plpks_signed_update_var() dereferences the supplied PLPKS variable pointer
without validating it. A NULL argument could therefore result in a NULL
pointer dereference.
Reject a NULL pointer argument with -EINVAL.
Fixes: 899d9b8fee66 ("powerpc/pseries: Implement signed update for PLPKS
objects")
Cc: [email protected] # 6.3
Signed-off-by: Srish Srinivasan <[email protected]>
Tested-by: R Nageswara Sastry <[email protected]>
---
arch/powerpc/platforms/pseries/plpks.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/plpks.c
b/arch/powerpc/platforms/pseries/plpks.c
index ccf5765a907b..e3ae2cd78247 100644
--- a/arch/powerpc/platforms/pseries/plpks.c
+++ b/arch/powerpc/platforms/pseries/plpks.c
@@ -637,6 +637,9 @@ int plpks_signed_update_var(struct plpks_var *var, u64
flags)
u64 continuetoken = 0;
u64 timeout = 0;
+ if (!var)
+ return -EINVAL;
+
if (!var->data || var->datalen <= 0 || var->namelen >
PLPKS_MAX_NAME_SIZE)
return -EINVAL;
--
2.52.0
