[U-Boot] fs/fs.c - error handling needed?

[Tom Rini]

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On 10/07/2013 09:55 AM, Wolfgang Denk wrote:
> Dear Tom,
> 
> In message <20131007121252.GS15917 at bill-the-cat> you wrote:
>> 
>>> 331         filename = argv[3]; 332         addr =
>>> simple_strtoul(argv[4], NULL, cmdline_base); 333         bytes
>>> = simple_strtoul(argv[5], NULL, cmdline_base); 334         if
>>> (argc >= 7) 335                 pos = simple_strtoul(argv[6],
>>> NULL, cmdline_base); 336         else 337                 pos =
>>> 0;
>>> 
>>> 
>>> Should we not perform at least minimal error checking, i. e.
>>> verify that no garbage arguments have been passed to that
>>> function?
>> 
>> Yes, we ought to.  If you don't pass fatwrite the right number
>> of arguments we get data aborts, for example.
> 
> Well, this is not a problem here, in do_save():
> 
> ... 325         if (argc < 6 || argc > 7) 326
> return CMD_RET_USAGE; ...
> 
> And are you sure of "fatwrite"?  This calls do_fat_fswrite(). and
> here I also see some test:
> 
> ... 98         if (argc < 5) 99                 return
> cmd_usage(cmdtp); ...

Off-by-one error somewhere? 'mmc' 'part' 'ddr-addr' 'filename' will
blowup as we use an insane value for size.  I suspect we aren't eating
'fatwrite' somewhere along the line.

- -- 
Tom
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