Recent crashes under RH 7.3 2.4.18 and ext3

[Steven Ellis <him stevencherie net>]

Ive had two of them in the last two weeks.. The most recent kernel
output is


kernel: Unable to handle kernel NULL pointer dereference at virtual
address 0000009c
kernel:  printing eip:
kernel: c88132b4
kernel: *pde = 00000000 
kernel: Oops: 0000
kernel: ppp_async ppp_generic slhc 3c509 8139too mii ipt_state ipt_LOG
ipt_REJECT ipt_ 
kernel: CPU:    0
kernel: EIP:    0010:[<c88132b4>]    Not tainted
kernel: EFLAGS: 00210286
kernel: 
kernel: EIP is at journal_blocks_per_page_Rab88fbd5 [jbd] 0x4 (2.4.18-3)
kernel: eax: 00000000   ebx: 00000000   ecx: c77b8468   edx: c162412c
kernel: esi: c162412c   edi: 00000000   ebp: 00000000   esp: c7de7f10
kernel: ds: 0018   es: 0018   ss: 0018
kernel: Process kupdated (pid: 7, stackpage=c7de7000)
kernel: Stack: c881f9b3 00000000 c0136eb8 009bfec8 c018c6e2 000000c8
c7de6000 c162412c 
kernel:        c881e12a 00000000 009bfe3d c0353d44 0000000b c7dcdec0
c018ca54 c0353d44 
kernel:        c162412c 00000004 c1624124 c7de6000 c01275aa c162412c
c1624134 c881e0c0 
kernel: Call Trace: [<c881f9b3>] ext3_writepage_trans_blocks [ext3] 0xf

Checked the mailing list archives... Any ideas?

Steve