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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 18E59C48BD7 for ; Thu, 27 Jun 2019 17:14:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E628320659 for ; Thu, 27 Jun 2019 17:14:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726601AbfF0ROH (ORCPT ); Thu, 27 Jun 2019 13:14:07 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:46393 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id 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MIME-Version: 1.0 X-Received: by 2002:a6b:f00c:: with SMTP id w12mr5714279ioc.280.1561655645648; Thu, 27 Jun 2019 10:14:05 -0700 (PDT) Date: Thu, 27 Jun 2019 10:14:05 -0700 In-Reply-To: <000000000000a97a15058c50c52e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000053e16058c514a2d@google.com> Subject: Re: KMSAN: uninit-value in aesti_encrypt From: syzbot To: aviadye@mellanox.com, borisp@mellanox.com, daniel@iogearbox.net, davejwatson@fb.com, davem@davemloft.net, ebiggers@kernel.org, glider@google.com, herbert@gondor.apana.org.au, john.fastabend@gmail.com, 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"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 41550654 [UPSTREAM] KVM: x86: degrade WARN to pr_warn_rate.. git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=11302ccba00000 kernel config: https://syzkaller.appspot.com/x/.config?x=40511ad0c5945201 dashboard link: https://syzkaller.appspot.com/bug?extid=6f50c99e8f6194bf363f compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12906f79a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14355961a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+6f50c99e8f6194bf363f@syzkaller.appspotmail.com ================================================================== BUG: KMSAN: uninit-value in subshift crypto/aes_ti.c:148 [inline] BUG: KMSAN: uninit-value in aesti_encrypt+0x1238/0x1bc0 crypto/aes_ti.c:292 CPU: 0 PID: 11119 Comm: syz-executor333 Not tainted 5.2.0-rc4+ #7 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+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan.c:611 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:304 subshift crypto/aes_ti.c:148 [inline] aesti_encrypt+0x1238/0x1bc0 crypto/aes_ti.c:292 crypto_cipher_encrypt_one include/linux/crypto.h:1753 [inline] crypto_cbcmac_digest_update+0x3cf/0x550 crypto/ccm.c:871 crypto_shash_update crypto/shash.c:107 [inline] shash_ahash_finup+0x659/0xb20 crypto/shash.c:276 shash_async_finup+0xbb/0x110 crypto/shash.c:291 crypto_ahash_op+0x1cd/0x6e0 crypto/ahash.c:368 crypto_ahash_finup+0x8c/0xb0 crypto/ahash.c:393 crypto_ccm_auth+0x14b2/0x1570 crypto/ccm.c:230 crypto_ccm_encrypt+0x272/0x8d0 crypto/ccm.c:309 crypto_aead_encrypt include/crypto/aead.h:331 [inline] tls_do_encryption net/tls/tls_sw.c:521 [inline] tls_push_record+0x341a/0x4f70 net/tls/tls_sw.c:730 bpf_exec_tx_verdict+0x1454/0x1c90 net/tls/tls_sw.c:770 tls_sw_sendmsg+0x15bd/0x2740 net/tls/tls_sw.c:1033 inet_sendmsg+0x48e/0x750 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg net/socket.c:665 [inline] __sys_sendto+0x905/0xb90 net/socket.c:1958 __do_sys_sendto net/socket.c:1970 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:1966 __x64_sys_sendto+0x6e/0x90 net/socket.c:1966 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x4402d9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffcef4112e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402d9 RDX: ffffffffffffff7f RSI: 00000000200005c0 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000000 R09: fffffffffffffd56 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b60 R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:201 [inline] kmsan_save_stack mm/kmsan/kmsan.c:213 [inline] kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:414 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:200 __crypto_xor+0x1e8/0x1470 crypto/algapi.c:1019 crypto_xor include/crypto/algapi.h:214 [inline] crypto_cbcmac_digest_update+0x2ba/0x550 crypto/ccm.c:865 crypto_shash_update crypto/shash.c:107 [inline] shash_ahash_finup+0x659/0xb20 crypto/shash.c:276 shash_async_finup+0xbb/0x110 crypto/shash.c:291 crypto_ahash_op+0x1cd/0x6e0 crypto/ahash.c:368 crypto_ahash_finup+0x8c/0xb0 crypto/ahash.c:393 crypto_ccm_auth+0x14b2/0x1570 crypto/ccm.c:230 crypto_ccm_encrypt+0x272/0x8d0 crypto/ccm.c:309 crypto_aead_encrypt include/crypto/aead.h:331 [inline] tls_do_encryption net/tls/tls_sw.c:521 [inline] tls_push_record+0x341a/0x4f70 net/tls/tls_sw.c:730 bpf_exec_tx_verdict+0x1454/0x1c90 net/tls/tls_sw.c:770 tls_sw_sendmsg+0x15bd/0x2740 net/tls/tls_sw.c:1033 inet_sendmsg+0x48e/0x750 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg net/socket.c:665 [inline] __sys_sendto+0x905/0xb90 net/socket.c:1958 __do_sys_sendto net/socket.c:1970 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:1966 __x64_sys_sendto+0x6e/0x90 net/socket.c:1966 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was created at: kmsan_save_stack_with_flags+0x37/0x70 mm/kmsan/kmsan.c:201 kmsan_internal_alloc_meta_for_pages+0x123/0x510 mm/kmsan/kmsan_hooks.c:103 kmsan_alloc_page+0x7a/0xf0 mm/kmsan/kmsan_hooks.c:247 __alloc_pages_nodemask+0x144d/0x6020 mm/page_alloc.c:4700 alloc_pages_current+0x6a0/0x9b0 mm/mempolicy.c:2132 alloc_pages include/linux/gfp.h:511 [inline] skb_page_frag_refill+0x15e/0x560 net/core/sock.c:2349 sk_page_frag_refill+0xa4/0x330 net/core/sock.c:2369 sk_msg_alloc+0x203/0x1050 net/core/skmsg.c:37 tls_alloc_encrypted_msg net/tls/tls_sw.c:284 [inline] tls_sw_sendmsg+0xb6a/0x2740 net/tls/tls_sw.c:953 inet_sendmsg+0x48e/0x750 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg net/socket.c:665 [inline] __sys_sendto+0x905/0xb90 net/socket.c:1958 __do_sys_sendto net/socket.c:1970 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:1966 __x64_sys_sendto+0x6e/0x90 net/socket.c:1966 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ==================================================================