diff options
| -rw-r--r-- | fs/smb/server/vfs.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c index c002cc4b1c02..04a4bd0f492b 100644 --- a/fs/smb/server/vfs.c +++ b/fs/smb/server/vfs.c @@ -248,17 +248,20 @@ out: static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, size_t count) { + const struct cred *saved_cred; ssize_t v_len; char *stream_buf = NULL; ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", *pos, count); + saved_cred = override_creds(fp->filp->f_cred); v_len = ksmbd_vfs_getcasexattr(file_mnt_idmap(fp->filp), fp->filp->f_path.dentry, fp->stream.name, fp->stream.size, &stream_buf); + revert_creds(saved_cred); if ((int)v_len <= 0) return (int)v_len; @@ -382,6 +385,7 @@ int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count, static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, size_t count) { + const struct cred *saved_cred; char *stream_buf = NULL, *wbuf; struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); size_t size; @@ -402,6 +406,7 @@ static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, count = XATTR_SIZE_MAX - *pos; } + saved_cred = override_creds(fp->filp->f_cred); v_len = ksmbd_vfs_getcasexattr(idmap, fp->filp->f_path.dentry, fp->stream.name, @@ -410,14 +415,14 @@ static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, if (v_len < 0) { pr_err("not found stream in xattr : %zd\n", v_len); err = v_len; - goto out; + goto out_revert; } if (v_len < size) { wbuf = kvzalloc(size, KSMBD_DEFAULT_GFP); if (!wbuf) { err = -ENOMEM; - goto out; + goto out_revert; } if (v_len > 0) @@ -435,6 +440,8 @@ static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, size, 0, true); +out_revert: + revert_creds(saved_cred); if (err < 0) goto out; else |