net/sctp: Validate parameter size for SCTP_GET_ASSOC_STATS
authorGuenter Roeck <linux@roeck-us.net>
Wed, 27 Feb 2013 10:57:31 +0000 (10:57 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 27 Feb 2013 21:09:19 +0000 (16:09 -0500)
commit726bc6b092da4c093eb74d13c07184b18c1af0f1
tree4895b99cab1b958007b0b71d4dd49947f41e234a
parent45af3fb4a018ef84bf1c9f2dfbd887a41242e77f
net/sctp: Validate parameter size for SCTP_GET_ASSOC_STATS

Building sctp may fail with:

In function ‘copy_from_user’,
    inlined from ‘sctp_getsockopt_assoc_stats’ at
    net/sctp/socket.c:5656:20:
arch/x86/include/asm/uaccess_32.h:211:26: error: call to
    ‘copy_from_user_overflow’ declared with attribute error: copy_from_user()
    buffer size is not provably correct

if built with W=1 due to a missing parameter size validation
before the call to copy_from_user.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sctp/socket.c