tpm-buf: Implement managed allocations
Decouple kzalloc from buffer creation, so that a managed allocation can be
used:
struct tpm_buf *buf __free(kfree) buf = kzalloc(TPM_BUFSIZE,
GFP_KERNEL);
if (!buf)
return -ENOMEM;
tpm_buf_init(buf, TPM_BUFSIZE);
Alternatively, stack allocations are also possible:
u8 buf_data[512];
struct tpm_buf *buf = (struct tpm_buf *)buf_data;
tpm_buf_init(buf, sizeof(buf_data));
This is achieved by embedding buffer's header inside the allocated blob,
instead of having an outer wrapper.
Cc: Ross Philipson <ross.philipson@oracle.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@opinsys.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
---
v9:
- The patch had an unintended spurious change in tpm2_pcr_read() when
size check for the response did not match, returning 'rc'. Address
https://lore.kernel.org/r/202512141417.YUHjFhWa-lkp@intel.com/ by
returning -EIO, which is the most correct guess given likely cause
would be and I/O error.
12 files changed
