[gst-devel] Oops: kernel panic caused by gstv4lsrc

[Erik Walthinsen]

With an ov511 (usb webcam), I get the following oops on my 2.4.3 laptop:

Apr 24 17:37:04 omicron kernel: Unable to handle kernel NULL pointer
dereference at virtual address 00000004
Apr 24 17:37:04 omicron kernel:  printing eip:
Apr 24 17:37:04 omicron kernel: c0110e9b
Apr 24 17:37:04 omicron kernel: *pde = 00000000
Apr 24 17:37:04 omicron kernel: Oops: 0002
Apr 24 17:37:04 omicron kernel: CPU:    0
Apr 24 17:37:04 omicron kernel: EIP:    0010:[interruptible_sleep_on+43/96]
Apr 24 17:37:04 omicron kernel: EFLAGS: 00210086
Apr 24 17:37:04 omicron kernel: eax: cc8528b8   ebx: cc8528bc   ecx:
cadadd6c   edx: 00000000
Apr 24 17:37:04 omicron kernel: esi: 00200286   edi: cc852800   ebp:
cadadd7c   esp: cadadd64
Apr 24 17:37:04 omicron kernel: ds: 0018   es: 0018   ss: 0018
Apr 24 17:37:04 omicron kernel: Process lt-gstreamer-la (pid: 1056,
stackpage=cadad000)
Apr 24 17:37:04 omicron kernel: Stack: 00000000 cadac000 c01a6cf9 cb383000
ffffffff cadac000 ffffffe7 d091ad26
Apr 24 17:37:04 omicron kernel:        00200282 cb383984 00000001 00200282
00000001 cb383980 cadaded8 cb26cf22
Apr 24 17:37:04 omicron kernel:        c01a6cf9 cb383000 cadaddb4 cadaddb4
00000000 00000000 000071c6 cadac000
Apr 24 17:37:04 omicron kernel: Call Trace: [n_tty_receive_buf+2745/2800]
[<d091ad26>] [n_tty_receive_buf+2745/2800] [process_timeout+0/80]
[__insert_vm_struct+227/384] [__alloc_pages+228/720]
[remap_page_range+225/672]
Apr 24 17:37:04 omicron kernel:        [pty_write+285/304] [<d0ae3000>]
[<d091b3e4>] [insert_vm_struct+25/48] [do_mmap_pgoff+872/1056]
[old_mmap+195/256] [old_mmap+232/256] [<d091323d>]
Apr 24 17:37:04 omicron kernel:        [sys_ioctl+375/400] [system_call+51/56]
Apr 24 17:37:04 omicron kernel:
Apr 24 17:37:04 omicron kernel: Code: 89 4a 04 89 55 f0 89 5d f4 89 48 04
e8 c4 fa ff ff fa 8b 55

This is obviously something wrong with the way v4lsrc interacts with the
kernel v4l subsystem...  If I have time I'll try to trace it down some,
but I don't know the v4lsrc source well enough....

      Erik Walthinsen <omega at temple-baptist.com> - System Administrator
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