From nobody Thu Oct 07 22:53:43 2021 X-Original-To: dev-commits-src-main@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 B9C2712DAB0A; Thu, 7 Oct 2021 22:53:43 +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 4HQRSl4s4sz3HLf; Thu, 7 Oct 2021 22:53:43 +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 865811C0E3; Thu, 7 Oct 2021 22:53:43 +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 197MrhpT023101; Thu, 7 Oct 2021 22:53:43 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 197MrhTj023100; Thu, 7 Oct 2021 22:53:43 GMT (envelope-from git) Date: Thu, 7 Oct 2021 22:53:43 GMT Message-Id: <202110072253.197MrhTj023100@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Kirk McKusick Subject: git: 4313e2ae44ba - main - Avoid lost buffers in fsck_ffs. List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-main@freebsd.org X-BeenThere: dev-commits-src-main@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: mckusick X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 4313e2ae44ba4e416a7ddaeaccf8ad311902f1c8 Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch main has been updated by mckusick: URL: https://cgit.FreeBSD.org/src/commit/?id=4313e2ae44ba4e416a7ddaeaccf8ad311902f1c8 commit 4313e2ae44ba4e416a7ddaeaccf8ad311902f1c8 Author: Kirk McKusick AuthorDate: 2021-10-07 22:51:56 +0000 Commit: Kirk McKusick CommitDate: 2021-10-07 22:52:58 +0000 Avoid lost buffers in fsck_ffs. The ino_blkatoff() and indir_blkatoff() functions failed to release the buffers holding second and third level indirect blocks. This commit ensures that these buffers are now properly released. MFC after: 1 week Sponsored by: Netflix --- sbin/fsck_ffs/inode.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/sbin/fsck_ffs/inode.c b/sbin/fsck_ffs/inode.c index ba2d5892238e..dafc99bd92da 100644 --- a/sbin/fsck_ffs/inode.c +++ b/sbin/fsck_ffs/inode.c @@ -264,6 +264,8 @@ ino_blkatoff(union dinode *dp, ino_t ino, ufs_lbn_t lbn, int *frags, int i; *frags = 0; + if (bpp != NULL) + *bpp = NULL; /* * Handle extattr blocks first. */ @@ -300,6 +302,8 @@ ino_blkatoff(union dinode *dp, ino_t ino, ufs_lbn_t lbn, int *frags, continue; if (lbn > 0 && lbn >= next) continue; + if (DIP(dp, di_ib[i]) == 0) + return (0); return (indir_blkatoff(DIP(dp, di_ib[i]), ino, -cur - i, lbn, bpp)); } @@ -321,8 +325,6 @@ indir_blkatoff(ufs2_daddr_t blk, ino_t ino, ufs_lbn_t cur, ufs_lbn_t lbn, ufs_lbn_t base; int i, level; - if (blk == 0) - return (0); level = lbn_level(cur); if (level == -1) pfatal("Invalid indir lbn %jd in ino %ju\n", @@ -352,12 +354,14 @@ indir_blkatoff(ufs2_daddr_t blk, ino_t ino, ufs_lbn_t cur, ufs_lbn_t lbn, return (0); blk = IBLK(bp, i); bp->b_index = i; - if (bpp != NULL) - *bpp = bp; - else - brelse(bp); - if (cur == lbn) + if (cur == lbn || blk == 0) { + if (bpp != NULL) + *bpp = bp; + else + brelse(bp); return (blk); + } + brelse(bp); if (level == 0) pfatal("Invalid lbn %jd at level 0 for ino %ju\n", lbn, (uintmax_t)ino);