When we unmount, and afs_globalVp is NULL (e.g. because root.afs was
unavailable when the client was started), we will panic the machine if
we try to release it. So, if afs_globalVp is NULL when we hit our
unmount handler, don't touch it.
Reported by Andy Cobaugh.
Change-Id: I4e5869237e24da320afc2b7edaf8edca0ab3e4e9
Reviewed-on: http://gerrit.openafs.org/5117
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
afsp->vfs_flag |= VFS_UNMOUNTED;
- /* release the root vnode, which should be the last reference to us
- * besides the caller of afs_unmount */
- rootvp = afs_globalVp;
- afs_globalVp = NULL;
- AFS_RELE(rootvp);
+ if (afs_globalVp) {
+ /* release the root vnode, which should be the last reference to us
+ * besides the caller of afs_unmount */
+ rootvp = afs_globalVp;
+ afs_globalVp = NULL;
+ AFS_RELE(rootvp);
+ }
AFS_GUNLOCK();
return 0;