From nobody Mon Dec 1 21:30:57 2025 Received: from mail-pl1-f178.google.com (mail-pl1-f178.google.com [209.85.214.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 40BA52D97BC for ; Mon, 1 Dec 2025 11:43:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.178 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764589412; cv=none; b=UJl2b9LGn8deWfT+7AEOxTqxzQ0h4ZvjakhiXBifwBcw87xFKiau3od7xIKqEQpheC8Xvf9hLrTRi+aRnLpjXKhhk/Pllr8tbdnkxZ91ous7aetzQ2sIlb6oECc33auN3MZJCphkyfRSf6TlF2a8X1cYRM6RKEuynYgFp5llMwg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764589412; c=relaxed/simple; bh=KN/sMBFY22iUXIq38dFJGiUgyVdtQV2nI1plYk3m1lQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=DeU9rvKJdHsW1klfm1SOeF4sLXMU6wI8AQ/mzI+a+KTEfpv256zM1yBVdjXvB8po2g9FT55B2FSvm1odilyRG/7iC2Vi6zkgIfZaXkcNY5jhACn7NejnF0jb2G6/S9FVwqpEE7GsBrZYz6OesJ5UFWiamWk8eswZtVQR+lcZVaY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Az/UDxjy; arc=none smtp.client-ip=209.85.214.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Az/UDxjy" Received: by mail-pl1-f178.google.com with SMTP id d9443c01a7336-29586626fbeso50979325ad.0 for ; Mon, 01 Dec 2025 03:43:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1764589410; x=1765194210; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hCKgBcPoalAy6f5rN4zp1ApZDY6VFFjy7LxYreKO+gg=; b=Az/UDxjyHTeT62R0g6Qny5wzP7CnUrnfWsAN3Dpo14IS6qNePTO0WevKWkuaD7AytB arqvoFhOSuFYGmqN+ZftLn/JaoHvvXWmqZnQrprlklZKKeQd7i+sTsLepEoZBgbN6lh6 2OEE0aeC1lP+qZQP75OOCcjXqEOKbXKm8RsEX57rjnjsmTkH1OrC69KEDqI5rXOKNxb1 DKYUwVdTeVsCW1MihYtOyeZXyuZYV3ZwFMyXSbp2hUoEUIgAHxCsEP5bgeToLdFkZc/P mqEtCylIkBHu7/ZuKCfozHlSAIog8lzPmkwpHpQNCv293KywRpxf8fXZsvX2HjKpz3Hw o7nA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764589410; x=1765194210; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=hCKgBcPoalAy6f5rN4zp1ApZDY6VFFjy7LxYreKO+gg=; b=ZThoHGTTUrdlt6dZEBNkQUa80ukCh7a8Gn4pr43vnVh5ax2Yv46SScAhdhoOUBh4cI YLyJ+Y0uPrW+ed5NiV+a6HDAWGVxsLeFjVSJWJlfwpA8Jl99818JjNFy/XGKULWEX6a/ 6SaFHrYdnS7Hf6GGQLKU3LlKqjizvjq8JvadYHEdHCxV8nTj1k6ijzpL6lm7WVOQ5a4u vlim1iik1VUwiDpxg0eAMNrkUDh44ptp8IF2NmMi9I4hQfoBLujRDdl5BcZgGKZAymM/ v03s0bmfFUlj/0PZsp96TiX0eULWjsziGJ8C6WCCMtQvyQXr0mJ8qwuQnUuesD3BbPkd hG4Q== X-Gm-Message-State: AOJu0YyRkevORwcHaRuGIUFSmt9RPM+a3ACIr+E9MZibAmsolstzRAXE m1rimfw5P5tmIxogrRe03c3B2xg6jDhhAiaHRGx0H39wfVeHV6l2+jTo X-Gm-Gg: ASbGncuQ3PL4CcoWB0YDb4ixb9zboRfe9cOVLYubqTkDVUIW4QTwLTL67i5qNwO+A0q z59guwF0FRpUaFy5iUXD9Fhl6lGgcRKbyt0oWVsJSTx7xLgHLqUbHIH2/InETnD2qBsW7wgGYP/ 1WAInLQRU+qUVhVZXx7fkaSAPs3ncU4Gw5nOjDqActpNBnyee1SzDXWZVREGb6L5LjHVR+5EG6R z4uJ12EsSj39T4gx82XYflNHJsBXgdg6HaUTLkDq20EgoGV1YpeKBtR1NEz62VQIbq9o8eUAtW1 ByqIPed56++OaEtLZAwUrbBOkQlT/MSjBmdkSSmoe3QxzUP/xl7mmS5tp0I6fVY0kjlF9nkUca9 KPjdGDBJ6h4a+wexrk57uMLs6NHgVSvaQ9OBITlOVyjcYWAgNd5fs7LzqP33rfBlBNH2dtuBsZx cccQdOCSaz7oh6eRWzjTBGO6hwwXc= X-Google-Smtp-Source: AGHT+IH3VyWoWSAzlZRlnmZUyiSjGpj2h1ooG28qgJGo6+8xqNmFAExebW4QEuZcT2FB4hHKpueTeA== X-Received: by 2002:a17:902:f548:b0:295:4d97:84fc with SMTP id d9443c01a7336-29b6bf3bcc0mr399042665ad.32.1764589410402; Mon, 01 Dec 2025 03:43:30 -0800 (PST) Received: from localhost.localdomain ([114.79.136.226]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29bceb4026bsm121775295ad.71.2025.12.01.03.43.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Dec 2025 03:43:30 -0800 (PST) From: Prithvi Tambewagh To: syzbot+96d38c6e1655c1420a72@syzkaller.appspotmail.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, mark@fasheh.com Cc: linux-kernel@vger.kernel.org, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com, Prithvi Tambewagh Subject: Syzbot test for v3: ocfs2: fix kernel BUG in ocfs2_find_victim_chain Date: Mon, 1 Dec 2025 17:13:21 +0530 Message-Id: <20251201114321.121153-1-activprithvi@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <000000000000560ff106204134d2@google.com> References: <000000000000560ff106204134d2@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git = 939f15e640f193616691d3bcde0089760e75b0d3 Signed-off-by: Prithvi Tambewagh --- fs/ocfs2/suballoc.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c index 6ac4dcd54588..6c2c33a26056 100644 --- a/fs/ocfs2/suballoc.c +++ b/fs/ocfs2/suballoc.c @@ -1992,6 +1992,15 @@ static int ocfs2_claim_suballoc_bits(struct ocfs2_al= loc_context *ac, } =20 cl =3D (struct ocfs2_chain_list *) &fe->id2.i_chain; + if (!le16_to_cpu(cl->cl_next_free_rec) || + le16_to_cpu(cl->cl_next_free_rec) > le16_to_cpu(cl->cl_count)) { + status =3D ocfs2_error(ac->ac_inode->i_sb, + "Chain allocator dinode %llu has invalid next " + "free chain record %u, but only %u total\n", + (unsigned long long)le64_to_cpu(fe->i_blkno), + le16_to_cpu(cl->cl_next_free_rec), + le16_to_cpu(cl->cl_count)); + } =20 victim =3D ocfs2_find_victim_chain(cl); ac->ac_chain =3D victim; base-commit: 939f15e640f193616691d3bcde0089760e75b0d3 --=20 2.34.1