cmd: fastboot: Validate user input
In case when user provides '-' as USB controller index, like this:
=> fastboot -
data abort occurs in strcmp() function in do_fastboot(), here:
if (!strcmp(argv[1], "udp"))
(tested on BeagleBone Black).
That's because argv[1] is NULL when user types in the '-', and null
pointer dereference occurs in strcmp() (which is ok according to C
standard specification). So we must validate user input to prevent such
behavior.
While at it, check also the result of strtoul() function and handle
error cases properly.
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
1 file changed