linux-kernel - [[DEBUG] force] 2642458962: BUG: unable to handle kernel paging request at ffffc90000997f18

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Date:	Mon, 27 Jun 2016 12:41:44 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Andy Lutomirski <luto@...nel.org>
Cc:	lkp@...org, Andy Lutomirski <luto@...capital.net>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [[DEBUG] force]  2642458962: BUG: unable to handle kernel paging
 request at ffffc90000997f18



FYI, we noticed the following commit:

https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/vmap_stack
commit 26424589626d7f82d09d4e7c0569f9487b2e810a ("[DEBUG] force-enable CONFIG_VMAP_STACK")


on test machine: vm-intel12-yocto-x86_64: 2 threads qemu-system-x86_64 -enable-kvm -cpu Nehalem with 320M memory

caused below changes:


+------------------------------------------+------------+------------+
|                                          | 03e46fd441 | 2642458962 |
+------------------------------------------+------------+------------+
| boot_successes                           | 18         | 21         |
| boot_failures                            | 4          | 9          |
| BUG:kernel_boot_hang                     | 2          |            |
| WARNING:at_kernel/fork.c:#free_task      | 2          |            |
| backtrace:_do_fork                       | 2          |            |
| backtrace:SyS_clone                      | 2          |            |
| BUG:unable_to_handle_kernel              | 0          | 9          |
| Oops                                     | 0          | 9          |
| RIP:_raw_spin_lock_irq                   | 0          | 9          |
| Kernel_panic-not_syncing:Fatal_exception | 0          | 9          |
| backtrace:do_mount                       | 0          | 8          |
| backtrace:SyS_mount                      | 0          | 8          |
+------------------------------------------+------------+------------+



[    4.310442] Freeing unused kernel memory: 1980K (ffff880002011000 - ffff880002200000)
[    4.420716] UDF-fs: warning (device vdb): udf_fill_super: No partition found (2)
[    4.422544] UDF-fs: warning (device vda): udf_fill_super: No partition found (2)
[    4.425052] BUG: unable to handle kernel paging request at ffffc90000997f18
[    4.426645] IP: [<ffffffff81a9ace0>] _raw_spin_lock_irq+0x2c/0x3d
[    4.427869] PGD 1249e067 PUD 1249f067 PMD 11e4e067 PTE 0
[    4.429245] Oops: 0002 [#1] SMP
[    4.430086] Modules linked in:
[    4.430992] CPU: 0 PID: 1741 Comm: mount Not tainted 4.7.0-rc4-00258-g26424589 #1
[    4.432727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[    4.434646] task: ffff88000d950c80 ti: ffff88000d950c80 task.ti: ffff88000d950c80
[    4.436406] RIP: 0010:[<ffffffff81a9ace0>]  [<ffffffff81a9ace0>] _raw_spin_lock_irq+0x2c/0x3d
[    4.438341] RSP: 0018:ffffc90000957c80  EFLAGS: 00010046
[    4.439438] RAX: 0000000000000000 RBX: 7fffffffffffffff RCX: 0000000000000a66
[    4.440735] RDX: 0000000000000001 RSI: ffff880013619bc0 RDI: ffffc90000997f18
[    4.442035] RBP: ffffc90000957c88 R08: 0000000000019bc0 R09: ffffffff81200748
[    4.443323] R10: ffffea0000474900 R11: 000000000001a2a0 R12: ffffc90000997f10
[    4.444614] R13: 0000000000000002 R14: ffffc90000997f18 R15: 00000000ffffffea
[    4.445896] FS:  00007f9ca6a32700(0000) GS:ffff880013600000(0000) knlGS:0000000000000000
[    4.447690] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.448819] CR2: ffffc90000997f18 CR3: 000000000d87c000 CR4: 00000000000006f0
[    4.450102] Stack:
[    4.450810]  ffffc90000997f18 ffffc90000957d00 ffffffff81a982eb 0000000000000246
[    4.452827]  0000000000000000 ffffc90000957d00 ffffffff8112584b 0000000000000000
[    4.454838]  0000000000000246 ffff88000e27f6bc 0000000000000000 ffff88000e27f080
[    4.456845] Call Trace:
[    4.457616]  [<ffffffff81a982eb>] wait_for_common+0x44/0x197
[    4.458719]  [<ffffffff8112584b>] ? try_to_wake_up+0x2dd/0x2ef
[    4.459877]  [<ffffffff81a9845b>] wait_for_completion+0x1d/0x1f
[    4.461027]  [<ffffffff8111db10>] kthread_stop+0x82/0x10a
[    4.462125]  [<ffffffff81117f08>] destroy_workqueue+0x10d/0x1cd
[    4.463347]  [<ffffffff81445236>] xfs_destroy_mount_workqueues+0x49/0x64
[    4.464620]  [<ffffffff81445c03>] xfs_fs_fill_super+0x2c0/0x49c
[    4.465807]  [<ffffffff8123547a>] mount_bdev+0x143/0x195
[    4.466937]  [<ffffffff81445943>] ? xfs_test_remount_options+0x5b/0x5b
[    4.468727]  [<ffffffff81444568>] xfs_fs_mount+0x15/0x17
[    4.469838]  [<ffffffff8123614a>] mount_fs+0x15/0x8c
[    4.470882]  [<ffffffff8124cfc4>] vfs_kern_mount+0x6a/0xfe
[    4.472005]  [<ffffffff8124fc2f>] do_mount+0x985/0xa9a
[    4.473078]  [<ffffffff811e0846>] ? strndup_user+0x3a/0x6a
[    4.474193]  [<ffffffff8124ff6a>] SyS_mount+0x77/0x9f
[    4.475255]  [<ffffffff81a9b081>] entry_SYSCALL_64_fastpath+0x1f/0xbd
[    4.476463] Code: 66 66 66 90 55 48 89 e5 50 48 89 7d f8 fa 66 66 90 66 66 90 e8 2d 0a 70 ff 65 ff 05 73 18 57 7e 31 c0 ba 01 00 00 00 48 8b 7d f8 <f0> 0f b1 17 85 c0 74 07 89 c6 e8 3e 20 6a ff c9 c3 66 66 66 66 
[    4.484413] RIP  [<ffffffff81a9ace0>] _raw_spin_lock_irq+0x2c/0x3d
[    4.485639]  RSP <ffffc90000957c80>
[    4.486509] CR2: ffffc90000997f18
[    4.487366] ---[ end trace 79763b41869f2580 ]---
[    4.488367] Kernel panic - not syncing: Fatal exception


FYI, raw QEMU command line is:

	qemu-system-x86_64 -enable-kvm -cpu Nehalem -kernel /pkg/linux/x86_64-lkp/gcc-4.9/26424589626d7f82d09d4e7c0569f9487b2e810a/vmlinuz-4.7.0-rc4-00258-g26424589 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-intel12-yocto-x86_64-10/validate_boot-1-yocto-minimal-x86_64.cgz-x86_64-lkp-26424589626d7f82d09d4e7c0569f9487b2e810a-20160627-40546-2cgqlo-31.yaml ARCH=x86_64 kconfig=x86_64-lkp branch=linux-devel/devel-hourly-2016062700 commit=26424589626d7f82d09d4e7c0569f9487b2e810a BOOT_IMAGE=/pkg/linux/x86_64-lkp/gcc-4.9/26424589626d7f82d09d4e7c0569f9487b2e810a/vmlinuz-4.7.0-rc4-00258-g26424589 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-intel12-yocto-x86_64/yocto-minimal-x86_64.cgz/x86_64-lkp/gcc-4.9/26424589626d7f82d09d4e7c0569f9487b2e810a/31 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err 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 rw ip=::::vm-intel12-yocto-x86_64-10::dhcp drbd.minor_count=8'  -initrd /fs/KVM/initrd-vm-intel12-yocto-x86_64-10 -m 320 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/KVM/disk0-vm-intel12-yocto-x86_64-10,media=disk,if=virtio -drive file=/fs/KVM/disk1-vm-intel12-yocto-x86_64-10,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-intel12-yocto-x86_64-10 -serial file:/dev/shm/kboot/serial-vm-intel12-yocto-x86_64-10 -daemonize -display none -monitor null 





Thanks,
Kernel Test Robot

View attachment "config-4.7.0-rc4-00258-g26424589" of type "text/plain" (96943 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (12760 bytes)