On Fri, 11 Jul 2008, Julian Calaby wrote:
On Fri, Jul 11, 2008 at 07:56, Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote:
Hi
I'm getting crashes with InitIO A100u2w controller on Sparc64 (I had to fix
the endianity issues in the driver, but that's unrelated).
When I examined the crashes, it turned out that SCSI layer passed requests
with too many segments. The controller has at most 32 SG entries per
request. It sets shost->sg_tablesize to 32, but despite this, larger
requests were submitted to it --- this resulted in overwriting random memory
and crashes.
[snip]
Should this have been CC'd to linux-scsi too? This sounds like it
could be a bug at their end.
Thanks,
--
Julian Calaby
This is not a bug in scsi layer, those "nr_hw_segments" miscalculations
are hapenning in block/blk-merge.c and they can show up with any block
device driver that has small number of SG entries.
But I can CC it there, just for their information.
Mikulas
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