2.6.20-mm2: Oops in generic_make_request not git-block.patches fault

[Oliver Pahl]

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Hash: SHA1

I rebuild the kernel, without the git-block patches Patches

revert-md-avoid-possible-bug_on-in-md-bitmap-handling-for-git-block.patch
git-block.patch
git-block-fixup.patch
git-block-dupe-definitions.patch
git-block-xfs-barriers-broke.patch

but i still get:

BUG: unable to handle kernel NULL pointer dereference at virtual
address 0000000
4
 printing eip:
c01f369b
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
last sysfs file:
/devices/pci0000:00/0000:00:1d.3/usb5/5-0:1.0/bInterfaceProtoco
l
Modules linked in: fglrx(P) arc4 ecb blkcipher cryptomgr
crypto_algapi ieee80211
_crypt_wep ipw2200 ieee80211 ieee80211_crypt sk98lin intel_agp
agpgart
CPU:    0
EIP:    0060:[<c01f369b>]    Tainted: P       VLI
EFLAGS: 00210297   (2.6.20-tEwaN1 #4)
EIP is at __make_request+0xeb/0x2d7
eax: ffffffff   ebx: 00000000   ecx: 00000000   edx: 00010585
esi: dff497d4   edi: c1974d54   ebp: c1947200   esp: ec6b1b1c
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process firefox-bin (pid: 10937, ti=ec6b0000 task=c1938540
task.ti=ec6b0000)
Stack: 00000000 c1947200 dff4c494 00000008 00000100 c1947200
dff497d4 c01f1778
       ef4c15c0 00672810 00000000 ef07c9a0 00000008 ef7de6b8
00000000 c1948d8c
       00200202 00000000 c192dc00 000112d0 00200202 c017c700
00000001 c1947200
Call Trace:
 [<c01f1778>] generic_make_request+0x18d/0x1bb
 [<c017c700>] do_mpage_readpage+0x44e/0x454
 [<c01f343e>] submit_bio+0xc3/0xca
 [<c0192124>] ext3_get_block+0xa8/0xbe
 [<c017c75b>] mpage_end_io_read+0x0/0x61
 [<c017bd81>] mpage_bio_submit+0x19/0x1d
 [<c017c5fe>] do_mpage_readpage+0x34c/0x454
 [<c0179168>] bio_add_page+0x31/0x37
 [<c019207c>] ext3_get_block+0x0/0xbe
 [<c013e2b9>] add_to_page_cache+0x37/0xa7
 [<c017c8d1>] mpage_readpages+0xb2/0x119
 [<c019207c>] ext3_get_block+0x0/0xbe
 [<c02781d4>] ata_qc_issue_prot+0xfe/0x234
 [<c0275255>] ata_qc_issue+0x43b/0x48d
 [<c02795ca>] ata_scsi_rw_xlat+0x126/0x19c
 [<c01915f4>] ext3_readpages+0x0/0x15
 [<c0144143>] __do_page_cache_readahead+0x16a/0x237
 [<c019207c>] ext3_get_block+0x0/0xbe
 [<c026bce9>] scsi_prep_fn+0x1b5/0x227
 [<c01fbdfb>] radix_tree_scan_hole_backward+0x17/0x2d
 [<c0144799>] try_context_based_readahead+0x307/0x336
 [<c0102dbc>] __switch_to+0x161/0x17b
 [<c01442c9>] ra_submit+0xb9/0xc5
 [<c0144a9b>] page_cache_readahead_adaptive+0x2d3/0x4a4
 [<c036552a>] io_schedule+0x4e/0x57
 [<c013e066>] file_read_actor+0x79/0xca
 [<c013e7f8>] do_generic_mapping_read+0x1a4/0x4f3
 [<c01409ad>] generic_file_aio_read+0x1af/0x1f6
 [<c013dfed>] file_read_actor+0x0/0xca
 [<c01efb84>] elv_next_request+0x105/0x114
 [<c015af8f>] do_sync_read+0xc7/0x10a
 [<c026b50c>] scsi_next_command+0x25/0x2f
 [<c0128560>] wake_bit_function+0x0/0x44
 [<c015defe>] sys_fstat64+0x1e/0x23
 [<c015aec8>] do_sync_read+0x0/0x10a
 [<c015b6f2>] vfs_read+0x88/0x10a
 [<c015ba3a>] sys_read+0x41/0x67
 [<c0103cce>] sysenter_past_esp+0x5f/0x85
 [<c0360000>] inet6_synq_hash+0xe0/0xf5
 =======================
Code: 83 f8 02 75 0d 89 e9 89 da 89 f0 e8 82 ec ff ff eb 0e 48 75 13 89
e9 89 da
 89 f0 e8 f0 e9 ff ff 85 c0 0f 85 e5 01 00 00 8b 5b 04 <8b> 43 04 0f 18
00 90 8d
 47 14 39 c3 75 be fa 89 e0 25 00 e0 ff
EIP: [<c01f369b>] __make_request+0xeb/0x2d7 SS:ESP 0068:ec6b1b1c

Ths time i had to wait a few hours till the Bug jumped on. I am trying
to make a bisection search, without the patches,
but i am not that experienced.

HTH

Oli

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