From 76584e33988fc9f6c80199e04ca6e249baf7289a Mon Sep 17 00:00:00 2001 From: Alexander Kochetkov Date: Tue, 20 Feb 2018 14:35:55 +0300 Subject: [PATCH] mmc: fix off-by-one bug in mmc_startup_v4() MMC card with EXT_CSD_REV value 9 will trigger off-by-one bug while accessing mmc_versions array. The patch fix that. Signed-off-by: Alexander Kochetkov --- drivers/mmc/mmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 31f65f6e24..c930893300 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1969,7 +1969,7 @@ static int mmc_startup_v4(struct mmc *mmc) return -ENOMEM; memcpy(mmc->ext_csd, ext_csd, MMC_MAX_BLOCK_LEN); - if (ext_csd[EXT_CSD_REV] > ARRAY_SIZE(mmc_versions)) + if (ext_csd[EXT_CSD_REV] >= ARRAY_SIZE(mmc_versions)) return -EINVAL; mmc->version = mmc_versions[ext_csd[EXT_CSD_REV]]; -- 2.25.1