diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/sd/sd.c | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/hw/sd/sd.c b/hw/sd/sd.c index f4f76f8fd2..fad9cf1ee7 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -1171,13 +1171,15 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req) case 17: /* CMD17: READ_SINGLE_BLOCK */ switch (sd->state) { case sd_transfer_state: - sd->state = sd_sendingdata_state; - sd->data_start = addr; - sd->data_offset = 0; - if (sd->data_start + sd->blk_len > sd->size) { + if (addr + sd->blk_len > sd->size) { sd->card_status |= ADDRESS_ERROR; + return sd_r1; } + + sd->state = sd_sendingdata_state; + sd->data_start = addr; + sd->data_offset = 0; return sd_r1; default: @@ -1188,13 +1190,15 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req) case 18: /* CMD18: READ_MULTIPLE_BLOCK */ switch (sd->state) { case sd_transfer_state: - sd->state = sd_sendingdata_state; - sd->data_start = addr; - sd->data_offset = 0; - if (sd->data_start + sd->blk_len > sd->size) { + if (addr + sd->blk_len > sd->size) { sd->card_status |= ADDRESS_ERROR; + return sd_r1; } + + sd->state = sd_sendingdata_state; + sd->data_start = addr; + sd->data_offset = 0; return sd_r1; default: @@ -1234,14 +1238,17 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req) /* Writing in SPI mode not implemented. */ if (sd->spi) break; + + if (addr + sd->blk_len > sd->size) { + sd->card_status |= ADDRESS_ERROR; + return sd_r1; + } + sd->state = sd_receivingdata_state; sd->data_start = addr; sd->data_offset = 0; sd->blk_written = 0; - if (sd->data_start + sd->blk_len > sd->size) { - sd->card_status |= ADDRESS_ERROR; - } if (sd_wp_addr(sd, sd->data_start)) { sd->card_status |= WP_VIOLATION; } @@ -1261,14 +1268,17 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req) /* Writing in SPI mode not implemented. */ if (sd->spi) break; + + if (addr + sd->blk_len > sd->size) { + sd->card_status |= ADDRESS_ERROR; + return sd_r1; + } + sd->state = sd_receivingdata_state; sd->data_start = addr; sd->data_offset = 0; sd->blk_written = 0; - if (sd->data_start + sd->blk_len > sd->size) { - sd->card_status |= ADDRESS_ERROR; - } if (sd_wp_addr(sd, sd->data_start)) { sd->card_status |= WP_VIOLATION; } |