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Subject[PATCH 4.20 026/111] IN_BADCLASS: fix macro to actually work
4.20-stable review patch.  If anyone has any objections, please let me know.


From: Greg Kroah-Hartman <>

[ Upstream commit f275ee0fa3a06eb87edc229749cf1eb18f0663fa ]

Commit 65cab850f0ee ("net: Allow class-e address assignment via ifconfig
ioctl") modified the IN_BADCLASS macro a bit, but unfortunatly one too
many '(' characters were added to the line, making any code that used
it, not build properly.

Also, the macro now compares an unsigned with a signed value, which
isn't ok, so fix that up by making both types match properly.

Reported-by: Christopher Ferris <>
Fixes: 65cab850f0ee ("net: Allow class-e address assignment via ifconfig ioctl")
Cc: Dave Taht <>
Signed-off-by: Greg Kroah-Hartman <>
Signed-off-by: David S. Miller <>
Signed-off-by: Greg Kroah-Hartman <>
include/uapi/linux/in.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/uapi/linux/in.h
+++ b/include/uapi/linux/in.h
@@ -268,7 +268,7 @@ struct sockaddr_in {
#define IN_MULTICAST_NET 0xe0000000

-#define IN_BADCLASS(a) ((((long int) (a) ) == 0xffffffff)
+#define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff)

#define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)

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