evie/android_kernel_oneplus_msm8998
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msm: asm: validate ADSP data before access

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Validate buffer index obtained from ADSP token before using it.

CRs-Fixed: 2372302
Change-Id: I5c3b1634bd08b516844638dd67f726a882edfc17
Signed-off-by: Vignesh Kulothungan <vigneshk@codeaurora.org>
This commit is contained in:
Vignesh Kulothungan 2019-02-28 14:55:05 -08:00 • committed by Gerrit - the friendly Code Review server
parent c2c52e8d2b
commit 877ffd6d9d
1 changed files with 22 additions and 0 deletions
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22
sound/soc/msm/qdsp6v2/q6asm.c
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@ -1962,6 +1962,7 @@ static int32_t q6asm_callback(struct apr_client_data *data, void *priv)
data->dest_port);
if ((data->opcode != ASM_DATA_EVENT_RENDERED_EOS) &&
(data->opcode != ASM_DATA_EVENT_EOS) &&
(data->opcode != ASM_SESSION_EVENTX_OVERFLOW) &&
(data->opcode != ASM_SESSION_EVENT_RX_UNDERFLOW)) {
if (payload == NULL) {
pr_err("%s: payload is null\n", __func__);
@ -2177,6 +2178,17 @@ static int32_t q6asm_callback(struct apr_client_data *data, void *priv)
}
spin_lock_irqsave(&port->dsp_lock, dsp_flags);
buf_index = asm_token._token.buf_index;
if (buf_index < 0 ||
buf_index >= port->max_buf_cnt) {
pr_debug("%s: Invalid buffer index %u\n",
__func__, buf_index);
spin_unlock_irqrestore(&port->dsp_lock,
dsp_flags);
spin_unlock_irqrestore(
&(session[session_id].session_lock),
flags);
return -EINVAL;
}
if (data->payload_size >= 2 * sizeof(uint32_t) &&
(lower_32_bits(port->buf[buf_index].phys) !=
payload[0] ||
@ -2287,6 +2299,16 @@ static int32_t q6asm_callback(struct apr_client_data *data, void *priv)
}
spin_lock_irqsave(&port->dsp_lock, dsp_flags);
buf_index = asm_token._token.buf_index;
if (buf_index < 0 || buf_index >= port->max_buf_cnt) {
pr_debug("%s: Invalid buffer index %u\n",
__func__, buf_index);
spin_unlock_irqrestore(&port->dsp_lock,
dsp_flags);
spin_unlock_irqrestore(
&(session[session_id].session_lock),
flags);
return -EINVAL;
}
port->buf[buf_index].used = 0;
if (lower_32_bits(port->buf[buf_index].phys) !=
payload[READDONE_IDX_BUFADD_LSW] ||