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Date:      Sun, 08 Jan 2017 22:43:07 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 215883] If the Setattr operation for NFSv4.1 can erroneously report EBADRPC
Message-ID:  <bug-215883-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D215883

            Bug ID: 215883
           Summary: If the Setattr operation for NFSv4.1 can erroneously
                    report EBADRPC
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: rmacklem@FreeBSD.org

Created attachment 178638
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D178638&action=
=3Dedit
Patch to fix the NFSv4 Setattr RPC error return.

When the NFSv4 client receives a reply to a setattr where the error failure
is an operation before the Setattr, the code would erroneously try to
parse an attribute bitmap and fail with EBADRPC.
This patch adds a check for end of RPC message to avoid this and make it
reply the correct error.
The main case where this would happen is in a recovery from a
NFSERR_BADSESSION failure on the server, which is pretty rare.

The attached 1 line patch fixes this.

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