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-rw-r--r--common/cmd_sf.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 9c76464..5ac1d0c 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -211,6 +211,13 @@ static int do_spi_flash_read_write(int argc, char * const argv[])
if (*argv[3] == 0 || *endp != 0)
return -1;
+ /* Consistency checking */
+ if (offset + len > flash->size) {
+ printf("ERROR: attempting %s past flash size (%#x)\n",
+ argv[0], flash->size);
+ return 1;
+ }
+
buf = map_physmem(addr, len, MAP_WRBACK);
if (!buf) {
puts("Failed to map physical memory\n");
@@ -252,6 +259,13 @@ static int do_spi_flash_erase(int argc, char * const argv[])
if (ret != 1)
return -1;
+ /* Consistency checking */
+ if (offset + len > flash->size) {
+ printf("ERROR: attempting %s past flash size (%#x)\n",
+ argv[0], flash->size);
+ return 1;
+ }
+
ret = spi_flash_erase(flash, offset, len);
if (ret) {
printf("SPI flash %s failed\n", argv[0]);