[Skiboot] [PATCH 1/2] core/pldm: Fix dangling point issue

[Abhishek Singh Tomar]

When calling pldm_platform_init() and the GET_PDR PLDM
request fails, the 'pdrs_repo' global variable is freed
but becomes a dangling pointer. Subsequent calls to
pldm_platform_init will lead to an invalid read.

==28652== Invalid read of size 8
==28652==    at 0x40A4C8: pldm_pdr_destroy (pdr.c:130)
==28652==    by 0x424BA3: pdr_init_complete (pldm-platform-requests.c:42)
==28652==    by 0x4274DA: pldm_platform_load_pdrs (pldm-platform-requests.c:1170)
==28652==    by 0x42759C: pdrs_init (pldm-platform-requests.c:1190)
==28652==    by 0x427703: pldm_platform_init (pldm-platform-requests.c:1221)

Signed-off-by: Abhishek Singh Tomar <abhishek at linux.ibm.com>
---
 core/pldm/pldm-platform-requests.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/pldm/pldm-platform-requests.c b/core/pldm/pldm-platform-requests.c
index cb0ff9443..21ec43a47 100644
--- a/core/pldm/pldm-platform-requests.c
+++ b/core/pldm/pldm-platform-requests.c
@@ -38,8 +38,10 @@ static void pdr_init_complete(bool success)
 	if (!success) {
 		pdr_ready = false;
 
-		if (pdrs_repo)
+		if (pdrs_repo) {
 			pldm_pdr_destroy(pdrs_repo);
+			pdrs_repo = NULL;
+		}
 		return;
 	}
 
-- 
2.45.2