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SubjectRe: [RFC PATCH V3 1/2] null_blk: Null pointer deference problem in alloc_page_buffers
On Tue, Jan 21 2014, Raghavendra K T wrote:
> If we load the null_blk module with bs=8k we get following oops:
> [ 3819.812190] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
> [ 3819.812387] IP: [<ffffffff81170aa5>] create_empty_buffers+0x28/0xaf
> [ 3819.812527] PGD 219244067 PUD 215a06067 PMD 0
> [ 3819.812640] Oops: 0000 [#1] SMP
> [ 3819.812772] Modules linked in: null_blk(+)
>
> Fix that by resetting block size to PAGE_SIZE if it is greater than PAGE_SIZE

Thanks, applied.

--
Jens Axboe



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