MIPS: Fix special case in 64 bit IP checksumming.
| Newsgroups | gmane.linux.ports.mips.cvs |
|---|---|
| Message-ID | <S23993928AbdBFOMThfLNj/[email protected]> |
Author: Ralf Baechle <[email protected]> Thu Jan 26 02:16:47 2017 +0100 Commit: 499f2e9780cfc706209c3d9554337e9ec9472e12 Gitweb: https://git.linux-mips.org/g/ralf/linux/499f2e9780cf Branch: linux-4.4-stable For certain arguments such as saddr = 0xc0a8fd60, daddr = 0xc0a8fda1, len = 80, proto = 17, sum = 0x7eae049d there will be a carry when folding the intermediate 64 bit checksum to 32 bit but the code doesn't add the carry back to the one'c complement sum, thus an incorrect result will be generated. Signed-off-by: Ralf Baechle <[email protected]> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Mark Zhang <[email protected]> (cherry picked from commit 2d62bbfca63106efe9be36413158cf2169f9e766) --- arch/mips/include/asm/checksum.h | 2 ++ 1 file changed, 2 insertions(+)