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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 9CC50C4338F for ; Fri, 13 Aug 2021 10:04:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A1B160F21 for ; Fri, 13 Aug 2021 10:04:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239672AbhHMKEl (ORCPT ); Fri, 13 Aug 2021 06:04:41 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:50907 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239736AbhHMKDw (ORCPT ); Fri, 13 Aug 2021 06:03:52 -0400 Received: by mail-io1-f71.google.com with SMTP id x3-20020a5e83030000b02905ab3247bec3so4511635iom.17 for ; Fri, 13 Aug 2021 03:03:26 -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:in-reply-to:message-id:subject :from:to; bh=PwHnua1MRSkM55cL5lJZc/tqOzaEJb9p+ZlZGQxsT/0=; b=f4m8AjBdnn+Mgj/H8jgZn2Ke/TIs0J2t0d098Nxh+UiLMxyhbQ0sIVsYIO3e+LBJRF 2vkzGQHg+rLu9Sjq+XjJIijFc5fUeMimHAf05WN56HjTwk7jPL3RY1y1fuuOOZiMEiEQ ShA57NeW7sf6IJjcKDBHNy3i2zhsPz3RWZwlJQPB6k8G6SXUxfO7mqCN5mYn3T5v+HxD yBiZPNG8uwSiYDZIvRsjrey0wH1kyEA1cKAqCCYlTlMA0WlYebGPgbHsMlVtfiEe3csy 2Uz365p9mwL1wS24Z3/LPDZiGDKOhZuog+st2xaBC1FNum5vMRIM2HoMFxGrVTq4KmDd FbWA== X-Gm-Message-State: AOAM531/X3Fh0VDTNy1xbA5TzwxAsHZp9lSsYQmUYqVvhUAwoItsf16y I1yuDpaV5Wg00jo9WlO/ZEDJcbfeIb9wC7Bt0PficfaTbdxQ X-Google-Smtp-Source: ABdhPJxI8Q8KjD/NRrrnotWgA7SBp0CNhrx/fugxw5gwc9SHcW7aPk5G9LIwfX0QYP9TaLLrKkL80/fJWfwkYNEk/8xELY8W2qwr MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1d89:: with SMTP id h9mr1188392ila.46.1628849006091; Fri, 13 Aug 2021 03:03:26 -0700 (PDT) Date: Fri, 13 Aug 2021 03:03:26 -0700 In-Reply-To: <00000000000006e7be05bda1c084@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000066a78105c96df6a3@google.com> Subject: Re: [syzbot] general protection fault in scatterwalk_copychunks (4) From: syzbot To: davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: f8fbb47c6e86 Merge branch 'for-v5.14' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11d1a779300000 kernel config: https://syzkaller.appspot.com/x/.config?x=171d57d5a48c8cad dashboard link: https://syzkaller.appspot.com/bug?extid=66e3ea42c4b176748b9c compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13b8db9e300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c21581300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+66e3ea42c4b176748b9c@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 58 Comm: kworker/u4:3 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: pencrypt_parallel padata_parallel_worker RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:68 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:88 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:77 [inline] RIP: 0010:scatterwalk_copychunks+0x4db/0x6a0 crypto/scatterwalk.c:50 Code: ff df 80 3c 02 00 0f 85 b4 01 00 00 49 8d 44 24 08 4d 89 26 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 77 01 00 00 48 b8 00 00 00 00 RSP: 0018:ffffc900011d7628 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83d3dc23 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88801903a69b R10: ffffffff83d3dbd3 R11: 0000000000086088 R12: 0000000000000000 R13: 0000000000000001 R14: ffffc900011d7888 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000100 CR3: 000000001d355000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skcipher_next_slow crypto/skcipher.c:278 [inline] skcipher_walk_next+0x7af/0x1680 crypto/skcipher.c:363 skcipher_walk_first+0xf8/0x3c0 crypto/skcipher.c:446 skcipher_walk_aead_common+0x7a5/0xbc0 crypto/skcipher.c:539 gcmaes_crypt_by_sg+0x31d/0x890 arch/x86/crypto/aesni-intel_glue.c:658 gcmaes_encrypt+0xe2/0x230 arch/x86/crypto/aesni-intel_glue.c:722 generic_gcmaes_encrypt+0x12e/0x190 arch/x86/crypto/aesni-intel_glue.c:1071 crypto_aead_encrypt+0xaa/0xf0 crypto/aead.c:94 crypto_aead_encrypt+0xaa/0xf0 crypto/aead.c:94 pcrypt_aead_enc+0x13/0x70 crypto/pcrypt.c:82 padata_parallel_worker+0x60/0xb0 kernel/padata.c:157 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 process_scheduled_works kernel/workqueue.c:2338 [inline] worker_thread+0x85c/0x11f0 kernel/workqueue.c:2424 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace d7f7427ae496b704 ]--- RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:68 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:88 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:77 [inline] RIP: 0010:scatterwalk_copychunks+0x4db/0x6a0 crypto/scatterwalk.c:50 Code: ff df 80 3c 02 00 0f 85 b4 01 00 00 49 8d 44 24 08 4d 89 26 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 77 01 00 00 48 b8 00 00 00 00 RSP: 0018:ffffc900011d7628 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83d3dc23 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88801903a69b R10: ffffffff83d3dbd3 R11: 0000000000086088 R12: 0000000000000000 R13: 0000000000000001 R14: ffffc900011d7888 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000100 CR3: 000000000b68e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: df 80 3c 02 00 0f filds 0xf00023c(%rax) 6: 85 b4 01 00 00 49 8d test %esi,-0x72b70000(%rcx,%rax,1) d: 44 24 08 rex.R and $0x8,%al 10: 4d 89 26 mov %r12,(%r14) 13: 48 89 c2 mov %rax,%rdx 16: 48 89 44 24 18 mov %rax,0x18(%rsp) 1b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 22: fc ff df 25: 48 c1 ea 03 shr $0x3,%rdx 29: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2d: 84 c0 test %al,%al 2f: 74 08 je 0x39 31: 3c 03 cmp $0x3,%al 33: 0f 8e 77 01 00 00 jle 0x1b0 39: 48 rex.W 3a: b8 00 00 00 00 mov $0x0,%eax