From: Namjae Jeon linkinjeon@kernel.org
commit 1ec72153ff434ce75bace3044dc89a23a05d7064 upstream.
If xattr is not supported like exfat or fat, ksmbd server doesn't contain default data stream in FILE_STREAM_INFORMATION response. It will cause ppt or doc file update issue if local filesystem is such as ones. This patch move goto statement to contain it.
Fixes: 9f6323311c70 ("ksmbd: add default data stream name in FILE_STREAM_INFORMATION") Cc: stable@vger.kernel.org # v5.15 Acked-by: Hyunchul Lee hyc.lee@gmail.com Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ksmbd/smb2pdu.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)
--- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -4450,6 +4450,12 @@ static void get_file_stream_info(struct &stat); file_info = (struct smb2_file_stream_info *)rsp->Buffer;
+ buf_free_len = + smb2_calc_max_out_buf_len(work, 8, + le32_to_cpu(req->OutputBufferLength)); + if (buf_free_len < 0) + goto out; + xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); if (xattr_list_len < 0) { goto out; @@ -4458,12 +4464,6 @@ static void get_file_stream_info(struct goto out; }
- buf_free_len = - smb2_calc_max_out_buf_len(work, 8, - le32_to_cpu(req->OutputBufferLength)); - if (buf_free_len < 0) - goto out; - while (idx < xattr_list_len) { stream_name = xattr_list + idx; streamlen = strlen(stream_name); @@ -4507,6 +4507,7 @@ static void get_file_stream_info(struct file_info->NextEntryOffset = cpu_to_le32(next); }
+out: if (!S_ISDIR(stat.mode) && buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { file_info = (struct smb2_file_stream_info *) @@ -4515,14 +4516,13 @@ static void get_file_stream_info(struct "::$DATA", 7, conn->local_nls, 0); streamlen *= 2; file_info->StreamNameLength = cpu_to_le32(streamlen); - file_info->StreamSize = 0; - file_info->StreamAllocationSize = 0; + file_info->StreamSize = cpu_to_le64(stat.size); + file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); nbytes += sizeof(struct smb2_file_stream_info) + streamlen; }
/* last entry offset should be 0 */ file_info->NextEntryOffset = 0; -out: kvfree(xattr_list);
rsp->OutputBufferLength = cpu_to_le32(nbytes);