We were incorrectly initializing the posix extensions in the
conversion to the new mount API.

CC: <stable@vger.kernel.org> # 5.11+
Reported-by: Christian Brauner <christian.brauner@ubuntu.com>
Suggested-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
---
 fs/cifs/fs_context.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c
index 4515a0883262..3109def8e199 100644
--- a/fs/cifs/fs_context.c
+++ b/fs/cifs/fs_context.c
@@ -1252,10 +1252,17 @@ static int smb3_fs_context_parse_param(struct
fs_context *fc,
  ctx->posix_paths = 1;
  break;
  case Opt_unix:
- if (result.negated)
+ if (result.negated) {
+ if (ctx->linux_ext == 1)
+ pr_warn_once("conflicting posix mount options specified\n");
  ctx->linux_ext = 0;
- else
  ctx->no_linux_ext = 1;
+ } else {
+ if (ctx->no_linux_ext == 1)
+ pr_warn_once("conflicting posix mount options specified\n");
+ ctx->linux_ext = 1;
+ ctx->no_linux_ext = 0;
+ }
  break;
  case Opt_nocase:
  ctx->nocase = 1;

-- 
Thanks,

Steve