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usb: usb_dc_stm32: Fix reading invalid EP

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Fix crash when reading invalid endpoint found in harness test.

Fixes #13560

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
This commit is contained in:
Andrei Emeltchenko 2019-03-25 16:01:37 +02:00 • committed by Anas Nashif
commit 8ed215e011
1 changed files with 8 additions and 1 deletions
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9
drivers/usb/device/usb_dc_stm32.c
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@ -782,7 +782,14 @@ int usb_dc_ep_read_wait(u8_t ep, u8_t *data, u32_t max_data_len,
u32_t *read_bytes) u32_t *read_bytes)
{ {
struct usb_dc_stm32_ep_state *ep_state = usb_dc_stm32_get_ep_state(ep); struct usb_dc_stm32_ep_state *ep_state = usb_dc_stm32_get_ep_state(ep);
u32_t read_count = ep_state->read_count; u32_t read_count;
if (!ep_state) {
LOG_ERR("Invalid Endpoint %x", ep);
return -EINVAL;
}
read_count = ep_state->read_count;
LOG_DBG("ep 0x%02x, %u bytes, %u+%u, %p", ep, max_data_len, LOG_DBG("ep 0x%02x, %u bytes, %u+%u, %p", ep, max_data_len,
ep_state->read_offset, read_count, data); ep_state->read_offset, read_count, data);