jffs2 kernel dump with 2.6.22-rc7

[shanevolpe at gmail.com]

I'm working on an embedded system which uses the PXA270 (xscale)
processor with NOR flash0.  I just updated the kernel to 2.6.22-rc7
from 2.6.20.14 (however the jffs2 was first created with 2.6.19) and
now two things are happening.
1.)  I 'm getting the following message during system boot:
            jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at
0x00c4531c: 0x0044 instead
            Further such events for this erase block will not be printed
            Old JFFS2 bitmask found at 0x00c45720
            you cannot use older JFFS2 file systems with newer kernels
2.) I'm getting a core dump when writing to the file system, I have
appended the core dump to the end of this message.
     Also it seems as if the reported blocks in issue 1, increases
every time the core dump of issue 2 happens.

This problem is very repeatable and I have recreated it on two systems now.
Regards,
Shane

**********************CORE DUMP****************************


<4>argh. node added in wrong place
<4>argh. node added in wrong place
<1>Unable to handle kernel NULL pointer dereference at virtual address 00000000
<1>pgd = c32e8000
<1> [00000000] *pgd=a3214031, *pte=00000000, *ppte=00000000
<4>Internal error: Oops: 817 [#1] PREEMPT
<4 >Modules linked in: ucb1400_ts
<4>CPU: 0    Not tainted  (2.6 .22-rc7 #16)
<4>PC is at jffs2_link_node_ref+0x20/0x1d0
<4>LR is at jffs2_add_physical_node_ref+0xb4/0x178
<4>pc : [<c01073d4> ]    lr : [<c01094e4>]    psr: 60000013
<4>sp : c32c7b98  ip : 00000000  fp : c32c7bcc
<4>r10: c06123c8  r9 : c2bf8478  r8 : c06123c8
<4>r7 : 00b7d082  r6 : c0630c00  r5 : c0596924  r4 : c0596924
<4>r3 : 000009e0  r2 : 00b7d082  r1 : c0596924  r0 : c0630c00
<4>Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  Segment user
<4>Control: 0000397f  Table: a32e8000  DAC: 00000015
<4>Process ipkg (pid: 13880, stack limit = 0xc32c6268 )
<4>Stack: (0xc32c7b98 to 0xc32c8000)
<4>7b80:                                                       c32c7c34 c246d995
<4>7ba0: c03f0bf8 00000002 c32c7c20 c32c6000 c0596924 c0630c00 00b7d082 000009e0
<4>7bc0: c32c7bfc c32c7bd0 c01094e4 c01073c0 c06123c8 c246d000 00000000 c249e528
<4>7be0: 00b7d080 00000000 00b7d080 c0630c00 c32c7c64 c32c7c00 c010c334 c010943c
<4>7c00: 00b7d080 00000000 c32c7c34 00000b18 000009dd c322d898 00000000 00000002
<4>7c20: c249e528 00000044 c246d000 00000999 c24f1000 000009dd c0107b68 00000000
<4>7c40: 00000010 00000000 00000000 00000000 c249e528 c2bf8478 c32c7cd4 c32c7c68
<4>7c60: c010cab8 c010bf98 00000999 00000003 00000000 00000099 00000000 00000000
<4>7c80: 00000070 00000006 c24f1000 c0630c00 00000000 00000000 00000999 00001000
<4>7ca0: 00002fc0 c246d000 00007000 00000000 c249e550 c249e528 c2bf84a8 c044be20
<4>7cc0: 00000000 00000000 c32c7d24 c32c7cd8 c0106b70 c010c7c8 00007000 00001000
<4>7ce0: c32c7cf4 00000007 00001000 c0630c00 00000000 00000000 c32c7d24 c02d1c20
<4>7d00: 00001000 c044be20 00001000 c03ef678 00000000 c32c6000 c32c7dcc c32c7d28
<4>7d20: c00635d4 c01069e8 00000001 c32c7ea0 00000001 00001000 c37bf660 c2bf8540
<4>7d40: c02d1c20 c2bf84a8 00000000 be8626f0 c32c7f30 00000000 c004844c 00000001
<4>7d60: 00000000 c044be20 c04d6820 c32c7da8 00000000 00007000 c32c7da4 c32c7d88
<4>7d80: c003f220 c003ea00 00000799 1f9e8785 c2be801c c2bf84a8 c32c7dcc e52c7da8
<4>7da0: c009b0a0 ffffffff c2bf84a8 00007000 00000000 00000000 00000000 00001000
<4>7dc0: c32c7e54 c32c7dd0 c0063cec c0063154 00007000 00000000 c32c7ef0 00001000
<4>7de0: 00000000 c32c7df0 c003f220 c32c7ef0 c32c7f30 c32c7ea0 c30a7848 c3483478
<4>7e00: c37bf660 c2bf8540 00000000 00000001 00000799 1f05f105 00000799 1f05f105
<4>7e20: 00000400 00001000 c32c7e94 c2bf8514 c32c7ea0 c2bf84a8 c32c7f30 00007000
<4>7e40: 00000000 00000001 c32c7e94 c32c7e58 c0063dd0 c0063820 00000001 c32c6000
<4>7e60: c37bf660 c2bf8540 00000000 c32c7ea0 c37bf660 c32c7f78 00000000 c00230a8
<4>7e80: c32c6000 00000000 c32c7f54 c32c7e98 c0084970 c0063d68 00007000 00000000
<4>7ea0: c32c7ebc c32c7eb0 00000000 00000001 ffffffff c37bf660 00000000 00000000
<4>7ec0: 00000000 00000000 c04d6820 00000817 00000000 00000000 c037dffc c04d6820
<4>7ee0: c0050070 c32c7ee4 c32c7ee4 4014e000 00007000 00000000 c0022264 c0029d3c
<4>7f00: c0075124 c0072c88 00100073 00001000 00000000 0004001f 00000000 ffffffff
<4>7f20: 000000c5 c00230a8 00000001 00000001 be8626f0 00001000 c37bf660 c37bf660
<4>7f40: be8626f0 c32c7f78 c32c7f74 c32c7f58 c00851b4 c00848cc c00539c8 c37bf660
<4>7f60: fffffff7 00007000 c32c7fa4 c32c7f78 c00856c8 c008510c 00007000 00000000
<4>7f80: 00000000 00000000 00042040 00001000 be8626f0 00000004 00000000 c32c7fa8
<4>7fa0: c0022f00 c0085690 00042040 00001000 00000006 be8626f0 00001000 00000000
<4>7fc0: 00042040 00001000 be8626f0 00000004 00001000 00000000 4014e000 00042040
<4>7fe0: 00000004 be861668 400a49f4 400e801c 60000010 00000006 00000000 00000000

<4>Backtrace:
<4> [<c01073b4>] (jffs2_link_node_ref+0x0/0x1d0) from [<c01094e4>]
(jffs2_add_physical_node_ref+0xb4/0x178)
<4> r8:000009e0 r7:00b7d082 r6:c0630c00 r5:c0596924 r4:c32c6000
<4>[<c0109430>] (jffs2_add_physical_node_ref+0x0/0x178) from
[<c010c334>] (jffs2_write_dnode+0x3a8/0x450)
<4>[<c010bf8c>] (jffs2_write_dnode+0x0/0x450) from [<c010cab8> ]
(jffs2_write_inode_range+0x2fc/0x484)
<4>[<c010c7bc> ] (jffs2_write_inode_range+0x0/0x484) from [<c0106b70>]
(jffs2_commit_write+0x194/0x2dc )
<4>[<c01069dc>] (jffs2_commit_write+0x0/0x2dc ) from [<c00635d4>]
(generic_file_buffered_write+0x48c/0x6cc)
<4>[<c0063148>] (generic_file_buffered_write+0x0/0x6cc) from [
<c0063cec>] (__generic_file_aio_write_nolock+0x4d8/0x548)
<4> [<c0063814>] (__generic_file_aio_write_nolock+0x0/0x548) from
[<c0063dd0>] (generic_file_aio_write+0x74/0xe8)
<4>[<c0063d5c>] (generic_file_aio_write+0x0/0xe8) from [<c0084970>]
(do_sync_write+0xb0/0x100)
<4>[<c00848c0>] (do_sync_write+0x0/0x100) from [<c00851b4>]
(vfs_write+0xb4/0xdc)
<4> r6:c32c7f78 r5:be8626f0 r4:c37bf660
<4>[<c0085100>] (vfs_write+0x0/0xdc) from [<c00856c8>] (sys_write+0x44/0x70)
<4> r6: 00007000 r5:fffffff7 r4:c37bf660
<4>[<c0085684>] (sys_write+0x0/0x70) from [<c0022f00>]
(ret_fast_syscall+0x0/0x2c)
<4> r7:00000004 r6:be8626f0 r5:00001000 r4:00042040
<4>Code: e591c024 e1a04001 e59b8004 e35c0000 (058cc000)
<6>note: ipkg [13880] exited with preempt_count 1
<3>BUG: scheduling while atomic: ipkg/0x40000001/ 13880
<3>BUG: scheduling while atomic: ipkg/0x40000001/13880