This is a note to let you know that I've just added the patch titled
KEYS: trusted: tee: Refactor register SHM usage
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:
keys-trusted-tee-refactor-register-shm-usage.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.
>From c745cd1718b7825d69315fe7127e2e289e617598 Mon Sep 17 00:00:00 2001
From: Sumit Garg <sumit.garg@xxxxxxxxxx>
Date: Tue, 22 Aug 2023 16:59:33 +0530
Subject: KEYS: trusted: tee: Refactor register SHM usage
From: Sumit Garg <sumit.garg@xxxxxxxxxx>
commit c745cd1718b7825d69315fe7127e2e289e617598 upstream.
The OP-TEE driver using the old SMC based ABI permits overlapping shared
buffers, but with the new FF-A based ABI each physical page may only
be registered once.
As the key and blob buffer are allocated adjancently, there is no need
for redundant register shared memory invocation. Also, it is incompatibile
with FF-A based ABI limitation. So refactor register shared memory
implementation to use only single invocation to register both key and blob
buffers.
[jarkko: Added cc to stable.]
Cc: stable@xxxxxxxxxxxxxxx # v5.16+
Fixes: 4615e5a34b95 ("optee: add FF-A support")
Reported-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
Signed-off-by: Sumit Garg <sumit.garg@xxxxxxxxxx>
Tested-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
Reviewed-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
security/keys/trusted-keys/trusted_tee.c | 64 +++++++++----------------------
1 file changed, 20 insertions(+), 44 deletions(-)
--- a/security/keys/trusted-keys/trusted_tee.c
+++ b/security/keys/trusted-keys/trusted_tee.c
@@ -65,24 +65,16 @@ static int trusted_tee_seal(struct trust
int ret;
struct tee_ioctl_invoke_arg inv_arg;
struct tee_param param[4];
- struct tee_shm *reg_shm_in = NULL, *reg_shm_out = NULL;
+ struct tee_shm *reg_shm = NULL;
memset(&inv_arg, 0, sizeof(inv_arg));
memset(¶m, 0, sizeof(param));
- reg_shm_in = tee_shm_register_kernel_buf(pvt_data.ctx, p->key,
- p->key_len);
- if (IS_ERR(reg_shm_in)) {
- dev_err(pvt_data.dev, "key shm register failed\n");
- return PTR_ERR(reg_shm_in);
- }
-
- reg_shm_out = tee_shm_register_kernel_buf(pvt_data.ctx, p->blob,
- sizeof(p->blob));
- if (IS_ERR(reg_shm_out)) {
- dev_err(pvt_data.dev, "blob shm register failed\n");
- ret = PTR_ERR(reg_shm_out);
- goto out;
+ reg_shm = tee_shm_register_kernel_buf(pvt_data.ctx, p->key,
+ sizeof(p->key) + sizeof(p->blob));
+ if (IS_ERR(reg_shm)) {
+ dev_err(pvt_data.dev, "shm register failed\n");
+ return PTR_ERR(reg_shm);
}
inv_arg.func = TA_CMD_SEAL;
@@ -90,13 +82,13 @@ static int trusted_tee_seal(struct trust
inv_arg.num_params = 4;
param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
- param[0].u.memref.shm = reg_shm_in;
+ param[0].u.memref.shm = reg_shm;
param[0].u.memref.size = p->key_len;
param[0].u.memref.shm_offs = 0;
param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT;
- param[1].u.memref.shm = reg_shm_out;
+ param[1].u.memref.shm = reg_shm;
param[1].u.memref.size = sizeof(p->blob);
- param[1].u.memref.shm_offs = 0;
+ param[1].u.memref.shm_offs = sizeof(p->key);
ret = tee_client_invoke_func(pvt_data.ctx, &inv_arg, param);
if ((ret < 0) || (inv_arg.ret != 0)) {
@@ -107,11 +99,7 @@ static int trusted_tee_seal(struct trust
p->blob_len = param[1].u.memref.size;
}
-out:
- if (reg_shm_out)
- tee_shm_free(reg_shm_out);
- if (reg_shm_in)
- tee_shm_free(reg_shm_in);
+ tee_shm_free(reg_shm);
return ret;
}
@@ -124,24 +112,16 @@ static int trusted_tee_unseal(struct tru
int ret;
struct tee_ioctl_invoke_arg inv_arg;
struct tee_param param[4];
- struct tee_shm *reg_shm_in = NULL, *reg_shm_out = NULL;
+ struct tee_shm *reg_shm = NULL;
memset(&inv_arg, 0, sizeof(inv_arg));
memset(¶m, 0, sizeof(param));
- reg_shm_in = tee_shm_register_kernel_buf(pvt_data.ctx, p->blob,
- p->blob_len);
- if (IS_ERR(reg_shm_in)) {
- dev_err(pvt_data.dev, "blob shm register failed\n");
- return PTR_ERR(reg_shm_in);
- }
-
- reg_shm_out = tee_shm_register_kernel_buf(pvt_data.ctx, p->key,
- sizeof(p->key));
- if (IS_ERR(reg_shm_out)) {
- dev_err(pvt_data.dev, "key shm register failed\n");
- ret = PTR_ERR(reg_shm_out);
- goto out;
+ reg_shm = tee_shm_register_kernel_buf(pvt_data.ctx, p->key,
+ sizeof(p->key) + sizeof(p->blob));
+ if (IS_ERR(reg_shm)) {
+ dev_err(pvt_data.dev, "shm register failed\n");
+ return PTR_ERR(reg_shm);
}
inv_arg.func = TA_CMD_UNSEAL;
@@ -149,11 +129,11 @@ static int trusted_tee_unseal(struct tru
inv_arg.num_params = 4;
param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
- param[0].u.memref.shm = reg_shm_in;
+ param[0].u.memref.shm = reg_shm;
param[0].u.memref.size = p->blob_len;
- param[0].u.memref.shm_offs = 0;
+ param[0].u.memref.shm_offs = sizeof(p->key);
param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT;
- param[1].u.memref.shm = reg_shm_out;
+ param[1].u.memref.shm = reg_shm;
param[1].u.memref.size = sizeof(p->key);
param[1].u.memref.shm_offs = 0;
@@ -166,11 +146,7 @@ static int trusted_tee_unseal(struct tru
p->key_len = param[1].u.memref.size;
}
-out:
- if (reg_shm_out)
- tee_shm_free(reg_shm_out);
- if (reg_shm_in)
- tee_shm_free(reg_shm_in);
+ tee_shm_free(reg_shm);
return ret;
}
Patches currently in stable-queue which might be from sumit.garg@xxxxxxxxxx are
queue-6.6/keys-trusted-tee-refactor-register-shm-usage.patch
