From nobody Fri Sep 22 21:51:12 2023 X-Original-To: dev-commits-src-all@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 4RsmDc38Lcz4tTjt; Fri, 22 Sep 2023 21:51:12 +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 4RsmDc2ZNbz3PkZ; Fri, 22 Sep 2023 21:51:12 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1695419472; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=JOKAFnifKTUrmYmOaJRagYpx0djxp0T7cNUWivUdk9k=; b=dnla667I+DyGUAHk6DdV+myJaKtBxI8P52dxskZW5wu55ZeZ07vZ8qC/p4X1V0gK+tU1OO UxDkr7SecPXKQZz5Z25s58OjdciioeNAmH7FHUqshSvPwsn40zlZZicfzKGgONQYEsCtKC 8HdAijAa8xxYrU1MJ+JKKR9IZNf2oKRyiVq43XNNOFi+VJYlA96LRGTfWMjkFK7NTutKBe eIkdSgjXA/Uf/hY9BxNJvGnhNSgT4nMwvpdfpKtfUWx+TAK6la/XwXmMJgkizuHmx2ECep KMAlGyi+WrNJ6tF5Ah/aWLDfXFrhub+KW7AYkEa+0W/SnxyuG1olFQPUInIU6g== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1695419472; a=rsa-sha256; cv=none; b=fYHBVp9gijz6GYDBJ+Wo3xxnHWvvejea6BUt+DhYKk2Z79CODXiUIM9e+I9iW4ellZgAny /fzSuUSlOQ0Lk5mLlMEQXw1Z8IdwOfShLPY4tqU3qvGan2+XsbfuH7HoCjG9w2aiUuA97I LTnDp3TMZMriTPIw8kA9VZCnbNzrfXv68x2FQycb+eZ4/zE5w6NMURX2FSRYwhua8CgG0v VZV9/+3BRAkPkbr5r+TAnhHMpU7qL2CwM/MGoqG5dxIYlwnAl3bw0ztyyfCJEUj+yeJ6nd 53cW7q73d8icntqpLC1S6HBVsUJ4rPdoKretVl5eHHT8uE1w+vdJdgr1GgYI6Q== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1695419472; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=JOKAFnifKTUrmYmOaJRagYpx0djxp0T7cNUWivUdk9k=; b=W6zVHv1T5kCxlTgjVNR9POeSgRalc8vOfub//TX6avScnqpWVDgyWaaask2zZveHuhdSwp qJlJXU22CetRHDjVyYdznzumSwJ2mDMC7Bi0e1ChclonQe24sfRQEmlQ0Yt0xTxs6URz/z kCrDz7pkqvgp/wsGZXpr9On0S15MGjfB/JNnkyT6yRcrSGuojdPKYjDLRZ47ypg63ctcZ9 sD9iYX0idVGWDOATo0q4Cg2cUmjLg395lrW8bErKf+Y/3Wn5CGar5HcTj4b35nNGS+SbkT tOVt2AB+xvF9NcNhfwBzIQHDsbFzqDicxGRCPeOPfFKXH6blnCRAdHf9zAt7dw== 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 4RsmDc1d65zf3Q; Fri, 22 Sep 2023 21:51:12 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.17.1/8.17.1) with ESMTP id 38MLpChA039083; Fri, 22 Sep 2023 21:51:12 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.17.1/8.17.1/Submit) id 38MLpCOX039080; Fri, 22 Sep 2023 21:51:12 GMT (envelope-from git) Date: Fri, 22 Sep 2023 21:51:12 GMT Message-Id: <202309222151.38MLpCOX039080@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Mateusz Guzik Subject: git: 41fad6503c1e - stable/14 - vfs cache: fix a hang when bumping vnode limit too high List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-all@freebsd.org X-BeenThere: dev-commits-src-all@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: mjg X-Git-Repository: src X-Git-Refname: refs/heads/stable/14 X-Git-Reftype: branch X-Git-Commit: 41fad6503c1e5259e65d4f14110a5decb7653b02 Auto-Submitted: auto-generated The branch stable/14 has been updated by mjg: URL: https://cgit.FreeBSD.org/src/commit/?id=41fad6503c1e5259e65d4f14110a5decb7653b02 commit 41fad6503c1e5259e65d4f14110a5decb7653b02 Author: Mateusz Guzik AuthorDate: 2023-09-02 14:27:33 +0000 Commit: Mateusz Guzik CommitDate: 2023-09-22 21:50:46 +0000 vfs cache: fix a hang when bumping vnode limit too high Overflow in cache_changesize would make the value flip to 0 and stay there as 0 << 1 does not do anything. Note callers limit the outcome to something below u_int. Also note there entire vnode handling thing both in vfs layer as a whole and this file can't decide whether to long, u_long or u_int. (cherry picked from commit 32988c1499f8698b41e15ed40a46d271e757bba3) --- sys/kern/vfs_cache.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/sys/kern/vfs_cache.c b/sys/kern/vfs_cache.c index 92c926a16afb..5b0cd64146ad 100644 --- a/sys/kern/vfs_cache.c +++ b/sys/kern/vfs_cache.c @@ -2597,10 +2597,10 @@ cache_enter_time_flags(struct vnode *dvp, struct vnode *vp, struct componentname cache_enter_time(dvp, vp, cnp, tsp, dtsp); } -static u_int -cache_roundup_2(u_int val) +static u_long +cache_roundup_2(u_long val) { - u_int res; + u_long res; for (res = 1; res <= val; res <<= 1) continue; @@ -2616,7 +2616,7 @@ nchinittbl(u_long elements, u_long *hashmask) hashsize = cache_roundup_2(elements) / 2; - hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), M_VFSCACHE, M_WAITOK); + hashtbl = malloc(hashsize * sizeof(*hashtbl), M_VFSCACHE, M_WAITOK); for (i = 0; i < hashsize; i++) CK_SLIST_INIT(&hashtbl[i]); *hashmask = hashsize - 1; @@ -2762,7 +2762,7 @@ cache_changesize(u_long newmaxvnodes) struct namecache *ncp; uint32_t hash; u_long newncsize; - int i; + u_long i; newncsize = newmaxvnodes * ncsizefactor; newmaxvnodes = cache_roundup_2(newmaxvnodes * 2);