netdev - Linux 2.6.34-rc3 + CAN build problem

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Date:	Sat, 10 Apr 2010 10:13:52 +0200
From:	Németh Márton <nm127@...email.hu>
To:	Oliver Hartkopp <socketcan@...tkopp.net>,
	Oliver Hartkopp <oliver.hartkopp@...kswagen.de>,
	Urs Thuermann <urs.thuermann@...kswagen.de>
CC:	socketcan-core@...ts.berlios.de,
	Network Development <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Linux 2.6.34-rc3 + CAN build problem

Hi,

I have some problem building Liunux kernel 2.6.34-rc3 with the attached .config:

$ make clean bzImage modules
[...]
  CC      net/socket.o
  LD      net/802/built-in.o
  LD      net/can/built-in.o
  CC [M]  net/can/bcm.o
  CC [M]  net/can/raw.o
In file included from /mnt/store/nmarci/src/linux-2.6.34-rc3/arch/x86/include/asm/uaccess.h:571,
                 from include/net/checksum.h:25,
                 from include/linux/skbuff.h:28,
                 from include/linux/if_ether.h:124,
                 from include/linux/netdevice.h:29,
                 from net/can/raw.c:48:
In function ‘copy_from_user’,
    inlined from ‘raw_setsockopt’ at net/can/raw.c:447:
/mnt/store/nmarci/src/linux-2.6.34-rc3/arch/x86/include/asm/uaccess_32.h:212: error: call to ‘copy_from_user_overflow’ declared with attribute error:
copy_from_user() buffer size is not provably correct
make[2]: *** [net/can/raw.o] Error 1
make[1]: *** [net/can] Error 2
make: *** [net] Error 2


When I disable CAN driver like this, the compile works:

--- .config.orig  2010-04-10 09:18:40.000000000 +0200
+++ .config     2010-04-10 09:19:05.000000000 +0200
@@ -705,23 +705,7 @@
 # CONFIG_NET_PKTGEN is not set
 # CONFIG_NET_TCPPROBE is not set
 # CONFIG_HAMRADIO is not set
-CONFIG_CAN=m
-CONFIG_CAN_RAW=m
-CONFIG_CAN_BCM=m
-
-#
-# CAN Device Drivers
-#
-CONFIG_CAN_VCAN=m
-CONFIG_CAN_DEV=m
-# CONFIG_CAN_CALC_BITTIMING is not set
-# CONFIG_CAN_SJA1000 is not set
-
-#
-# CAN USB interfaces
-#
-# CONFIG_CAN_EMS_USB is not set
-# CONFIG_CAN_DEBUG_DEVICES is not set
+# CONFIG_CAN is not set
 # CONFIG_IRDA is not set
 # CONFIG_BT is not set
 # CONFIG_AF_RXRPC is not set

Regards,

	Márton Németh

View attachment ".config" of type "text/plain" (68734 bytes)