Re: [Qemu-devel] [PATCH v2] util: check the return value of fcntl in qemu_set_{block, nonblock}

[Li Qiang <liq3ea@gmail.com>]

Hi all,

Here is the error.

  GTESTER check-qtest-x86_64
Unable to get file status flag on fd 21860: Bad file descriptor(errno=9)
  GTESTER check-qtest-aarch64
Broken pipe
GTester: last random seed: R02S3f0d6981dd97231d06e0b2966baf94b9
Unable to get file status flag on fd 21965: Bad file descriptor(errno=9)
Broken pipe
GTester: last random seed: R02S29fde958e7ee4c26c4f295ff4dbd47d4
Unable to get file status flag on fd 21890: Bad file descriptor(errno=9)
Broken pipe
GTester: last random seed: R02S6d074187e5c8501255c96b247f5c8e3f
Unable to get file status flag on fd 21923: Bad file descriptor(errno=9)
Broken pipe
GTester: last random seed: R02S446127f38eb9e8b4f181e6fc95026ba0
  GTESTER tests/test-qht-par
Could not access KVM kernel module: No such file or directory


The fd '21860' '21965', '21890', '21923' is a little strange. Following is
my guess.

21280 --> 0x5564
21965 --> 0x55CD
21890 --> 0x5582
21923 --> 0x55A3

Seems they are stack uninitialized value which 'fd's memory holds.
Seems 'qemu_chr_fe_get_msgfds' first failed, then the 'fd' is an
uninitialized value
cause my first patch 'assert' fails.

Thanks,
Li Qiang



<no-reply@patchew.org> 于2018年12月14日周五 上午12:01写道：

> Patchew URL:
> https://patchew.org/QEMU/1544701071-2922-1-git-send-email-liq3ea@gmail.com/
>
>
>
> Hi,
>
> This series failed the docker-quick@centos7 build test. Please find the
> testing commands and
> their output below. If you have Docker installed, you can probably
> reproduce it
> locally.
>
> === TEST SCRIPT BEGIN ===
> #!/bin/bash
> time make docker-test-quick@centos7 SHOW_ENV=1 J=8
> === TEST SCRIPT END ===
>
> libpmem support   no
> libudev           no
>
> WARNING: Use of SDL 1.2 is deprecated and will be removed in
> WARNING: future releases. Please switch to using SDL 2.0
>
> NOTE: cross-compilers enabled:  'cc'
>   GEN     x86_64-softmmu/config-devices.mak.tmp
>
>
> The full log is available at
>
> http://patchew.org/logs/1544701071-2922-1-git-send-email-liq3ea@gmail.com/testing.docker-quick@centos7/?type=message
> .
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