From: Pavel Begunkov Date: Wed, 13 Apr 2022 15:10:35 +0000 (+0100) Subject: io_uring: fix poll error reporting X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7179c3ce3dbff646c55f7cd664a895f462f049e5;p=linux.git io_uring: fix poll error reporting We should not return an error code in req->result in io_poll_check_events(), because it may get mangled and returned as success. Just return the error code directly, the callers will fail the request or proceed accordingly. Fixes: 6bf9c47a3989 ("io_uring: defer file assignment") Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/5f03514ee33324dc811fb93df84aee0f695fb044.1649862516.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- diff --git a/fs/io_uring.c b/fs/io_uring.c index d06f1952fdfa1..ab674a0d269bd 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5861,9 +5861,8 @@ static int io_poll_check_events(struct io_kiocb *req, bool locked) unsigned flags = locked ? 0 : IO_URING_F_UNLOCKED; if (unlikely(!io_assign_file(req, flags))) - req->result = -EBADF; - else - req->result = vfs_poll(req->file, &pt) & req->apoll_events; + return -EBADF; + req->result = vfs_poll(req->file, &pt) & req->apoll_events; } /* multishot, just fill an CQE and proceed */