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authorChristian Brauner <brauner@kernel.org>2023-01-13 14:49:29 +0300
committerChristian Brauner (Microsoft) <brauner@kernel.org>2023-01-19 11:24:29 +0300
commit0dbe12f2e49c046444461b5f4be49df2cafb3a40 (patch)
treebf78bfe3a23a29bb73db3dc6076cdbab7bc307d2 /security
parentf861646a65623bcff91d544acbc4413d62d97b79 (diff)
downloadlinux-0dbe12f2e49c046444461b5f4be49df2cafb3a40.tar.xz
fs: port i_{g,u}id_{needs_}update() to mnt_idmap
Convert to struct mnt_idmap. Last cycle we merged the necessary infrastructure in 256c8aed2b42 ("fs: introduce dedicated idmap type for mounts"). This is just the conversion to struct mnt_idmap. Currently we still pass around the plain namespace that was attached to a mount. This is in general pretty convenient but it makes it easy to conflate namespaces that are relevant on the filesystem with namespaces that are relevent on the mount level. Especially for non-vfs developers without detailed knowledge in this area this can be a potential source for bugs. Once the conversion to struct mnt_idmap is done all helpers down to the really low-level helpers will take a struct mnt_idmap argument instead of two namespace arguments. This way it becomes impossible to conflate the two eliminating the possibility of any bugs. All of the vfs and all filesystems only operate on struct mnt_idmap. Acked-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Diffstat (limited to 'security')
-rw-r--r--security/integrity/evm/evm_main.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index 4e5adddb3577..cf24c5255583 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -783,11 +783,10 @@ static int evm_attr_change(struct mnt_idmap *idmap,
struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = d_backing_inode(dentry);
- struct user_namespace *mnt_userns = mnt_idmap_owner(idmap);
unsigned int ia_valid = attr->ia_valid;
- if (!i_uid_needs_update(mnt_userns, attr, inode) &&
- !i_gid_needs_update(mnt_userns, attr, inode) &&
+ if (!i_uid_needs_update(idmap, attr, inode) &&
+ !i_gid_needs_update(idmap, attr, inode) &&
(!(ia_valid & ATTR_MODE) || attr->ia_mode == inode->i_mode))
return 0;