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

[Li Qiang]

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



<address@hidden> 于2018年12月14日周五 上午12:01写道：

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