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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 EE5CFC432BE for ; Mon, 30 Aug 2021 19:19:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD6FC60ED6 for ; Mon, 30 Aug 2021 19:19:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233128AbhH3TUU (ORCPT ); Mon, 30 Aug 2021 15:20:20 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:43893 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232138AbhH3TUT (ORCPT ); Mon, 30 Aug 2021 15:20:19 -0400 Received: by mail-io1-f69.google.com with SMTP id n14-20020a5d824e0000b02905b010868ff0so6964504ioo.10 for ; Mon, 30 Aug 2021 12:19:26 -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:message-id:subject:from:to; bh=6RP0xIpJkpUpuQ8zTmp1h0IIspFRUFwWbe3VrI5AA/Y=; b=NC8dXF/n32vPkFznidyeLvb+eneRr7lOvw0p3Ycq9vOFQhP4M0AXeLOKxQ5dIZTZwB N49qfy2GCIVAbvbNZvqu/gQ1H3CTZo/RkPcSL3IKz2y/Oc+EGiZKCF4oQfqTaJ1VZS1x vYMATbkIV1IzIH2+ySDinU77V4RNEx8e/yUNYs/NTihg8DorBYQpWe5awBIHrmA4W2LT mb/o6IflXapKaDGlgTEmuoMjKZ8JKSxZTkKLZozVEbnKuma90jyxjY5btlhXcqcF83yG +NmZA6uLZhbxfm9WTGQv7DPUU1jtR1bH6fX1iCLXKP9CWzNG2st9mUQTPAfw39zSLe7k JN3w== X-Gm-Message-State: AOAM533KHAkccymU3hBt6ET3XCdjYBCB4obhDunb5rBngKSm+vYg4cNK uZfzS6ZRE4JJPFomnvmwsBewRubB4aXiWqyiykLeZLJUpuOm X-Google-Smtp-Source: ABdhPJx9PNyCiIwofl/EjJEnTQxN70bccUaoPeDBna3+HVxh4tXJERAy00pVfGmF6Z3oOTCYzu5NCG57qd17hSEshDZPaf4ooI4H MIME-Version: 1.0 X-Received: by 2002:a92:cb0f:: with SMTP id s15mr17264650ilo.59.1630351165304; Mon, 30 Aug 2021 12:19:25 -0700 (PDT) Date: Mon, 30 Aug 2021 12:19:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000011360d05cacbb622@google.com> Subject: [syzbot] general protection fault in sock_from_file From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 93717cde744f Add linux-next specific files for 20210830 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15b851fe300000 kernel config: https://syzkaller.appspot.com/x/.config?x=c643ef5289990dd1 dashboard link: https://syzkaller.appspot.com/bug?extid=f9704d1878e290eddf73 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f9704d1878e290eddf73@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 1 PID: 6072 Comm: syz-executor.0 Not tainted 5.14.0-next-20210830-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:sock_from_file+0x20/0x90 net/socket.c:505 Code: f5 ff ff ff c3 0f 1f 44 00 00 41 54 53 48 89 fb e8 85 e9 62 fa 48 8d 7b 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 4f 45 31 e4 48 81 7b 28 80 f1 8a 8a 74 0c e8 58 e9 RSP: 0018:ffffc9000a2df8e8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002f91000 RDX: 0000000000000005 RSI: ffffffff8713203b RDI: 0000000000000028 RBP: ffff8880983c2c80 R08: ffffffff899aee40 R09: ffffffff81e21978 R10: 0000000000000027 R11: 0000000000000009 R12: dffffc0000000000 R13: 1ffff11013078599 R14: 0000000000000003 R15: ffff8880983c2c80 FS: 00007fe7b0454700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005591dffa5180 CR3: 00000000974cb000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_sendmsg+0x98/0x640 fs/io_uring.c:4681 io_issue_sqe+0x14de/0x6ba0 fs/io_uring.c:6578 __io_queue_sqe+0x90/0xb50 fs/io_uring.c:6864 io_req_task_submit+0xbf/0x1b0 fs/io_uring.c:2218 tctx_task_work+0x166/0x610 fs/io_uring.c:2143 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_signal include/linux/tracehook.h:212 [inline] handle_signal_work kernel/entry/common.c:146 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x256/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe7b0454188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000001000 RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 000000000000688c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fffeee6585f R14: 00007fe7b0454300 R15: 0000000000022000 Modules linked in: ---[ end trace 6f9e359dd487b8fa ]--- RIP: 0010:sock_from_file+0x20/0x90 net/socket.c:505 Code: f5 ff ff ff c3 0f 1f 44 00 00 41 54 53 48 89 fb e8 85 e9 62 fa 48 8d 7b 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 4f 45 31 e4 48 81 7b 28 80 f1 8a 8a 74 0c e8 58 e9 RSP: 0018:ffffc9000a2df8e8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002f91000 RDX: 0000000000000005 RSI: ffffffff8713203b RDI: 0000000000000028 RBP: ffff8880983c2c80 R08: ffffffff899aee40 R09: ffffffff81e21978 R10: 0000000000000027 R11: 0000000000000009 R12: dffffc0000000000 R13: 1ffff11013078599 R14: 0000000000000003 R15: ffff8880983c2c80 FS: 00007fe7b0454700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb81002c710 CR3: 00000000974cb000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: ff c3 inc %ebx 2: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 7: 41 54 push %r12 9: 53 push %rbx a: 48 89 fb mov %rdi,%rbx d: e8 85 e9 62 fa callq 0xfa62e997 12: 48 8d 7b 28 lea 0x28(%rbx),%rdi 16: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1d: fc ff df 20: 48 89 fa mov %rdi,%rdx 23: 48 c1 ea 03 shr $0x3,%rdx * 27: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2b: 75 4f jne 0x7c 2d: 45 31 e4 xor %r12d,%r12d 30: 48 81 7b 28 80 f1 8a cmpq $0xffffffff8a8af180,0x28(%rbx) 37: 8a 38: 74 0c je 0x46 3a: e8 .byte 0xe8 3b: 58 pop %rax 3c: e9 .byte 0xe9 --- 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.