From da183c7af8444cb2c1beedaa498a9359f19ff665 Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Mon, 8 Jul 2013 11:15:45 -0700 Subject: IB/uverbs: Use get_unused_fd_flags(O_CLOEXEC) instead of get_unused_fd() The macro get_unused_fd() is used to allocate a file descriptor with default flags. Those default flags (0) can be "unsafe": O_CLOEXEC must be used by default to not leak file descriptor across exec(). Replace calls to get_unused_fd() in uverbs with calls to get_unused_fd_flags(O_CLOEXEC). Inheriting uverbs fds across exec() cannot be used to do anything useful. Based on a patch/suggestion from Yann Droneaud . Signed-off-by: Roland Dreier --- drivers/infiniband/core/uverbs_cmd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/infiniband/core/uverbs_cmd.c') diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index a7d00f6..b3c07b0 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -334,7 +334,7 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, resp.num_comp_vectors = file->device->num_comp_vectors; - ret = get_unused_fd(); + ret = get_unused_fd_flags(O_CLOEXEC); if (ret < 0) goto err_free; resp.async_fd = ret; @@ -1184,7 +1184,7 @@ ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - ret = get_unused_fd(); + ret = get_unused_fd_flags(O_CLOEXEC); if (ret < 0) return ret; resp.fd = ret; -- cgit v1.1