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smb311 client: fix missing tcon check when mounting with linux/posix extensions

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commit b365b9d404b7376c60c91cd079218bfef11b7822 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Steve French
2025-04-06 14:09:19 -05:00
committed by Greg Kroah-Hartman
parent 475b9b45dc
commit 4e73e1f685
1 changed files with 2 additions and 0 deletions
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2
fs/smb/client/connect.c
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@@ -2417,6 +2417,8 @@ 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;
}