diff mbox series

[v3,2/7] fs/namei.c: Add missing umask strip in vfs_tmpfile

Message ID 1650020543-24908-2-git-send-email-xuyang2018.jy@fujitsu.com
State Superseded
Headers show
Series None | expand

Commit Message

Yang Xu April 15, 2022, 11:02 a.m. UTC 
If underflying filesystem doesn't enable own CONFIG_FS_POSIX_ACL, then
posix_acl_create can't be called. So we will miss umask strip, ie
use ext4 with noacl or disblae CONFIG_EXT4_FS_POSIX_ACL.

Reported-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
---
 fs/namei.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/fs/namei.c b/fs/namei.c
index 3f1829b3ab5b..bbc7c950bbdc 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3521,6 +3521,8 @@  struct dentry *vfs_tmpfile(struct user_namespace *mnt_userns,
 	child = d_alloc(dentry, &slash_name);
 	if (unlikely(!child))
 		goto out_err;
+	if (!IS_POSIXACL(dir))
+		mode &= ~current_umask();
 	error = dir->i_op->tmpfile(mnt_userns, dir, child, mode);
 	if (error)
 		goto out_err;