From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DEDC9C433E7 for ; Wed, 22 Jul 2020 05:53:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3E1220771 for ; Wed, 22 Jul 2020 05:53:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728524AbgGVFxe (ORCPT ); Wed, 22 Jul 2020 01:53:34 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:34446 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726696AbgGVFxU (ORCPT ); Wed, 22 Jul 2020 01:53:20 -0400 Received: by mail-io1-f69.google.com with SMTP id 127so1134172iou.1 for ; Tue, 21 Jul 2020 22:53:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=vMI+b0QwNKlbP0/ucj1u+tlneVHkQXvpxz2P0D6PK8s=; b=TlqGQ2MqIIHU7ppYZiCoTobMKlP5EGdMHtmnUHFQPCeryN53Q5VD0Ps+vc1NF73nn6 ym7gcGukLAseXy5CvsynMoUxhBfNRUZLx4ec7Isqg4RXUgdgO0IETPzXk2E/4M0zDjo4 GaOVMBuQTjb0Zxa8z+bex4JWs0OBXqrjD25zHbO7s5wmj2CNZf8eY+xnJG7KM6lN9HCU /adZuZkMwlrc7n5M99ucNsKBiFUqV1+35Sob+M64lzqLmDUm0DxSRtBqfgRftrsD1uOb b/H5RXaXjH9Q6GZgr39QqIGZQeAjp2It9SlbaDWJgS4WdN9QkagWjbKWDmsuYy/DLhCK mptw== X-Gm-Message-State: AOAM530opfF4Ew3kT2CNn+wl28Y5HRHKjBKnqu02sjdiUpT1d/qoIHC1 uPS3gIQTDT3y6R0kr0PoMQZC73aH+80NBsvpn4H0XTsHZdXc X-Google-Smtp-Source: ABdhPJw35bTKefxEro2HR8zMrQL+kwCYSOF3wnVLtRlBV7cZn8JvkcKXN8Tk+aXwpnMZnpwBNCMdMKNProUSNTiikyw1qYRmmEsG MIME-Version: 1.0 X-Received: by 2002:a02:95ca:: with SMTP id b68mr36860918jai.0.1595397199619; Tue, 21 Jul 2020 22:53:19 -0700 (PDT) Date: Tue, 21 Jul 2020 22:53:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000005be99c05ab015bd0@google.com> Subject: KMSAN: uninit-value in xa_load From: syzbot To: dledford@redhat.com, glider@google.com, jgg@ziepe.ca, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 14525656 compiler.h: reinstate missing KMSAN_INIT git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=105d7320900000 kernel config: https://syzkaller.appspot.com/x/.config?x=c534a9fad6323722 dashboard link: https://syzkaller.appspot.com/bug?extid=086ab5ca9eafd2379aa6 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1303736f100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12096087100000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+086ab5ca9eafd2379aa6@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in xas_start lib/xarray.c:190 [inline] BUG: KMSAN: uninit-value in xas_load lib/xarray.c:233 [inline] BUG: KMSAN: uninit-value in xa_load+0x83b/0x8a0 lib/xarray.c:1305 CPU: 0 PID: 8440 Comm: syz-executor560 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1df/0x240 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 xas_start lib/xarray.c:190 [inline] xas_load lib/xarray.c:233 [inline] xa_load+0x83b/0x8a0 lib/xarray.c:1305 _ucma_find_context drivers/infiniband/core/ucma.c:139 [inline] ucma_get_ctx+0x7f/0x310 drivers/infiniband/core/ucma.c:152 ucma_get_ctx_dev drivers/infiniband/core/ucma.c:175 [inline] ucma_accept+0x259/0xc90 drivers/infiniband/core/ucma.c:1148 ucma_write+0x5c5/0x630 drivers/infiniband/core/ucma.c:1764 do_loop_readv_writev fs/read_write.c:737 [inline] do_iter_write+0x710/0xdc0 fs/read_write.c:1020 vfs_writev fs/read_write.c:1091 [inline] do_writev+0x42d/0x8f0 fs/read_write.c:1134 __do_sys_writev fs/read_write.c:1207 [inline] __se_sys_writev+0x9b/0xb0 fs/read_write.c:1204 __x64_sys_writev+0x4a/0x70 fs/read_write.c:1204 do_syscall_64+0xb0/0x150 arch/x86/entry/common.c:386 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4402e9 Code: Bad RIP value. RSP: 002b:00007fffa058a4f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402e9 RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0 R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 Local variable ----cmd@ucma_accept created at: ucma_accept+0x95/0xc90 drivers/infiniband/core/ucma.c:1137 ucma_accept+0x95/0xc90 drivers/infiniband/core/ucma.c:1137 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches