OpenAFS Master Repository branch, master, updated. BP--openafs-stable-1_6_x-594-g02a2f60

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit 02a2f6005042b9370350bdc03d4aab83355b205d
Author: Simon Wilkinson <sxw@your-file-system.com>
Date:   Sun Dec 26 14:14:38 2010 +0000

    volser: Fix broken bulk conversion
    
    The converstions between the original, N and U bulk list return
    values were all broken in various ways:
    
    1/ Shifting from malloc to xdr_alloc() (in 4f1efdc8b73ed)
       subtly changed the behaviour when handling an empty list. The
       correct XDR representation of an empty list is {0, NULL}, not
       {0, &memZero}. Fix the code so that if the source list is empty,
       an empty destination list is returned.
    2/ The destination list length was never being filled in. This means
       that xdr_free() could not be safely used on this list, as the wrong
       length would be passed to the allocator. Fill in the destination
       list length as part of the conversion.
    3/ xdr_free(...) is a no-op when called with an empty list - there's
       no need to check before calling it. Remove these checks to improve
       the code's readability.
    4/ xdr_free(...) should only be called when the RPC returned
       sucessfully. The stub is responsible for freeing data should the call
       fail mid way through unmarshalling.
    5/ Where an RPC returns the number of entries independently of the
       length of a counted array, it is unsafe to use that length to
       iterate the array without checking that it is within the array
       bounds. Instead, just use the array length when performing
       conversions.
    
    Change-Id: Ied9a77849062e5a1e506f13d4d90d116cefe41e4
    Reviewed-on: http://gerrit.openafs.org/3596
    Reviewed-by: Derrick Brashear <shadow@dementia.org>
    Tested-by: BuildBot <buildbot@rampaginggeek.com>

 src/volser/vsutils.c |   74 ++++++++++++++++++++++++++++++-------------------
 1 files changed, 45 insertions(+), 29 deletions(-)

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