panic in reiserfs on test-2.4.0-test9/10

Hi,

I tried the linux-2.4.0-test9-resiserfs-3.6.18-patch on both 2.4.0-test9 and test2.4.0-test10
and got the following PANIC I originally saw this PANIC when doing a 'cp -a / /reiserfs'.
I narrowed it done to a simple symlink ....

Andy

[root@client19 /reiserfs]# ln -s foo.tar foo

Unable to handle kernel NULL pointer dereference at virtual address

00000010
printing eip:
c0185953
*pde = 00000000

Oops: 0000
CPU:    0
EIP:    0010:[<c0185953>]
EFLAGS: 00010296
eax: c12a017c   ebx: c12a0060   ecx: 0000000f   edx: 00000000
esi: c12a0090   edi: c12a0000   ebp: 00000005   esp: c0c01b60
ds: 0018   es: 0018   ss: 0018
Process ln (pid: 928, stackpage=c0c01000)
Stack: c12a0078 c12a017c c0c01bf8 00000001 00000000 c0c01be0 c0178dc4
c058dc00
       c0c01ba4 c0c01b8c 00000000 c0182728 c0182736 00000001 00000130
00000000
       00000000 c0c01c40 00000001 00000000 c0c01c28 c0c01bfc 00000000
00000000
Call Trace: [<c0178dc4>] [<c0182728>] [<c0182736>] [<c018ede7>]
[<c017d3a3>] [<c017d842>] [<c017a5f2>]
       [<c0230f99>] [<c0239e3a>] [<c0139892>] [<c0139951>] [<c010a717>]
Code: 8b 52 10 ff d2 5b 5f 8b 54 24 14 8b 42 34 89 c7 0f b7 47 02

Segmentation fault

ksymoops 2.3.4 on i686 2.4.0-test9. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.0-test9/ (default)
-m /boot/System.map-test9 (specified)

No modules in ksyms, skipping objects
Warning (read_lsmod): no symbols in lsmod, is /proc/modules a valid lsmod file?

Unable to handle kernel NULL pointer dereference at virtual address
00000010
c0185953
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c0185953>]

Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010296
eax: c12a017c ebx: c12a0060 ecx: 0000000f edx: 00000000
esi: c12a0090 edi: c12a0000 ebp: 00000005 esp: c0c01b60
ds: 0018 es: 0018 ss: 0018
Process ln (pid: 928, stackpage=c0c01000)

Stack: c12a0078 c12a017c c0c01bf8 00000001 00000000 c0c01be0 c0178dc4
c058dc00
       c0c01ba4 c0c01b8c 00000000 c0182728 c0182736 00000001 00000130
00000000
       00000000 c0c01c40 00000001 00000000 c0c01c28 c0c01bfc 00000000
00000000
Call Trace: [<c0178dc4>] [<c0182728>] [<c0182736>] [<c018ede7>]
[<c017d3a3>] [<c017d842>] [<c017a5f2>]
       [<c0230f99>] [<c0239e3a>] [<c0139892>] [<c0139951>] [<c010a717>]
Code: 8b 52 10 ff d2 5b 5f 8b 54 24 14 8b 42 34 89 c7 0f b7 47 02

Trace; c0178dc4 <do_balance+114/140>
Trace; c0182728 <fix_nodes+348/540>
Trace; c0182736 <fix_nodes+356/540>
Trace; c018ede7 <reiserfs_insert_item+a7/110>
Trace; c017d3a3 <reiserfs_new_symlink+e3/f0>
Trace; c017d842 <reiserfs_new_inode+492/500>
Trace; c017a5f2 <reiserfs_symlink+122/220>
Trace; c0230f99 <tvecs+193c9/27ed0>
Trace; c0239e3a <tvecs+2226a/27ed0>
Trace; c0139892 <vfs_symlink+62/a0>
Trace; c0139951 <sys_symlink+81/d0>
Trace; c010a717 <system_call+33/38>
Code; c0185953 <check_leaf+a3/c0>
00000000 <_EIP>:
Code; c0185953 <check_leaf+a3/c0> <=====
0: 8b 52 10 mov 0x10(%edx),%edx <=====
Code; c0185956 <check_leaf+a6/c0>
3: ff d2 call *%edx
Code; c0185958 <check_leaf+a8/c0>
5: 5b pop %ebx
Code; c0185959 <check_leaf+a9/c0>
6: 5f pop %edi
Code; c018595a <check_leaf+aa/c0>
7: 8b 54 24 14 mov 0x14(%esp,1),%edx
Code; c018595e <check_leaf+ae/c0>
b: 8b 42 34 mov 0x34(%edx),%eax
Code; c0185961 <check_leaf+b1/c0>
e: 89 c7 mov %eax,%edi
Code; c0185963 <check_leaf+b3/c0>
10: 0f b7 47 02 movzwl 0x2(%edi),%eax

1 warning issued. Results may not be reliable.

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We'll try to reproduce this when the guys get in for work this morning, thanks for the bug report.

Elena, add symlink testing to mongo.sh so that it gets tested by our regression tests.

Hans

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