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cadence_uart: Fix buffer overflow 

Report from smatch:
hw/cadence_uart.c:413 uart_read(13) error: buffer overflow 's->r' 18 <= 18

This fixes read access to s->r[R_MAX] which is behind the limits of s->r.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
This commit is contained in:
Stefan Weil 2012-09-01 11:12:23 +02:00 committed by Stefan Hajnoczi
parent 39b384591f
commit 5d40097fc0
1 changed files with 1 additions and 1 deletions
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2
hw/cadence_uart.c
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@ -404,7 +404,7 @@ static uint64_t uart_read(void *opaque, target_phys_addr_t offset,
uint32_t c = 0;
offset >>= 2;
if (offset > R_MAX) {
if (offset >= R_MAX) {
return 0;
} else if (offset == R_TX_RX) {
uart_read_rx_fifo(s, &c);