On 7/11/19 1:22 PM, Wenwen Wang wrote: > From: Wenwen Wang <wenwen@xxxxxxxxxx> > > In bio_integrity_prep(), a kernel buffer is allocated through kmalloc() to > hold integrity metadata. Later on, the buffer will be attached to the bio > structure through bio_integrity_add_page(), which returns the number of > bytes of integrity metadata attached. Due to unexpected situations, > bio_integrity_add_page() may return 0. As a result, bio_integrity_prep() > needs to be terminated with 'false' returned to indicate this error. > However, the allocated kernel buffer is not freed on this execution path, > leading to a memory leak. > > To fix this issue, free the allocated buffer before returning from > bio_integrity_prep(). Applied, thanks. -- Jens Axboe
