From: Jakub Kicinski Date: Tue, 28 Apr 2026 01:41:37 +0000 (-0700) Subject: Merge branch 'net-sched-taprio-fix-null-pointer-dereference-in-class-dump' X-Git-Tag: v7.1-rc2~22^2~30 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c4047e7075b303b952a595f901b0f022c2403206;p=thirdparty%2Fkernel%2Flinux.git Merge branch 'net-sched-taprio-fix-null-pointer-dereference-in-class-dump' Weiming Shi says: ==================== net/sched: taprio: fix NULL pointer dereference in class dump Patch 1/2 is the fix: replace NULL entries in q->qdiscs[] with the global &noop_qdisc singleton so that control-plane dump paths, as well as the existing NULL guards in the data-plane enqueue/dequeue paths, cannot deref a NULL child qdisc. Patch 2/2 is a tdc regression test that drives the graft + delete + class-dump sequence on a multi-queue netdevsim device. It panics the vulnerable kernel and passes on the fixed one. ==================== Link: https://patch.msgid.link/20260422161958.2517539-2-bestswngs@gmail.com Signed-off-by: Jakub Kicinski --- c4047e7075b303b952a595f901b0f022c2403206