[PATCH v2 24/39] notify: handle idmapped mounts
From: Christian Brauner <hidden>
Date: 2020-11-15 10:45:41
Also in:
linux-api, linux-ext4, linux-fsdevel, linux-integrity, selinux
Subsystem:
fanotify, filesystems (vfs and infrastructure), fsnotify: filesystem notification infrastructure, inotify, the rest · Maintainers:
Jan Kara, Alexander Viro, Christian Brauner, Linus Torvalds
Enable notify implementations to handle idmapped mounts by passing down the mount's user namespace. Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Christian Brauner <redacted> --- /* v2 */ patch introduced --- fs/notify/fanotify/fanotify_user.c | 2 +- fs/notify/inotify/inotify_user.c | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index de4d01bb1d8d..e3b2cb6a9d81 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c@@ -702,7 +702,7 @@ static int fanotify_find_path(int dfd, const char __user *filename, } /* you can only watch an inode if you have read permissions on it */ - ret = inode_permission(&init_user_ns, path->dentry->d_inode, MAY_READ); + ret = inode_permission(mnt_user_ns(path->mnt), path->dentry->d_inode, MAY_READ); if (ret) { path_put(path); goto out;
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index e995fd4e4e53..f39f5b81f2b3 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c@@ -31,6 +31,7 @@ #include <linux/wait.h> #include <linux/memcontrol.h> #include <linux/security.h> +#include <linux/mount.h> #include "inotify.h" #include "../fdinfo.h"
@@ -343,7 +344,7 @@ static int inotify_find_inode(const char __user *dirname, struct path *path, if (error) return error; /* you can only watch an inode if you have read permissions on it */ - error = inode_permission(&init_user_ns, path->dentry->d_inode, MAY_READ); + error = inode_permission(mnt_user_ns(path->mnt), path->dentry->d_inode, MAY_READ); if (error) { path_put(path); return error;
--
2.29.2