From nobody Wed Oct 13 00:36:50 2021 X-Original-To: dev-commits-src-branches@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 6A88F17EC669; Wed, 13 Oct 2021 00:36:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4HTYWQ2VFMz3N0M; Wed, 13 Oct 2021 00:36:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 362CF1E24D; Wed, 13 Oct 2021 00:36:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 19D0aoJo060406; Wed, 13 Oct 2021 00:36:50 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 19D0aoXb060405; Wed, 13 Oct 2021 00:36:50 GMT (envelope-from git) Date: Wed, 13 Oct 2021 00:36:50 GMT Message-Id: <202110130036.19D0aoXb060405@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Mark Johnston Subject: git: e49d57eecc8e - stable/13 - linuxkpi: Handle a NULL cache pointer in kmem_cache_destroy() List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-branches@freebsd.org X-BeenThere: dev-commits-src-branches@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: markj X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: e49d57eecc8e4cb2247fc667928e91f62d392ca0 Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=e49d57eecc8e4cb2247fc667928e91f62d392ca0 commit e49d57eecc8e4cb2247fc667928e91f62d392ca0 Author: Mark Johnston AuthorDate: 2021-10-06 18:45:22 +0000 Commit: Mark Johnston CommitDate: 2021-10-13 00:36:18 +0000 linuxkpi: Handle a NULL cache pointer in kmem_cache_destroy() This is compatible with Linux, and some driver error paths depend on it. Reviewed by: bz, emaste Sponsored by: The FreeBSD Foundation (cherry picked from commit a76de17715ab689b0b53a1012e22d8a08470b6e4) --- sys/compat/linuxkpi/common/src/linux_slab.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sys/compat/linuxkpi/common/src/linux_slab.c b/sys/compat/linuxkpi/common/src/linux_slab.c index 35a88fd7cf42..0aa751ec886e 100644 --- a/sys/compat/linuxkpi/common/src/linux_slab.c +++ b/sys/compat/linuxkpi/common/src/linux_slab.c @@ -193,6 +193,9 @@ lkpi_kmem_cache_free(struct linux_kmem_cache *c, void *m) void linux_kmem_cache_destroy(struct linux_kmem_cache *c) { + if (c == NULL) + return; + if (unlikely(c->cache_flags & SLAB_TYPESAFE_BY_RCU)) { /* make sure all free callbacks have been called */ rcu_barrier();