[Devel] [PATCH] autofs: fix autofs_v5_packet structure for compat mode

[Stanislav Kinsburskiy]

Yes

31.08.2017 13:37, Konstantin Khorenko пишет:
> Will you send it to mainstream as well?
> 
> -- 
> Best regards,
> 
> Konstantin Khorenko,
> Virtuozzo Linux Kernel Team
> 
> On 08/31/2017 01:11 PM, Stanislav Kinsburskiy wrote:
>> Due to integer variables alignment size of struct autofs_v5_packet in 300
>> bytes in 32-bit architectures (instead of 304 bytes in 64-bits architectures).
>>
>> This may lead to memory corruption (64 bits kernel always send 304 bytes,
>> while 32-bit userspace application expects for 300).
>>
>> https://jira.sw.ru/browse/PSBM-71078
>>
>> Signed-off-by: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>
>> ---
>>  include/uapi/linux/auto_fs4.h |    2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/include/uapi/linux/auto_fs4.h b/include/uapi/linux/auto_fs4.h
>> index e02982f..8729a47 100644
>> --- a/include/uapi/linux/auto_fs4.h
>> +++ b/include/uapi/linux/auto_fs4.h
>> @@ -137,6 +137,8 @@ struct autofs_v5_packet {
>>      __u32 pid;
>>      __u32 tgid;
>>      __u32 len;
>> +    __u32 blob;        /* This is needed to align structure up to 8
>> +                   bytes for ALL archs including 32-bit */
>>      char name[NAME_MAX+1];
>>  };
>>
>>
>> .
>>