author: Linus Torvalds <torvalds@linux-foundation.org> 2021-04-27 12:49:42 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2021-04-27 12:49:42 -0700
commit: 34a456eb1fe26303d0661693d01a50e83a551da3
parent: cc15422c1f14a84f539df7637b09d534e71b73a7
Commit Summary:
Diffstat:
1 file changed, 3 insertions, 8 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 0fa000ad7e9b..79b0ff9b151e 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2824,16 +2824,14 @@ static int may_delete(struct user_namespace *mnt_userns, struct inode *dir,
static inline int may_create(struct user_namespace *mnt_userns,
struct inode *dir, struct dentry *child)
{
- struct user_namespace *s_user_ns;
audit_inode_child(dir, child, AUDIT_TYPE_CHILD_CREATE);
if (child->d_inode)
return -EEXIST;
if (IS_DEADDIR(dir))
return -ENOENT;
- s_user_ns = dir->i_sb->s_user_ns;
- if (!kuid_has_mapping(s_user_ns, fsuid_into_mnt(mnt_userns)) ||
- !kgid_has_mapping(s_user_ns, fsgid_into_mnt(mnt_userns)))
+ if (!fsuidgid_has_mapping(dir->i_sb, mnt_userns))
return -EOVERFLOW;
+
return inode_permission(mnt_userns, dir, MAY_WRITE | MAY_EXEC);
}
@@ -3035,14 +3033,11 @@ static int may_o_create(struct user_namespace *mnt_userns,
const struct path *dir, struct dentry *dentry,
umode_t mode)
{
- struct user_namespace *s_user_ns;
int error = security_path_mknod(dir, dentry, mode, 0);
if (error)
return error;
- s_user_ns = dir->dentry->d_sb->s_user_ns;
- if (!kuid_has_mapping(s_user_ns, fsuid_into_mnt(mnt_userns)) ||
- !kgid_has_mapping(s_user_ns, fsgid_into_mnt(mnt_userns)))
+ if (!fsuidgid_has_mapping(dir->dentry->d_sb, mnt_userns))
return -EOVERFLOW;
error = inode_permission(mnt_userns, dir->dentry->d_inode,