From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DE32D69D2E; Wed, 21 Feb 2024 13:28:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708522091; cv=none; b=sjeGFBH0csk5XUApXd7F9GoEB0055fVcqD7e7TvWkMoatjC9x8icdTTrd5I22ouSNAbovqLeyVgbTpcZg0cQpqoLGvqdQ0ETG1RAR1PR3Xt8NYccoo56cSO9ZFgJWsxZ3CEhm/Mva3lGPAWUEbuc8x4Gu2E79JcYwxHEsg8KIRQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708522091; c=relaxed/simple; bh=vCGdqXEvD4NEYIHXEkbco1vnh1FMn034pJP+hvby3u8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TDozNLsOUndYx296V4vicquTldBgtRXlnhHgxlYZn351qWsvNzK+UoJm0DjeY6UrbppDe/4/QVQV2ZesjTsgs3BViRRaz0xWXg2qgfFUVb03h9NzhoHPUlMxWB9sX86mPscggxvE7ekL7Dh2+l7VPKhHAxqOdMmjBheqCAm41zk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nwNDJ71d; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="nwNDJ71d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C219C433C7; Wed, 21 Feb 2024 13:28:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1708522090; bh=vCGdqXEvD4NEYIHXEkbco1vnh1FMn034pJP+hvby3u8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nwNDJ71dEnSkngMWTlAuBNCaXz9mUPN05eJQ8mKzq6dtJq/4tvBglozy2dpUHWoyE gPa9PJmzuNct4kKCuLdxTu27Uz+w3UeQNgZQx3SUthpskKNeSCdzhP/64n7XPBCxTg adnGkxFGGgx7patX8121Z8eZ+R2TMfir00z1i3Gc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+be14ed7728594dc8bd42@syzkaller.appspotmail.com, syzbot+c563a3c79927971f950f@syzkaller.appspotmail.com, Anand Jain , Fedor Pchelkin , David Sterba Subject: [PATCH 5.15 077/476] btrfs: ref-verify: free ref cache before clearing mount opt Date: Wed, 21 Feb 2024 14:02:08 +0100 Message-ID: <20240221130010.832237283@linuxfoundation.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240221130007.738356493@linuxfoundation.org> References: <20240221130007.738356493@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fedor Pchelkin commit f03e274a8b29d1d1c1bbd7f764766cb5ca537ab7 upstream. As clearing REF_VERIFY mount option indicates there were some errors in a ref-verify process, a ref cache is not relevant anymore and should be freed. btrfs_free_ref_cache() requires REF_VERIFY option being set so call it just before clearing the mount option. Found by Linux Verification Center (linuxtesting.org) with Syzkaller. Reported-by: syzbot+be14ed7728594dc8bd42@syzkaller.appspotmail.com Fixes: fd708b81d972 ("Btrfs: add a extent ref verify tool") CC: stable@vger.kernel.org # 5.4+ Closes: https://lore.kernel.org/lkml/000000000000e5a65c05ee832054@google.com/ Reported-by: syzbot+c563a3c79927971f950f@syzkaller.appspotmail.com Closes: https://lore.kernel.org/lkml/0000000000007fe09705fdc6086c@google.com/ Reviewed-by: Anand Jain Signed-off-by: Fedor Pchelkin Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/ref-verify.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/fs/btrfs/ref-verify.c +++ b/fs/btrfs/ref-verify.c @@ -883,8 +883,10 @@ int btrfs_ref_tree_mod(struct btrfs_fs_i out_unlock: spin_unlock(&fs_info->ref_verify_lock); out: - if (ret) + if (ret) { + btrfs_free_ref_cache(fs_info); btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); + } return ret; } @@ -1013,8 +1015,8 @@ int btrfs_build_ref_tree(struct btrfs_fs } } if (ret) { - btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); btrfs_free_ref_cache(fs_info); + btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); } btrfs_free_path(path); return ret;