NFSD: fix use-after-free in __nfs42_ssc_open()
Problem caused by source's vfsmount being unmounted but remains on the delayed unmount list. This happens when nfs42_ssc_open() return errors. Fixed by removing nfsd4_interssc_connect(), leave the vfsmount for the laundromat to unmount when idle time expires. We don't need to call nfs_do_sb_deactive when nfs42_ssc_open return errors since the file was not opened so nfs_server->active was not incremented. Same as in nfsd4_copy, if we fail to launch nfsd4_do_async_copy thread then there's no need to call nfs_do_sb_deactive Reported-by:Xingyuan Mo <hdthky0@gmail.com> Signed-off-by:
Dai Ngo <dai.ngo@oracle.com> Tested-by:
Xingyuan Mo <hdthky0@gmail.com> Signed-off-by:
Chuck Lever <chuck.lever@oracle.com>
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