.c:879 cooling_device_stats_setup+0xac/0xc0

In preparation to adding my patch that checks for some kinds of bugs in
trace events, I decided to run it on the Linus's latest branch, to see if
there's any other trace events that may cause issues. But instead I hit
this unrelated bug. Looks to be triggering an added lockdep_assert() on
boot up.

static void cooling_device_stats_setup(struct thermal_cooling_device *cdev)
{
        const struct attribute_group *stats_attr_group = NULL;
        struct cooling_dev_stats *stats;
        /* Total number of states is highest state + 1 */
        unsigned long states = cdev->max_state + 1;
        int var;

        lockdep_assert_held(&cdev->lock); <<<---- line 879


[   12.379345] ------------[ cut here ]------------
[   12.380501] WARNING: CPU: 0 PID: 1 at drivers/thermal/thermal_sysfs.c:879 cooling_device_stats_setup+0xac/0xc0
[   12.382844] Modules linked in:
[   12.383657] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.3.0-rc4-test-00040-g077623e2804f-dirty #12
[   12.385753] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-debian-1.16.0-5 04/01/2014
[   12.387921] RIP: 0010:cooling_device_stats_setup+0xac/0xc0
[   12.389256] Code: ff 48 89 1d 2e 8d 07 01 5b 5d 41 5c c3 cc cc cc cc 48 8d bf 18 05 00 00 be ff ff ff ff e8 dc c1 36 00 85 c0 0f 85 72 ff ff ff <0f> 0b e9 6b ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90
[   12.394812] RSP: 0000:ffffa4d580013c60 EFLAGS: 00010246
[   12.396076] RAX: 0000000000000000 RBX: ffff99cc82e4e000 RCX: 0000000000000001
[   12.397747] RDX: 0000000000000000 RSI: ffffffff9b2e7401 RDI: ffffffff9b316e4c
[   12.399398] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
[   12.401057] R10: ffff99cc80262340 R11: ffff99cc80263138 R12: ffff99cc82e4e000
[   12.402698] R13: ffff99cc82e4e018 R14: ffff99cc80bc7800 R15: 0000000000000000
[   12.404337] FS:  0000000000000000(0000) GS:ffff99ccfbc00000(0000) knlGS:0000000000000000
[   12.406266] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   12.407632] CR2: ffff99ccb7401000 CR3: 0000000134a64001 CR4: 0000000000170ef0
[   12.409313] Call Trace:
[   12.410001]  <TASK>
[   12.410618]  thermal_cooling_device_setup_sysfs+0x12/0x30
[   12.411910]  __thermal_cooling_device_register.part.0+0x13c/0x3d0
[   12.413372]  acpi_processor_thermal_init+0x26/0x100
[   12.414557]  __acpi_processor_start+0x7f/0xf0
[   12.415628]  acpi_processor_start+0x30/0x50
[   12.416684]  really_probe+0x1a2/0x400
[   12.417635]  ? __pfx___driver_attach+0x10/0x10
[   12.418726]  __driver_probe_device+0x78/0x170
[   12.419800]  driver_probe_device+0x1f/0x90
[   12.423242]  __driver_attach+0xd6/0x1d0
[   12.424220]  bus_for_each_dev+0x8f/0xe0
[   12.425210]  bus_add_driver+0x119/0x220
[   12.426174]  driver_register+0x59/0x100
[   12.427139]  ? __pfx_acpi_processor_driver_init+0x10/0x10
[   12.428427]  acpi_processor_driver_init+0x3f/0xc0
[   12.429582]  ? __pfx_acpi_processor_driver_init+0x10/0x10
[   12.430865]  do_one_initcall+0x74/0x290
[   12.431839]  kernel_init_freeable+0x3cc/0x580
[   12.432938]  ? __pfx_kernel_init+0x10/0x10
[   12.433957]  kernel_init+0x1a/0x1c0
[   12.434847]  ret_from_fork+0x2c/0x50
[   12.435772]  </TASK>
[   12.436402] irq event stamp: 10911001
[   12.437356] hardirqs last  enabled at (10911013): [<ffffffff99e6513e>] __up_console_sem+0x5e/0x70
[   12.439440] hardirqs last disabled at (10911022): [<ffffffff99e65123>] __up_console_sem+0x43/0x70
[   12.441531] softirqs last  enabled at (10910744): [<ffffffff9abd17a2>] __do_softirq+0x322/0x429
[   12.443577] softirqs last disabled at (10910739): [<ffffffff99dc27e7>] __irq_exit_rcu+0xc7/0x150
[   12.445651] ---[ end trace 0000000000000000 ]---
[   12.446965] ------------[ cut here ]------------

Config attached.

-- Steve

Download attachment "config" of type "application/octet-stream" (158964 bytes)