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Message-ID: <1A0DD183DC70594BB38A8EE30A5837790E8EBDC9@SHSMSX101.ccr.corp.intel.com>
Date: Thu, 17 Jul 2014 07:37:58 +0000
From: "Su, Tao" <tao.su@...el.com>
To: "'luto@...capital.net'" <luto@...capital.net>
CC: "Chen, Jet" <jet.chen@...el.com>, "Su, Tao" <tao.su@...el.com>,
"Liu, Yuanhan" <yuanhan.liu@...el.com>,
"'lkp@...org'" <lkp@...org>,
"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>
Subject: [ 0.000000] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
git://internal_merge_and_test_tree devel-athens-mips-201407170120 commit d07c7f1ed61789e175fa975134855be32263be2c
Author: Andy Lutomirski <luto@...capital.net>
AuthorDate: Tue Jul 15 18:34:20 2014 -0700
Commit: Andy Lutomirski <luto@...capital.net>
CommitDate: Wed Jul 16 10:01:27 2014 -0700
x86,kaslr: Use MSR_KVM_GET_RNG_SEED for KASLR if available
It's considerably better than any of the alternatives on KVM.
Rather than reinventing all of the cpu feature query code, this fixes
native_cpuid to work in PIC objects.
I haven't combined it with boot/cpuflags.c's cpuid implementation:
including asm/processor.h from boot/cpuflags.c results in a flood of
unrelated errors, and fixing it might be messy.
Signed-off-by: Andy Lutomirski <luto@...capital.net>
+------------------------------------------+------------+------------+------------------+
| | c6f07a6360 | d07c7f1ed6 |
| v3.16-rc5_071701 |
+------------------------------------------+------------+------------+------------------+
| boot_successes | 705 | 124 | 17 |
| boot_failures | 0 | 111 | 4 |
| general_protection_fault | 0 | 111 | 4 |
| RIP:setup_init_fpu_buf | 0 | 111 | 4 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 111 | 4 |
| backtrace:setup_init_fpu_buf | 0 | 111 | 4 |
| backtrace:xstate_enable_boot_cpu | 0 | 111 | 4 |
| backtrace:xsave_init | 0 | 111 | 4 |
| backtrace:fpu_init | 0 | 111 | 4 |
| backtrace:cpu_init | 0 | 111 | 4 |
| backtrace:trap_init | 0 | 111 | 4 |
+------------------------------------------+------------+------------+------------------+
[ 0.000000] Policy zone: DMA32
[ 0.000000] Kernel command line: hung_task_panic=1 earlyprintk=ttyS0,115200 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=10 softlockup_panic=1 nmi_watchdog=panic prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw link=/kbuild-tests/run-queue/kvm/x86_64-randconfig-s0-07170233/linux-devel:devel-hourly-2014071701:d07c7f1ed61789e175fa975134855be32263be2c:bisect-linux0/.vmlinuz-d07c7f1ed61789e175fa975134855be32263be2c-20140717182236-14-kbuild branch=linux-devel/devel-hourly-2014071701 BOOT_IMAGE=/kernel/x86_64-randconfig-s0-07170233/d07c7f1ed61789e175fa975134855be32263be2c/vmlinuz-3.16.0-rc5-00004-gd07c7f1 drbd.minor_count=8
[ 0.000000] PID hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.000000] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.16.0-rc5-00004-gd07c7f1 #1
[ 0.000000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 0.000000] task: ffffffff81c10490 ti: ffffffff81c00000 task.ti: ffffffff81c00000
[ 0.000000] RIP: 0010:[<ffffffff81e9757c>] [<ffffffff81e9757c>] setup_init_fpu_buf+0x104/0x122
[ 0.000000] RSP: 0000:ffffffff81c03e30 EFLAGS: 00010086
[ 0.000000] RAX: 00000000ffffffff RBX: 0000000000000003 RCX: 0000000000000000
[ 0.000000] RDX: 00000000ffffffff RSI: ffffffff81c03e34 RDI: ffff880013ff9000
[ 0.000000] RBP: ffffffff81c03e68 R08: 0000000000000040 R09: ffffffff81c03e38
[ 0.000000] R10: ffffffff81c03e3c R11: 0000000000000040 R12: ffffffff81c03e3c
[ 0.000000] R13: ffffffff81c03e38 R14: ffffffff81c03e34 R15: ffffffff81c03e30
[ 0.000000] FS: 0000000000000000(0000) GS:ffff880011000000(0000) knlGS:0000000000000000
[ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.000000] CR2: ffff8800127ff000 CR3: 0000000001c0b000 CR4: 00000000000406a0
[ 0.000000] Stack:
[ 0.000000] 0000000000000000 0000000000000000 ffffffff81c03e80 ffffffff81c03e84
[ 0.000000] ffffffff81c03e7c ffffffff81c03e78 0000000000000000 ffffffff81c03ea8
[ 0.000000] ffffffff81e97711 0000000000000007 0000034000000340 0000000000000008
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff81e97711>] xstate_enable_boot_cpu+0x177/0x1f6
[ 0.000000] [<ffffffff8100c13e>] xsave_init+0x26/0x28
[ 0.000000] [<ffffffff8100b0c2>] fpu_init+0x96/0x9d
[ 0.000000] [<ffffffff810111e9>] cpu_init+0x2bc/0x2f3
[ 0.000000] [<ffffffff81e93b06>] trap_init+0x543/0x5eb
[ 0.000000] [<ffffffff81e91c2f>] start_kernel+0x1e2/0x3e6
[ 0.000000] [<ffffffff81e917c2>] ? set_init_arg+0x55/0x55
[ 0.000000] [<ffffffff81e91120>] ? early_idt_handlers+0x120/0x120
[ 0.000000] [<ffffffff81e91471>] x86_64_start_reservations+0x2a/0x2c
[ 0.000000] [<ffffffff81e91561>] x86_64_start_kernel+0xee/0xfb
[ 0.000000] Code: cc 48 8b 15 d7 a3 0d 00 48 63 c3 ff c3 89 0c 82 48 8b 15 c0 a3 0d 00 8b 4d c8 89 0c 82 eb bc 83 c8 ff 48 8b 3d 96 a3 0d 00 89 c2 <48> 0f ae 2f 48 8b 3d 89 a3 0d 00 89 c2 48 0f ae 27 58 5a 5b 41
[ 0.000000] RIP [<ffffffff81e9757c>] setup_init_fpu_buf+0x104/0x122
[ 0.000000] RSP <ffffffff81c03e30>
[ 0.000000] ---[ end trace 9ac76427702d2536 ]---
[ 0.000000] Kernel panic - not syncing: Fatal exception
git bisect start 5e60c2af7a8bde5cfaee8ffd77cfc5b62db0a04e 1795cd9b3a91d4b5473c97f491d63892442212ab --
git bisect good bc1f2f93f68bccd988af7e6f73384860ac241b78 # 09:45 135+ 0 Merge 'socfpga-nex/nios2-upstream' into devel-hourly-2014071701
git bisect bad 0d7e1ca40ef16fce5297579121717fc793761b38 # 09:45 0- 8 Merge 'dynticks/nohz/sysidle' into devel-hourly-2014071701
git bisect good 33c13bf2487a42efa1ac9bcce5623ab74a375c93 # 09:48 135+ 0 Merge 'ubifs/linux-next' into devel-hourly-2014071701
git bisect good 1032f73a32951d7f14ed7fdadedb0fef3c6d0f49 # 09:50 135+ 0 Merge 'spi/for-next' into devel-hourly-2014071701
git bisect bad 1f2859f0786338fe4c2a18ea518a5b2a2f1b5491 # 09:51 0- 2 Merge 'shawnguo/for-next' into devel-hourly-2014071701
git bisect good 73c47688a039158a6d395629d3ab32e606e13d1a # 09:53 235+ 0 Merge 'regulator/for-next' into devel-hourly-2014071701
git bisect bad b973fdf5e6e6fe84b51f79919e5dc8574ae859da # 09:53 0- 8 Merge 'luto/sync_rand_seed' into devel-hourly-2014071701
git bisect good 5778e65d5ca52bebbaa023e177d863e44f098e96 # 10:16 235+ 0 random,x86: Add arch_get_slow_rng_u64
git bisect bad d07c7f1ed61789e175fa975134855be32263be2c # 10:23 0- 50 x86,kaslr: Use MSR_KVM_GET_RNG_SEED for KASLR if available
git bisect good c6f07a63601fbb36c09bf250b5538abb47b51e44 # 10:35 235+ 0 random: Seed pools from arch_get_slow_rng_u64 at startup
# first bad commit: [d07c7f1ed61789e175fa975134855be32263be2c] x86,kaslr: Use MSR_KVM_GET_RNG_SEED for KASLR if available
git bisect good c6f07a63601fbb36c09bf250b5538abb47b51e44 # 10:47 705+ 0 random: Seed pools from arch_get_slow_rng_u64 at startup
git bisect bad 5e60c2af7a8bde5cfaee8ffd77cfc5b62db0a04e # 10:47 0- 4 0day head guard for 'devel-hourly-2014071701'
git bisect good b6603fe574af289dbe9eb9fb4c540bca04f5a053 # 12:16 705+ 0 Merge tag 'for-linus-20140716' of git://git.infradead.org/linux-mtd
git bisect good d4f4d1d45cd1b9aa60e61c2eab25a5d9a79a26f3 # 12:42 705+ 0 Add linux-next specific files for 20140716
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
kvm=(
qemu-system-x86_64
-enable-kvm
-cpu Haswell,+smep,+smap
-kernel $kernel
-m 320
-smp 2
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=10
softlockup_panic=1
nmi_watchdog=panic
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "
"dmesg-quantal-kbuild-120140717102049x86_64-randconfig-s0-071702333.16.0-rc5-00004-gd07c7f11"" of type "text/plain" (12779 bytes)
Download attachment "
"x86_64-randconfig-s0-07170233-5e60c2af7a8bde5cfaee8ffd77cfc5b62db0a04e-general-protection-fault------81892.log"" of type "application/octet-stream" (75499 bytes)
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