Re: BUG: in 2.6.23-rc3-git7 in do_cciss_intr

[Andrew Morton <akpm@linux-foundation.org>]

On Wed, 20 Aug 2008 22:52:50 -0700 rdunlap <randy.dunlap@oracle.com> wrote:

> on x86_64, 4 proc, 8 GB RAM:
> 
> calling  cciss_init+0x0/0x2e [cciss]
> HP CISS Driver (v 3.6.20)
> ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 54
> cciss 0000:42:08.0: PCI INT A -> Link[LNKA] -> GSI 54 (level, high) -> IRQ 54
> cciss0: <0x3238> at PCI 0000:42:08.0 IRQ 503 using DAC
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000248
> IP: [<ffffffffa001bb68>] do_cciss_intr+0x627/0xa6c [cciss]
> PGD 17e422067 PUD 17e423067 PMD 0
> Oops: 0002 [1] SMP
> CPU 2
> Modules linked in: cciss(+) ehci_hcd ohci_hcd uhci_hcd
> Pid: 0, comm: swapper Not tainted 2.6.27-rc3-git7 #1
> RIP: 0010:[<ffffffffa001bb68>]  [<ffffffffa001bb68>] do_cciss_intr+0x627/0xa6c [cciss]
> RSP: 0018:ffff88027f66fee8  EFLAGS: 00010007
> RAX: 0000000000000000 RBX: ffff88007f840270 RCX: 000000000000000c
> RDX: 0000000000000000 RSI: ffff88027e5c0000 RDI: ffff88027e5c0000
> RBP: ffff88027f66ff18 R08: 0000000000000000 R09: ffff88017fa95e88
> R10: 0000000000000000 R11: ffff88027f66ff48 R12: ffff88027e5c0000
> R13: 0000000000000000 R14: 00000000000001f7 R15: 0000000000000086
> FS:  0000000000680850(0000) GS:ffff88017fc02c80(0000) knlGS:0000000000000000
> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 0000000000000248 CR3: 000000017e425000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process swapper (pid: 0, threadinfo ffff88017fa94000, task ffff88027f63d340)
> Stack:  ffff88027f66fee0 ffff88017e9b4800 0000000000000000 0000000000000000
>  00000000000001f7 0000000000000000 ffff88027f66ff48 ffffffff8026757e
>  ffffffff80719000 00000000000001f7 ffff88017e9b4800 ffffffff80719050
> Call Trace:
>  <IRQ>  [<ffffffff8026757e>] handle_IRQ_event+0x27/0x57
>  [<ffffffff80268d08>] handle_edge_irq+0xed/0x12e
>  [<ffffffff8020eaab>] do_IRQ+0xf6/0x167
>  [<ffffffff8020c471>] ret_from_intr+0x0/0xa
>  <EOI>  [<ffffffff802122b1>] ? default_idle+0x2b/0x40
>  [<ffffffff802124bf>] ? c1e_idle+0xd4/0xdb
>  [<ffffffff8055677d>] ? atomic_notifier_call_chain+0xf/0x11
>  [<ffffffff8020ac6c>] ? cpu_idle+0x71/0x8f
>  [<ffffffff8054e752>] ? start_secondary+0x157/0x15c
> 
> 
> Code: 8b 83 48 02 00 00 48 39 d8 74 37 49 39 9c 24 c0 00 01 00 75 08 49 89 84 24 c0 00 01 00 48 8b 83 40 02 00 00 48 8b 93 48 02 00 00 <48> 89 90 48 02 00 00 48 8b 93 48 02 00 00 48 89 82 40 02 00 00
> RIP  [<ffffffffa001bb68>] do_cciss_intr+0x627/0xa6c [cciss]
>  RSP <ffff88027f66fee8>
> CR2: 0000000000000248

Is it repeatable?

Is it a regression?

Any chance of finding the offending code with gdb?