Messages in this thread Patch in this message | | | From | Sherry Sun <> | Subject | [PATCH 1/2] tty: serial: fsl_lpuart: fix the potential bug of division or modulo by zero | Date | Mon, 26 Apr 2021 15:49:34 +0800 |
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This issue is reported by Coverity Check. In lpuart32_console_get_options, division or modulo by zero may results in undefined behavior.
Signed-off-by: Sherry Sun <sherry.sun@nxp.com> --- drivers/tty/serial/fsl_lpuart.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 794035041744..777d54b593f8 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -2414,6 +2414,9 @@ lpuart32_console_get_options(struct lpuart_port *sport, int *baud, bd = lpuart32_read(&sport->port, UARTBAUD); bd &= UARTBAUD_SBR_MASK; + if (!bd) + return; + sbr = bd; uartclk = lpuart_get_baud_clk_rate(sport); /* -- 2.17.1
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