From 015fe986c3e05f2d18e2b7d0c356306b98b69656 Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@microsoft.com>
Date: Sun, 6 Apr 2025 14:09:19 -0500
Subject: [PATCH] smb311 client: fix missing tcon check when mounting with
linux/posix extensions
When mounting the same share twice, once with the "linux" mount parameter
(or equivalently "posix") and then once without (or e.g. with "nolinux"),
we were incorrectly reusing the same tree connection for both mounts.
This meant that the first mount of the share on the client, would
cause subsequent mounts of that same share on the same client to
ignore that mount parm ("linux" vs. "nolinux") and incorrectly reuse
the same tcon.
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
---
fs/smb/client/connect.c | 2 ++
1 file changed, 2 insertions(+)
@@ -2556,6 +2556,8 @@ static int match_tcon(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
return 0;
if (tcon->nodelete != ctx->nodelete)
return 0;
+ if (tcon->posix_extensions != ctx->linux_ext)
+ return 0;
return 1;
}
--
2.43.0
When mounting the same share twice, once with the "linux" mount parameter (or equivalently "posix") and then once without (or e.g. with "nolinux"), we were incorrectly reusing the same tree connection for both mounts. This meant that the first mount of the share on the client, would cause subsequent mounts of that same share on the same client to ignore that mount parm ("linux" vs. "nolinux") and incorrectly reuse the same tcon. See attached