linux-kernel - new dmesg warning in 4.1.3: WARNING: CPU: 1 PID: 1 at arch/x86/mm/ioremap.c:202 __ioremap

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Date:	Mon, 27 Jul 2015 14:09:54 +0200
From:	Toralf Förster <toralf.foerster@....de>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: new dmesg warning in 4.1.3: WARNING: CPU: 1 PID: 1 at
 arch/x86/mm/ioremap.c:202 __ioremap_caller+0x26f/0x3b0()

At a Gentoo Linux hardened amd64 desktop I got this trace after upgrading from 4.0.8 :


Jul 27 14:01:13 t44 kernel: [    0.344444] ------------[ cut here ]------------
Jul 27 14:01:13 t44 kernel: [    0.344453] WARNING: CPU: 1 PID: 1 at arch/x86/mm/ioremap.c:202 __ioremap_caller+0x26f/0x3b0()
Jul 27 14:01:13 t44 kernel: [    0.344459] Info: mapping multiple BARs. Your kernel is fine.
Jul 27 14:01:13 t44 kernel: [    0.344462] Modules linked in:
Jul 27 14:01:13 t44 kernel: [    0.344470] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.1.3-hardened #1
Jul 27 14:01:13 t44 kernel: [    0.344475] Hardware name: LENOVO 20AQCTO1WW/20AQCTO1WW, BIOS GJET83WW (2.33 ) 03/09/2015
Jul 27 14:01:13 t44 kernel: [    0.344481]  ffffffff810e2c33 0000000000000000 ffffffff817b4418 ffffc9000001bae8
Jul 27 14:01:13 t44 kernel: [    0.344490]  ffffffff815b239d 0000000000002b2b ffffc9000001bb38 ffffc9000001bb28
Jul 27 14:01:13 t44 kernel: [    0.344498]  ffffffff8105e097 ffffc9000001bb68 ffffffff817b4418 00000000000000ca
Jul 27 14:01:13 t44 kernel: [    0.344506] Call Trace:
Jul 27 14:01:13 t44 kernel: [    0.344515]  [<ffffffff810e2c33>] ? print_modules+0x73/0xd0
Jul 27 14:01:13 t44 kernel: [    0.344523]  [<ffffffff815b239d>] dump_stack+0x45/0x5d
Jul 27 14:01:13 t44 kernel: [    0.344530]  [<ffffffff8105e097>] warn_slowpath_common+0x87/0xd0
Jul 27 14:01:13 t44 kernel: [    0.344536]  [<ffffffff8105e13a>] warn_slowpath_fmt+0x5a/0x70
Jul 27 14:01:13 t44 kernel: [    0.344543]  [<ffffffff8104a3ef>] __ioremap_caller+0x26f/0x3b0
Jul 27 14:01:13 t44 kernel: [    0.344550]  [<ffffffff8102ae46>] ? snb_uncore_imc_init_box+0x66/0xa0
Jul 27 14:01:13 t44 kernel: [    0.344556]  [<ffffffff8104a556>] ioremap_nocache+0x26/0x40
Jul 27 14:01:13 t44 kernel: [    0.344562]  [<ffffffff8102ae46>] snb_uncore_imc_init_box+0x66/0xa0
Jul 27 14:01:13 t44 kernel: [    0.344568]  [<ffffffff8102903c>] uncore_pci_probe+0xdc/0x1f0
Jul 27 14:01:13 t44 kernel: [    0.344576]  [<ffffffff81386ce8>] pci_device_probe+0xa8/0x110
Jul 27 14:01:13 t44 kernel: [    0.344582]  [<ffffffff8141bd36>] driver_probe_device+0x176/0x2f0
Jul 27 14:01:13 t44 kernel: [    0.344587]  [<ffffffff8141bf10>] ? __device_attach+0x60/0x60
Jul 27 14:01:13 t44 kernel: [    0.344592]  [<ffffffff8141bfbb>] __driver_attach+0xab/0xb0
Jul 27 14:01:13 t44 kernel: [    0.344597]  [<ffffffff8141bf10>] ? __device_attach+0x60/0x60
Jul 27 14:01:13 t44 kernel: [    0.344602]  [<ffffffff8141bf10>] ? __device_attach+0x60/0x60
Jul 27 14:01:13 t44 kernel: [    0.344609]  [<ffffffff8141999b>] bus_for_each_dev+0x7b/0xc0
Jul 27 14:01:13 t44 kernel: [    0.344614]  [<ffffffff8141b6c6>] driver_attach+0x26/0x40
Jul 27 14:01:13 t44 kernel: [    0.344619]  [<ffffffff8141b308>] bus_add_driver+0x178/0x220
Jul 27 14:01:13 t44 kernel: [    0.344632]  [<ffffffff8141c830>] driver_register+0x60/0xe0
Jul 27 14:01:13 t44 kernel: [    0.344641]  [<ffffffff813852ee>] __pci_register_driver+0x6e/0x80
Jul 27 14:01:13 t44 kernel: [    0.344647]  [<ffffffff81c2355e>] ? uncore_cpu_setup+0x33/0x33
Jul 27 14:01:13 t44 kernel: [    0.344652]  [<ffffffff81c236a1>] intel_uncore_init+0x143/0x4b4
Jul 27 14:01:13 t44 kernel: [    0.344657]  [<ffffffff81c2355e>] ? uncore_cpu_setup+0x33/0x33
Jul 27 14:01:13 t44 kernel: [    0.344664]  [<ffffffff810003a4>] do_one_initcall+0x94/0x1a0
Jul 27 14:01:13 t44 kernel: [    0.344671]  [<ffffffff81c15c7d>] kernel_init_freeable+0x1c6/0x2be
Jul 27 14:01:13 t44 kernel: [    0.344676]  [<ffffffff81c14eb2>] ? initcall_blacklist+0x148/0x148
Jul 27 14:01:13 t44 kernel: [    0.344683]  [<ffffffff815a8940>] ? rest_init+0x80/0x80
Jul 27 14:01:13 t44 kernel: [    0.344689]  [<ffffffff815a894e>] kernel_init+0xe/0x100
Jul 27 14:01:13 t44 kernel: [    0.344696]  [<ffffffff815b9cbe>] ret_from_fork+0x3e/0x70
Jul 27 14:01:13 t44 kernel: [    0.344701]  [<ffffffff815a8940>] ? rest_init+0x80/0x80
Jul 27 14:01:13 t44 kernel: [    0.344709] ---[ end trace 59720842ea32ef0e ]---

Anything to worry about ?


-- 
Toralf, pgp key: 872AE508 0076E94E
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