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openFPGALoader
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Fix potential array out‑of‑bounds access 

Signed-off-by: Qi Zhou <atmgnd@outlook.com>
This commit is contained in:
Qi Zhou 2026-01-21 20:10:57 +08:00
parent e72b413947
commit f91e4be231
1 changed files with 9 additions and 6 deletions
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13
src/ch347jtag.cpp
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@ -249,14 +249,17 @@ int CH347Jtag::_setClkFreq(uint32_t clkHZ)
uint32_t *ptr = _is_largerPack ? speed_clock_larger_pack : speed_clock_standard_pack; uint32_t *ptr = _is_largerPack ? speed_clock_larger_pack : speed_clock_standard_pack;
int size = (_is_largerPack?sizeof(speed_clock_larger_pack):sizeof(speed_clock_standard_pack)) / sizeof(uint32_t); int size = (_is_largerPack?sizeof(speed_clock_larger_pack):sizeof(speed_clock_standard_pack)) / sizeof(uint32_t);
for (int i = 0; i < size; ++i) { for (int i = 0; i < size; ++i) {
if (clkHZ > ptr[i] && clkHZ <= ptr[i+1]){ if (clkHZ >= ptr[i] ){
setClk_index = i + 1; setClk_index = i;
} else {
break;
} }
} }
if (setClk(setClk_index)) { if (setClk(setClk_index)) {
printError("failed to set clock rate"); printError("failed to set clock rate");
return 0; return 0;
} }
_clkHZ = ptr[setClk_index];
char mess[256]; char mess[256];
snprintf(mess, 256, "JTAG TCK frequency set to %.3f MHz\n\n", (double)ptr[setClk_index] / MHZ(1)); snprintf(mess, 256, "JTAG TCK frequency set to %.3f MHz\n\n", (double)ptr[setClk_index] / MHZ(1));
printInfo(mess); printInfo(mess);
@ -333,7 +336,7 @@ int CH347Jtag::toggleClk(uint8_t tms, uint8_t tdi, uint32_t len)
ptr = obuf; ptr = obuf;
} }
} }
return EXIT_SUCCESS; return len;
} }
int CH347Jtag::writeTDI(const uint8_t *tx, uint8_t *rx, uint32_t len, bool end) int CH347Jtag::writeTDI(const uint8_t *tx, uint8_t *rx, uint32_t len, bool end)
@ -381,7 +384,7 @@ int CH347Jtag::writeTDI(const uint8_t *tx, uint8_t *rx, uint32_t len, bool end)
} }
unsigned actual_length; unsigned actual_length;
if (bits == 0) if (bits == 0)
return EXIT_SUCCESS; return len;
cmd = (rx) ? CMD_BITS_WR : CMD_BITS_WO; cmd = (rx) ? CMD_BITS_WR : CMD_BITS_WO;
if (get_obuf_length() < (int)(4 + bits * 2)) { if (get_obuf_length() < (int)(4 + bits * 2)) {
flush(); flush();
@ -427,5 +430,5 @@ int CH347Jtag::writeTDI(const uint8_t *tx, uint8_t *rx, uint32_t len, bool end)
*rptr &= ~(0x01 << i); *rptr &= ~(0x01 << i);
} }
} }
return EXIT_SUCCESS; return len;
} }