Commit 152d0bcd authored by Herbert Xu's avatar Herbert Xu
Browse files

dm crypt: Fix reqsize in crypt_iv_eboiv_gen 



A skcipher_request object is made up of struct skcipher_request
followed by a variable-sized trailer.  The allocation of the
skcipher_request and IV in crypt_iv_eboiv_gen is missing the
memory for struct skcipher_request.  Fix it by adding it to
reqsize.

Fixes: e3023094 ("dm crypt: Avoid using MAX_CIPHER_BLOCKSIZE")
Cc: <stable@vger.kernel.org> #6.5+
Reported-by: default avatarTatu Heikkilä <tatu.heikkila@gmail.com>
Reviewed-by: default avatarMike Snitzer <snitzer@kernel.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 21155620

drivers/md/dm-crypt.c

+2 −1
Original line number Diff line number Diff line
@@ -753,7 +753,8 @@ static int crypt_iv_eboiv_gen(struct crypt_config *cc, u8 *iv, 
	int err;

	u8 *buf;



	reqsize = ALIGN(crypto_skcipher_reqsize(tfm), __alignof__(__le64));

	reqsize = sizeof(*req) + crypto_skcipher_reqsize(tfm);

	reqsize = ALIGN(reqsize, __alignof__(__le64));



	req = kmalloc(reqsize + cc->iv_size, GFP_NOIO);

	if (!req)