The carry from the 64->32bits folding was dropped, e.g with:
saddr=0xFFFFFFFF daddr=0xFF0000FF len=0xFFFF proto=0 sum=1
Signed-off-by: Karl Beldan <karl.bel...@rivierawaves.com>
Cc: Mike Frysinger <vap...@gentoo.org>
Cc: Arnd Bergmann <a...@arndb.de>
Cc: linux-kernel@vger.kernel.org
Cc: Stable <sta...@vger.kernel.org>
---
lib/checksum.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/checksum.c b/lib/checksum.c
index 129775e..4b5adf2 100644
--- a/lib/checksum.c
+++ b/lib/checksum.c
@@ -195,8 +195,8 @@ __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
#else
s += (proto + len) << 8;
#endif
- s += (s >> 32);
- return (__force __wsum)s;
+ s += (s << 32) + (s >> 32);
+ return (__force __wsum)(s >> 32);
}
EXPORT_SYMBOL(csum_tcpudp_nofold);
#endif
--
2.0.1
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