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authorDavid S. Miller <davem@sunset.davemloft.net>2007-09-27 13:09:28 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-09-27 13:09:28 -0700
commit9c908f97d0f9aee32fa6d4b0a44c4c5d0ccab2b0 (patch)
tree4c863da394fd58a51cdbc4c0386560fe994ee262
parentff0ce6845bc18292e80ea40d11c3d3a539a3fc5e (diff)
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[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 <davem@davemloft.net>
-rw-r--r--arch/sparc/kernel/ebus.c2
-rw-r--r--arch/sparc64/kernel/ebus.c5
2 files changed, 6 insertions, 1 deletions
diff --git a/arch/sparc/kernel/ebus.c b/arch/sparc/kernel/ebus.c
index e2d02fd13f35..d850785b2080 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 bc9ae36f7a43..04ab81cb4f48 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++)