From: Namjae Jeon linkinjeon@kernel.org
mainline inclusion from mainline-5.16-rc3 commit 1ec72153ff434ce75bace3044dc89a23a05d7064 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I60T7G CVE: NA
Reference: https://git.kernel.org/torvalds/linux/c/1ec72153ff43
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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: Jason Yan yanaijie@huawei.com Signed-off-by: Zhong Jinghua zhongjinghua@huawei.com --- fs/ksmbd/smb2pdu.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 0b2d2904f7e7..96a7a2bcd878 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -4423,6 +4423,12 @@ static void get_file_stream_info(struct ksmbd_work *work, generic_fillattr(file_inode(fp->filp), &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; @@ -4431,12 +4437,6 @@ static void get_file_stream_info(struct ksmbd_work *work, 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); @@ -4480,6 +4480,7 @@ static void get_file_stream_info(struct ksmbd_work *work, 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 *) @@ -4488,14 +4489,13 @@ static void get_file_stream_info(struct ksmbd_work *work, "::$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);