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Linux: don't oops on writeback if vcache has no stashed credentials

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When doing writeback, use current credentials if we can't find
stashed credentials in the vcache entry.
This is normally stashed in afs_open, so it's not clear how we
get to that point, but that's not a reason to trigger an oops.

Change-Id: I60937e3f9e360e68ea84205570c05cabb47ef08e
Reviewed-on: http://gerrit.openafs.org/1063
Reviewed-by: Simon Wilkinson <sxw@inf.ed.ac.uk>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
This commit is contained in:
Marc Dionne 2010-01-04 19:37:40 -05:00 committed by Derrick Brashear
parent 747a8c0642
commit 94ff83fee8
1 changed files with 4 additions and 1 deletions
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5
src/afs/LINUX/osi_vnodeops.c
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@ -2171,7 +2171,10 @@ afs_linux_writepage(struct page *pp)
/* Grab the creds structure currently held in the vnode, and /* Grab the creds structure currently held in the vnode, and
* get a reference to it, in case it goes away ... */ * get a reference to it, in case it goes away ... */
credp = vcp->cred; credp = vcp->cred;
crhold(credp); if (credp)
crhold(credp);
else
credp = crref();
ReleaseWriteLock(&vcp->lock); ReleaseWriteLock(&vcp->lock);
AFS_GUNLOCK(); AFS_GUNLOCK();