Hi,
On Fri, Jul 28, 2006 at 07:39:50PM -0400, Dave Jones wrote:
> 2.6.18-rc2-git6
>
> BUG: unable to handle kernel NULL pointer dereference at 00000000
> EIP is at make_class_name+0x27
> eax: 00000000 ebx: ffffffff ecx: ffffffff edx: 00000009
> esi: f8d16cc2 edi: 00000000 ebp: f7fa9d3c esp: f7fa9d2c
>
> Call Trace:
> class_device_del+0xac
> class_device_unregister
> scsi_remove_host
> ata_host_remove
> ata_device_add
I think the problem lays in scsi/libata-core.c:5423 in
torvalds/linux-2.6 v2.6.18-rc2-g6482132, stating:
[...]
struct ata_host_set *host_set = kzalloc(...);
[...]
Initialization of some structure members, but not ports(!)
for (...) {
struct ata_port *ap;
ap = ata_host_add(ent, host_set, i);
if (!ap)
goto err_out;
host_set->ports[i] = ap;
err_out:
for (i = 0; i < count; i++) {
ata_host_remove(host_set->ports[i], 1);
[...]
ata_device_add fails, calls ata_host_remove with pointers to unitialized
memory.
Hannes
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