Hi Mauro,

0day kernel testing robot got the below dmesg, but don't bisect out the first bad commit.


[    3.627366] usbcore: registered new interface driver dvb_usb_ttusb2
[    3.628139] usbcore: registered new interface driver opera1
[    3.628898] usbcore: registered new interface driver dvb_usb_af9005
[    3.629623] BUG: unable to handle kernel paging request at 0a800000
[    3.630418] IP: [<8d06574a>] af9005_usb_module_init+0x85/0xa0
[    3.631102] *pde = 00000000 [    3.631472] Oops: 0000 [#1] SMP [    3.631888] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.15.0-rc8-next-20140606 #2
[    3.632432] task: 91ce8000 ti: 91ce4000 task.ti: 91ce4000
[    3.632432] EIP: 0060:[<8d06574a>] EFLAGS: 00010206 CPU: 0
[    3.632432] EIP is at af9005_usb_module_init+0x85/0xa0
[    3.632432] EAX: 0a800000 EBX: 00000000 ECX: 00000000 EDX: 00000027
[    3.632432] ESI: 00000000 EDI: 8d077884 EBP: 91ce5f00 ESP: 91ce5ef4
[    3.632432]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[    3.632432] CR0: 8005003b CR2: 0a800000 CR3: 0d208000 CR4: 00000690
[    3.632432] Stack:
[    3.632432]  91d53bc0 00000000 91d53bc0 91ce5f74 8d024ca8 000000d0 8cd1f674 8d0656c5
[    3.632432]  8cf0d2d0 8cb62fb4 93ff6744 91ce5f30 8d0656c5 8cef6000 000004e7 91ce5f74
[    3.632432]  8b85b789 00000296 8cf0d2c0 00000296 91ce8510 00000006 00000006 93ff6745
[    3.632432] Call Trace:
[    3.632432]  [<8d024ca8>] do_one_initcall+0xed/0x17f
[    3.632432]  [<8d0656c5>] ? opera1_driver_init+0x16/0x16
[    3.632432]  [<8d0656c5>] ? opera1_driver_init+0x16/0x16
[    3.632432]  [<8b85b789>] ? parse_args+0x219/0x360
[    3.632432]  [<8d024ecb>] kernel_init_freeable+0x191/0x228
[    3.632432]  [<8d024583>] ? initcall_blacklist+0x81/0x81
[    3.632432]  [<8c90096b>] kernel_init+0xb/0xe0
[    3.632432]  [<8c928b61>] ret_from_kernel_thread+0x21/0x30
[    3.632432]  [<8c900960>] ? rest_init+0xc0/0xc0
[    3.632432] Code: 00 00 80 0a 85 c0 74 09 b8 00 00 80 0a 85 c0 75 1a c7 04 24 0c b0 e9 8c e8 af e5 89 ff 31 c0 c7 05 5c 1b fc 8c 00 00 00 00 eb 16 <a1> 00 00 80 0a c7 05 54 1b fc 8c 00 00 80 0a a3 58 1b fc 8c 31
[    3.632432] EIP: [<8d06574a>] af9005_usb_module_init+0x85/0xa0 SS:ESP 0068:91ce5ef4
[    3.632432] CR2: 000000000a800000
[    3.632432] ---[ end trace 70f7d494d4f324d3 ]---
[    3.652260] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009

git bisect  bad db206f33b3332450f7a98cabaf93d4ab78300534  # 14:57      0-      9  Add linux-next specific files for 20140606
git bisect  bad 8709b073b1751c107e8a75004356b9b690a85a68  # 15:04      0-     19  Revert "Merge branch 'amd-xgbe'"
git bisect  bad 455c6fdbd219161bd09b1165f11699d6d73de11c  # 15:10      1-     20  Linux 3.14
git bisect  bad d8ec26d7f8287f5788a494f56e8814210f0e64be  # 15:15      0-      3  Linux 3.13
git bisect  bad 5e01dc7b26d9f24f39abace5da98ccbd6a5ceb52  # 15:24      0-     18  Linux 3.12
git bisect  bad 6e4664525b1db28f8c4e1130957f70a94c19213e  # 15:28      0-     20  Linux 3.11
git bisect  bad 8bb495e3f02401ee6f76d1b1d77f3ac9f079e376  # 15:32      0-      5  Linux 3.10
git bisect  bad c1be5a5b1b355d40e6cf79cc979eb66dafa24ad1  # 15:37      0-      3  Linux 3.9
git bisect  bad 19f949f52599ba7c3f67a5897ac6be14bfcb1200  # 15:43      0-     10  Linux 3.8
git bisect  bad 29594404d7fe73cd80eaa4ee8c43dcc53970c60e  # 15:47      0-     20  Linux 3.7
git bisect  bad a0d271cbfed1dd50278c6b06bead3d00ba0a88f9  # 15:53      0-      2  Linux 3.6
git bisect  bad 28a33cbc24e4256c143dce96c7d93bf423229f92  # 16:33      2-      2  Linux 3.5
git bisect  bad 76e10d158efb6d4516018846f60c2ab5501900bc  # 16:38      0-      2  Linux 3.4
git bisect  bad c16fa4f2ad19908a47c63d8fa436a1178438c7e7  # 16:48      0-      1  Linux 3.3
git bisect  bad 805a6af8dba5dfdd35ec35dc52ec0122400b2610  # 16:55      0-      6  Linux 3.2
git bisect  bad c3b92c8787367a8bb53d57d9789b558f1295cc96  # 17:01      0-      8  Linux 3.1
git bisect  bad 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe  # 17:05      0-      4  Linux 3.0


This script may reproduce the error.

-----------------------------------------------------------------------------
#!/bin/bash

kernel=$1
initrd=quantal-core-i386.cgz

wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/blob/master/initrd/$initrd

kvm=(
	qemu-system-x86_64 -cpu kvm64 -enable-kvm
 	-kernel $kernel
	-initrd $initrd
	-smp 2
	-m 256M
	-net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio
	-net user,vlan=0
	-net nic,vlan=1,model=e1000
	-net user,vlan=1
	-boot order=nc
	-no-reboot
	-watchdog i6300esb
	-serial stdio
	-display none
	-monitor null
)

append=(
	debug
	sched_debug
	apic=debug
	ignore_loglevel
	sysrq_always_enabled
	panic=10
	prompt_ramdisk=0
	earlyprintk=ttyS0,115200
	console=ttyS0,115200
	console=tty0
	vga=normal
	root=/dev/ram0
	rw
)

"${kvm[@]}" --append "${append[*]}"
-----------------------------------------------------------------------------

Thanks,
Jet