From: Jens Axboe axboe@kernel.dk
commit c336e992cb1cb1db9ee608dfb30342ae781057ab upstream.
We already checked this limit when the file was opened, and we keep it open in the file table. Hence when we added unit_inflight to the count we want to register, we're doubly accounting these files. This results in -EMFILE for file registration, if we're at half the limit.
Cc: stable@vger.kernel.org # v5.1+ Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/io_uring.c | 7 ------- 1 file changed, 7 deletions(-)
--- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5426,13 +5426,6 @@ static int __io_sqe_files_scm(struct io_ struct sk_buff *skb; int i, nr_files;
- if (!capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN)) { - unsigned long inflight = ctx->user->unix_inflight + nr; - - if (inflight > task_rlimit(current, RLIMIT_NOFILE)) - return -EMFILE; - } - fpl = kzalloc(sizeof(*fpl), GFP_KERNEL); if (!fpl) return -ENOMEM;