From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f200.google.com (mail-oi1-f200.google.com [209.85.167.200]) (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 0048D301471 for ; Fri, 17 Apr 2026 19:11:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776453076; cv=none; b=S1HGv1D+fnlgrVY34etUBbkQcIa3H7W+YTfFhm3E31+T5qU16gdHiPTPS6tFqxTL15p0UerqI+z7Vpm65vZiJznHc/z5lOMCS/XXVXAlDZ1ZY/M9uR/ihrXazhm5VgwgyEfmr4l79ecCJ1mw1jGhNDwmKg0GDFDMC4mkw6Q4qjU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776453076; c=relaxed/simple; bh=ftC6BPfGIx3taO4ljyibI4C3i8DnMaVIg9OxQJBzx9k=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=jYwEtcYRTiAuI2Anh0YmhBsW0Qb8OCDyeKcgo7sUaw9B8j8jNKnfXI+wv6b/O/2aVBUCAl0jBTTTKaGzRibbUgDUaC5runA20EOgePWMqeKEmEL0Hcqqb6gyFOvwtPW5yUiQkjx0xi0IBlNp4kaZ9Sv799x9g9Uwp2vu43QPDtM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f200.google.com with SMTP id 5614622812f47-467e8aaa943so946733b6e.0 for ; Fri, 17 Apr 2026 12:11:14 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776453074; x=1777057874; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=GEJUZateKR/tcw9Y9Z5eUXSmTabutVxUNS0zA7P5moY=; b=MB4a50DFExgCyGU3hsurdTBVaCxpTVX3CS/3bYIf6u8BzA/25v0sOJma9g+i92deXK 0w/bf5FKyhlQO7qNzIQSP8oef/tL7NBM6ZmKCdsCLOcU5gkbFiwhJfwToPFyMjYiuJ6S MCxFXhK3AvXBHsE2EsDrkA2TFMHA/QK0Z0lOlyDLtT1HXTG+YmW32Gm529x51HmhmW78 Kker4D3eAlxJNE00nxxCpt/x4u806MgXoVDjuSO8+26wqAGVt7X7mfCPlp4y3nkxo2/G D2SSTwbplbW8elRyn94SnM+jJqdH8Z06GW8M3zAOaN8UipOxKgZw/+bwwEXfpI6+Woil iWMw== X-Gm-Message-State: AOJu0YxWvdldxrH4I+lGW9wERlLIYy1qKcB8Kz4oIIlJFDUgafvdcer5 ek5sFdi+YAleoDCSyJx1LaVjrJUYPR71yXyeBaKLf4pYBy+5R4gbVdDX6ofU4Gd7+lgtfehEHYi z5AKMDESIzTUGYLc3+qR8FsoSLFIuf8VbkooVpNRuGy6MnFmi4fXZNi0mSOY= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1621:b0:68c:3af3:6e60 with SMTP id 006d021491bc7-69462ee3114mr2352759eaf.38.1776453073982; Fri, 17 Apr 2026 12:11:13 -0700 (PDT) Date: Fri, 17 Apr 2026 12:11:13 -0700 In-Reply-To: <69727142.050a0220.706b.0027.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69e285d1.a00a0220.1bd0ca.001d.GAE@google.com> Subject: Forwarded: Re: [syzbot] [jfs?] KMSAN: uninit-value in txLock From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [syzbot] [jfs?] KMSAN: uninit-value in txLock Author: tristmd@gmail.com #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c index XXXXXXX..XXXXXXX 100644 --- a/fs/jfs/jfs_metapage.c +++ b/fs/jfs/jfs_metapage.c @@ -174,14 +174,10 @@ static inline struct metapage *alloc_metapage(gfp_t gfp_mask) { struct metapage *mp = mempool_alloc(metapage_mempool, gfp_mask); - if (mp) { - mp->lid = 0; - mp->lsn = 0; - mp->data = NULL; - mp->clsn = 0; - mp->log = NULL; + if (mp) { + memset(mp, 0, sizeof(*mp)); init_waitqueue_head(&mp->wait); - } + } return mp; } diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c index XXXXXXX..XXXXXXX 100644 --- a/fs/jfs/jfs_txnmgr.c +++ b/fs/jfs/jfs_txnmgr.c @@ -295,7 +295,7 @@ int txInit(void) * tlock id = 0 is reserved. */ size = sizeof(struct tlock) * nTxLock; - TxLock = vmalloc(size); + TxLock = vzalloc(size); if (TxLock == NULL) { vfree(TxBlock); return -ENOMEM; @@ -660,7 +660,10 @@ struct tlock *txLock(tid_t tid, struct inode *ip, struct metapage * mp, for (last = jfs_ip->atlhead; lid_to_tlock(last)->next != lid; last = lid_to_tlock(last)->next) { - assert(last); + if (!last) { + jfs_err("txLock: lid %d not found in atl list", lid); + goto grantLock; + } } lid_to_tlock(last)->next = tlck->next; if (jfs_ip->atltail == lid)