[DRBD-user] oops on insmod drbd.ko 8.0pre6 and svn module on x86_64 system

Tamas, Gergely dice at mfa.kfki.hu
Tue Nov 14 12:07:56 CET 2006

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


I get following oops when trying to insmod drbd.ko 8.0pre6 and current

--- >>> --- >>> --- >>> ---
ksymoops 2.4.11 on x86_64  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/ (default)
     -m /boot/System.map- (default)

Warning: You did not tell me where to find symbol information.  I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc.  ksymoops -h explains the options.

Error (regular_file): read_ksyms stat /proc/ksyms failed
No modules in ksyms, skipping objects
No ksyms, skipping lsmod
Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: 
Oops: 0002 [1] SMP 
CPU 3 
Pid: 2322, comm: insmod Not tainted #1
RIP: 0010:[<ffffffff88138ecd>] <ffffffff88138ecd>{:drbd:cn_queue_add_callback+189}
Using defaults from ksymoops -t elf64-x86-64 -a i386:x86-64
RSP: 0018:ffff81012b26fec8  EFLAGS: 00010296
RAX: ffff81012e8e8000 RBX: ffffffff881413fb RCX: 0000000000000000
RDX: ffffffff80524b08 RSI: 00000000fffffffe RDI: ffff81012e779a08
RBP: ffff81012e7799c0 R08: ffffffff88141493 R09: 00000000ffffffff
R10: 000000000000000b R11: 000000000000000b R12: 0000000000000000
R13: ffffffff88135a10 R14: ffffffff881494b0 R15: 0000000000502010
FS:  00002b2a451326d0(0000) GS:ffff81012e41f140(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 000000012c67b000 CR4: 00000000000006e0
Stack: ffff81012b26ff18 0000000000502010 ffffffff881494b0 ffffffff88149580 
       00002b2a44dfb010 00007fff65cc7b8d 0000000000502010 ffffffff88138ab3 
       0000000000000296 0000000000502010 
Call Trace: <ffffffff88138ab3>{:drbd:cn_add_callback+35}
       <ffffffff880331eb>{:drbd:drbd_nl_init+27} <ffffffff88033035>{:drbd:init_module+53}
       <ffffffff80246be7>{sys_init_module+199} <ffffffff80209cca>{system_call+126}
Code: f0 41 ff 04 24 4d 8d 7c 24 40 4c 89 65 78 4c 89 ff e8 bd 62 

>>RIP; ffffffff88138ecd <_end+7c12ecd/7f0da000>   <=====

>>RAX; ffff81012e8e8000 <phys_startup_64+ffff81012e6e7f00/ffffffff7fffff00>
>>RBX; ffffffff881413fb <_end+7c1b3fb/7f0da000>
>>RDX; ffffffff80524b08 <per_cpu__tvec_bases+0/18>
>>RSI; 00000000fffffffe <phys_startup_64+ffdffefe/ffffffff7fffff00>
>>RDI; ffff81012e779a08 <phys_startup_64+ffff81012e579908/ffffffff7fffff00>
>>RBP; ffff81012e7799c0 <phys_startup_64+ffff81012e5798c0/ffffffff7fffff00>
>>R08; ffffffff88141493 <_end+7c1b493/7f0da000>
>>R09; 00000000ffffffff <phys_startup_64+ffdffeff/ffffffff7fffff00>
>>R13; ffffffff88135a10 <_end+7c0fa10/7f0da000>
>>R14; ffffffff881494b0 <_end+7c234b0/7f0da000>
>>R15; 0000000000502010 <phys_startup_64+301f10/ffffffff7fffff00>

Trace; ffffffff88138ab3 <_end+7c12ab3/7f0da000>
Trace; ffffffff880331eb <_end+7b0d1eb/7f0da000>
Trace; ffffffff80246be7 <sys_init_module+c7/200>

Code;  ffffffff88138ecd <_end+7c12ecd/7f0da000>
0000000000000000 <_RIP>:
Code;  ffffffff88138ecd <_end+7c12ecd/7f0da000>   <=====
   0:   f0 41 ff 04 24            lock incl (%r12)   <=====
Code;  ffffffff88138ed2 <_end+7c12ed2/7f0da000>
   5:   4d 8d 7c 24 40            lea    0x40(%r12),%r15
Code;  ffffffff88138ed7 <_end+7c12ed7/7f0da000>
   a:   4c 89 65 78               mov    %r12,0x78(%rbp)
Code;  ffffffff88138edb <_end+7c12edb/7f0da000>
   e:   4c 89 ff                  mov    %r15,%rdi
Code;  ffffffff88138ede <_end+7c12ede/7f0da000>
  11:   e8 bd 62 00 00            callq  62d3 <_RIP+0x62d3>

CR2: 0000000000000000

1 warning and 1 error issued.  Results may not be reliable.
--- <<< --- <<< --- <<< ---

system : ubuntu dapper
libc   : 3.3.5 (debian 1:3.3.5-13)
kernel : + arcmsr patch

Thanks in advance,

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