Messages in this thread | | | Date | Sun, 4 Jan 2004 14:05:37 -0800 (PST) | From | Shivu V <> | Subject | oops from my test driver at poll_wait (__pollwait from select.c) |
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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
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