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 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 7DDCEC432BE for ; Tue, 31 Aug 2021 22:05:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5B5F86102A for ; Tue, 31 Aug 2021 22:05:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232930AbhHaWGT (ORCPT ); Tue, 31 Aug 2021 18:06:19 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:52854 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230286AbhHaWGS (ORCPT ); Tue, 31 Aug 2021 18:06:18 -0400 Received: by mail-io1-f71.google.com with SMTP id e18-20020a6b7312000000b005be766a70dbso326040ioh.19 for ; Tue, 31 Aug 2021 15:05:23 -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=a8wS8La3XxEogcajdJZCQlNQNh7GcJyYpgdD6AtRXmM=; b=BfGiZnUc/NzGoLuqgeNly0UZNBAQUZAkcRPlKSWzKPu7jcVHouOuvUvvKwa5+Q6iGO H6qwIqS1cpB2TCrv1T3qyvBAo2SjJzEB7UtRHx7C3AArYqQp39MqX+xVTRiMMJQgu6lW eyUSV25oXNiZYtosb9Y4gMOZXvzB8rZCm7t4n1ROlEZAdf0z9rhKvYaWgLvuE1o0kFMu qvkarq1ZGHYw+GiEvJQRvpm2sK1fAVTvx+nts+uaXgET4EZvDIYdBJ2WUGIwB+T5MzA/ IimAho1WA0szI+P3ORoCSFDZfOmOnd2y8Hx1Wbw4RB+w/DR7IrylWLEiaKHusJaKqN2J To1Q== X-Gm-Message-State: AOAM533gypCNnznzVi2KeKldQ8Z9y95hLcLzE5N0HXbjTe2rc4ThXvqg Z12kPZq77jTeHh5c2Dc5KWGFQpQs5bt0A4r1fbC96HdplDN8 X-Google-Smtp-Source: ABdhPJwJXFBbWWQUdtsbteM4dz4QX0pxE+wvhYmcC738h2dw+tFVL4xJ5mWdzUqMH8AoHbFeZNkGswoWt4k8wcHN7FlkF1vnwGES MIME-Version: 1.0 X-Received: by 2002:a92:7108:: with SMTP id m8mr22206148ilc.238.1630447522885; Tue, 31 Aug 2021 15:05:22 -0700 (PDT) Date: Tue, 31 Aug 2021 15:05:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006d354305cae2253f@google.com> Subject: [syzbot] general protection fault in __io_file_supports_nowait 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: 9c849ce86e0f Merge tag '5.15-rc-smb3-fixes-part1' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16eead75300000 kernel config: https://syzkaller.appspot.com/x/.config?x=bf588afb178273fb dashboard link: https://syzkaller.appspot.com/bug?extid=e51249708aaa9b0e4d2c 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+e51249708aaa9b0e4d2c@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 1 PID: 13658 Comm: syz-executor.1 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:file_inode include/linux/fs.h:1344 [inline] RIP: 0010:__io_file_supports_nowait+0x26/0x500 fs/io_uring.c:2785 Code: 00 00 00 00 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 6f 61 96 ff 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 2d 04 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b RSP: 0018:ffffc90003247948 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000008 RCX: ffffc9000b8c4000 RDX: 0000000000000004 RSI: ffffffff81dfb791 RDI: 0000000000000020 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc90003247a00 R10: ffffffff81e293dc R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000001 FS: 00007fd0a23d1700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000014a53ad CR3: 000000002ebbe000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_file_supports_nowait fs/io_uring.c:2823 [inline] io_file_supports_nowait fs/io_uring.c:2816 [inline] io_write+0x4cf/0xed0 fs/io_uring.c:3545 io_issue_sqe+0x289/0x6ba0 fs/io_uring.c:6563 __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:00007fd0a23d1188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000200 RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 00000000000045f5 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 0000000000a9fb1f R14: 00007fd0a23d1300 R15: 0000000000022000 Modules linked in: ---[ end trace 2fda19a8d1802890 ]--- RIP: 0010:file_inode include/linux/fs.h:1344 [inline] RIP: 0010:__io_file_supports_nowait+0x26/0x500 fs/io_uring.c:2785 Code: 00 00 00 00 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 6f 61 96 ff 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 2d 04 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b RSP: 0018:ffffc90003247948 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000008 RCX: ffffc9000b8c4000 RDX: 0000000000000004 RSI: ffffffff81dfb791 RDI: 0000000000000020 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc90003247a00 R10: ffffffff81e293dc R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000001 FS: 00007fd0a23d1700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000512630 CR3: 000000002ebbe000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 41 55 push %r13 6: 41 54 push %r12 8: 41 89 f4 mov %esi,%r12d b: 55 push %rbp c: 48 89 fd mov %rdi,%rbp f: 53 push %rbx 10: e8 6f 61 96 ff callq 0xff966184 15: 48 8d 7d 20 lea 0x20(%rbp),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 2d 04 00 00 jne 0x461 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 4c rex.WR 3f: 8b .byte 0x8b --- This report is generated by a bot. 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