[PATCH v2 06/10] pseries/plpks: fix self-reference in plpks_var initializer

[Srish Srinivasan <ssrish@linux.ibm.com>]

In plpks_gen_wrapping_key() and plpks_wrap_object(), strlen(var.name) is
used to initialize var.namelen within the same struct initializer. This
references a member of var before initialization of var is complete.

Use the compile-time length of PLPKS_DEFAULT_WRAPKEY_LABEL instead.

Reported-by: R Nageswara Sastry <rnsastry@linux.ibm.com>
Fixes: 133aa79e211d ("pseries/plpks: add HCALLs for PowerVM Key Wrapping Module")
Cc: stable@vger.kernel.org
Signed-off-by: Srish Srinivasan <ssrish@linux.ibm.com>
---
 arch/powerpc/platforms/pseries/plpks.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/plpks.c b/arch/powerpc/platforms/pseries/plpks.c
index b553f7b130b6..d582c786ccad 100644
--- a/arch/powerpc/platforms/pseries/plpks.c
+++ b/arch/powerpc/platforms/pseries/plpks.c
@@ -939,7 +939,7 @@ int plpks_gen_wrapping_key(void)
 	int rc = 0, pseries_status = 0;
 	struct plpks_var var = {
 		.name = PLPKS_DEFAULT_WRAPKEY_LABEL,
-		.namelen = strlen(var.name),
+		.namelen = sizeof(PLPKS_DEFAULT_WRAPKEY_LABEL) - 1,
 		.policy = PLPKS_WRAPPINGKEY,
 		.os = PLPKS_VAR_LINUX,
 		.component = PLPKS_WRAPKEY_COMPONENT
@@ -1034,7 +1034,7 @@ int plpks_wrap_object(u8 **input_buf, u64 input_len, u16 wrap_flags,
 	bool sb_enforce_bit = wrap_flags & BIT(1);
 	struct plpks_var var = {
 		.name = PLPKS_DEFAULT_WRAPKEY_LABEL,
-		.namelen = strlen(var.name),
+		.namelen = sizeof(PLPKS_DEFAULT_WRAPKEY_LABEL) - 1,
 		.os = PLPKS_VAR_LINUX,
 		.component = PLPKS_WRAPKEY_COMPONENT
 	};
-- 
2.52.0