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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 CDC72C432C0 for ; Sat, 23 Nov 2019 18:05:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 94C7D2070E for ; Sat, 23 Nov 2019 18:05:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726620AbfKWSFT (ORCPT ); Sat, 23 Nov 2019 13:05:19 -0500 Received: from mail-il1-f199.google.com ([209.85.166.199]:54795 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726494AbfKWSFL (ORCPT ); Sat, 23 Nov 2019 13:05:11 -0500 Received: by mail-il1-f199.google.com with SMTP id t67so9548918ill.21 for ; Sat, 23 Nov 2019 10:05:10 -0800 (PST) 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=QvSzsqObNPAS3mGXKMyAnTJ/JpV6fD/P+fTjkQ9rKxk=; b=YBYDegHv+2DK1WN28rumGV3YS2683txYfZGsyLXhZLbg80gqSN3Nb86y0BOxLvJ4zW phx30lbOIomcjrDwc77C58d3yNkm8n1qvOVwsDxJuCu1JUKMeRg85JRPSyql2b0ZzzpI HgCnEXUpJzuPpwM+VjpVlYC5+cPPjg5sbs3cs6ygBYClfHM8b0bNSLloKHsJ/X/mcqzG N2Hg9rQJnteNay4JbZcFNBKEkLMuvxpIkIqohDLSBRU4sBFrhyl9rTnC2P1T7gewBoqk Ade1tIo1NZGaex9L30lkvSNhUmRo/Q6uwNECf6wV/eo0A4Uru0q+XoTGrqCSw+8hyhHE GGXQ== X-Gm-Message-State: APjAAAVbg1+EQT/A27FSprmUi9b/UtMjwDGyS2pAekNTGDmORMRSY0MZ qN06PUcW2vSkzKpk6kR2HgJoV7G0ouywQ+lMh79/r+8Jr7vx X-Google-Smtp-Source: APXvYqyKCGiExuzWwaH+szYcHiyGdsuXsv5/hNwq5SHdddFKPRCNAz7O8tpBNuif4TqJS4aAE68TCITaqF7F/Mh5Du+gxs8CGBiZ MIME-Version: 1.0 X-Received: by 2002:a6b:e61a:: with SMTP id g26mr19044419ioh.141.1574532309886; Sat, 23 Nov 2019 10:05:09 -0800 (PST) Date: Sat, 23 Nov 2019 10:05:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000004b2df0598075fc8@google.com> Subject: KMSAN: uninit-value in __crc32c_le_base From: syzbot To: davem@davemloft.net, glider@google.com, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 3db92f3b kmsan: process DMA pages separately in kmsan_hand.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=17bad222e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9e324dfe9c7b0360 dashboard link: https://syzkaller.appspot.com/bug?extid=6dcbfea81cd3d4dd0b02 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=128145cee00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+6dcbfea81cd3d4dd0b02@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in crc32_body lib/crc32.c:112 [inline] BUG: KMSAN: uninit-value in crc32_le_generic lib/crc32.c:179 [inline] BUG: KMSAN: uninit-value in __crc32c_le_base+0x4fa/0xd30 lib/crc32.c:202 CPU: 1 PID: 12411 Comm: syz-executor.1 Not tainted 5.4.0-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+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245 crc32_body lib/crc32.c:112 [inline] crc32_le_generic lib/crc32.c:179 [inline] __crc32c_le_base+0x4fa/0xd30 lib/crc32.c:202 chksum_update+0xb2/0x110 crypto/crc32c_generic.c:90 crypto_shash_update+0x4c5/0x530 crypto/shash.c:107 crc32c+0x150/0x220 lib/libcrc32c.c:47 sctp_csum_update+0x89/0xa0 include/net/sctp/checksum.h:36 __skb_checksum+0x1297/0x12a0 net/core/skbuff.c:2640 sctp_compute_cksum include/net/sctp/checksum.h:59 [inline] sctp_packet_pack net/sctp/output.c:528 [inline] sctp_packet_transmit+0x40fb/0x4250 net/sctp/output.c:597 sctp_outq_flush_transports net/sctp/outqueue.c:1146 [inline] sctp_outq_flush+0x1823/0x5d80 net/sctp/outqueue.c:1194 sctp_outq_uncork+0xd0/0xf0 net/sctp/outqueue.c:757 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1781 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1184 [inline] sctp_do_sm+0x8fe1/0x9720 net/sctp/sm_sideeffect.c:1155 sctp_primitive_REQUESTHEARTBEAT+0x175/0x1a0 net/sctp/primitive.c:185 sctp_apply_peer_addr_params+0x212/0x1d40 net/sctp/socket.c:2433 sctp_setsockopt_peer_addr_params net/sctp/socket.c:2686 [inline] sctp_setsockopt+0x189bb/0x19090 net/sctp/socket.c:4672 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3151 __sys_setsockopt+0x7c3/0xa30 net/socket.c:2084 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:2097 __x64_sys_setsockopt+0x62/0x80 net/socket.c:2097 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x45a639 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2a8cb65c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a639 RDX: 0000000000000009 RSI: 0000000000000084 RDI: 0000000000000004 RBP: 000000000075bfc8 R08: 0000000000000098 R09: 0000000000000000 R10: 0000000020000440 R11: 0000000000000246 R12: 00007f2a8cb666d4 R13: 00000000004d1a88 R14: 00000000004e08f0 R15: 00000000ffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:254 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:274 __msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:129 skb_put_data include/linux/skbuff.h:2217 [inline] sctp_packet_pack net/sctp/output.c:470 [inline] sctp_packet_transmit+0x1d9e/0x4250 net/sctp/output.c:597 sctp_outq_flush_transports net/sctp/outqueue.c:1146 [inline] sctp_outq_flush+0x1823/0x5d80 net/sctp/outqueue.c:1194 sctp_outq_uncork+0xd0/0xf0 net/sctp/outqueue.c:757 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1781 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1184 [inline] sctp_do_sm+0x8fe1/0x9720 net/sctp/sm_sideeffect.c:1155 sctp_primitive_REQUESTHEARTBEAT+0x175/0x1a0 net/sctp/primitive.c:185 sctp_apply_peer_addr_params+0x212/0x1d40 net/sctp/socket.c:2433 sctp_setsockopt_peer_addr_params net/sctp/socket.c:2686 [inline] sctp_setsockopt+0x189bb/0x19090 net/sctp/socket.c:4672 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3151 __sys_setsockopt+0x7c3/0xa30 net/socket.c:2084 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:2097 __x64_sys_setsockopt+0x62/0x80 net/socket.c:2097 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:254 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:274 __msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:129 skb_put_data include/linux/skbuff.h:2217 [inline] sctp_addto_chunk net/sctp/sm_make_chunk.c:1494 [inline] sctp_make_heartbeat+0x612/0x9e0 net/sctp/sm_make_chunk.c:1164 sctp_sf_heartbeat net/sctp/sm_statefuns.c:990 [inline] sctp_sf_do_prm_requestheartbeat+0x8f/0x4b0 net/sctp/sm_statefuns.c:5329 sctp_do_sm+0x2b2/0x9720 net/sctp/sm_sideeffect.c:1152 sctp_primitive_REQUESTHEARTBEAT+0x175/0x1a0 net/sctp/primitive.c:185 sctp_apply_peer_addr_params+0x212/0x1d40 net/sctp/socket.c:2433 sctp_setsockopt_peer_addr_params net/sctp/socket.c:2686 [inline] sctp_setsockopt+0x189bb/0x19090 net/sctp/socket.c:4672 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3151 __sys_setsockopt+0x7c3/0xa30 net/socket.c:2084 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:2097 __x64_sys_setsockopt+0x62/0x80 net/socket.c:2097 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:254 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:274 __msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:129 sctp_make_heartbeat+0x3e9/0x9e0 net/sctp/sm_make_chunk.c:1156 sctp_sf_heartbeat net/sctp/sm_statefuns.c:990 [inline] sctp_sf_do_prm_requestheartbeat+0x8f/0x4b0 net/sctp/sm_statefuns.c:5329 sctp_do_sm+0x2b2/0x9720 net/sctp/sm_sideeffect.c:1152 sctp_primitive_REQUESTHEARTBEAT+0x175/0x1a0 net/sctp/primitive.c:185 sctp_apply_peer_addr_params+0x212/0x1d40 net/sctp/socket.c:2433 sctp_setsockopt_peer_addr_params net/sctp/socket.c:2686 [inline] sctp_setsockopt+0x189bb/0x19090 net/sctp/socket.c:4672 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3151 __sys_setsockopt+0x7c3/0xa30 net/socket.c:2084 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:2097 __x64_sys_setsockopt+0x62/0x80 net/socket.c:2097 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:254 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:274 __msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:129 sctp_transport_init net/sctp/transport.c:47 [inline] sctp_transport_new+0x248/0xa00 net/sctp/transport.c:100 sctp_assoc_add_peer+0x5ba/0x2030 net/sctp/associola.c:611 sctp_process_param net/sctp/sm_make_chunk.c:2524 [inline] sctp_process_init+0x162b/0x3e30 net/sctp/sm_make_chunk.c:2345 sctp_cmd_process_init net/sctp/sm_sideeffect.c:667 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1374 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1184 [inline] sctp_do_sm+0x1b8b/0x9720 net/sctp/sm_sideeffect.c:1155 sctp_assoc_bh_rcv+0x65a/0xd80 net/sctp/associola.c:1048 sctp_inq_push+0x300/0x420 net/sctp/inqueue.c:80 sctp_backlog_rcv+0x2d7/0x11a0 net/sctp/input.c:344 sk_backlog_rcv include/net/sock.h:950 [inline] __release_sock+0x448/0x640 net/core/sock.c:2439 release_sock+0x99/0x2a0 net/core/sock.c:2955 sctp_wait_for_connect+0x3d7/0x840 net/sctp/socket.c:9167 __sctp_connect+0x1e9d/0x1f20 net/sctp/socket.c:1226 __sctp_setsockopt_connectx net/sctp/socket.c:1322 [inline] sctp_setsockopt_connectx_old net/sctp/socket.c:1338 [inline] sctp_setsockopt+0x960d/0x19090 net/sctp/socket.c:4647 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3151 __sys_setsockopt+0x7c3/0xa30 net/socket.c:2084 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:2097 __x64_sys_setsockopt+0x62/0x80 net/socket.c:2097 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Local variable description: ----addr.i@sctp_process_init Variable was created at: sctp_process_param net/sctp/sm_make_chunk.c:2495 [inline] sctp_process_init+0x603/0x3e30 net/sctp/sm_make_chunk.c:2345 sctp_process_param net/sctp/sm_make_chunk.c:2495 [inline] sctp_process_init+0x603/0x3e30 net/sctp/sm_make_chunk.c:2345 ===================================================== --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches