Adaptec driver crashes (3/3)

["Norman Diamond" <n0diamond@yahoo.co.jp>]

A tougher non-100%-reproducible way to crash a Linux system is as follows.

I don't remember exactly what I did, but for some reason I guessed it might 
happen a second time, so I set the console to a text mode terminal before it 
happened the second time (since Linux doesn't give Blue Screens of Death 
otherwise).  This is with an Adaptec 1480 card, AIC7xxx driver.

I wish I had a wooden table so I wouldn't have to read and type this stuff 
back in by hand.  (In case anyone here doesn't read thedailywtf, ignore the 
part about the wooden table.  I still wish I wouldn't have to read and type 
this stuff back in by hand.) 

BUG: unable to handle kernel NULL pointer dereference at virtual address 0000000
0
printing eip: c04a50af *pde = 00000000
Oops: 0000 [#1] SMP
Modules linked in: snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_
device snd_pcm_oss snd_mixer_oss fuse lp pcspkr snd_intel8x0 snd_ac97_codec ac97
_bus e100 snd_pcm snd_timer snd video mii iTCO_wdt soundcore serio_raw iTCO_vend
or_support output psmouse evdev pcmcia intel_agp agpgart shpchp snd_page_alloc p
arport_pc parport sg yenta_socket rsrc_nonstatic pcmcia_core aufs squashfs sqlzm
a unlzma

Pid: 3531, comm: klogs Not tainted (2.6.24.3 #1)
EIP: 0060:[<c04a50af>] EFLAGS: 00010046 CPU: 0
EIP is at ahc_handle_scsiint+0xdbf/0xef0
EAX: 00000000 EBX: 00000007 ECX: 00000001 EDX: 0000000d
ESI: ede17e00 EDI: 00000000 EBP: 00000000 ESP: ed507de4
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process klogd (pid: 3531, ti=ed506000 task=edd6aaa0 task.ti=ed506000)
Stack: 00000001 00000041 00000001 ee6a6580 d662d853 41410000 000000a0 ead93024
       c01806db 00a0ee08 00000041 00000007 00000000 00000001 00000000 00000000
       ed53b541 00000001 ede17e00 00000064 00000082 0000000b c04b20f9 ede0cd60
Call Trace:
 [<c01806db>] __link_path_walk+0xaab/0xe10
 [<c04b20f9>] ahc_linux_isr+0x1e9/0x260
 [<c0151025>] handle_IRQ_event+0x25/0x50
 [<c01529bc>] handle_level_irq+0x7c/0xf0
 [<c010748b>] do_IRQ+0x3b/0x70
 [<efbe3d90>] aufs_getattr+0x0/0xa0 [aufs]
 [<c01052d3>] common_interrupt+0x23/0x30
 [<efbe3d90>] aufs_getattr+0x0/0xa0 [aufs]
 [<efbe3d9e>] aufs_getattr+0xe/0xa0 [aufs]
 [<c017fa47>] getname+0xa7/0xc0
 [<c03b7acf>] security_inode_getattr+0x1f/0x30
 [<c017a4f8>] vfs_getattr+0x48/0x70
 [<c017a727>] vfs_stat_fd+0x37/0x60
 [<c017a82f>] sys_stat64+0xf/0x30
 [<c01775ee>] vfs_write+0x11e/0x140
 [<c0177c31>] sys_write+0x41/0x70
 [<c012cc1a>] sys_time+0xa/0x30
 [<c0104352>] syscall_call+0x7/0xb
 [<c0700000>] rpcb_getport_prepare+0x10/0x40
 =======================
Code: 24 2c e8 c5 95 ff ff b9 14 00 00 00 89 f0 8d 54 24 2c c7 44 24 04 00 00 00
 00 c7 04 24 b6 d1 80 c0 e8 56 e9 ff ff e9 8d f8 ff ff <8b> 07 89 fa 0f b6 58 1b
 0f b6 c3 89 44 24 1c 89 f0 e8 5b a5 00
EIP: [<c04a50af>] ahc_handle_scsiint+0xdbf/0xef0 SS:ESP 0068:ed507de4
Kernel panic - not syncing : Fatal exception in interrupt
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