3:41 a.m.
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 master
commit a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f
Author: Frank Schaefer <fschaefer.oss(a)googlemail.com>
AuthorDate: Mon Mar 24 16:33:25 2014 -0300
Commit: Mauro Carvalho Chehab <m.chehab(a)samsung.com>
CommitDate: Fri May 23 13:44:42 2014 -0300
[media] em28xx: move fields wq_trigger and streaming_started from struct em28xx to
struct em28xx_audio
Both wq_trigger and stream_started are used only to control the em28xx
alsa streaming. They don't belong to em28xx common struct.
Signed-off-by: Frank Schäfer <fschaefer.oss(a)googlemail.com>
Signed-off-by: Hans Verkuil <hans.verkuil(a)cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab(a)samsung.com>
Attached dmesg for the parent commit, too. It looks like the parent is
actually clean, just that the rcu-tortuture tests take too long time.
+------------------------------------------+------------+------------+---------------+
| | 3319e6f839 | a5c075cfd2 | next-20140917 |
+------------------------------------------+------------+------------+---------------+
| boot_successes | 0 | 0 | 0 |
| boot_failures | 80 | 20 | 11 |
| BUG:kernel_boot_hang | 80 | 1 | 1 |
| BUG:unable_to_handle_kernel | 0 | 19 | 10 |
| Oops | 0 | 19 | 10 |
| EIP_is_at_af9005_usb_module_init | 0 | 19 | 10 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 19 | 10 |
| backtrace:af9005_usb_module_init | 0 | 19 | 10 |
| backtrace:kernel_init_freeable | 0 | 19 | 10 |
| backtrace:_usb_module_init | 0 | 19 | 10 |
+------------------------------------------+------------+------------+---------------+
[ 8.528015] usbcore: registered new interface driver dvb_usb_ttusb2
[ 8.529751] usbcore: registered new interface driver dvb_usb_af9005
[ 8.529751] usbcore: registered new interface driver dvb_usb_af9005
[ 8.531584] BUG: unable to handle kernel
[ 8.531584] BUG: unable to handle kernel paging requestpaging request at 02e00000
at 02e00000
[ 8.533385] IP:
[ 8.533385] IP: [<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
[<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
[ 8.535613] *pde = 00000000
[ 8.535613] *pde = 00000000
[ 8.536416] Oops: 0000 [#1]
[ 8.536416] Oops: 0000 [#1] PREEMPT PREEMPT DEBUG_PAGEALLOCDEBUG_PAGEALLOC
[ 8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
[ 8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
[ 8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
[ 8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
[ 8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
[ 8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
[ 8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
[ 8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
[ 8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
[ 8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
[ 8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
[ 8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
[ 8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
[ 8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
[ 8.541519] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[ 8.541519] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[ 8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
[ 8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
[ 8.541519] Stack:
[ 8.541519] Stack:
[ 8.541519] 7d9d675b
[ 8.541519] 7d9d675b 89c9df90 89c9df90 7d992a49 7d992a49 7d7d5914 7d7d5914 89c9df4c
89c9df4c 7be3a800 7be3a800 7d08c58c 7d08c58c 8a4c3968 8a4c3968
[ 8.541519] 89c9df80
[ 8.541519] 89c9df80 7be3a966 7be3a966 00000192 00000192 00000006 00000006 00000006
00000006 7d7d3ff4 7d7d3ff4 8a4c397a 8a4c397a 00000200 00000200
[ 8.541519] 7d6b1280
[ 8.541519] 7d6b1280 8a4c3979 8a4c3979 00000006 00000006 000009a6 000009a6 7da32db8
7da32db8 b13eec81 b13eec81 00000006 00000006 000009a6 000009a6
[ 8.541519] Call Trace:
[ 8.541519] Call Trace:
[ 8.541519] [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
[ 8.541519] [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
[ 8.541519] [<7d992a49>] do_one_initcall+0x77/0x106
[ 8.541519] [<7d992a49>] do_one_initcall+0x77/0x106
[ 8.541519] [<7be3a800>] ? parameqn+0x2/0x35
[ 8.541519] [<7be3a800>] ? parameqn+0x2/0x35
[ 8.541519] [<7be3a966>] ? parse_args+0x113/0x25c
[ 8.541519] [<7be3a966>] ? parse_args+0x113/0x25c
[ 8.541519] [<7d992bc2>] kernel_init_freeable+0xea/0x167
[ 8.541519] [<7d992bc2>] kernel_init_freeable+0xea/0x167
[ 8.541519] [<7cf01070>] kernel_init+0x8/0xb8
[ 8.541519] [<7cf01070>] kernel_init+0x8/0xb8
[ 8.541519] [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
[ 8.541519] [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
[ 8.541519] [<7cf01068>] ? rest_init+0x10c/0x10c
[ 8.541519] [<7cf01068>] ? rest_init+0x10c/0x10c
[ 8.541519] Code:
[ 8.541519] Code: 08 08 c2 c2 c7 c7 05 05 44 44 ed ed f9 f9 7d 7d 00 00 00 00 e0 e0 02
02 c7 c7 05 05 40 40 ed ed f9 f9 7d 7d 00 00 00 00 e0 e0 02 02 c7 c7 05 05 3c 3c ed ed f9
f9 7d 7d 00 00 00 00 e0 e0 02 02 75 75 1f 1f b8 b8 00 00 00 00 e0 e0 02 02 85 85 c0 c0 74
74 16 16 <a1> <a1> 00 00 00 00 e0 e0 02 02 c7 c7 05 05 54 54 84 84 8e 8e 7d 7d
00 00 00 00 e0 e0 02 02 a3 a3 58 58 84 84 8e 8e 7d 7d eb eb
[ 8.541519] EIP: [<7d9d67c6>]
[ 8.541519] EIP: [<7d9d67c6>]
af9005_usb_module_init+0x6b/0x9daf9005_usb_module_init+0x6b/0x9d SS:ESP 0068:89c9df2c
SS:ESP 0068:89c9df2c
[ 8.541519] CR2: 0000000002e00000
[ 8.541519] CR2: 0000000002e00000
[ 8.541519] ---[ end trace 768b6faf51370fc7 ]---
[ 8.541519] ---[ end trace 768b6faf51370fc7 ]---
git bisect start v3.16 v3.15 --
git bisect bad 5170a3b24a9141e2349a3420448743b7c68f2223 # 22:58 0- 1 Merge
branch 'akpm' (patches from Andrew Morton)
git bisect bad 1ad96bb0a20fa26b952b2250e89d14b6397bf618 # 23:04 0- 1 Merge
tag 'gpio-v3.16-2' of
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
git bisect bad 412dd3a6daf0cadce1b2d6a34fa3713f40255579 # 23:16 0- 1 Merge
tag 'xfs-for-linus-3.16-rc1' of git://oss.sgi.com/xfs/xfs
git bisect bad b1cce8032f6abe900b078d24f3c3938726528f97 # 23:23 0- 2 Merge
branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
git bisect bad da85d191f58a44e149a7c07dbae78b3042909798 # 23:29 0- 19 Merge
branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
git bisect bad f8409abdc592e13cefbe4e4a24a84b3d5741e85f # 23:38 0- 6 Merge
tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
git bisect bad ed81e780a7dd5698a986f246fad6a1d8d0b6f9ce # 23:44 0- 20 Merge
branch 'x86-vdso-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 3f17ea6dea8ba5668873afa54628a91aaa3fb1c0 # 23:55 1- 19 Merge
branch 'next' (accumulated 3.16 merge window patches) into master
git bisect good 49eb7b0750d9483c74e9c14ae6ea1e9d62481c3c # 00:38 20+ 20 Merge
tag 'tty-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
into next
git bisect bad 535ec214e23adaf72c775938e9e9c6c1cf6fc5b9 # 07:40 0- 2 [media]
mt9p031: Fix BLC configuration restore when disabling test pattern
git bisect good 2c52a2fce0f00479548a076d900d1a2ddd001c27 # 21:01 20+ 20 [media]
em28xx: move struct v4l2_clk *clk from struct em28xx to struct v4l2
git bisect bad a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f # 22:07 0- 9 [media]
em28xx: move fields wq_trigger and streaming_started from struct em28xx to struct
em28xx_audio
git bisect good 58159171c7f201e5d6ea2666c7b3857e782a2861 # 22:52 20+ 20 [media]
em28xx: move progressive/interlaced fields from struct em28xx to struct v4l2
git bisect good 3854b0d847d558bdc820b93ae8a93c0923d0211d # 23:31 20+ 20 [media]
em28xx: move tuner frequency field from struct em28xx to struct v4l2
git bisect good 3319e6f839cf94e33fbad27a21fc4c64f6cec74f # 00:14 20+ 20 [media]
em28xx: remove field tuner_addr from struct em28xx
# first bad commit: [a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f] [media] em28xx: move fields
wq_trigger and streaming_started from struct em28xx to struct em28xx_audio
git bisect good 3319e6f839cf94e33fbad27a21fc4c64f6cec74f # 00:55 60+ 80 [media]
em28xx: remove field tuner_addr from struct em28xx
git bisect bad 76c2c6dc46fbb5bdd73571ebd0897696c5ab4d73 # 00:58 0- 11 Add
linux-next specific files for 20140917
git bisect bad 4d046e96046faac456f4f5c94c152c52a9c51a3a # 01:09 2- 57 Add
linux-next specific files for 20140918
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=quantal-core-i386.cgz
wget --no-clobber
https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-initrd $initrd
-m 320
-smp 2
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
_______________________________________________
LKP mailing list
LKP(a)linux.intel.com
8:57 p.m.
Hi Fengguang,
thank you for reporting this issue.
Am 19.09.2014 um 03:41 schrieb Fengguang Wu:
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 master
commit a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f
Author: Frank Schaefer <fschaefer.oss(a)googlemail.com>
AuthorDate: Mon Mar 24 16:33:25 2014 -0300
Commit: Mauro Carvalho Chehab <m.chehab(a)samsung.com>
CommitDate: Fri May 23 13:44:42 2014 -0300
[media] em28xx: move fields wq_trigger and streaming_started from struct em28xx to
struct em28xx_audio
Both wq_trigger and stream_started are used only to control the em28xx
alsa streaming. They don't belong to em28xx common struct.
Signed-off-by: Frank Schäfer <fschaefer.oss(a)googlemail.com>
Signed-off-by: Hans Verkuil <hans.verkuil(a)cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab(a)samsung.com>
This patch affects the em28xx-alsa module (em28xx-audio.c) only.
Now take a look at your kernel config:
...
#
# Webcam, TV (analog/digital) USB devices
#
CONFIG_VIDEO_EM28XX=y
CONFIG_VIDEO_EM28XX_V4L2=y
# CONFIG_VIDEO_EM28XX_ALSA is not set
CONFIG_VIDEO_EM28XX_DVB=y
CONFIG_VIDEO_EM28XX_RC=y
...
The em28xx-alsa module is disabled.
Attached dmesg for the parent commit, too. It looks like the parent is
actually clean, just that the rcu-tortuture tests take too long time.
+------------------------------------------+------------+------------+---------------+
| | 3319e6f839 | a5c075cfd2 | next-20140917 |
+------------------------------------------+------------+------------+---------------+
| boot_successes | 0 | 0 | 0 |
| boot_failures | 80 | 20 | 11 |
| BUG:kernel_boot_hang | 80 | 1 | 1 |
| BUG:unable_to_handle_kernel | 0 | 19 | 10 |
| Oops | 0 | 19 | 10 |
| EIP_is_at_af9005_usb_module_init | 0 | 19 | 10 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 19 | 10 |
| backtrace:af9005_usb_module_init | 0 | 19 | 10 |
| backtrace:kernel_init_freeable | 0 | 19 | 10 |
| backtrace:_usb_module_init | 0 | 19 | 10 |
+------------------------------------------+------------+------------+---------------+
[ 8.528015] usbcore: registered new interface driver dvb_usb_ttusb2
[ 8.529751] usbcore: registered new interface driver dvb_usb_af9005
[ 8.529751] usbcore: registered new interface driver dvb_usb_af9005
[ 8.531584] BUG: unable to handle kernel
[ 8.531584] BUG: unable to handle kernel paging requestpaging request at 02e00000
at 02e00000
[ 8.533385] IP:
[ 8.533385] IP: [<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
[<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
And this tells us what is
going wrong:
(gdb) list *(af9005_usb_module_init+0x83)
0x2d11 is in af9005_usb_module_init
(drivers/media/usb/dvb-usb/af9005.c:1092).
1087 if (rc_decode == NULL || rc_keys == NULL || rc_keys_size
== NULL) {
1088 err("af9005_rc_decode function not found,
disabling remote");
1089 af9005_properties.rc.legacy.rc_query = NULL;
1090 } else {
1091 af9005_properties.rc.legacy.rc_map_table = rc_keys;
1092 af9005_properties.rc.legacy.rc_map_size =
*rc_keys_size;
1093 }
1094
1095 return 0;
1096 }
So it happens in line 1092 when rc_keys_size is accessed.
According to your kernel config you have
CONFIG_MODULES disabled
CONFIG_DVB_USB_AF9005 enabled
CONFIG_DVB_USB_AF9005_REMOTE disabled
So af9005 is compiled in without remote control support.
Thus we should have hit the "if"-path, which also prints a message about
the missing remote control support.
Instead, we have hit the "else" path, which means that rc_decode,
rc_keys and rc_keys_size are all != NULL, although they should be NULL.
You can verify this by enabling CONFIG_DVB_USB_AF9005_REMOTE.
That makes the issue disappear.
Now let's go a few lines up to see where these pointers come from:
1084 rc_decode = symbol_request(af9005_rc_decode);
1085 rc_keys = symbol_request(rc_map_af9005_table);
1086 rc_keys_size = symbol_request(rc_map_af9005_table_size);
So symbol_request() returns pointers.!= NULL
A closer look at the definition of symbol_request() shows, that it does
nothing if CONFIG_MODULES is disabled (it just returns its argument).
One possibility to fix this bug would be to embrace these three lines with
#ifdef CONFIG_DVB_USB_AF9005_REMOTE
...
#endif
[ 8.535613] *pde = 00000000
[ 8.535613] *pde = 00000000
[ 8.536416] Oops: 0000 [#1]
[ 8.536416] Oops: 0000 [#1] PREEMPT PREEMPT DEBUG_PAGEALLOCDEBUG_PAGEALLOC
[ 8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
[ 8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
[ 8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
[ 8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
[ 8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
[ 8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
[ 8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
[ 8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
[ 8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
[ 8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
[ 8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
[ 8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
[ 8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
[ 8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
[ 8.541519] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[ 8.541519] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[ 8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
[ 8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
[ 8.541519] Stack:
[ 8.541519] Stack:
[ 8.541519] 7d9d675b
[ 8.541519] 7d9d675b 89c9df90 89c9df90 7d992a49 7d992a49 7d7d5914 7d7d5914 89c9df4c
89c9df4c 7be3a800 7be3a800 7d08c58c 7d08c58c 8a4c3968 8a4c3968
[ 8.541519] 89c9df80
[ 8.541519] 89c9df80 7be3a966 7be3a966 00000192 00000192 00000006 00000006 00000006
00000006 7d7d3ff4 7d7d3ff4 8a4c397a 8a4c397a 00000200 00000200
[ 8.541519] 7d6b1280
[ 8.541519] 7d6b1280 8a4c3979 8a4c3979 00000006 00000006 000009a6 000009a6 7da32db8
7da32db8 b13eec81 b13eec81 00000006 00000006 000009a6 000009a6
[ 8.541519] Call Trace:
[ 8.541519] Call Trace:
[ 8.541519] [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
[ 8.541519] [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
[ 8.541519] [<7d992a49>] do_one_initcall+0x77/0x106
[ 8.541519] [<7d992a49>] do_one_initcall+0x77/0x106
[ 8.541519] [<7be3a800>] ? parameqn+0x2/0x35
[ 8.541519] [<7be3a800>] ? parameqn+0x2/0x35
[ 8.541519] [<7be3a966>] ? parse_args+0x113/0x25c
[ 8.541519] [<7be3a966>] ? parse_args+0x113/0x25c
[ 8.541519] [<7d992bc2>] kernel_init_freeable+0xea/0x167
[ 8.541519] [<7d992bc2>] kernel_init_freeable+0xea/0x167
[ 8.541519] [<7cf01070>] kernel_init+0x8/0xb8
[ 8.541519] [<7cf01070>] kernel_init+0x8/0xb8
[ 8.541519] [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
[ 8.541519] [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
[ 8.541519] [<7cf01068>] ? rest_init+0x10c/0x10c
[ 8.541519] [<7cf01068>] ? rest_init+0x10c/0x10c
[ 8.541519] Code:
[ 8.541519] Code: 08 08 c2 c2 c7 c7 05 05 44 44 ed ed f9 f9 7d 7d 00 00 00 00 e0 e0 02
02 c7 c7 05 05 40 40 ed ed f9 f9 7d 7d 00 00 00 00 e0 e0 02 02 c7 c7 05 05 3c 3c ed ed f9
f9 7d 7d 00 00 00 00 e0 e0 02 02 75 75 1f 1f b8 b8 00 00 00 00 e0 e0 02 02 85 85 c0 c0 74
74 16 16 <a1> <a1> 00 00 00 00 e0 e0 02 02 c7 c7 05 05 54 54 84 84 8e 8e 7d 7d
00 00 00 00 e0 e0 02 02 a3 a3 58 58 84 84 8e 8e 7d 7d eb eb
[ 8.541519] EIP: [<7d9d67c6>]
[ 8.541519] EIP: [<7d9d67c6>]
af9005_usb_module_init+0x6b/0x9daf9005_usb_module_init+0x6b/0x9d SS:ESP 0068:89c9df2c
SS:ESP 0068:89c9df2c
[ 8.541519] CR2: 0000000002e00000
[ 8.541519] CR2: 0000000002e00000
[ 8.541519] ---[ end trace 768b6faf51370fc7 ]---
[ 8.541519] ---[ end trace 768b6faf51370fc7 ]---
git bisect start v3.16 v3.15 --
git bisect bad 5170a3b24a9141e2349a3420448743b7c68f2223 # 22:58 0- 1 Merge
branch 'akpm' (patches from Andrew Morton)
git bisect bad 1ad96bb0a20fa26b952b2250e89d14b6397bf618 # 23:04 0- 1 Merge
tag 'gpio-v3.16-2' of
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
git bisect bad 412dd3a6daf0cadce1b2d6a34fa3713f40255579 # 23:16 0- 1 Merge
tag 'xfs-for-linus-3.16-rc1' of git://oss.sgi.com/xfs/xfs
git bisect bad b1cce8032f6abe900b078d24f3c3938726528f97 # 23:23 0- 2 Merge
branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
git bisect bad da85d191f58a44e149a7c07dbae78b3042909798 # 23:29 0- 19 Merge
branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
git bisect bad f8409abdc592e13cefbe4e4a24a84b3d5741e85f # 23:38 0- 6 Merge
tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
git bisect bad ed81e780a7dd5698a986f246fad6a1d8d0b6f9ce # 23:44 0- 20 Merge
branch 'x86-vdso-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 3f17ea6dea8ba5668873afa54628a91aaa3fb1c0 # 23:55 1- 19 Merge
branch 'next' (accumulated 3.16 merge window patches) into master
git bisect good 49eb7b0750d9483c74e9c14ae6ea1e9d62481c3c # 00:38 20+ 20 Merge
tag 'tty-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
into next
git bisect bad 535ec214e23adaf72c775938e9e9c6c1cf6fc5b9 # 07:40 0- 2 [media]
mt9p031: Fix BLC configuration restore when disabling test pattern
git bisect good 2c52a2fce0f00479548a076d900d1a2ddd001c27 # 21:01 20+ 20 [media]
em28xx: move struct v4l2_clk *clk from struct em28xx to struct v4l2
git bisect bad a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f # 22:07 0- 9 [media]
em28xx: move fields wq_trigger and streaming_started from struct em28xx to struct
em28xx_audio
git bisect good 58159171c7f201e5d6ea2666c7b3857e782a2861 # 22:52 20+ 20 [media]
em28xx: move progressive/interlaced fields from struct em28xx to struct v4l2
git bisect good 3854b0d847d558bdc820b93ae8a93c0923d0211d # 23:31 20+ 20 [media]
em28xx: move tuner frequency field from struct em28xx to struct v4l2
git bisect good 3319e6f839cf94e33fbad27a21fc4c64f6cec74f # 00:14 20+ 20 [media]
em28xx: remove field tuner_addr from struct em28xx
# first bad commit: [a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f] [media] em28xx: move
fields wq_trigger and streaming_started from struct em28xx to struct em28xx_audio
git bisect good 3319e6f839cf94e33fbad27a21fc4c64f6cec74f # 00:55 60+ 80 [media]
em28xx: remove field tuner_addr from struct em28xx
git bisect bad 76c2c6dc46fbb5bdd73571ebd0897696c5ab4d73 # 00:58 0- 11 Add
linux-next specific files for 20140917
git bisect bad 4d046e96046faac456f4f5c94c152c52a9c51a3a # 01:09 2- 57 Add
linux-next specific files for 20140918
Something went wrong during your bisection.
I can reproduce this issue with kernel v3.15, too, which doesn't have
the above commit yet.
Regards,
Frank Schäfer
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=quantal-core-i386.cgz
wget --no-clobber
https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-initrd $initrd
-m 320
-smp 2
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
_______________________________________________
LKP mailing list
LKP(a)linux.intel.com
9:01 p.m.
Hi Fengguang,
thank you for reporting this issue.
Am 19.09.2014 um 03:41 schrieb Fengguang Wu:
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 master
commit a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f
Author: Frank Schaefer <fschaefer.oss(a)googlemail.com>
AuthorDate: Mon Mar 24 16:33:25 2014 -0300
Commit: Mauro Carvalho Chehab <m.chehab(a)samsung.com>
CommitDate: Fri May 23 13:44:42 2014 -0300
[media] em28xx: move fields wq_trigger and streaming_started from struct em28xx to
struct em28xx_audio
Both wq_trigger and stream_started are used only to control the em28xx
alsa streaming. They don't belong to em28xx common struct.
Signed-off-by: Frank Schäfer <fschaefer.oss(a)googlemail.com>
Signed-off-by: Hans Verkuil <hans.verkuil(a)cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab(a)samsung.com>
This patch affects the em28xx-alsa module (em28xx-audio.c) only.
Now take a look at your kernel config:
...
#
# Webcam, TV (analog/digital) USB devices
#
CONFIG_VIDEO_EM28XX=y
CONFIG_VIDEO_EM28XX_V4L2=y
# CONFIG_VIDEO_EM28XX_ALSA is not set
CONFIG_VIDEO_EM28XX_DVB=y
CONFIG_VIDEO_EM28XX_RC=y
...
The em28xx-alsa module is disabled.
Attached dmesg for the parent commit, too. It looks like the parent
is
actually clean, just that the rcu-tortuture tests take too long time.
+------------------------------------------+------------+------------+---------------+
| | 3319e6f839 | a5c075cfd2 | next-20140917 |
+------------------------------------------+------------+------------+---------------+
| boot_successes | 0 | 0 | 0 |
| boot_failures | 80 | 20 | 11 |
| BUG:kernel_boot_hang | 80 | 1 | 1 |
| BUG:unable_to_handle_kernel | 0 | 19 | 10 |
| Oops | 0 | 19 | 10 |
| EIP_is_at_af9005_usb_module_init | 0 | 19 | 10 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 19 | 10 |
| backtrace:af9005_usb_module_init | 0 | 19 | 10 |
| backtrace:kernel_init_freeable | 0 | 19 | 10 |
| backtrace:_usb_module_init | 0 | 19 | 10 |
+------------------------------------------+------------+------------+---------------+
[ 8.528015] usbcore: registered new interface driver dvb_usb_ttusb2
[ 8.529751] usbcore: registered new interface driver dvb_usb_af9005
[ 8.529751] usbcore: registered new interface driver dvb_usb_af9005
[ 8.531584] BUG: unable to handle kernel
[ 8.531584] BUG: unable to handle kernel paging requestpaging request at 02e00000
at 02e00000
[ 8.533385] IP:
[ 8.533385] IP: [<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
[<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
And this tells us what is
going wrong:
(gdb) list *(af9005_usb_module_init+0x83)
0x2d11 is in af9005_usb_module_init
(drivers/media/usb/dvb-usb/af9005.c:1092).
1087 if (rc_decode == NULL || rc_keys == NULL || rc_keys_size
== NULL) {
1088 err("af9005_rc_decode function not found,
disabling remote");
1089 af9005_properties.rc.legacy.rc_query = NULL;
1090 } else {
1091 af9005_properties.rc.legacy.rc_map_table = rc_keys;
1092 af9005_properties.rc.legacy.rc_map_size =
*rc_keys_size;
1093 }
1094
1095 return 0;
1096 }
So it happens in line 1092 when rc_keys_size is accessed.
According to your kernel config you have
CONFIG_MODULES disabled
CONFIG_DVB_USB_AF9005 enabled
CONFIG_DVB_USB_AF9005_REMOTE disabled
So af9005 is compiled in without remote control support.
Thus we should have hit the "if"-path, which also prints a message about
the missing remote control support.
Instead, we have hit the "else" path, which means that rc_decode,
rc_keys and rc_keys_size are all != NULL, although they should be NULL.
You can verify this by enabling CONFIG_DVB_USB_AF9005_REMOTE.
That makes the issue disappear.
Now let's go a few lines up to see where these pointers come from:
1084 rc_decode = symbol_request(af9005_rc_decode);
1085 rc_keys = symbol_request(rc_map_af9005_table);
1086 rc_keys_size = symbol_request(rc_map_af9005_table_size);
So symbol_request() returns pointers.!= NULL
A closer look at the definition of symbol_request() shows, that it does
nothing if CONFIG_MODULES is disabled (it just returns its argument).
One possibility to fix this bug would be to embrace these three lines with
#ifdef CONFIG_DVB_USB_AF9005_REMOTE
...
#endif
[ 8.535613] *pde = 00000000
[ 8.535613] *pde = 00000000
[ 8.536416] Oops: 0000 [#1]
[ 8.536416] Oops: 0000 [#1] PREEMPT PREEMPT DEBUG_PAGEALLOCDEBUG_PAGEALLOC
[ 8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
[ 8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
[ 8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
[ 8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
[ 8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
[ 8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
[ 8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
[ 8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
[ 8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
[ 8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
[ 8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
[ 8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
[ 8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
[ 8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
[ 8.541519] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[ 8.541519] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[ 8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
[ 8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
[ 8.541519] Stack:
[ 8.541519] Stack:
[ 8.541519] 7d9d675b
[ 8.541519] 7d9d675b 89c9df90 89c9df90 7d992a49 7d992a49 7d7d5914 7d7d5914 89c9df4c
89c9df4c 7be3a800 7be3a800 7d08c58c 7d08c58c 8a4c3968 8a4c3968
[ 8.541519] 89c9df80
[ 8.541519] 89c9df80 7be3a966 7be3a966 00000192 00000192 00000006 00000006 00000006
00000006 7d7d3ff4 7d7d3ff4 8a4c397a 8a4c397a 00000200 00000200
[ 8.541519] 7d6b1280
[ 8.541519] 7d6b1280 8a4c3979 8a4c3979 00000006 00000006 000009a6 000009a6 7da32db8
7da32db8 b13eec81 b13eec81 00000006 00000006 000009a6 000009a6
[ 8.541519] Call Trace:
[ 8.541519] Call Trace:
[ 8.541519] [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
[ 8.541519] [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
[ 8.541519] [<7d992a49>] do_one_initcall+0x77/0x106
[ 8.541519] [<7d992a49>] do_one_initcall+0x77/0x106
[ 8.541519] [<7be3a800>] ? parameqn+0x2/0x35
[ 8.541519] [<7be3a800>] ? parameqn+0x2/0x35
[ 8.541519] [<7be3a966>] ? parse_args+0x113/0x25c
[ 8.541519] [<7be3a966>] ? parse_args+0x113/0x25c
[ 8.541519] [<7d992bc2>] kernel_init_freeable+0xea/0x167
[ 8.541519] [<7d992bc2>] kernel_init_freeable+0xea/0x167
[ 8.541519] [<7cf01070>] kernel_init+0x8/0xb8
[ 8.541519] [<7cf01070>] kernel_init+0x8/0xb8
[ 8.541519] [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
[ 8.541519] [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
[ 8.541519] [<7cf01068>] ? rest_init+0x10c/0x10c
[ 8.541519] [<7cf01068>] ? rest_init+0x10c/0x10c
[ 8.541519] Code:
[ 8.541519] Code: 08 08 c2 c2 c7 c7 05 05 44 44 ed ed f9 f9 7d 7d 00 00 00 00 e0 e0 02
02 c7 c7 05 05 40 40 ed ed f9 f9 7d 7d 00 00 00 00 e0 e0 02 02 c7 c7 05 05 3c 3c ed ed f9
f9 7d 7d 00 00 00 00 e0 e0 02 02 75 75 1f 1f b8 b8 00 00 00 00 e0 e0 02 02 85 85 c0 c0 74
74 16 16 <a1> <a1> 00 00 00 00 e0 e0 02 02 c7 c7 05 05 54 54 84 84 8e 8e 7d 7d
00 00 00 00 e0 e0 02 02 a3 a3 58 58 84 84 8e 8e 7d 7d eb eb
[ 8.541519] EIP: [<7d9d67c6>]
[ 8.541519] EIP: [<7d9d67c6>]
af9005_usb_module_init+0x6b/0x9daf9005_usb_module_init+0x6b/0x9d SS:ESP 0068:89c9df2c
SS:ESP 0068:89c9df2c
[ 8.541519] CR2: 0000000002e00000
[ 8.541519] CR2: 0000000002e00000
[ 8.541519] ---[ end trace 768b6faf51370fc7 ]---
[ 8.541519] ---[ end trace 768b6faf51370fc7 ]---
git bisect start v3.16 v3.15 --
git bisect bad 5170a3b24a9141e2349a3420448743b7c68f2223 # 22:58 0- 1 Merge
branch 'akpm' (patches from Andrew Morton)
git bisect bad 1ad96bb0a20fa26b952b2250e89d14b6397bf618 # 23:04 0- 1 Merge
tag 'gpio-v3.16-2' of
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
git bisect bad 412dd3a6daf0cadce1b2d6a34fa3713f40255579 # 23:16 0- 1 Merge
tag 'xfs-for-linus-3.16-rc1' of git://oss.sgi.com/xfs/xfs
git bisect bad b1cce8032f6abe900b078d24f3c3938726528f97 # 23:23 0- 2 Merge
branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
git bisect bad da85d191f58a44e149a7c07dbae78b3042909798 # 23:29 0- 19 Merge
branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
git bisect bad f8409abdc592e13cefbe4e4a24a84b3d5741e85f # 23:38 0- 6 Merge
tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
git bisect bad ed81e780a7dd5698a986f246fad6a1d8d0b6f9ce # 23:44 0- 20 Merge
branch 'x86-vdso-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 3f17ea6dea8ba5668873afa54628a91aaa3fb1c0 # 23:55 1- 19 Merge
branch 'next' (accumulated 3.16 merge window patches) into master
git bisect good 49eb7b0750d9483c74e9c14ae6ea1e9d62481c3c # 00:38 20+ 20 Merge
tag 'tty-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
into next
git bisect bad 535ec214e23adaf72c775938e9e9c6c1cf6fc5b9 # 07:40 0- 2 [media]
mt9p031: Fix BLC configuration restore when disabling test pattern
git bisect good 2c52a2fce0f00479548a076d900d1a2ddd001c27 # 21:01 20+ 20 [media]
em28xx: move struct v4l2_clk *clk from struct em28xx to struct v4l2
git bisect bad a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f # 22:07 0- 9 [media]
em28xx: move fields wq_trigger and streaming_started from struct em28xx to struct
em28xx_audio
git bisect good 58159171c7f201e5d6ea2666c7b3857e782a2861 # 22:52 20+ 20 [media]
em28xx: move progressive/interlaced fields from struct em28xx to struct v4l2
git bisect good 3854b0d847d558bdc820b93ae8a93c0923d0211d # 23:31 20+ 20 [media]
em28xx: move tuner frequency field from struct em28xx to struct v4l2
git bisect good 3319e6f839cf94e33fbad27a21fc4c64f6cec74f # 00:14 20+ 20 [media]
em28xx: remove field tuner_addr from struct em28xx
# first bad commit: [a5c075cfd2386a4f3ab4f8ed2830ebee557d4b3f] [media] em28xx: move
fields wq_trigger and streaming_started from struct em28xx to struct em28xx_audio
git bisect good 3319e6f839cf94e33fbad27a21fc4c64f6cec74f # 00:55 60+ 80 [media]
em28xx: remove field tuner_addr from struct em28xx
git bisect bad 76c2c6dc46fbb5bdd73571ebd0897696c5ab4d73 # 00:58 0- 11 Add
linux-next specific files for 20140917
git bisect bad 4d046e96046faac456f4f5c94c152c52a9c51a3a # 01:09 2- 57 Add
linux-next specific files for 20140918
Something went wrong during your bisection.
I can reproduce this issue with kernel v3.15, too, which doesn't have
the above commit yet.
Regards,
Frank Schäfer
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=quantal-core-i386.cgz
wget --no-clobber
https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-initrd $initrd
-m 320
-smp 2
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
_______________________________________________
LKP mailing list
LKP(a)linux.intel.com
9:21 p.m.
New subject: [media/dvb_usb_af9005] BUG: unable to handle kernel paging request (WAS: [media/em28xx] BUG: unable to handle kernel)
(adjusting the title and adding Luca Olivetti (dvb_usb_af9005 author)
and Antti Palosaari)
Am 19.09.2014 um 21:01 schrieb Frank Schäfer:
Hi Fengguang,
thank you for reporting this issue.
Am 19.09.2014 um 03:41 schrieb Fengguang Wu:
[...]
> [ 8.528015] usbcore: registered new interface driver
dvb_usb_ttusb2
> [ 8.529751] usbcore: registered new interface driver dvb_usb_af9005
> [ 8.529751] usbcore: registered new interface driver dvb_usb_af9005
> [ 8.531584] BUG: unable to handle kernel
> [ 8.531584] BUG: unable to handle kernel paging requestpaging request at 02e00000
> at 02e00000
> [ 8.533385] IP:
> [ 8.533385] IP: [<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
> [<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
And this tells us what is going wrong:
(gdb) list *(af9005_usb_module_init+0x83)
0x2d11 is in af9005_usb_module_init
(drivers/media/usb/dvb-usb/af9005.c:1092).
1087 if (rc_decode == NULL || rc_keys == NULL || rc_keys_size
== NULL) {
1088 err("af9005_rc_decode function not found,
disabling remote");
1089 af9005_properties.rc.legacy.rc_query = NULL;
1090 } else {
1091 af9005_properties.rc.legacy.rc_map_table = rc_keys;
1092 af9005_properties.rc.legacy.rc_map_size =
*rc_keys_size;
1093 }
1094
1095 return 0;
1096 }
So it happens in line 1092 when rc_keys_size is accessed.
According to your kernel config you have
CONFIG_MODULES disabled
CONFIG_DVB_USB_AF9005 enabled
CONFIG_DVB_USB_AF9005_REMOTE disabled
So af9005 is compiled in without remote control support.
Thus we should have hit the "if"-path, which also prints a message about
the missing remote control support.
Instead, we have hit the "else" path, which means that rc_decode,
rc_keys and rc_keys_size are all != NULL, although they should be NULL.
You can verify this by enabling CONFIG_DVB_USB_AF9005_REMOTE.
That makes the issue disappear.
Now let's go a few lines up to see where these pointers come from:
1084 rc_decode = symbol_request(af9005_rc_decode);
1085 rc_keys = symbol_request(rc_map_af9005_table);
1086 rc_keys_size = symbol_request(rc_map_af9005_table_size);
So symbol_request() returns pointers.!= NULL
A closer look at the definition of symbol_request() shows, that it does
nothing if CONFIG_MODULES is disabled (it just returns its argument).
One possibility to fix this bug would be to embrace these three lines with
#ifdef CONFIG_DVB_USB_AF9005_REMOTE
...
#endif
Luca, what do you think ?
This seems to be an ancient bug, which is known at least since 5 1/2 years:
https://lkml.org/lkml/2009/2/4/350
Regards,
Frank Schäfer
> [ 8.535613] *pde = 00000000
> [ 8.535613] *pde = 00000000
>
> [ 8.536416] Oops: 0000 [#1]
> [ 8.536416] Oops: 0000 [#1] PREEMPT PREEMPT DEBUG_PAGEALLOCDEBUG_PAGEALLOC
>
> [ 8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
> [ 8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
> [ 8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
> [ 8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
> [ 8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
> [ 8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
> [ 8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
> [ 8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
> [ 8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
> [ 8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
> [ 8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
> [ 8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
> [ 8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
> [ 8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
> [ 8.541519] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
> [ 8.541519] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
> [ 8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
> [ 8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
> [ 8.541519] Stack:
> [ 8.541519] Stack:
> [ 8.541519] 7d9d675b
> [ 8.541519] 7d9d675b 89c9df90 89c9df90 7d992a49 7d992a49 7d7d5914 7d7d5914
89c9df4c 89c9df4c 7be3a800 7be3a800 7d08c58c 7d08c58c 8a4c3968 8a4c3968
>
> [ 8.541519] 89c9df80
> [ 8.541519] 89c9df80 7be3a966 7be3a966 00000192 00000192 00000006 00000006
00000006 00000006 7d7d3ff4 7d7d3ff4 8a4c397a 8a4c397a 00000200 00000200
>
> [ 8.541519] 7d6b1280
> [ 8.541519] 7d6b1280 8a4c3979 8a4c3979 00000006 00000006 000009a6 000009a6
7da32db8 7da32db8 b13eec81 b13eec81 00000006 00000006 000009a6 000009a6
>
> [ 8.541519] Call Trace:
> [ 8.541519] Call Trace:
> [ 8.541519] [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
> [ 8.541519] [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
> [ 8.541519] [<7d992a49>] do_one_initcall+0x77/0x106
> [ 8.541519] [<7d992a49>] do_one_initcall+0x77/0x106
> [ 8.541519] [<7be3a800>] ? parameqn+0x2/0x35
> [ 8.541519] [<7be3a800>] ? parameqn+0x2/0x35
> [ 8.541519] [<7be3a966>] ? parse_args+0x113/0x25c
> [ 8.541519] [<7be3a966>] ? parse_args+0x113/0x25c
> [ 8.541519] [<7d992bc2>] kernel_init_freeable+0xea/0x167
> [ 8.541519] [<7d992bc2>] kernel_init_freeable+0xea/0x167
> [ 8.541519] [<7cf01070>] kernel_init+0x8/0xb8
> [ 8.541519] [<7cf01070>] kernel_init+0x8/0xb8
> [ 8.541519] [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
> [ 8.541519] [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
> [ 8.541519] [<7cf01068>] ? rest_init+0x10c/0x10c
> [ 8.541519] [<7cf01068>] ? rest_init+0x10c/0x10c
> [ 8.541519] Code:
> [ 8.541519] Code: 08 08 c2 c2 c7 c7 05 05 44 44 ed ed f9 f9 7d 7d 00 00 00 00 e0
e0 02 02 c7 c7 05 05 40 40 ed ed f9 f9 7d 7d 00 00 00 00 e0 e0 02 02 c7 c7 05 05 3c 3c ed
ed f9 f9 7d 7d 00 00 00 00 e0 e0 02 02 75 75 1f 1f b8 b8 00 00 00 00 e0 e0 02 02 85 85 c0
c0 74 74 16 16 <a1> <a1> 00 00 00 00 e0 e0 02 02 c7 c7 05 05 54 54 84 84 8e 8e
7d 7d 00 00 00 00 e0 e0 02 02 a3 a3 58 58 84 84 8e 8e 7d 7d eb eb
>
> [ 8.541519] EIP: [<7d9d67c6>]
> [ 8.541519] EIP: [<7d9d67c6>]
af9005_usb_module_init+0x6b/0x9daf9005_usb_module_init+0x6b/0x9d SS:ESP 0068:89c9df2c
> SS:ESP 0068:89c9df2c
> [ 8.541519] CR2: 0000000002e00000
> [ 8.541519] CR2: 0000000002e00000
> [ 8.541519] ---[ end trace 768b6faf51370fc7 ]---
> [ 8.541519] ---[ end trace 768b6faf51370fc7 ]---
[...]
> This script may reproduce the error.
>
> ----------------------------------------------------------------------------
> #!/bin/bash
>
> kernel=$1
> initrd=quantal-core-i386.cgz
>
> wget --no-clobber
https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
>
> kvm=(
> qemu-system-x86_64
> -cpu kvm64
> -enable-kvm
> -kernel $kernel
> -initrd $initrd
> -m 320
> -smp 2
> -net nic,vlan=1,model=e1000
> -net user,vlan=1
> -boot order=nc
> -no-reboot
> -watchdog i6300esb
> -rtc base=localtime
> -serial stdio
> -display none
> -monitor null
> )
>
> append=(
> hung_task_panic=1
> earlyprintk=ttyS0,115200
> debug
> apic=debug
> sysrq_always_enabled
> rcupdate.rcu_cpu_stall_timeout=100
> panic=-1
> softlockup_panic=1
> nmi_watchdog=panic
> oops=panic
> load_ramdisk=2
> prompt_ramdisk=0
> console=ttyS0,115200
> console=tty0
> vga=normal
> root=/dev/ram0
> rw
> drbd.minor_count=8
> )
>
> "${kvm[@]}" --append "${append[*]}"
> ----------------------------------------------------------------------------
>
> Thanks,
> Fengguang
>
>
> _______________________________________________
> LKP mailing list
> LKP(a)linux.intel.com
9:55 p.m.
New subject: [media/dvb_usb_af9005] BUG: unable to handle kernel paging request (WAS: [media/em28xx] BUG: unable to handle kernel)
El 19/09/14 21:22, Frank Schäfer ha escrit:
>
> So symbol_request() returns pointers.!= NULL
>
> A closer look at the definition of symbol_request() shows, that it does
> nothing if CONFIG_MODULES is disabled (it just returns its argument).
>
>
> One possibility to fix this bug would be to embrace these three lines with
>
> #ifdef CONFIG_DVB_USB_AF9005_REMOTE
> ...
> #endif
Luca, what do you think ?
This seems to be an ancient bug, which is known at least since 5 1/2 years:
https://lkml.org/lkml/2009/2/4/350
Well, it's been a while so I don't remember the details, but I think the
same now as then ;-)
The idea behind CONFIG_DVB_USB_AF9005_REMOTE was to provide an
alternative implementation (based on lirc, at the time it wasn't in the
kernel), since this adapter doesn't decode the IR pulses by itself.
In theory you could leave it undefined but still provide an
implementation in a different module. Just adding
#ifdef CONFIG_DVB_USB_AF9005_REMOTE
would nuke the (futile?) effort.
Now, since the problem seems to be with CONFIG_MODULES disabled, maybe
you could combine both conditions
#if defined(CONFIG_MODULE) || defined(CONFIG_DVB_USB_AF9005_REMOTE)
Bye
--
Luca
1:18 p.m.
New subject: [media/dvb_usb_af9005] BUG: unable to handle kernel paging request (WAS: [media/em28xx] BUG: unable to handle kernel)
Moikka!
On 09/19/2014 10:55 PM, Luca Olivetti wrote:
El 19/09/14 21:22, Frank Schäfer ha escrit:
>>
>> So symbol_request() returns pointers.!= NULL
>>
>> A closer look at the definition of symbol_request() shows, that it does
>> nothing if CONFIG_MODULES is disabled (it just returns its argument).
>>
>>
>> One possibility to fix this bug would be to embrace these three lines with
>>
>> #ifdef CONFIG_DVB_USB_AF9005_REMOTE
>> ...
>> #endif
> Luca, what do you think ?
>
> This seems to be an ancient bug, which is known at least since 5 1/2 years:
> https://lkml.org/lkml/2009/2/4/350
Well, it's been a while so I don't remember the details, but I think the
same now as then ;-)
The idea behind CONFIG_DVB_USB_AF9005_REMOTE was to provide an
alternative implementation (based on lirc, at the time it wasn't in the
kernel), since this adapter doesn't decode the IR pulses by itself.
In theory you could leave it undefined but still provide an
implementation in a different module. Just adding
#ifdef CONFIG_DVB_USB_AF9005_REMOTE
would nuke the (futile?) effort.
Now, since the problem seems to be with CONFIG_MODULES disabled, maybe
you could combine both conditions
#if defined(CONFIG_MODULE) || defined(CONFIG_DVB_USB_AF9005_REMOTE)
Proper fix is to remove whole home made IR decider and use common IR
decoders in kernel nowadays... And yes, that is very old driver and at
the time Luca made it there was no IR decoders nor whole remote
controller framework.
regards
Antti
--
http://palosaari.fi/
8:52 p.m.
New subject: [media/dvb_usb_af9005] BUG: unable to handle kernel paging request (WAS: [media/em28xx] BUG: unable to handle kernel)
Am 19.09.2014 um 21:55 schrieb Luca Olivetti:
El 19/09/14 21:22, Frank Schäfer ha escrit:
>> So symbol_request() returns pointers.!= NULL
>>
>> A closer look at the definition of symbol_request() shows, that it does
>> nothing if CONFIG_MODULES is disabled (it just returns its argument).
>>
>>
>> One possibility to fix this bug would be to embrace these three lines with
>>
>> #ifdef CONFIG_DVB_USB_AF9005_REMOTE
>> ...
>> #endif
> Luca, what do you think ?
>
> This seems to be an ancient bug, which is known at least since 5 1/2 years:
> https://lkml.org/lkml/2009/2/4/350
Well, it's been a while so I don't remember the details, but I think the
same now as then ;-)
The idea behind CONFIG_DVB_USB_AF9005_REMOTE was to provide an
alternative implementation (based on lirc, at the time it wasn't in the
kernel), since this adapter doesn't decode the IR pulses by itself.
In theory you could leave it undefined but still provide an
implementation in a different module. Just adding
#ifdef CONFIG_DVB_USB_AF9005_REMOTE
would nuke the (futile?) effort.
Now, since the problem seems to be with CONFIG_MODULES disabled, maybe
you could combine both conditions
#if defined(CONFIG_MODULE) || defined(CONFIG_DVB_USB_AF9005_REMOTE)
What happens,
if CONFIG_MODULES is enabled, but neither module
af9005-remote nor any other IR module is available ?
Has this ever been tested ?
Regards,
Frank
11:03 p.m.
New subject: [media/dvb_usb_af9005] BUG: unable to handle kernel paging request (WAS: [media/em28xx] BUG: unable to handle kernel)
El 23/09/14 20:52, Frank Schäfer ha escrit:
>> This seems to be an ancient bug, which is known at least
since 5 1/2 years:
>> https://lkml.org/lkml/2009/2/4/350
[...]
>
> #if defined(CONFIG_MODULE) || defined(CONFIG_DVB_USB_AF9005_REMOTE)
What happens, if CONFIG_MODULES is enabled, but neither module
af9005-remote nor any other IR module is available ?
Has this ever been tested ?
I think I tested at the time and symbol_request returned NULL in that
case, however I'm not sure and I cannot find any documentation on how
symbol_request is supposed to work in that case.
Bye
--
Luca
3:53 p.m.
New subject: [media/dvb_usb_af9005] BUG: unable to handle kernel paging request (WAS: [media/em28xx] BUG: unable to handle kernel)
Am 23.09.2014 um 23:03 schrieb Luca Olivetti:
El 23/09/14 20:52, Frank Schäfer ha escrit:
>>> This seems to be an ancient bug, which is known at least since 5 1/2 years:
>>> https://lkml.org/lkml/2009/2/4/350
[...]
>> #if defined(CONFIG_MODULE) || defined(CONFIG_DVB_USB_AF9005_REMOTE)
> What happens, if CONFIG_MODULES is enabled, but neither module
> af9005-remote nor any other IR module is available ?
> Has this ever been tested ?
I think I tested at the time and symbol_request returned NULL in that
case, however I'm not sure and I cannot find any documentation on how
symbol_request is supposed to work in that case.
Ok, thanks.
I assume noone wants to invest some time into this old driver and covert
it to todays kernel IR infrastructure as suggested by Antti ? :-)
Then I'm going to send a patch with the
#if defined(CONFIG_MODULE) || defined(CONFIG_DVB_USB_AF9005_REMOTE)
approach.
That's at least better than leaving the bug unfixed.
Regards,
Frank
5:57 p.m.
New subject: [media/dvb_usb_af9005] BUG: unable to handle kernel paging request (WAS: [media/em28xx] BUG: unable to handle kernel)
El 25/09/14 15:54, Frank Schäfer ha escrit:
Am 23.09.2014 um 23:03 schrieb Luca Olivetti:
> El 23/09/14 20:52, Frank Schäfer ha escrit:
>
>>>> This seems to be an ancient bug, which is known at least since 5 1/2
years:
>>>> https://lkml.org/lkml/2009/2/4/350
> [...]
>>> #if defined(CONFIG_MODULE) || defined(CONFIG_DVB_USB_AF9005_REMOTE)
>> What happens, if CONFIG_MODULES is enabled, but neither module
>> af9005-remote nor any other IR module is available ?
>> Has this ever been tested ?
> I think I tested at the time and symbol_request returned NULL in that
> case, however I'm not sure and I cannot find any documentation on how
> symbol_request is supposed to work in that case.
Ok, thanks.
I assume noone wants to invest some time into this old driver and covert
it to todays kernel IR infrastructure as suggested by Antti ? :-)
Not me ;-)
Then I'm going to send a patch with the
#if defined(CONFIG_MODULE) || defined(CONFIG_DVB_USB_AF9005_REMOTE)
approach.
That's at least better than leaving the bug unfixed.
Yes, it's an acceptable workaround until the bug in symbol_request is
fixed (because the bug actually is in symbol_request, isn't it?)
Bye
--
Luca
2795
days inactive
2801
days old
9 comments
4 participants
participants (4)
-
Antti Palosaari -
Fengguang Wu -
Frank Schäfer -
Luca Olivetti