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io_uring: fix uninitialized field in rw io_kiocb

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io_rw_init_file does not initialize kiocb->private, so when iocb_bio_iopoll
reads kiocb->private it can contain uninitialized data.

Fixes: 3e08773c38 ("block: switch polling to be bio based")
Signed-off-by: Joseph Ravichandran <jravi@mit.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Joseph Ravichandran 2022-04-28 12:57:52 -04:00 committed by Jens Axboe
parent 5a1e99b61b
commit 32452a3eb8
1 changed files with 1 additions and 0 deletions
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1
fs/io_uring.c
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@ -3783,6 +3783,7 @@ static int io_rw_init_file(struct io_kiocb *req, fmode_t mode)
if (!(kiocb->ki_flags & IOCB_DIRECT) || !file->f_op->iopoll)
return -EOPNOTSUPP;
kiocb->private = NULL;
kiocb->ki_flags |= IOCB_HIPRI | IOCB_ALLOC_CACHE;
kiocb->ki_complete = io_complete_rw_iopoll;
req->iopoll_completed = 0;