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| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-05-19 06:24:12 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-06-02 13:21:32 +0300 |
| commit | dd536cb9f73cb31eb6e997ab8a81bb1eb5b0c465 (patch) | |
| tree | 26b9212f276e2937ecabdf2a6d954a22bb9a009b | |
| parent | 66dd59b7aa55d0ea6c0eebfbfe4353eadaac5e1b (diff) | |
| download | linux-dd536cb9f73cb31eb6e997ab8a81bb1eb5b0c465.tar.xz | |
crypto: ccp - Validate that platform access mailbox registers are declared
Some platforms might support platform access doorbell but not mailbox.
Add an extra guard to ensure this doesn't cause accesses to wrong ranges
if a consumer calls psp_send_platform_access_msg().
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/ccp/platform-access.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/platform-access.c b/drivers/crypto/ccp/platform-access.c index 939c924fc383..94367bc49e35 100644 --- a/drivers/crypto/ccp/platform-access.c +++ b/drivers/crypto/ccp/platform-access.c @@ -67,6 +67,11 @@ int psp_send_platform_access_msg(enum psp_platform_access_msg msg, return -ENODEV; pa_dev = psp->platform_access_data; + + if (!pa_dev->vdata->cmdresp_reg || !pa_dev->vdata->cmdbuff_addr_lo_reg || + !pa_dev->vdata->cmdbuff_addr_hi_reg) + return -ENODEV; + cmd = psp->io_regs + pa_dev->vdata->cmdresp_reg; lo = psp->io_regs + pa_dev->vdata->cmdbuff_addr_lo_reg; hi = psp->io_regs + pa_dev->vdata->cmdbuff_addr_hi_reg; |