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 25843C4338F for ; Mon, 16 Aug 2021 13:31:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A94860F46 for ; Mon, 16 Aug 2021 13:31:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240993AbhHPNbv (ORCPT ); Mon, 16 Aug 2021 09:31:51 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:37611 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241542AbhHPN3t (ORCPT ); Mon, 16 Aug 2021 09:29:49 -0400 Received: by mail-io1-f69.google.com with SMTP id h3-20020a056602008300b005b7c0e23e11so1209207iob.4 for ; Mon, 16 Aug 2021 06:29:17 -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=SPj4+myJ8JzhjGfXTTH/Z+OtZy43EqV2wJdhxiY1nKw=; b=Vt1u6BhXwCrHYgwzFS/zyCMnK0u2m3PFtaxBurXfUb6T8EJlGFDV1O5kcF95Fihvy5 p/9/BcbqUkbUpI/+wWNnEMnO6GWkeVDTQKOflySEa0PXjeCjPjQXVtmH8XlGQS1iYFty JnSJlR4agLVGqz71MY/cpepu9AmAcNwQp/KwyYbXk5/TDDc9XsjLUxuj5EKAboSmn/Gz HZu336b0A/Vv+qv0aIm0PDgDua03cYyOwi3t6QIlMlrOsf0O6a7N92RSiBRfptfAcq4V gP19WW5ABqv9fDgI3gjUipGnH3DJxd2OiSQPf2FfN1xM7ZFrKkB2yGJyqcGfZxkLRFvy Bm3A== X-Gm-Message-State: AOAM532mLomULggL/oIDXNlxvMt2o7aiuedt67g+g96mtr58YCbQxG0C INhlCdWyo2eA68b7tPccDIIAzQoOV9NFMm09+wRmkuGgNB/C X-Google-Smtp-Source: ABdhPJzdFf1fUonPWgBMICFHQ9n+A3WIhVwouHe1nI1iOJn6/OQWrzU3ZXPFaBWCxwkT67w9KcFotwb20V+bX6r8Rpt1g/Z81EAI MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a4f:: with SMTP id u15mr11985302ilv.251.1629120557493; Mon, 16 Aug 2021 06:29:17 -0700 (PDT) Date: Mon, 16 Aug 2021 06:29:17 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000020339705c9ad30ee@google.com> Subject: [syzbot] general protection fault in __io_queue_sqe From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: b9011c7e671d Add linux-next specific files for 20210816 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15474781300000 kernel config: https://syzkaller.appspot.com/x/.config?x=a245d1aa4f055cc1 dashboard link: https://syzkaller.appspot.com/bug?extid=2b85e9379c34945fe38f 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+2b85e9379c34945fe38f@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f] CPU: 0 PID: 6232 Comm: syz-executor.1 Not tainted 5.14.0-rc5-next-20210816-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__io_req_set_refcount fs/io_uring.c:1152 [inline] RIP: 0010:__io_prep_linked_timeout fs/io_uring.c:1348 [inline] RIP: 0010:io_prep_linked_timeout fs/io_uring.c:1356 [inline] RIP: 0010:__io_queue_sqe+0x278/0xeb0 fs/io_uring.c:6708 Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 07 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 70 49 8d 7c 24 58 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 3e 0b 00 00 45 8b 74 24 58 31 RSP: 0018:ffffc9000a9ffd48 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 1ffff9200153ffb0 RCX: ffffc9000ba6a000 RDX: 000000000000000b RSI: ffffffff81e1bcbf RDI: 0000000000000058 RBP: ffff888037d15dc0 R08: 0000000000000001 R09: ffff888037d15e1f R10: ffffed1006fa2bc3 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888037d15e30 R15: ffff888037d15e30 FS: 00007fb490054700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000388c5000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_req_task_submit+0xaa/0x120 fs/io_uring.c:2139 tctx_task_work+0x106/0x540 fs/io_uring.c:2063 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: 0033:0x4665e9 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:00007fb490054188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000081 RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 00000000000045f5 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe3ce9ca1f R14: 00007fb490054300 R15: 0000000000022000 Modules linked in: ---[ end trace 221813d58846ad59 ]--- RIP: 0010:__io_req_set_refcount fs/io_uring.c:1152 [inline] RIP: 0010:__io_prep_linked_timeout fs/io_uring.c:1348 [inline] RIP: 0010:io_prep_linked_timeout fs/io_uring.c:1356 [inline] RIP: 0010:__io_queue_sqe+0x278/0xeb0 fs/io_uring.c:6708 Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 07 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 70 49 8d 7c 24 58 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 3e 0b 00 00 45 8b 74 24 58 31 RSP: 0018:ffffc9000a9ffd48 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 1ffff9200153ffb0 RCX: ffffc9000ba6a000 RDX: 000000000000000b RSI: ffffffff81e1bcbf RDI: 0000000000000058 RBP: ffff888037d15dc0 R08: 0000000000000001 R09: ffff888037d15e1f R10: ffffed1006fa2bc3 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888037d15e30 R15: ffff888037d15e30 FS: 00007fb490054700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3213a000 CR3: 00000000388c5000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 fa mov %edi,%edx 2: 48 c1 ea 03 shr $0x3,%rdx 6: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) a: 0f 85 07 0c 00 00 jne 0xc17 10: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 17: fc ff df 1a: 4c 8b 65 70 mov 0x70(%rbp),%r12 1e: 49 8d 7c 24 58 lea 0x58(%r12),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e 3e 0b 00 00 jle 0xb78 3a: 45 8b 74 24 58 mov 0x58(%r12),%r14d 3f: 31 .byte 0x31 --- 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.