From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753701AbeD3BAG (ORCPT ); Sun, 29 Apr 2018 21:00:06 -0400 Received: from mail-io0-f197.google.com ([209.85.223.197]:33545 "EHLO mail-io0-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751061AbeD3BAC (ORCPT ); Sun, 29 Apr 2018 21:00:02 -0400 X-Google-Smtp-Source: AB8JxZpWxSvKKv1yybolxtEU5csNINc6IE5Et/v/j56DhpjsJeM2gvS60vzz7WqFAZXsYbMDYznWXWnhg0/6GT9buuCRfxBa1ozk MIME-Version: 1.0 Date: Sun, 29 Apr 2018 18:00:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a52337056b065fb3@google.com> Subject: WARNING in md_ioctl From: syzbot To: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, shli@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot hit the following crash on upstream commit c61a56ababa404961fa769a2b24229f18e461961 (Sun Apr 29 17:06:05 2018 +0000) Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=1e46a0864c1a6e9bd3d8 C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5771999158730752 syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=6399853584187392 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=6389218171420672 Kernel config: https://syzkaller.appspot.com/x/.config?id=4617060493481910265 compiler: gcc (GCC) 8.0.1 20180413 (experimental) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1e46a0864c1a6e9bd3d8@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) md: md0 stopped. md: md0 stopped. WARNING: CPU: 1 PID: 4511 at drivers/md/md.c:7188 md_ioctl+0x3427/0x6360 drivers/md/md.c:7188 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 4511 Comm: syz-executor107 Not tainted 4.17.0-rc2+ #24 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+0x1b9/0x294 lib/dump_stack.c:113 panic+0x22f/0x4de kernel/panic.c:184 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:md_ioctl+0x3427/0x6360 drivers/md/md.c:7188 RSP: 0018:ffff8801ad9b7400 EFLAGS: 00010293 RAX: ffff8801acf7a540 RBX: 0000000000000932 RCX: ffffffff8565f354 RDX: 0000000000000000 RSI: ffffffff85661c37 RDI: 0000000000000007 RBP: ffff8801ad9b79c0 R08: ffff8801acf7a540 R09: ffffed0039894699 R10: ffff8801ad9b73f0 R11: ffff8801cc4a34cf R12: 0000000000000932 R13: ffff8801cc4a3328 R14: ffff8801ad9b7998 R15: 0000000000000001 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x9b6/0x2020 block/ioctl.c:601 block_ioctl+0xee/0x130 fs/block_dev.c:1877 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x445a59 RSP: 002b:00007f00dd147da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445a59 RDX: 0000000020000080 RSI: 0000000000000932 RDI: 0000000000000003 RBP: 00000000006dac3c R08: 00007f00dd148700 R09: 0000000000000000 R10: 00007f00dd148700 R11: 0000000000000246 R12: 00000000006dac38 R13: 30646d2f7665642f R14: 00007f00dd1489c0 R15: 0000000000000003 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. 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