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Ip=[149.199.60.100]; Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR02MB1329 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180220_022230_945757_0C86EC57 X-CRM114-Status: GOOD ( 24.12 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Barry Song , Vineet Gupta , Michal Simek , linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-serial@vger.kernel.org, Jiri Slaby , linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP On 20.2.2018 10:40, Geert Uytterhoeven wrote: > The cdns_uart_port[] array is indexed using a value derived from the > "serialN" alias in DT, which may lead to an out-of-bounds access. > > Fix this by adding a range check. > > Fixes: 1f118c02a1819856 ("serial: xuartps: Fix out-of-bounds access through DT alias") I didn't find this sha1 - patch name is this one. > Signed-off-by: Geert Uytterhoeven > --- > drivers/tty/serial/xilinx_uartps.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c > index b9b2bc76bcac606c..abcb4d09a2d866d0 100644 > --- a/drivers/tty/serial/xilinx_uartps.c > +++ b/drivers/tty/serial/xilinx_uartps.c > @@ -1110,7 +1110,7 @@ static struct uart_port *cdns_uart_get_port(int id) > struct uart_port *port; > > /* Try the given port id if failed use default method */ > - if (cdns_uart_port[id].mapbase != 0) { > + if (id < CDNS_UART_NR_PORTS && cdns_uart_port[id].mapbase != 0) { > /* Find the next unused port */ > for (id = 0; id < CDNS_UART_NR_PORTS; id++) > if (cdns_uart_port[id].mapbase == 0) > Below should be better fix for this driver. Thanks, Michal initialize it */ diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index b9b2bc76bcac..b77c6477ed93 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -1109,6 +1109,9 @@ static struct uart_port *cdns_uart_get_port(int id) { struct uart_port *port; + if (id >= CDNS_UART_NR_PORTS) + return NULL; + /* Try the given port id if failed use default method */ if (cdns_uart_port[id].mapbase != 0) { /* Find the next unused port */ @@ -1117,9 +1120,6 @@ static struct uart_port *cdns_uart_get_port(int id) break; } - if (id >= CDNS_UART_NR_PORTS) - return NULL; - port = &cdns_uart_port[id]; /* At this point, we've got an empty uart_port struct,