Re: [PATCH RESEND 0/3] Fix length calculation bug in extract_kvec_to_sg

[Josh Law]

On 24 March 2026 00:03:23 GMT, Josh Law <objecting@xxxxxxxxxxxxx> wrote:
>On Mon, 23 Mar 2026 22:23:47 +0100, Christian A. Ehrhardt wrote:
>> There is a bug in extract_kvec_to_sg() where the length
>> of a scatterlist segment is miscalculated. The actual fix
>> is a one-liner and it is quite obvious from reading the
>> code that this is what was intened.
>> 
>> As this is a core library function this series first adds
>> test cases to the kunit_iov_iter test that demonstrate that
>> there is a bug before actually fixing it in the last commit.
>> 
>> The bug was orignally introduced into kernel v6.3 where the
>> function lived in fs/netfs/iterator.c. It was later moved
>> to lib/scatterlist.c in v6.5. Thus the actual fix is only
>> marked for backports to v6.5+.
>> 
>> Christian A. Ehrhardt (3):
>>   lib: kunit_iov_iter: Improve error detection
>>   lib: kunit_iov_iter: Add tests for extract_iter_to_sg
>>   lib: Fix length calculation in extract_kvec_to_sg
>> 
>>  lib/scatterlist.c          |   2 +-
>>  lib/tests/kunit_iov_iter.c | 147 ++++++++++++++++++++++++++++++++++++-
>>  2 files changed, 147 insertions(+), 2 deletions(-)
>
>Reviewed-by: Josh Law <objecting@xxxxxxxxxxxxx>


(KUnit changes)

Tested-By: Josh Law <objecting@xxxxxxxxxxxxx>

Great patch! Keep it up!