This is a note to let you know that I've just added the patch titled
crypto: rsa - add a check for allocation failure
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-rsa-add-a-check-for-allocation-failure.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a8f41f23f529fbbd658fb7d5e9c5fa375d0164b6
Author: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Mon Oct 30 12:02:59 2023 +0300
crypto: rsa - add a check for allocation failure
[ Upstream commit d872ca165cb67112f2841ef9c37d51ef7e63d1e4 ]
Static checkers insist that the mpi_alloc() allocation can fail so add
a check to prevent a NULL dereference. Small allocations like this
can't actually fail in current kernels, but adding a check is very
simple and makes the static checkers happy.
Fixes: 6637e11e4ad2 ("crypto: rsa - allow only odd e and restrict value in FIPS mode")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/crypto/rsa.c b/crypto/rsa.c
index c79613cdce6e..b9cd11fb7d36 100644
--- a/crypto/rsa.c
+++ b/crypto/rsa.c
@@ -220,6 +220,8 @@ static int rsa_check_exponent_fips(MPI e)
}
e_max = mpi_alloc(0);
+ if (!e_max)
+ return -ENOMEM;
mpi_set_bit(e_max, 256);
if (mpi_cmp(e, e_max) >= 0) {
