From 4a5108cdc92795ff035758a79b09cd0376ecec12 Mon Sep 17 00:00:00 2001 From: Konstantin Belousov Date: Sun, 28 Feb 2021 02:13:19 +0200 Subject: [PATCH] nameicap_tracker_add: avoid duplicates in the tracker list Approved by: re (gjb) (cherry picked from commit 2388ad7c293fbc89ee239a1adcb87fd158c4e8e9) --- sys/kern/vfs_lookup.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sys/kern/vfs_lookup.c b/sys/kern/vfs_lookup.c index 73290e8da05..cdd4a914239 100644 --- a/sys/kern/vfs_lookup.c +++ b/sys/kern/vfs_lookup.c @@ -182,6 +182,9 @@ nameicap_tracker_add(struct nameidata *ndp, struct vnode *dp) if ((ndp->ni_lcf & NI_LCF_CAP_DOTDOT) == 0 || dp->v_type != VDIR) return; cnp = &ndp->ni_cnd; + nt = TAILQ_LAST(&ndp->ni_cap_tracker, nameicap_tracker_head); + if (nt != NULL && nt->dp == dp) + return; nt = malloc(sizeof(*nt), M_NAMEITRACKER, M_WAITOK); vhold(dp); nt->dp = dp; -- 2.45.0