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Date: Sun, 15 Feb 2015 07:20:24 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Will Deacon <will.deacon@....com>
Cc: LKP <lkp@...org>, iommu@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [iommu] WARNING: CPU: 0 PID: 1 at drivers/iommu/io-pgtable-arm.c:406
__arm_lpae_unmap()
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git revert-d347efeb16d3d5150cb7f8d50b05f388b572840e-fe4b991dcd84e0104cf2e29223a819335ed048a7
commit fe4b991dcd84e0104cf2e29223a819335ed048a7
Author: Will Deacon <will.deacon@....com>
AuthorDate: Mon Nov 17 23:31:12 2014 +0000
Commit: Will Deacon <will.deacon@....com>
CommitDate: Mon Jan 19 14:46:44 2015 +0000
iommu: add self-consistency tests to ARM LPAE IO page table allocator
This patch adds a series of basic self-consistency tests to the ARM LPAE
IO page table allocator that exercise corner cases in map/unmap, as well
as testing all valid configurations of pagesize, ias and stage.
Signed-off-by: Will Deacon <will.deacon@....com>
===================================================
PARENT COMMIT NOT CLEAN. LOOK OUT FOR WRONG BISECT!
===================================================
Attached dmesg for the parent commit, too, to help confirm whether it is a noise error.
+--------------------------------------------------------------------+------------+------------+------------+
| | e1d3c0fd70 | fe4b991dcd | 5df9cec997 |
+--------------------------------------------------------------------+------------+------------+------------+
| boot_successes | 0 | 0 | 0 |
| boot_failures | 80 | 20 | 12 |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 31 | 1 | |
| backtrace:async_run_entry_fn | 7 | | |
| backtrace:serio_handle_event | 23 | 1 | |
| backtrace:do_fork | 1 | | |
| backtrace:kthreadd | 1 | | |
| WARNING:at_net/netlink/genetlink.c:#genl_unbind() | 49 | 19 | |
| backtrace:do_group_exit | 49 | 19 | |
| backtrace:SyS_exit_group | 49 | 19 | |
| backtrace:SYSC_socketcall | 19 | 9 | |
| backtrace:SyS_socketcall | 19 | 9 | |
| WARNING:at_drivers/iommu/io-pgtable-arm.c:#__arm_lpae_unmap() | 0 | 20 | 12 |
| WARNING:at_drivers/iommu/io-pgtable-arm.c:#arm_lpae_do_selftests() | 0 | 20 | 12 |
| backtrace:arm_lpae_do_selftests | 0 | 20 | 12 |
| backtrace:kernel_init_freeable | 0 | 20 | 12 |
+--------------------------------------------------------------------+------------+------------+------------+
[ 1.206747] arm-lpae io-pgtable: selftest: pgsize_bitmap 0x40201000, IAS 36
[ 1.208654] arm-lpae io-pgtable: selftest: pgsize_bitmap 0x40201000, IAS 40
[ 1.210010] ------------[ cut here ]------------
[ 1.213340] WARNING: CPU: 0 PID: 1 at drivers/iommu/io-pgtable-arm.c:406 __arm_lpae_unmap+0xa8/0x321()
[ 1.216671] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-rc4-00003-gfe4b991 #13
[ 1.220002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 1.222875] 00000000 00000000 d3485e08 c1531d71 00000000 d3485e24 c1039f0d 00000196
[ 1.227986] c12e00db d3541ab0 00000000 00000000 d3485e34 c1039faa 00000009 00000000
[ 1.231315] d3485e90 c12e00db 00000080 80000000 d3485ed0 0000000c d3603000 00600000
[ 1.234642] Call Trace:
[ 1.236674] [<c1531d71>] dump_stack+0x48/0x60
[ 1.240005] [<c1039f0d>] warn_slowpath_common+0x7a/0x91
[ 1.241548] [<c12e00db>] ? __arm_lpae_unmap+0xa8/0x321
[ 1.243098] [<c1039faa>] warn_slowpath_null+0xf/0x13
[ 1.243337] [<c12e00db>] __arm_lpae_unmap+0xa8/0x321
[ 1.244832] [<c12dfe9f>] ? arm_lpae_map+0xa4/0xaf
[ 1.246670] [<c12e036f>] arm_lpae_unmap+0x1b/0x35
[ 1.250004] [<c18b8c71>] arm_lpae_do_selftests+0x1e0/0x394
[ 1.253337] [<c18b8a91>] ? arm_lpae_dump_ops+0x37/0x37
[ 1.254867] [<c1893c4f>] do_one_initcall+0x177/0x18a
[ 1.256343] [<c1893505>] ? repair_env_string+0x12/0x54
[ 1.256670] [<c1893400>] ? do_early_param+0x1e/0x73
[ 1.258145] [<c104b78c>] ? parse_args+0x28b/0x38c
[ 1.260004] [<c18934f3>] ? initcall_blacklist+0x9e/0x9e
[ 1.261530] [<c105dd11>] ? __wake_up+0x32/0x3b
[ 1.263337] [<c1893dc6>] kernel_init_freeable+0x164/0x1e1
[ 1.266670] [<c1893dc6>] ? kernel_init_freeable+0x164/0x1e1
[ 1.270003] [<c152eae3>] kernel_init+0x8/0xb8
[ 1.271405] [<c15375c1>] ret_from_kernel_thread+0x21/0x30
[ 1.272983] [<c152eadb>] ? rest_init+0x6d/0x6d
[ 1.273345] ---[ end trace f84d29e8c6948694 ]---
[ 1.274808] ------------[ cut here ]------------
git bisect start 5df9cec997d8ec7a9906587401d1cdc6548511d6 bfa76d49576599a4b9f9b7a71f23d73d6dcff735 --
git bisect bad 77246d1c9e1faeb5772f5361d2d7ba8901f80916 # 05:42 0- 1 Merge 'kees/aslr/stack' into devel-roam-rand-201502150502
git bisect good 1261c83ef4f1fc6aa4589dac9dc8ee050b54e0c8 # 05:46 20+ 11 0day base guard for 'devel-roam-rand-201502150502'
git bisect good b5596c896580a30afb55d9b449d5c434f2bad9b5 # 05:49 20+ 0 Merge 'renesas/devel' into devel-roam-rand-201502150502
git bisect good c5ce28df0e7c01a1de23c36ebdefcd803f2b6cbb # 05:52 20+ 12 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
git bisect good aa7ed01f93ff7e149cad46f13f66b269d59c9bc0 # 05:54 20+ 1 Merge tag 'mmc-v3.20-1' of git://git.linaro.org/people/ulf.hansson/mmc
git bisect good 12df4289ee8e4dccf932b7186b391bb6d2b915fa # 05:57 20+ 20 Merge tag 'ktest-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest
git bisect bad 802ea9d8645d33d24b7b4cd4537c14f3e698bde0 # 06:00 0- 20 Merge tag 'dm-3.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
git bisect bad a26be149facb22d30cd92cadb26f651d6fe802c9 # 06:03 0- 20 Merge tag 'iommu-updates-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
git bisect good 42cf0f203e877cc7e502883d43b3f72149033d86 # 06:06 20+ 6 Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
git bisect bad a20cc76b9efae10c20123049df361adcd7f0e0b3 # 06:08 0- 7 Merge branches 'arm/renesas', 'arm/smmu', 'arm/omap', 'ppc/pamu', 'x86/amd' and 'core' into next
git bisect bad bb590c9011a7c4e195af486438ead666023f96bd # 06:11 0- 12 iommu/ipmmu-vmsa: Fix IOMMU lookup when multiple IOMMUs are registered
git bisect bad 16753322983bcca0eca6d81f20d23277df0d6cf7 # 06:14 0- 20 Merge branch 'for-joerg/arm-smmu/updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu
git bisect bad c896c132b01895fd1445d178e36155b671c6f9ee # 06:16 0- 18 iommu: io-pgtable-arm: add non-secure quirk
git bisect good e1d3c0fd701df831169b116cd5c5d6203ac07f70 # 06:25 20+ 20 iommu: add ARM LPAE page table allocator
git bisect bad fe4b991dcd84e0104cf2e29223a819335ed048a7 # 06:27 0- 1 iommu: add self-consistency tests to ARM LPAE IO page table allocator
# first bad commit: [fe4b991dcd84e0104cf2e29223a819335ed048a7] iommu: add self-consistency tests to ARM LPAE IO page table allocator
git bisect good e1d3c0fd701df831169b116cd5c5d6203ac07f70 # 06:31 60+ 80 iommu: add ARM LPAE page table allocator
# extra tests with DEBUG_INFO
git bisect good fe4b991dcd84e0104cf2e29223a819335ed048a7 # 06:37 60+ 60 iommu: add self-consistency tests to ARM LPAE IO page table allocator
# extra tests on HEAD of linux-devel/devel-roam-rand-201502150502
git bisect bad 5df9cec997d8ec7a9906587401d1cdc6548511d6 # 06:37 0- 12 0day head guard for 'devel-roam-rand-201502150502'
# extra tests on tree/branch linus/master
git bisect bad d347efeb16d3d5150cb7f8d50b05f388b572840e # 06:37 0- 2 mutex: remove unused field "name" in debug mode
# extra tests with first bad commit reverted
# extra tests on tree/branch linus/master
git bisect bad d347efeb16d3d5150cb7f8d50b05f388b572840e # 06:40 0- 2 mutex: remove unused field "name" in debug mode
# extra tests on tree/branch next/master
git bisect bad b8acf73194186a5cba86812eb4ba17b897f0e13e # 06:44 0- 20 Add linux-next specific files for 20150213
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=yocto-minimal-i386.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-initrd $initrd
-m 320
-smp 1
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
rd.udev.log-priority=err
systemd.log_target=journal
systemd.log_level=warning
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-yocto-client1-20:20150215062606:i386-randconfig-r2-0215:3.19.0-rc4-00003-gfe4b991:13" of type "text/plain" (359863 bytes)
View attachment "dmesg-quantal-client6-18:20150215062334:i386-randconfig-r2-0215:3.19.0-rc4-00002-ge1d3c0f:526" of type "text/plain" (59731 bytes)
View attachment "config-3.19.0-rc4-00003-gfe4b991" of type "text/plain" (75537 bytes)
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