[U-Boot] [PATCH 1/2 V2] mmc: add boundary check for mmc operation
Lei Wen
leiwen at marvell.com
Mon Sep 13 13:54:49 CEST 2010
Change log:
change the puts to printf to better formating.
Signed-off-by: Lei Wen <leiwen at marvell.com>
---
drivers/mmc/mmc.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index cf4ea16..42638f6 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -92,6 +92,11 @@ mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
blklen = mmc->write_bl_len;
+ if ((start + blkcnt) > mmc->block_dev.lba) {
+ printf("MMC: block number 0x%x exceeds max(0x%x)",
+ start + blkcnt, mmc->block_dev.lba);
+ return 0;
+ }
err = mmc_set_blocklen(mmc, mmc->write_bl_len);
if (err) {
@@ -219,6 +224,11 @@ static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
if (!mmc)
return 0;
+ if ((start + blkcnt) > mmc->block_dev.lba) {
+ printf("MMC: block number 0x%x exceeds max(0x%x)",
+ start + blkcnt, mmc->block_dev.lba);
+ return 0;
+ }
/* We always do full block reads from the card */
err = mmc_set_blocklen(mmc, mmc->read_bl_len);
--
1.7.0.4
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