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Ensure valid buf access

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This commit is contained in:
Stefan Rueger
2024-04-17 14:31:11 +01:00
parent f6842c9000
commit 8fddac70eb
1 changed files with 2 additions and 1 deletions
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3
src/avrftdi.c
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@@ -894,6 +894,7 @@ static int avrftdi_cmd(const PROGRAMMER *pgm, const unsigned char *cmd, unsigned
static int avrftdi_program_enable(const PROGRAMMER *pgm, const AVRPART *p) {
int i;
unsigned char buf[4];
int polli = p->pollindex - 1, pollok = polli >= 0 && polli < (int) sizeof buf;
memset(buf, 0, sizeof(buf));
@@ -906,7 +907,7 @@ static int avrftdi_program_enable(const PROGRAMMER *pgm, const AVRPART *p) {
for(i = 0; i < 4; i++) {
pgm->cmd(pgm, buf, buf);
if (buf[p->pollindex-1] != p->pollvalue) {
if (pollok && buf[polli] != p->pollvalue) {
pmsg_warning("program enable command not successful%s\n", i < 3? "; retrying": "");
set_pin(pgm, PIN_AVR_RESET, ON);
usleep(20);