From e09c978aae5bedfdb379be80363b024b7d82638b Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 27 Aug 2016 23:44:04 -0400 Subject: NFSv4.1: Fix Oopsable condition in server callback races The slot table hasn't been an array since v3.7. Ensure that we use nfs4_lookup_slot() to access the slot correctly. Fixes: 87dda67e7386 ("NFSv4.1: Allow SEQUENCE to resize the slot table...") Signed-off-by: Trond Myklebust Cc: stable@vger.kernel.org # v3.8+ --- fs/nfs/callback_proc.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'fs/nfs/callback_proc.c') diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index c92a75e066a6..a4cf6d2c14a4 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -454,11 +454,8 @@ static bool referring_call_exists(struct nfs_client *clp, ((u32 *)&rclist->rcl_sessionid.data)[3], ref->rc_sequenceid, ref->rc_slotid); - spin_lock(&tbl->slot_tbl_lock); - status = (test_bit(ref->rc_slotid, tbl->used_slots) && - tbl->slots[ref->rc_slotid].seq_nr == + status = nfs4_slot_seqid_in_use(tbl, ref->rc_slotid, ref->rc_sequenceid); - spin_unlock(&tbl->slot_tbl_lock); if (status) goto out; } -- cgit v1.2.3-59-g8ed1b