On Mon, Mar 20, 2017 at 02:23:36PM +0000, Colin King wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> 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.king@xxxxxxxxxxxxx>
> ---
> 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
Thanks. If you don't mind, I would squash this to that patch?
/Jarkko
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