Re: [next-20260108]kernel BUG at drivers/scsi/scsi_lib.c:1173!

[Venkat Rao Bagalkote <venkat88@linux.ibm.com>]

On 09/01/26 12:19 pm, Ming Lei wrote:
> On Thu, Jan 08, 2026 at 09:56:39PM -0800, Christoph Hellwig wrote:
>> I've seen the same when running xfstests on xfs, and bisected it to:
>>
>> commit ee623c892aa59003fca173de0041abc2ccc2c72d
>> Author: Ming Lei <ming.lei@redhat.com>
>> Date:   Wed Dec 31 11:00:55 2025 +0800
>>
>>      block: use bvec iterator helper for bio_may_need_split()
>>
> Hi Christoph and Venkat Rao Bagalkote,
>
> Unfortunately I can't duplicate the issue in my environment, can you test
> the following patch?
>
> diff --git a/block/blk.h b/block/blk.h
> index 98f4dfd4ec75..980eef1f5690 100644
> --- a/block/blk.h
> +++ b/block/blk.h
> @@ -380,7 +380,7 @@ static inline bool bio_may_need_split(struct bio *bio,
>                  return true;
>   
>          bv = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter);
> -       if (bio->bi_iter.bi_size > bv->bv_len)
> +       if (bio->bi_iter.bi_size > bv->bv_len - bio->bi_iter.bi_bvec_done)
>                  return true;
>          return bv->bv_len + bv->bv_offset > lim->max_fast_segment_size;
>   }

Hello Ming,


This is not helping. I am hitting this issue, during kernel build itself.


Regards,

Venkat.

>
> Thanks,
> Ming
>
>