Messages in this thread Patch in this message | | | Date | Wed, 18 Sep 2002 16:01:53 -0700 (PDT) | From | Patrick Mochel <> | Subject | Re: linux-2.5.36 Oops on power-down |
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> Unable to handle kernel NULL pointer dereference at virtual address 00000000 > 00000000 > *pde = 00000000 > Oops: 0000 > CPU: 0 > EIP: 0060: [<00000000>] Not tainted > Using defaults from ksymoops -t elf32-i386 -a i386 > EFLAGS: 00010246 > eax: c034f808 ebx: 00000008 ecx: c034f4e0 edx: c034f4e0 > esi: c11978a0 edi: c11ed800 ebp: c034f808 esp: c362be68 > ds: 0068 es: 0068 ss: 0068 > Stack: c019b8bd c11ed800 c034f808 00000000 c11ed850 c11ed850 c11ed450 > bffffd18 > c0194db9 c11ed800 c11ed850 c019fc7d c11ed850 01234567 c362a000 > fee1dead > c01228fb c03d7128 00000001 00000000 c139da80 00000000 00000000 > c222f464 > Call Trace: [<c019b8bd>] [<c0194db9>] [<c019fc7d>] [<c01228fb>] [<c01515ae>] > [<c01513e2>] [<c014fb6c>] [<c013d91d>] [<c013bee9>] [<c013bf5d>] > [<c0107493>] > Code: Bad EIP value. > > >>EIP; 00000000 Before first symbol > Trace; c019b8bd <pci_remove_one+3d/60> > Trace; c0194db9 <pci_device_remove+19/30> > Trace; c019fc7d <device_shutdown+4d/7e> > Trace; c01228fb <sys_reboot+fb/280> > Trace; c01515ae <clear_inode+e/b0> > Trace; c01513e2 <destroy_inode+32/50> > Trace; c014fb6c <dput+1c/160> > Trace; c013d91d <__fput+bd/e0> > Trace; c013bee9 <filp_close+99/b0> > Trace; c013bf5d <sys_close+5d/70> > Trace; c0107493 <syscall_call+7/b>
It appears that the 8250_pci serial driver needs a check for NULL when calling the device's re-init function. Could you try the attached patch and let us know if it works for you?
Thanks,
-pat
===== drivers/serial/8250_pci.c 1.8 vs edited ===== --- 1.8/drivers/serial/8250_pci.c Mon Jul 29 07:52:41 2002 +++ edited/drivers/serial/8250_pci.c Wed Sep 18 15:51:32 2002 @@ -771,7 +771,8 @@ for (i = 0; i < priv->nr; i++) unregister_serial(priv->line[i]); - priv->board->init_fn(dev, priv->board, 0); + if (priv->board->init_fn) + priv->board->init_fn(dev, priv->board, 0); pci_disable_device(dev); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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