svn commit: r188525 - in stable/7/sys: . netinet

[Randall Stewart]

Author: rrs
Date: Thu Feb 12 18:02:46 2009
New Revision: 188525
URL: http://svn.freebsd.org/changeset/base/188525

Log:
  MFC of 184027:
  
  Reported by Yehuda Weinraub (yehudasa at gamil.com) - CRC32C algorithm
  uses incorrect init_bytes value. It SHOULD have the number
  of bytes to get to a 4 byte boundary.
  
  PR:		128134

Modified:
  stable/7/sys/   (props changed)
  stable/7/sys/netinet/sctp_crc32.c

Modified: stable/7/sys/netinet/sctp_crc32.c
==============================================================================
--- stable/7/sys/netinet/sctp_crc32.c	Thu Feb 12 17:57:28 2009	(r188524)
+++ stable/7/sys/netinet/sctp_crc32.c	Thu Feb 12 18:02:46 2009	(r188525)
@@ -583,13 +583,13 @@ update_crc32(uint32_t crc32c,
     unsigned char *buffer,
     unsigned int length)
 {
-	uint32_t offset;
+	uint32_t to_even_word;
 
 	if (length == 0) {
 		return (crc32c);
 	}
-	offset = ((uintptr_t) buffer) & 0x3;
-	return (sctp_crc32c_sb8_64_bit(crc32c, buffer, length, offset));
+	to_even_word = (4 - (((uintptr_t) buffer) & 0x3));
+	return (sctp_crc32c_sb8_64_bit(crc32c, buffer, length, to_even_word));
 }
 
 uint32_t sctp_crc_c[256] = {