From: Salah Triki Date: Mon, 25 Aug 2025 09:34:35 +0000 (+0100) Subject: bus: fsl-mc: Check return value of platform_get_resource() X-Git-Tag: v6.12.53~6 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=84ec0482ed9c9ed0aee553a5e7e7458ad79c021f;p=thirdparty%2Fkernel%2Fstable.git bus: fsl-mc: Check return value of platform_get_resource() commit 25f526507b8ccc6ac3a43bc094d09b1f9b0b90ae upstream. platform_get_resource() returns NULL in case of failure, so check its return value and propagate the error in order to prevent NULL pointer dereference. Fixes: 6305166c8771 ("bus: fsl-mc: Add ACPI support for fsl-mc") Cc: stable@vger.kernel.org Signed-off-by: Salah Triki Acked-by: Ioana Ciornei Link: https://lore.kernel.org/r/aKwuK6TRr5XNYQ8u@pc Signed-off-by: Christophe Leroy Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c index 4575d9a4e5ed6..dbc8d8f14ce7d 100644 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -1103,6 +1103,9 @@ static int fsl_mc_bus_probe(struct platform_device *pdev) * Get physical address of MC portal for the root DPRC: */ plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!plat_res) + return -EINVAL; + mc_portal_phys_addr = plat_res->start; mc_portal_size = resource_size(plat_res); mc_portal_base_phys_addr = mc_portal_phys_addr & ~0x3ffffff;