On 01/12/14 20:48, Ned Slider wrote:
> On 01/12/14 20:33, Jeff Hammerbacher wrote:
>> Hey,
>>
>> We are blocked on a bug fixed by RHEL in
>> https://rhn.redhat.com/errata/RHBA-2012-0362.html. Specifically, the splice
>> code in sendfile() incorrectly updating the offset position on the write
>> side, Red Hat BZ#771868.
>>
>> I have not been able to figure out if this bugfix is included in any CentOS
>> releases. If you are better at reading release notes than me, could you
>> please help me out and let me know if there's a CentOS release that
>> includes this bugfix?
>>
>> Thanks,
>> Jeff
>
> Hi Jeff,
>
> It looks like it's fixed in the current kernel.
>
> Hint: try grepping the package changelog:
>
> $ rpm -q --changelog kernel-2.6.32-504.el6.x86_64 | grep sendfile
> - [fs] Fix sendfile write-side file position (Steven Whitehouse) [770023]
> - [fs] sendfile(): check f_op.splice_write() rather than f_op.sendpage()
> (Lukas Czerner) [689426]
>
> Those entries seem to match the bug description in the errata you list
> so I'd guess it's fixed.
>
Further googling finds that it was fixed in the 6.2 kernel release, as
documented in the Technical Notes for 6.2:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.2_Technical_Notes/kernel.html
^^ Search for "sendfile" and you will find it.
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