[v2,0/2] fix request uaf in nbd_read_stat()

Message

Yu Kuai Aug. 9, 2021, 3:09 a.m. UTC

This patchset fix request uaf in nbd, other drivers might have the
same problem. Will fix them later if this patchset is accepted.

Changes in v2:
 - as Bart suggested, add a new helper function for drivers to get
 request by tag.

Yu Kuai (2):
  blk-mq: add a new interface to get request by tag
  nbd: convert to use blk_mq_get_rq_by_tag()

 block/blk-mq-tag.c     | 33 +++++++++++++++++++++++++++++++++
 block/blk-mq.c         |  1 +
 block/blk-mq.h         |  1 -
 drivers/block/nbd.c    | 11 ++++++-----
 include/linux/blk-mq.h |  3 +++
 5 files changed, 43 insertions(+), 6 deletions(-)