From: Colin Ian King <colin.k...@canonical.com>
The comparison of an out of range index into space->context_tbl is
off-by-one and should be using >= rather than > in the comparison.
Detected by CoverityScan, CID#1419694 ("Out-of-bounds read")
Fixes: 849246e7ce9ce ("tpm2: add session handle context saving and restoring to
the space code")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
drivers/char/tpm/tpm2-space.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c
index d36d81e07076..009934269514 100644
--- a/drivers/char/tpm/tpm2-space.c
+++ b/drivers/char/tpm/tpm2-space.c
@@ -229,7 +229,7 @@ static bool tpm2_map_to_phandle(struct tpm_space *space,
void *handle)
int i;
i = 0xFFFFFF - (vhandle & 0xFFFFFF);
- if (i > ARRAY_SIZE(space->context_tbl) || !space->context_tbl[i])
+ if (i >= ARRAY_SIZE(space->context_tbl) || !space->context_tbl[i])
return false;
phandle = space->context_tbl[i];
--
2.11.0
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