From owner-svn-src-stable@freebsd.org Fri Feb 8 16:38:31 2019 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A6C0114B192F; Fri, 8 Feb 2019 16:38:31 +0000 (UTC) (envelope-from markj@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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 493C48A04C; Fri, 8 Feb 2019 16:38:31 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 36D041BC66; Fri, 8 Feb 2019 16:38:31 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x18GcVa5088560; Fri, 8 Feb 2019 16:38:31 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x18GcVZ7088559; Fri, 8 Feb 2019 16:38:31 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201902081638.x18GcVZ7088559@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Fri, 8 Feb 2019 16:38:31 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r343914 - stable/12/sys/kern X-SVN-Group: stable-12 X-SVN-Commit-Author: markj X-SVN-Commit-Paths: stable/12/sys/kern X-SVN-Commit-Revision: 343914 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 493C48A04C X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.93 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-0.99)[-0.994,0]; NEURAL_HAM_SHORT(-0.94)[-0.941,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-0.999,0] X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Feb 2019 16:38:31 -0000 Author: markj Date: Fri Feb 8 16:38:30 2019 New Revision: 343914 URL: https://svnweb.freebsd.org/changeset/base/343914 Log: MFC r343626: Prevent some kobj memory allocation failures from panicking the system. Modified: stable/12/sys/kern/subr_kobj.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/kern/subr_kobj.c ============================================================================== --- stable/12/sys/kern/subr_kobj.c Fri Feb 8 16:18:17 2019 (r343913) +++ stable/12/sys/kern/subr_kobj.c Fri Feb 8 16:38:30 2019 (r343914) @@ -125,38 +125,43 @@ kobj_class_compile_common(kobj_class_t cls, kobj_ops_t cls->ops = ops; } -void -kobj_class_compile(kobj_class_t cls) +static int +kobj_class_compile1(kobj_class_t cls, int mflags) { kobj_ops_t ops; KOBJ_ASSERT(MA_NOTOWNED); - /* - * Allocate space for the compiled ops table. - */ - ops = malloc(sizeof(struct kobj_ops), M_KOBJ, M_NOWAIT); - if (!ops) - panic("%s: out of memory", __func__); + ops = malloc(sizeof(struct kobj_ops), M_KOBJ, mflags); + if (ops == NULL) + return (ENOMEM); - KOBJ_LOCK(); - /* * We may have lost a race for kobj_class_compile here - check * to make sure someone else hasn't already compiled this * class. */ + KOBJ_LOCK(); if (cls->ops) { KOBJ_UNLOCK(); free(ops, M_KOBJ); - return; + return (0); } - kobj_class_compile_common(cls, ops); KOBJ_UNLOCK(); + return (0); } void +kobj_class_compile(kobj_class_t cls) +{ + int error; + + error = kobj_class_compile1(cls, M_WAITOK); + KASSERT(error == 0, ("kobj_class_compile1 returned %d", error)); +} + +void kobj_class_compile_static(kobj_class_t cls, kobj_ops_t ops) { @@ -254,24 +259,6 @@ kobj_class_free(kobj_class_t cls) free(ops, M_KOBJ); } -kobj_t -kobj_create(kobj_class_t cls, - struct malloc_type *mtype, - int mflags) -{ - kobj_t obj; - - /* - * Allocate and initialise the new object. - */ - obj = malloc(cls->size, mtype, mflags | M_ZERO); - if (!obj) - return NULL; - kobj_init(obj, cls); - - return obj; -} - static void kobj_init_common(kobj_t obj, kobj_class_t cls) { @@ -280,30 +267,52 @@ kobj_init_common(kobj_t obj, kobj_class_t cls) cls->refs++; } -void -kobj_init(kobj_t obj, kobj_class_t cls) +static int +kobj_init1(kobj_t obj, kobj_class_t cls, int mflags) { - KOBJ_ASSERT(MA_NOTOWNED); - retry: - KOBJ_LOCK(); + int error; - /* - * Consider compiling the class' method table. - */ - if (!cls->ops) { + KOBJ_LOCK(); + while (cls->ops == NULL) { /* * kobj_class_compile doesn't want the lock held * because of the call to malloc - we drop the lock * and re-try. */ KOBJ_UNLOCK(); - kobj_class_compile(cls); - goto retry; + error = kobj_class_compile1(cls, mflags); + if (error != 0) + return (error); + KOBJ_LOCK(); } - kobj_init_common(obj, cls); - KOBJ_UNLOCK(); + return (0); +} + +kobj_t +kobj_create(kobj_class_t cls, struct malloc_type *mtype, int mflags) +{ + kobj_t obj; + + obj = malloc(cls->size, mtype, mflags | M_ZERO); + if (obj == NULL) + return (NULL); + if (kobj_init1(obj, cls, mflags) != 0) { + free(obj, mtype); + return (NULL); + } + return (obj); +} + +void +kobj_init(kobj_t obj, kobj_class_t cls) +{ + int error; + + error = kobj_init1(obj, cls, M_NOWAIT); + if (error != 0) + panic("kobj_init1 failed: error %d", error); } void