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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2020-02-27 19:19:54 +0300 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2020-03-10 10:12:04 +0300 |
| commit | 36fa3e50085e3858dd506e4431b9abd1bcb1f542 (patch) | |
| tree | 8522be7349384c78ca9d49dd10745c6c80265eec /drivers/tee | |
| parent | 11a48a5a18c63fd7621bb050228cebf13566e4d8 (diff) | |
| download | linux-36fa3e50085e3858dd506e4431b9abd1bcb1f542.tar.xz | |
tee: amdtee: out of bounds read in find_session()
The "index" is a user provided value from 0-USHRT_MAX. If it's over
TEE_NUM_SESSIONS (31) then it results in an out of bounds read when we
call test_bit(index, sess->sess_mask).
Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver")
Acked-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee')
| -rw-r--r-- | drivers/tee/amdtee/core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tee/amdtee/core.c b/drivers/tee/amdtee/core.c index 6370bb55f512..dbc238c7c263 100644 --- a/drivers/tee/amdtee/core.c +++ b/drivers/tee/amdtee/core.c @@ -139,6 +139,9 @@ static struct amdtee_session *find_session(struct amdtee_context_data *ctxdata, u32 index = get_session_index(session); struct amdtee_session *sess; + if (index >= TEE_NUM_SESSIONS) + return NULL; + list_for_each_entry(sess, &ctxdata->sess_list, list_node) if (ta_handle == sess->ta_handle && test_bit(index, sess->sess_mask)) |