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d48de1c73b
linux-next/drivers/media/usb/gspca
History
Antonio Ospite d48de1c73b [media] gspca-ov534: don't call sd_start() from sd_init() 
sd_start() operates on device controls but after the conversion to the
v4l2 control framework in commits 62bba5d and 1bd7d6a controls are
initialized in sd_init_controls() which is called _after_ sd_init():
The change fixes a NULL pointer dereference for Hercules Blog Webcam;
the problem is observable since 3.6:
  gspca_main: v2.14.0 registered
  gspca_main: ov534-2.14.0 probing 06f8:3002
  BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
  IP: [<ffffffffa03c1b01>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
  PGD 0
  Oops: 0000 [#1] SMP
  Modules linked in: gspca_ov534(+) gspca_main videodev rfcomm bnep ppdev bluetooth binfmt_misc snd_hda_codec_hdmi snd_hda_codec_realtek stir4200 irda crc_ccitt usblp snd_hda_intel snd_hda_codec snd_hwdep snd_pcm hid_generic snd_page_alloc snd_seq_midi snd_seq_midi_event usbhid snd_rawmidi snd_seq snd_seq_device snd_timer hid i915 snd psmouse drm_kms_helper serio_raw mei_me drm mei soundcore video i2c_algo_bit lpc_ich mac_hid coretemp lp parport firewire_ohci firewire_core crc_itu_t ahci libahci alx mdio r8169 mii [last unloaded: parport_pc]
  CPU: 3 PID: 4352 Comm: modprobe Not tainted 3.11.0-031100rc2-generic #201307211535
  Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Z77-DS3H, BIOS F9 09/19/2012
  task: ffff8801c20f9770 ti: ffff8801ceaa0000 task.ti: ffff8801ceaa0000
  RIP: 0010:[<ffffffffa03c1b01>]  [<ffffffffa03c1b01>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
  RSP: 0018:ffff8801ceaa1af8  EFLAGS: 00010292
  RAX: 0000000000000001 RBX: 0000000000000000 RCX: 000000000001988b
  RDX: 000000000001988a RSI: ffffffffa032745a RDI: 0000000000000000
  RBP: ffff8801ceaa1b28 R08: 0000000000017380 R09: ffffea0008419d80
  R10: ffffffff81538f5a R11: 0000000000000002 R12: ffffffffa03273dc
  R13: ffffffffa03273dc R14: 0000000000000000 R15: ffffffffa03270a0
  FS:  00007f72d564a740(0000) GS:ffff88021f380000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000000000050 CR3: 00000001bd1f0000 CR4: 00000000001407e0
  Stack:
   ffff8801ceaa1b28 ffffffffa0325cff ffff8801000001f4 ffff8801ceb44000
   ffffffffa03273dc ffff8801ceb44000 ffff8801ceaa1b58 ffffffffa032688e
   ffff8801ceb44000 ffffffffa03274f0 ffffffffa03274f0 ffff8801ceb44380
  Call Trace:
   [<ffffffffa0325cff>] ? sccb_w_array+0x3f/0x80 [gspca_ov534]
   [<ffffffffa032688e>] sd_start+0xce/0x2b0 [gspca_ov534]
   [<ffffffffa0326bf9>] sd_init+0x189/0x1e8 [gspca_ov534]
   [<ffffffffa02a0c95>] gspca_dev_probe2+0x285/0x410 [gspca_main]
   [<ffffffffa02a0e58>] gspca_dev_probe+0x38/0x60 [gspca_main]
   [<ffffffffa0325081>] sd_probe+0x21/0x30 [gspca_ov534]
   [<ffffffff8153c960>] usb_probe_interface+0x1c0/0x2f0
   [<ffffffff8148758c>] really_probe+0x6c/0x330
   [<ffffffff814879d7>] driver_probe_device+0x47/0xa0
   [<ffffffff81487adb>] __driver_attach+0xab/0xb0
   [<ffffffff81487a30>] ? driver_probe_device+0xa0/0xa0
   [<ffffffff814857be>] bus_for_each_dev+0x5e/0x90
   [<ffffffff8148714e>] driver_attach+0x1e/0x20
   [<ffffffff81486bdc>] bus_add_driver+0x10c/0x290
   [<ffffffff8148805d>] driver_register+0x7d/0x160
   [<ffffffff8153b590>] usb_register_driver+0xa0/0x160
   [<ffffffffa0067000>] ? 0xffffffffa0066fff
   [<ffffffffa006701e>] sd_driver_init+0x1e/0x1000 [gspca_ov534]
   [<ffffffff8100212a>] do_one_initcall+0xfa/0x1b0
   [<ffffffff810578c3>] ? set_memory_nx+0x43/0x50
   [<ffffffff81712e8d>] do_init_module+0x80/0x1d1
   [<ffffffff810d2079>] load_module+0x4c9/0x5f0
   [<ffffffff810cf7b0>] ? add_kallsyms+0x210/0x210
   [<ffffffff810d2254>] SyS_init_module+0xb4/0x100
   [<ffffffff817333ef>] tracesys+0xe1/0xe6
  Code: a0 09 00 00 48 c7 c7 30 c3 3c a0 e8 7a 38 ca e0 eb cf 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 83 ec 28 <8b> 47 50 83 e8 05 83 f8 02 77 09 80 b8 20 8c 3c a0 00 74 1d 48
  RIP  [<ffffffffa03c1b01>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
   RSP <ffff8801ceaa1af8>
  CR2: 0000000000000050
  ---[ end trace 6786f15abfd2ac90 ]---
Original bug report from:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1173723/

Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Tested-by: Yaroslav Zakharuk <slavikz@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2013-08-21 05:19:47 -03:00
..
gl860 [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
m5602 [media] m5602_ov7660: return error at ov7660_init() 2013-03-22 09:46:48 -03:00
stv06xx [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
autogain_functions.c
benq.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
conex.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
cpia1.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
etoms.c [media] gspca: remove obsolete Kconfig macros 2013-03-29 08:19:26 -03:00
finepix.c [media] gspca: Update / fix various comments wrt workqueue usb_lock usage 2012-09-13 17:52:58 -03:00
gspca.c [media] gspca: fix dev_open() error path 2013-08-21 05:18:31 -03:00
gspca.h [media] gspca: remove g_chip_ident 2013-06-17 08:45:00 -03:00
jeilinj.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
jl2005bcd.c [media] gspca: Use module_usb_driver macro 2012-12-21 13:37:11 -02:00
jpeg.h
Kconfig
kinect.c [media] gspca_kinect: add Kinect for Windows USB id 2012-12-21 21:26:36 -02:00
konica.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
Makefile
mars.c
mr97310a.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
nw80x.c
ov519.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
ov534_9.c
ov534.c [media] gspca-ov534: don't call sd_start() from sd_init() 2013-08-21 05:19:47 -03:00
pac207.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
pac7302.c [media] gspca: remove g_chip_ident 2013-06-17 08:45:00 -03:00
pac7311.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
pac_common.h [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
se401.c [media] usb/gspca/se401.c: use IS_ENABLED() macro 2013-02-05 14:54:10 -02:00
se401.h
sn9c20x.c [media] sn9c20x: the reg->size field wasn't filled in 2013-06-17 08:55:34 -03:00
sn9c2028.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
sn9c2028.h
sonixb.c [media] gspca-sonixb: Adjust hstart on sn9c103 + pas202 2013-05-07 09:41:49 -03:00
sonixj.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
spca500.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
spca501.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
spca505.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
spca506.c Drivers: media: remove __dev* attributes. 2013-01-03 15:57:02 -08:00
spca508.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
spca561.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
spca1528.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
sq905.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
sq905c.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
sq930x.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
stk014.c
stv0680.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
sunplus.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
t613.c [media] usb/gspca/t613.c: use IS_ENABLED() macro 2013-02-05 14:54:37 -02:00
topro.c [media] v4l2: make vidioc_s_jpegcomp const 2012-09-26 10:43:04 -03:00
tv8532.c
vc032x.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
vicam.c [media] gspca: Update / fix various comments wrt workqueue usb_lock usage 2012-09-13 17:52:58 -03:00
w996Xcf.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00
xirlink_cit.c [media] usb/gspca/xirlink_cit.c: use IS_ENABLED() macro 2013-02-05 14:54:40 -02:00
zc3xx-reg.h
zc3xx.c [media] gspca: Remove gspca-specific debug magic 2013-03-05 15:13:48 -03:00