linux-kernel - [iommu/vt] c9ac3b69cf: WARNING:at_drivers/iommu/intel-iommu.c:#dmar_parse_one

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Message-ID: <20200203091023.GH12867@shao2-debian>
Date:   Mon, 3 Feb 2020 17:10:23 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Barret Rhoden <brho@...gle.com>
Cc:     0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
        lkp@...ts.01.org
Subject: [iommu/vt] c9ac3b69cf:
 WARNING:at_drivers/iommu/intel-iommu.c:#dmar_parse_one_rmrr

FYI, we noticed the following commit (built with gcc-7):

commit: c9ac3b69cfdbc46a0504fa353b5126827e4b0bdb ("iommu/vt-d: skip RMRR entries that fail the sanity check")
https://github.com/0day-ci/linux/commits/Barret-Rhoden/iommu-vt-d-bad-RMRR-workarounds/20200109-051817

in testcase: kernel_selftests
with following parameters:

	group: kselftests-02
	ucode: 0xd6

test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt


on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 16G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>


kern  :warn  : [    2.958337] WARNING: CPU: 0 PID: 0 at drivers/iommu/intel-iommu.c:4331 dmar_parse_one_rmrr+0xa5/0x12c
kern  :warn  : [    2.969629] Modules linked in:
kern  :warn  : [    2.972830] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc2-00007-gc9ac3b69cfdbc #1
kern  :warn  : [    2.981058] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.2.8 01/26/2016
kern  :warn  : [    2.988673] RIP: 0010:dmar_parse_one_rmrr+0xa5/0x12c
kern  :warn  : [    2.993799] Code: bf 01 00 00 00 48 89 c3 e8 04 c9 b4 fe 48 8b 55 10 48 8b 75 08 4d 89 e1 49 89 d8 48 89 c1 48 c7 c7 e8 b6 39 82 e8 c7 c4 38 fe <0f> 0b 31 d2 eb 7a 48 89 68 10 48 8b 45 08 48 8d 53 30 0f b7 75 02
kern  :warn  : [    3.012920] RSP: 0000:ffffffff82603de0 EFLAGS: 00010286
kern  :warn  : [    3.018310] RAX: 0000000000000000 RBX: ffffffff8340000c RCX: ffffffff82667ac8
kern  :warn  : [    3.025628] RDX: 0000000000000001 RSI: 0000000000000082 RDI: 0000000000000246
kern  :warn  : [    3.032943] RBP: ffffc9000001b3a8 R08: 00000000000000ec R09: 0736073707350739
kern  :warn  : [    3.040259] R10: ffffffff82dee824 R11: 072007200720075b R12: ffffffff820fa3fc
kern  :warn  : [    3.047575] R13: ffffc9000001b3c8 R14: ffffffff82603e38 R15: 0000000000000000
kern  :warn  : [    3.054892] FS:  0000000000000000(0000) GS:ffff888459c00000(0000) knlGS:0000000000000000
kern  :warn  : [    3.063203] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kern  :warn  : [    3.069117] CR2: ffff888459401000 CR3: 000000045860a001 CR4: 00000000000606b0
kern  :warn  : [    3.076431] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kern  :warn  : [    3.083747] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kern  :warn  : [    3.091065] Call Trace:
kern  :warn  : [    3.093654]  dmar_walk_remapping_entries+0xa2/0x1d0
kern  :warn  : [    3.098696]  dmar_table_init+0xe0/0x170
kern  :warn  : [    3.102682]  ? dmar_free_dev_scope+0x70/0x70
kern  :warn  : [    3.107108]  ? init_dmars+0xa04/0xa04
kern  :warn  : [    3.110923]  ? iommu_flush_write_buffer+0x20/0x20
kern  :warn  : [    3.115786]  ? get_order+0x11/0x11
kern  :warn  : [    3.119343]  ? amd_iommu_apply_ivrs_quirks+0x11/0x11
kern  :warn  : [    3.124481]  intel_prepare_irq_remapping+0x3a/0x224
kern  :warn  : [    3.129528]  irq_remapping_prepare+0x1d/0x5f
kern  :warn  : [    3.133965]  enable_IR_x2apic+0x21/0x17e
kern  :warn  : [    3.138045]  default_setup_apic_routing+0x12/0x6f
kern  :warn  : [    3.142918]  apic_intr_mode_init+0x1a1/0x1f1
kern  :warn  : [    3.147350]  x86_late_time_init+0x17/0x1c
kern  :warn  : [    3.151515]  start_kernel+0x457/0x515
kern  :warn  : [    3.155330]  secondary_startup_64+0xb6/0xc0
kern  :warn  : [    3.159670] ---[ end trace ba9f2cc9dcf19f0e ]---


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Rong Chen


View attachment "config-5.5.0-rc2-00007-gc9ac3b69cfdbc" of type "text/plain" (202384 bytes)

View attachment "job-script" of type "text/plain" (7635 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (60156 bytes)

View attachment "kernel_selftests" of type "text/plain" (127315 bytes)

View attachment "job.yaml" of type "text/plain" (6839 bytes)

View attachment "reproduce" of type "text/plain" (345 bytes)