qemu /
qemu /
046aba169bc21c08823cfbe8d4f3b4ad116ac676 gdbstub: Reject invalid RLE repeat counts
"Debugging with GDB / Appendix E GDB Remote Serial Protocol /
Overview" specifies "The printable characters '#' and '$' or with a
numeric value greater than 126 must not be used." gdb_read_byte()
only rejects values < 32. This is wrong. Impact depends on the caller:
* gdb_handlesig() passes a char. Incorrectly accepts '#', '$' and
'\127'.
* gdb_chr_receive() passes an uint8_t. Additionally accepts
characters with the most-significant bit set.
Correct the validity check to match the specification.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190514180311.16028-4-armbru@redhat.com>
1 file changed