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SubjectRe: [PATCH] block: move sanity checking ahead of bi_front/back_seg_size updating
On Sat, Sep 16, 2017 at 07:10:30AM +0800, Jianchao Wang wrote:
> If the bio_integrity_merge_rq() return false or nr_phys_segments exceeds
> the max_segments, the merging fails, but the bi_front/back_seg_size may
> have been modified. To avoid it, move the sanity checking ahead.
> Signed-off-by: Jianchao Wang <>

This looks fine to me:

Reviewed-by: Christoph Hellwig <>

But can you elaborate a little more on how this found and if there
is a way to easily reproduce it, say for a blktests test case?

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