| Message ID | 20231017202505.340906-6-rick.p.edgecombe@intel.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | None | expand |
diff --git a/drivers/ptp/ptp_kvm_x86.c b/drivers/ptp/ptp_kvm_x86.c index 902844cc1a17..203af060013d 100644 --- a/drivers/ptp/ptp_kvm_x86.c +++ b/drivers/ptp/ptp_kvm_x86.c @@ -36,7 +36,7 @@ int kvm_arch_ptp_init(void) clock_pair = page_address(p); ret = set_memory_decrypted((unsigned long)clock_pair, 1); if (ret) { - __free_page(p); + free_decrypted_pages((unsigned long)clock_pair, 0); clock_pair = NULL; goto nofree; }
On TDX it is possible for the untrusted host to cause set_memory_encrypted() or set_memory_decrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) memory to the page allocator, which could lead to functional or security issues. Ptp could free decrypted/shared pages if set_memory_decrypted() fails. Use the recently added free_decrypted_pages() to avoid this. Cc: Richard Cochran <richardcochran@gmail.com> Cc: netdev@vger.kernel.org Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com> --- drivers/ptp/ptp_kvm_x86.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)