Commit f4f68993 authored Mar 27, 2009 by Yehuda Sadeh Committed by Herbert Xu Mar 27, 2009

crypto: shash - Fix unaligned calculation with short length

When the total length is shorter than the calculated number of unaligned bytes, the call to shash->update breaks. For example, calling crc32c on unaligned buffer with length of 1 can result in a system crash.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 3341323b

crypto/shash.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -77,6 +77,9 @@ static int shash_update_unaligned(struct shash_desc desc, const u8 data,
		u8 buf[shash_align_buffer_size(unaligned_len, alignmask)]
		__attribute__ ((aligned));

		if (unaligned_len > len)
		unaligned_len = len;

		memcpy(buf, data, unaligned_len);

		return shash->update(desc, buf, unaligned_len) ?: