diff options
| author | Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> | 2012-05-11 18:36:44 +0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-05-11 18:45:12 +0400 |
| commit | f908ee9463b09ddd05e1c1a0111132212dc05fac (patch) | |
| tree | af80b227ec2049aa23fc3a8867e70fd685a4d34a /include/linux/blkdev.h | |
| parent | 080399aaaf3531f5b8761ec0ac30ff98891e8686 (diff) | |
| download | linux-f908ee9463b09ddd05e1c1a0111132212dc05fac.tar.xz | |
bio allocation failure due to bio_get_nr_vecs()
The number of bio_get_nr_vecs() is passed down via bio_alloc() to
bvec_alloc_bs(), which fails the bio allocation if
nr_iovecs > BIO_MAX_PAGES. For the underlying caller this causes an
unexpected bio allocation failure.
Limiting to queue_max_segments() is not sufficient, as max_segments
also might be very large.
bvec_alloc_bs(gfp_mask, nr_iovecs, ) => NULL when nr_iovecs > BIO_MAX_PAGES
bio_alloc_bioset(gfp_mask, nr_iovecs, ...)
bio_alloc(GFP_NOIO, nvecs)
xfs_alloc_ioend_bio()
Signed-off-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blkdev.h')
0 files changed, 0 insertions, 0 deletions