The response from the firmware is accessed multiple times. This is a potential TOCTOU error.
Reported-by: Christopher Ertl <christopher.e...@microsoft.com> Signed-off-by: Stephen Hemminger <step...@networkplumber.org> --- drivers/net/bnxt/bnxt_hwrm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c index a9c9c7297cab..20e2f6a36713 100644 --- a/drivers/net/bnxt/bnxt_hwrm.c +++ b/drivers/net/bnxt/bnxt_hwrm.c @@ -3746,6 +3746,7 @@ int bnxt_hwrm_port_led_qcaps(struct bnxt *bp) { struct hwrm_port_led_qcaps_output *resp = bp->hwrm_cmd_resp_addr; struct hwrm_port_led_qcaps_input req = {0}; + uint8_t num_leds; int rc; if (BNXT_VF(bp)) @@ -3757,10 +3758,11 @@ int bnxt_hwrm_port_led_qcaps(struct bnxt *bp) HWRM_CHECK_RESULT(); - if (resp->num_leds > 0 && resp->num_leds < BNXT_MAX_LED) { + num_leds = resp->num_leds; + if (num_leds > 0 && num_leds < BNXT_MAX_LED) { unsigned int i; - bp->num_leds = resp->num_leds; + bp->num_leds = num_leds; memcpy(bp->leds, &resp->led0_id, sizeof(bp->leds[0]) * bp->num_leds); for (i = 0; i < bp->num_leds; i++) { -- 2.20.1