Subject: Re: bug#25149: md5sum fails with message "Invalid argument" on 4, 294, 967, 295-byte files in FAT32

From: Pádraig Brady <[email-masked]>
Date: Fri, 9 Dec 2016 19:22:20 +0000

tag 25149 notabug
close 25149
stop

On 09/12/16 18:28, Jaime Gaspar wrote:
>    read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = 32767

OK we've read all we can, but to verify md5sum will do:
  fread(buffer + 32767, 1, 1, stream)

Then the stdio stream will issue the underlying read()s
I'm not too sure where there are two reads here,
but they shouldn't be returning EINVAL, but just
returning 0 to indicate EOF.

>    read(3, 0x25c12b0, 8192)                = -1 EINVAL (Invalid argument)
>    read(3, 0x25c12b0, 8192)                = -1 EINVAL (Invalid argument)

So it's a kernel bug as suspected.

thanks,
Pádraig