Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-12-28 08:45:51 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

crypto: dh - Check mpi_rshift errors

Browse Source 
Now that mpi_rshift can return errors, check them.

Fixes: 35d2bf2068 ("crypto: dh - calculate Q from P for the full public key verification")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2024-08-10 14:20:59 +08:00
parent 8e3a67f2de
commit 560efa7fca
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
crypto/dh.c
View File

@ -145,9 +145,9 @@ static int dh_is_pubkey_valid(struct dh_ctx *ctx, MPI y)
* ->p is odd, so no need to explicitly subtract one
* from it before shifting to the right.
*/
mpi_rshift(q, ctx->p, 1);
ret = mpi_rshift(q, ctx->p, 1) ?:
mpi_powm(val, y, q, ctx->p);
ret = mpi_powm(val, y, q, ctx->p);
mpi_free(q);
if (ret) {
mpi_free(val);