Re: oops from my test driver at poll_wait (__pollwait from select.c)

[Shivu V]

And the Kernel version is : 2.4.18-14

-Shivu

--- Shivu V <shivu_sv2004@xxxxxxxxx> wrote:
> Hello,
> 
> I am a newbie in driver development. In one of my
> test
> driver, I am getting the oops at poll_wait.  The
> ksymoops o/p is as follows :
> 
> Unable to handle kernel NULL pointer dereference at
> virtual address 00000005
> c01190f5
> *pde = 00000000
> Oops: 0002
> CPU:    0
> EIP:    0010:[<c01190f5>]    Not tainted
> Using defaults from ksymoops -t elf32-i386 -a i386
> EFLAGS: 00010046
> eax: f7ae0f18   ebx: 00000001   ecx: f6d40014   edx:
> f6d4000c
> esi: 00000246   edi: 00000000   ebp: f6d47ef4   esp:
> f6d47ec0
> ds: 0018   es: 0018   ss: 0018
> Process test (pid: 1228, stackpage=f6d47000)
> Stack: f72b3520 f7ae0e80 f8e144c6 f6d8f0e0 f7ae0f18
> f6d47fa8 f6d47f04 00000000
>       c012bee9 f6f513c0 f6d8f0e0 00000000 f6d47fa8
> f6d47f24 f8e14987 f6d8f0e0
>       f6d47fa8 420d2220 f6d93900 c01169f8 00000212
> 00001000 00000145 f6d41000
> Call Trace: [<f8e144c6>] daemon_poll [mytest] 0x78
> (0xf6d47ec8))
> [<c012bee9>] handle_mm_fault [kernel] 0x89
> (0xf6d47ee0))
> [<f8e14987>] mytest_poll [mytest] 0x6d (0xf6d47ef8))
> [<c01169f8>] do_page_fault [kernel] 0x138
> (0xf6d47f0c))
> [<c0150255>] do_pollfd [kernel] 0x95 (0xf6d47f28))
> [<c015035f>] do_pollfd [kernel] 0x19f (0xf6d47f44))
> [<c01504d3>] sys_poll [kernel] 0x163 (0xf6d47f78))
> [<c010910f>] system_call [kernel] 0x33 (0xf6d47fc0))
> Code: 89 4b 04 89 5a 08 89 41 04 89 08 56 9d 8b 1c
> 24
> 8b 74 24 04
> 
> 
> >>EIP; c01190f5 <add_wait_queue+15/30>   <=====
> 
> >>eax; f7ae0f18 <_end+3770f398/384564e0>
> >>ecx; f6d40014 <_end+3696e494/384564e0>
> >>edx; f6d4000c <_end+3696e48c/384564e0>
> >>ebp; f6d47ef4 <_end+36976374/384564e0>
> >>esp; f6d47ec0 <_end+36976340/384564e0>
> 
> Trace; f8e144c6 <[mytest]daemon_poll+78/d6>
> Trace; c012bee9 <handle_mm_fault+89/160>
> Trace; f8e14987 <[mytest]mytest_poll+6d/96>
> Trace; c01169f8 <do_page_fault+138/4cf>
> Trace; c0150255 <do_pollfd+95/a0>
> Trace; c015035f <do_poll+ff/110>
> Trace; c01504d3 <sys_poll+163/300>
> Trace; c010910f <system_call+33/38>
> 
> Code;  c01190f5 <add_wait_queue+15/30>
> 00000000 <_EIP>:
> Code;  c01190f5 <add_wait_queue+15/30>   <=====
>   0:   89 4b 04                  mov   
> %ecx,0x4(%ebx)
>   <=====
> Code;  c01190f8 <add_wait_queue+18/30>
>   3:   89 5a 08                  mov   
> %ebx,0x8(%edx)
> Code;  c01190fb <add_wait_queue+1b/30>
>   6:   89 41 04                  mov   
> %eax,0x4(%ecx)
> Code;  c01190fe <add_wait_queue+1e/30>
>   9:   89 08                     mov    %ecx,(%eax)
> Code;  c0119100 <add_wait_queue+20/30>
>   b:   56                        push   %esi
> Code;  c0119101 <add_wait_queue+21/30>
>   c:   9d                        popf  Code; 
> c0119102
> <add_wait_queue+22/30>
>   d:   8b 1c 24                  mov   
> (%esp,1),%ebx
> Code;  c0119105 <add_wait_queue+25/30>
>  10:   8b 74 24 04               mov   
> 0x4(%esp,1),%esi
> 
> 
> 2 warnings and 5 errors issued.  Results may not be
> reliable. 
> 
> 
> 
> Any ideas ??
> 
> Thanks
> -Shivu
> 
> __________________________________
> Do you Yahoo!?
> Find out what made the Top Yahoo! Searches of 2003
> http://search.yahoo.com/top2003
> 


__________________________________
Do you Yahoo!?
Find out what made the Top Yahoo! Searches of 2003
http://search.yahoo.com/top2003
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/