From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f69.google.com (mail-ot1-f69.google.com [209.85.210.69]) (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 D8D3828C87C for ; Fri, 17 Apr 2026 18:49:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776451744; cv=none; b=gDkjB2///0eEDsE6z8kgu55syBuhYgNnvLjAUuEiTspv+uwldcJThD6VM/eV8d2azQWzlaFyFn+6RtukM3/AXxONzUI4MWBavc405/CgOShWzySvEMYI/xhDtQODirclbPI51iawZ6E/l41FvwCPdi9f6GzzvaHg02CHmyEoh1k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776451744; c=relaxed/simple; bh=UgZYD6bZJqDAJZXagrk7QcNhTb7ZWuTiqfGGe6UDQCY=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=rP9PV7c+S7HBM6fJSImvo1cNFdyTmaHciLvt+6K984TNFyjaN4MW6OCzK7ZpQdEUGkNX191PPrM8S5D0YQhPU+sQWbs4lZuqHl4Ca2esAbzzXXpURRE/zL2qK2drV56TJ+50qFRk6yT6K8kqEiL/XeOJIbFMxNZd98iCM5h82rY= 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=209.85.210.69 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-ot1-f69.google.com with SMTP id 46e09a7af769-7d7e995a87cso2867562a34.1 for ; Fri, 17 Apr 2026 11:49:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776451742; x=1777056542; 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=AlWLNNkWt3Lc5zG1MzA8R2yRgKd2h78S4NdbHvIFH7E=; b=I4xaccXZPEBqZ1J1J9l2VR0PhyxwElu36xuSeYwL1hyAi3fDA7mMnZFlTJgJsf/4hf SugwD46/cNg/KgxMZG10GsHlG1s2Hk3CDnn3JjpkHtruzIHUPlqA/RYUIMZljQe/Qz3O IiR+KNgACop9RZ0EcP/dgow00906bXxw935YmkY1ntWkUyt+P7tuTAPOcg6L7NNKonir 3eG5O3iDwsEthshPU1gSqvl3tWBCu2DEmkufuU/UvKHUnPms6yKOlQMO8ctXe9IOJtwf csVszZdHtJZP/jabGioCh8dmAlXrOmO0wZi+zfoF6HRYKXNdHrCRyc8UyGXUYopQdf8F 7ygg== X-Gm-Message-State: AOJu0YwAykzOBOGimIom7V0smj/+kW1+T/NCzVqJaJ3/EBxs9jngJPh0 7iXvqhT0BNoSgbz/OavFicMCeYiYnro1AuxewMBxVbAnVcZqLfVyd5S7YOp2yUN9BKwvYUKdh+b MYHfwZW3DQbUMlJm8vxRFZIO98HA4GfyklYiab0bW9QVJfNGcAoG7eRICQAE= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:82a:b0:685:5300:f1c2 with SMTP id 006d021491bc7-69462ebb6a5mr2512486eaf.28.1776451741915; Fri, 17 Apr 2026 11:49:01 -0700 (PDT) Date: Fri, 17 Apr 2026 11:49:01 -0700 In-Reply-To: <177644276543.3783661.2549646862156202244@talencesecurity.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69e2809d.050a0220.1de265.0031.GAE@google.com> Subject: Re: [syzbot] [jfs?] KMSAN: uninit-value in txLock From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tristmd@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in txLock ip: ffff8880139c57b8: 139c57b0 ffff8880 00000000 00000000 ip: ffff8880139c57c8: 00000000 00000000 00000000 00000000 ip: ffff8880139c57d8: 00000000 00000000 ===================================================== BUG: KMSAN: uninit-value in hex_dump_to_buffer+0xe86/0xeb0 lib/hexdump.c:172 hex_dump_to_buffer+0xe86/0xeb0 lib/hexdump.c:172 print_hex_dump+0x10d/0x330 lib/hexdump.c:277 txLock+0xe8f/0x29d0 fs/jfs/jfs_txnmgr.c:832 xtInsert+0xd25/0x1530 fs/jfs/jfs_xtree.c:645 extAlloc+0x12ec/0x17e0 fs/jfs/jfs_extent.c:150 jfs_get_block+0x610/0xe30 fs/jfs/inode.c:254 get_more_blocks fs/direct-io.c:648 [inline] do_direct_IO fs/direct-io.c:936 [inline] __blockdev_direct_IO+0x281f/0x6100 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3133 [inline] jfs_direct_IO+0x12b/0x3f0 fs/jfs/inode.c:339 generic_file_direct_write+0x2bc/0x730 mm/filemap.c:4258 __generic_file_write_iter+0x25b/0x460 mm/filemap.c:4427 generic_file_write_iter+0x131/0x980 mm/filemap.c:4467 iter_file_splice_write+0x12d8/0x20c0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x31a/0x7d0 fs/splice.c:1159 splice_direct_to_actor+0x9a3/0x1560 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x1e0/0x350 fs/splice.c:1228 do_sendfile+0x9fc/0x1130 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x1e3/0x280 fs/read_write.c:1419 __x64_sys_sendfile64+0xbd/0x120 fs/read_write.c:1419 x64_sys_call+0x3aa4/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: hex_dump_to_buffer+0xe7f/0xeb0 lib/hexdump.c:174 print_hex_dump+0x10d/0x330 lib/hexdump.c:277 txLock+0xe8f/0x29d0 fs/jfs/jfs_txnmgr.c:832 xtInsert+0xd25/0x1530 fs/jfs/jfs_xtree.c:645 extAlloc+0x12ec/0x17e0 fs/jfs/jfs_extent.c:150 jfs_get_block+0x610/0xe30 fs/jfs/inode.c:254 get_more_blocks fs/direct-io.c:648 [inline] do_direct_IO fs/direct-io.c:936 [inline] __blockdev_direct_IO+0x281f/0x6100 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3133 [inline] jfs_direct_IO+0x12b/0x3f0 fs/jfs/inode.c:339 generic_file_direct_write+0x2bc/0x730 mm/filemap.c:4258 __generic_file_write_iter+0x25b/0x460 mm/filemap.c:4427 generic_file_write_iter+0x131/0x980 mm/filemap.c:4467 iter_file_splice_write+0x12d8/0x20c0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x31a/0x7d0 fs/splice.c:1159 splice_direct_to_actor+0x9a3/0x1560 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x1e0/0x350 fs/splice.c:1228 do_sendfile+0x9fc/0x1130 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x1e3/0x280 fs/read_write.c:1419 __x64_sys_sendfile64+0xbd/0x120 fs/read_write.c:1419 x64_sys_call+0x3aa4/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4576 [inline] slab_alloc_node mm/slub.c:4898 [inline] kmem_cache_alloc_noprof+0x373/0x1250 mm/slub.c:4905 mempool_alloc_slab+0x36/0x50 mm/mempool.c:722 mempool_alloc_noprof+0x19d/0x3c0 mm/mempool.c:566 alloc_metapage fs/jfs/jfs_metapage.c:264 [inline] __get_metapage+0xa20/0x1840 fs/jfs/jfs_metapage.c:761 xtSplitRoot+0x164/0x1560 fs/jfs/jfs_xtree.c:1242 xtSplitUp+0x8c2/0x2ea0 fs/jfs/jfs_xtree.c:785 xtInsert+0x77a/0x1530 fs/jfs/jfs_xtree.c:608 extAlloc+0x12ec/0x17e0 fs/jfs/jfs_extent.c:150 jfs_get_block+0x610/0xe30 fs/jfs/inode.c:254 get_more_blocks fs/direct-io.c:648 [inline] do_direct_IO fs/direct-io.c:936 [inline] __blockdev_direct_IO+0x281f/0x6100 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3133 [inline] jfs_direct_IO+0x12b/0x3f0 fs/jfs/inode.c:339 generic_file_direct_write+0x2bc/0x730 mm/filemap.c:4258 __generic_file_write_iter+0x25b/0x460 mm/filemap.c:4427 generic_file_write_iter+0x131/0x980 mm/filemap.c:4467 iter_file_splice_write+0x12d8/0x20c0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x31a/0x7d0 fs/splice.c:1159 splice_direct_to_actor+0x9a3/0x1560 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x1e0/0x350 fs/splice.c:1228 do_sendfile+0x9fc/0x1130 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x1e3/0x280 fs/read_write.c:1419 __x64_sys_sendfile64+0xbd/0x120 fs/read_write.c:1419 x64_sys_call+0x3aa4/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 6587 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 ===================================================== Tested on: commit: d662a710 Merge tag 'dmaengine-7.1-rc1' of git://git.ke.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master console output: https://syzkaller.appspot.com/x/log.txt?x=14daa4ce580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5aa0042346eface8 dashboard link: https://syzkaller.appspot.com/bug?extid=d3a57c32b9112d7b01ec compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=171624ce580000