Re: [PATCH v7 02/12] file: Export receive_fd() to modules
From: Al Viro <viro@zeniv.linux.org.uk>
Date: 2021-05-20 06:19:26
Also in:
kvm, linux-fsdevel, linux-iommu, lkml, virtualization
On Mon, May 17, 2021 at 05:55:03PM +0800, Xie Yongji wrote:
Export receive_fd() so that some modules can use it to pass file descriptor between processes without missing any security stuffs.
Which tree is that against? Because in mainline this won't even build, let alone work.
quoted hunk ↗ jump to hunk
--- a/fs/file.c +++ b/fs/file.c@@ -1135,6 +1135,12 @@ int __receive_fd(int fd, struct file *file, int __user *ufd, unsigned int o_flag return new_fd; } +int receive_fd(struct file *file, unsigned int o_flags) +{ + return __receive_fd(-1, file, NULL, o_flags); +} +EXPORT_SYMBOL_GPL(receive_fd);
fs/file.c:1097:int __receive_fd(struct file *file, int __user *ufd, unsigned int o_flags)