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io_uring: remove bogus RLIMIT_NOFILE check in file registration

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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>
This commit is contained in:
Jens Axboe 2020-04-03 13:54:26 -06:00 committed by Greg Kroah-Hartman
parent 6124e10dbc
commit 38119a6897
1 changed files with 0 additions and 7 deletions
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7
fs/io_uring.c
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@ -3092,13 +3092,6 @@ static int __io_sqe_files_scm(struct io_ring_ctx *ctx, int nr, int offset)
struct sk_buff *skb;
int i;
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;