From 9c908f97d0f9aee32fa6d4b0a44c4c5d0ccab2b0 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 27 Sep 2007 13:09:28 -0700 Subject: [PATCH] [SPARC]: Fix EBUS use of uninitialized variable. If of_get_property() fails, it returns NULL and the 'len' parameter is undefined. So we need to explicitly set len to zero in such cases. Noticed by Al Viro. Signed-off-by: David S. Miller --- arch/sparc/kernel/ebus.c | 2 ++ arch/sparc64/kernel/ebus.c | 5 ++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/sparc/kernel/ebus.c b/arch/sparc/kernel/ebus.c index e2d02fd13f3..d850785b208 100644 --- a/arch/sparc/kernel/ebus.c +++ b/arch/sparc/kernel/ebus.c @@ -156,6 +156,8 @@ void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *d dev->prom_node = dp; regs = of_get_property(dp, "reg", &len); + if (!regs) + len = 0; if (len % sizeof(struct linux_prom_registers)) { prom_printf("UGH: proplen for %s was %d, need multiple of %d\n", dev->prom_node->name, len, diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c index bc9ae36f7a4..04ab81cb4f4 100644 --- a/arch/sparc64/kernel/ebus.c +++ b/arch/sparc64/kernel/ebus.c @@ -375,7 +375,10 @@ static void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_de dev->num_addrs = 0; dev->num_irqs = 0; } else { - (void) of_get_property(dp, "reg", &len); + const int *regs = of_get_property(dp, "reg", &len); + + if (!regs) + len = 0; dev->num_addrs = len / sizeof(struct linux_prom_registers); for (i = 0; i < dev->num_addrs; i++) -- 2.20.1