iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

crypto: asymmetric_keys - handle EBUSY due to backlog correctly

Browse Source 
commit e68368aed56324e2e38d4f6b044bb8cf82077fc2 upstream.

public_key_verify_signature() was passing the CRYPTO_TFM_REQ_MAY_BACKLOG
flag to akcipher_request_set_callback() but was not handling correctly
the case where a -EBUSY error could be returned from the call to
crypto_akcipher_verify() if backlog was used, possibly casuing
data corruption due to use-after-free of buffers.

Resolve this by handling -EBUSY correctly.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gilad Ben-Yossef 2017-05-18 16:29:23 +03:00 committed by Greg Kroah-Hartman
parent 7c24a70c70
commit 0e479742e8
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
crypto/asymmetric_keys/public_key.c
View File

@ -140,7 +140,7 @@ int public_key_verify_signature(const struct public_key *pkey,
* signature and returns that to us.
*/
ret = crypto_akcipher_verify(req);
if (ret == -EINPROGRESS) {
if ((ret == -EINPROGRESS) || (ret == -EBUSY)) {
wait_for_completion(&compl.completion);
ret = compl.err;
}