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While salvaging a RW volume, salvager may segfault if it encounters an orphaned directory with a parent vnode that does not exist. For example, if the large vnode index contains a maximum vnode of 2901, any parent vnode encountered that is larger than 2901 will result in an out-of-bounds reference to our vnode essence array, leading to a segfault or undefined behavior. Modify the logic to check for out-of-bounds parent vnodes, and log them rather than segfaulting. Change-Id: I49f53935830fbb428fe0bff04c33248d3806a4b2 Reviewed-on: https://gerrit.openafs.org/14385 Tested-by: BuildBot <buildbot@rampaginggeek.com> Reviewed-by: Andrew Deason <adeason@sinenomine.net> Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
AFS is a distributed file system that enables users to share and access all of the files stored in a network of computers as easily as they access the files stored on their local machines. The file system is called distributed for this exact reason: files can reside on many different machines, but are available to users on every machine. OpenAFS 1.0 was originally released by IBM under the terms of the IBM Public License 1.0 (IPL10). For details on IPL10 see the LICENSE file in this directory. The current OpenAFS distribution is licensed under a combination of the IPL10 and many other licenses as granted by the relevant copyright holders. The LICENSE file in this directory contains more details, thought it is not a comprehensive statement. See INSTALL for information about building and installing OpenAFS on various platforms. See CODING for developer information and guidelines. See NEWS for recent changes to OpenAFS.