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dm crypt: Fix reqsize in crypt_iv_eboiv_gen

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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: e3023094dffb ("dm crypt: Avoid using MAX_CIPHER_BLOCKSIZE")
Cc: <stable@vger.kernel.org> #6.5+
Reported-by: Tatu Heikkilä <tatu.heikkila@gmail.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2023-10-06 09:41:55 +08:00
parent 21155620fb
commit 152d0bcdf1
1 changed files with 2 additions and 1 deletions
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3
drivers/md/dm-crypt.c
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@ -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)