diff --git a/fs/io_uring.c b/fs/io_uring.c index ebcf25a68395537f28de5541a959c381e3a015b0..4b1bb6ccac761e856b686cd6b0ea0fac26744a09 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3829,10 +3829,6 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p) if (ret) goto err; - ret = io_uring_get_fd(ctx); - if (ret < 0) - goto err; - memset(&p->sq_off, 0, sizeof(p->sq_off)); p->sq_off.head = offsetof(struct io_rings, sq.head); p->sq_off.tail = offsetof(struct io_rings, sq.tail); @@ -3850,6 +3846,14 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p) p->cq_off.overflow = offsetof(struct io_rings, cq_overflow); p->cq_off.cqes = offsetof(struct io_rings, cqes); + /* + * Install ring fd as the very last thing, so we don't risk someone + * having closed it before we finish setup + */ + ret = io_uring_get_fd(ctx); + if (ret < 0) + goto err; + p->features = IORING_FEAT_SINGLE_MMAP; return ret; err: