From: Pavel Begunkov Date: Thu, 16 Jan 2025 02:53:26 +0000 (+0000) Subject: io_uring: clean up io_uring_register_get_file() X-Git-Tag: v6.14-rc1~18^2~18 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bb2d76344bc80933a462aa84581d1258e0dc758b;p=thirdparty%2Fkernel%2Flinux.git io_uring: clean up io_uring_register_get_file() Make it always reference the returned file. It's safer, especially with unregistrations happening under it. And it makes the api cleaner with no conditional clean ups by the caller. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/0d0b13a63e8edd6b5d360fc821dcdb035cb6b7e0.1736995897.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- diff --git a/io_uring/register.c b/io_uring/register.c index 05025047d1dab..0db181437ae33 100644 --- a/io_uring/register.c +++ b/io_uring/register.c @@ -853,6 +853,8 @@ struct file *io_uring_register_get_file(unsigned int fd, bool registered) return ERR_PTR(-EINVAL); fd = array_index_nospec(fd, IO_RINGFD_REG_MAX); file = tctx->registered_rings[fd]; + if (file) + get_file(file); } else { file = fget(fd); } @@ -919,7 +921,7 @@ SYSCALL_DEFINE4(io_uring_register, unsigned int, fd, unsigned int, opcode, trace_io_uring_register(ctx, opcode, ctx->file_table.data.nr, ctx->buf_table.nr, ret); mutex_unlock(&ctx->uring_lock); - if (!use_registered_ring) - fput(file); + + fput(file); return ret; } diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c index a1c7c8db55455..b5e47030764e5 100644 --- a/io_uring/rsrc.c +++ b/io_uring/rsrc.c @@ -1079,7 +1079,6 @@ int io_register_clone_buffers(struct io_ring_ctx *ctx, void __user *arg) if (src_ctx != ctx) mutex_unlock(&src_ctx->uring_lock); - if (!registered_src) - fput(file); + fput(file); return ret; }