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mmc: fix off-by-one bug in mmc_startup_v4()

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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 <al.kochet@gmail.com>
This commit is contained in:
Alexander Kochetkov 2018-02-20 14:35:55 +03:00 • committed by Jaehoon Chung
parent 8a856db238
commit 76584e3398
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/mmc.c
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@ -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]];