Date:	Tue, 03 May 2016 09:14:08 +0800
From:	kernel test robot <ying.huang@...ux.intel.com>
TO:	Vedang Patel <vedang.patel@...el.com>
CC:	0day robot <fengguang.wu@...el.com>
Subject: [lkp] [ASoC] 24164c2d37: BUG: unable to handle kernel

FYI, we noticed the following commit:

https://github.com/0day-ci/linux vedang-patel-intel-com/ASoC-Reduce-audio-related-kernel-spew/20160427-070807
commit 24164c2d37ef871e14780078cb1ff4fe90f76e78 ("ASoC: Intel: Skylake: Increase loglevel of debug messages.")

on test machine: vm-kbuild-1G: 2 threads qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap with 1G memory

caused below changes:


[    1.250173] Performance Events: 
[    1.250173] Performance Events: unsupported p6 CPU model 60 unsupported p6 CPU model 60 no PMU driver, software events only.
no PMU driver, software events only.
[    1.286862] BUG: unable to handle kernel 
[    1.286862] BUG: unable to handle kernel NULL pointer dereferenceNULL pointer dereference at           (null)
 at           (null)
[    1.302122] IP:
[    1.302122] IP: [<ffffffff8800c361>] dynamic_debug_init+0x15a/0x669
 [<ffffffff8800c361>] dynamic_debug_init+0x15a/0x669
[    1.308529] PGD 0 
[    1.308529] PGD 0 

[    1.309125] Oops: 0000 [#1] 
[    1.309125] Oops: 0000 [#1] 

[    1.311225] CPU: 0 PID: 1 Comm: swapper Not tainted 4.6.0-rc5-00127-g24164c2 #2
[    1.311225] CPU: 0 PID: 1 Comm: swapper Not tainted 4.6.0-rc5-00127-g24164c2 #2
[    1.313394] task: ffff88000011a000 ti: ffff88000011c000 task.ti: ffff88000011c000
[    1.313394] task: ffff88000011a000 ti: ffff88000011c000 task.ti: ffff88000011c000
[    1.325487] RIP: 0010:[<ffffffff8800c361>] 
[    1.325487] RIP: 0010:[<ffffffff8800c361>]  [<ffffffff8800c361>] dynamic_debug_init+0x15a/0x669
 [<ffffffff8800c361>] dynamic_debug_init+0x15a/0x669
[    1.338189] RSP: 0000:ffff88000011fde0  EFLAGS: 00010286
[    1.338189] RSP: 0000:ffff88000011fde0  EFLAGS: 00010286
[    1.339640] RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffffffffffffff
[    1.339640] RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffffffffffffff
[    1.345523] RDX: ffffffffffffffc4 RSI: ffffffff84875105 RDI: 0000000000000000
[    1.345523] RDX: ffffffffffffffc4 RSI: ffffffff84875105 RDI: 0000000000000000
[    1.350793] RBP: ffff88000011fe30 R08: ffffffffffffffef R09: ffffffffffffffe9
[    1.350793] RBP: ffff88000011fe30 R08: ffffffffffffffef R09: ffffffffffffffe9
[    1.352935] R10: ffff88000011fd90 R11: 0000000000008001 R12: ffffffff8772b1e8
[    1.352935] R10: ffff88000011fd90 R11: 0000000000008001 R12: ffffffff8772b1e8
[    1.366765] R13: 00000000000001d1 R14: 0000000000000000 R15: ffffffff84875105
[    1.366765] R13: 00000000000001d1 R14: 0000000000000000 R15: ffffffff84875105
[    1.371474] FS:  0000000000000000(0000) GS:ffffffff84b4c000(0000) knlGS:0000000000000000
[    1.371474] FS:  0000000000000000(0000) GS:ffffffff84b4c000(0000) knlGS:0000000000000000
[    1.376489] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.376489] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.381509] CR2: 0000000000000000 CR3: 0000000004a0c000 CR4: 00000000000406f0
[    1.381509] CR2: 0000000000000000 CR3: 0000000004a0c000 CR4: 00000000000406f0
[    1.383648] Stack:
[    1.383648] Stack:
[    1.390087]  00000000787097a8
[    1.390087]  00000000787097a8 0000000000000282 0000000000000282 0000000000000aec 0000000000000aec ffffffff8772b148 ffffffff8772b148

[    1.397447]  00000cbe00052d61
[    1.397447]  00000cbe00052d61 ffffffff8800c207 ffffffff8800c207 0000000000000000 0000000000000000 0000000000000000 0000000000000000

[    1.402442]  0000000000000002
[    1.402442]  0000000000000002 000000000000000c 000000000000000c ffff88000011fec8 ffff88000011fec8 ffffffff87f4ab40 ffffffff87f4ab40

[    1.412369] Call Trace:
[    1.412369] Call Trace:
[    1.413129]  [<ffffffff8800c207>] ? dynamic_debug_init_debugfs+0x1e0/0x1e0
[    1.413129]  [<ffffffff8800c207>] ? dynamic_debug_init_debugfs+0x1e0/0x1e0
[    1.420767]  [<ffffffff87f4ab40>] do_one_initcall+0x430/0x7f4
[    1.420767]  [<ffffffff87f4ab40>] do_one_initcall+0x430/0x7f4
[    1.422502]  [<ffffffff81139e00>] ? native_irq_disable+0x7/0x7
[    1.422502]  [<ffffffff81139e00>] ? native_irq_disable+0x7/0x7
[    1.431393]  [<ffffffff83d31d10>] ? _raw_spin_unlock_irq+0x53/0xe4
[    1.431393]  [<ffffffff83d31d10>] ? _raw_spin_unlock_irq+0x53/0xe4
[    1.433155]  [<ffffffff87f4affe>] kernel_init_freeable+0xfa/0x499
[    1.433155]  [<ffffffff87f4affe>] kernel_init_freeable+0xfa/0x499
[    1.441677]  [<ffffffff83d13b83>] kernel_init+0x17/0x3fa
[    1.441677]  [<ffffffff83d13b83>] kernel_init+0x17/0x3fa
[    1.447926]  [<ffffffff83d331d2>] ret_from_fork+0x22/0x50
[    1.447926]  [<ffffffff83d331d2>] ret_from_fork+0x22/0x50
[    1.449567]  [<ffffffff83d13b6c>] ? rest_init+0x243/0x243
[    1.449567]  [<ffffffff83d13b6c>] ? rest_init+0x243/0x243
[    1.457948] Code: 
[    1.457948] Code: f7 f7 f2 f2 ae ae 49 49 8b 8b 7c 7c 24 24 08 08 49 49 89 89 c8 c8 48 48 83 83 c9 c9 ff ff f2 f2 ae ae 49 49 8b 8b 7c 7c 24 24 10 10 49 49 89 89 c9 c9 48 48 83 83 c9 c9 ff ff f2 f2 ae ae 49 49 8b 8b 7c 7c 24 24 18 18 48 48 89 89 ca ca 48 48 83 83 c9 c9 ff ff <f2> <f2> ae ae 4c 4c 89 89 ff ff 48 48 89 89 c8 c8 8b 8b 4d 4d d0 d0 48 48 f7 f7 d0 d0 44 44 29 29 c9 c9 44 44 29 29 c1 c1 29 29 

[    1.479779] RIP 
[    1.479779] RIP  [<ffffffff8800c361>] dynamic_debug_init+0x15a/0x669
 [<ffffffff8800c361>] dynamic_debug_init+0x15a/0x669
[    1.488480]  RSP <ffff88000011fde0>
[    1.488480]  RSP <ffff88000011fde0>
[    1.489588] CR2: 0000000000000000
[    1.489588] CR2: 0000000000000000
[    1.497304] ---[ end trace 13f41c3d0b577fa5 ]---
[    1.497304] ---[ end trace 13f41c3d0b577fa5 ]---


FYI, raw QEMU command line is:

	qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -kernel /pkg/linux/x86_64-randconfig-v0-04271113/gcc-5/24164c2d37ef871e14780078cb1ff4fe90f76e78/vmlinuz-4.6.0-rc5-00127-g24164c2 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-1G-10/bisect_boot-1-debian-x86_64-2015-02-07.cgz-x86_64-randconfig-v0-04271113-24164c2d37ef871e14780078cb1ff4fe90f76e78-20160427-74012-1a1njq3-0.yaml ARCH=x86_64 kconfig=x86_64-randconfig-v0-04271113 branch=linux-devel/devel-spot-201604271010 commit=24164c2d37ef871e14780078cb1ff4fe90f76e78 BOOT_IMAGE=/pkg/linux/x86_64-randconfig-v0-04271113/gcc-5/24164c2d37ef871e14780078cb1ff4fe90f76e78/vmlinuz-4.6.0-rc5-00127-g24164c2 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-1G/debian-x86_64-2015-02-07.cgz/x86_64-randconfig-v0-04271113/gcc-5/24164c2d37ef871e14780078cb1ff4fe90f76e78/0 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-kbuild-1G-10::dhcp'  -initrd /fs/sde1/initrd-vm-kbuild-1G-10 -m 1024 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0,hostfwd=tcp::23009-:22 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -device virtio-scsi-pci,id=scsi0 -drive file=/fs/sde1/disk0-vm-kbuild-1G-10,if=none,id=hd0,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd0,scsi-id=1,lun=0 -drive file=/fs/sde1/disk1-vm-kbuild-1G-10,if=none,id=hd1,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd1,scsi-id=1,lun=1 -drive file=/fs/sde1/disk2-vm-kbuild-1G-10,if=none,id=hd2,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd2,scsi-id=1,lun=2 -drive file=/fs/sde1/disk3-vm-kbuild-1G-10,if=none,id=hd3,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd3,scsi-id=1,lun=3 -drive file=/fs/sde1/disk4-vm-kbuild-1G-10,if=none,id=hd4,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd4,scsi-id=1,lun=4 -pidfile /dev/shm/kboot/pid-vm-kbuild-1G-10 -serial file:/dev/shm/kboot/serial-vm-kbuild-1G-10 -daemonize -display none -monitor null 





Thanks,
Kernel Test Robot

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