From 08def480f9b913a2d433c3a96228cdd315ba5c2f Mon Sep 17 00:00:00 2001 From: Dai Ngo Date: Mon, 23 Jan 2023 21:34:13 -0800 Subject: [PATCH] NFSD: fix leaked reference count of nfsd4_ssc_umount_item [ Upstream commit 34e8f9ec4c9ac235f917747b23a200a5e0ec857b ] The reference count of nfsd4_ssc_umount_item is not decremented on error conditions. This prevents the laundromat from unmounting the vfsmount of the source file. This patch decrements the reference count of nfsd4_ssc_umount_item on error. Fixes: f4e44b393389 ("NFSD: delay unmount source's export after inter-server copy completed.") Signed-off-by: Dai Ngo Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever Signed-off-by: Sasha Levin --- fs/nfsd/nfs4proc.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index e8f3448b8..f0ae9c80c 100755 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1809,13 +1809,17 @@ out: release_copy_files(copy); return status; out_err: + if (nfsd4_ssc_is_inter(copy)) { + /* + * Source's vfsmount of inter-copy will be unmounted + * by the laundromat. Use copy instead of async_copy + * since async_copy->ss_nsui might not be set yet. + */ + refcount_dec(©->ss_nsui->nsui_refcnt); + } if (async_copy) cleanup_async_copy(async_copy); status = nfserrno(-ENOMEM); - /* - * source's vfsmount of inter-copy will be unmounted - * by the laundromat - */ goto out; }