On Fri, Oct 04, 2024 at 07:40:37PM +0530, SurajSonawane2415 wrote: > In the function blk_rq_prep_clone, the variable bio is declared but can remain uninitialized > if the allocation with bio_alloc_clone fails. This can lead to undefined behavior when the > function attempts to free bio in the error handling section using bio_put(bio). > By initializing bio to NULL at declaration, we ensure that the cleanup code will only > interact with bio if it has been successfully allocated. I don't think your explanation makes sense. The line where bio_alloc_clone happens: bio = bio_alloc_clone(rq->q->disk->part0, bio_src, gfp_mask, bs); If it fails, then bio is initialized to NULL.
