From a1aa8f14c864b6851649f9c3e74e9f12e6518edd Mon Sep 17 00:00:00 2001 From: Allan Jude Date: Fri, 2 Jul 2021 19:16:58 +0000 Subject: [PATCH] Revert parts of 938cfeb0f27303721081223816d4f251ffeb1767 When read and writing the UID/GID, we always want the value relative to the root user namespace, the kernel will take care of remapping this to the user namespace for us. Calling from_kuid(user_ns, uid) with a unmapped uid will return -1 as that uid is outside of the scope of that namespace, and will result in the files inside the namespace all being owned by 'nobody' and not being allowed to call chmod or chown on them. Reviewed-by: Brian Behlendorf Signed-off-by: Allan Jude Closes #12263 --- include/os/linux/kernel/linux/vfs_compat.h | 16 ---------------- 1 file changed, 16 deletions(-) diff --git a/include/os/linux/kernel/linux/vfs_compat.h b/include/os/linux/kernel/linux/vfs_compat.h index 91e908598f..b5ff1559ec 100644 --- a/include/os/linux/kernel/linux/vfs_compat.h +++ b/include/os/linux/kernel/linux/vfs_compat.h @@ -296,11 +296,7 @@ static inline struct dentry *file_dentry(const struct file *f) static inline uid_t zfs_uid_read_impl(struct inode *ip) { -#ifdef HAVE_SUPER_USER_NS - return (from_kuid(ip->i_sb->s_user_ns, ip->i_uid)); -#else return (from_kuid(kcred->user_ns, ip->i_uid)); -#endif } static inline uid_t zfs_uid_read(struct inode *ip) @@ -310,11 +306,7 @@ static inline uid_t zfs_uid_read(struct inode *ip) static inline gid_t zfs_gid_read_impl(struct inode *ip) { -#ifdef HAVE_SUPER_USER_NS - return (from_kgid(ip->i_sb->s_user_ns, ip->i_gid)); -#else return (from_kgid(kcred->user_ns, ip->i_gid)); -#endif } static inline gid_t zfs_gid_read(struct inode *ip) @@ -324,20 +316,12 @@ static inline gid_t zfs_gid_read(struct inode *ip) static inline void zfs_uid_write(struct inode *ip, uid_t uid) { -#ifdef HAVE_SUPER_USER_NS - ip->i_uid = make_kuid(ip->i_sb->s_user_ns, uid); -#else ip->i_uid = make_kuid(kcred->user_ns, uid); -#endif } static inline void zfs_gid_write(struct inode *ip, gid_t gid) { -#ifdef HAVE_SUPER_USER_NS - ip->i_gid = make_kgid(ip->i_sb->s_user_ns, gid); -#else ip->i_gid = make_kgid(kcred->user_ns, gid); -#endif } /*