systemd/SOURCES/0730-cryptsetup-check-the-existence-of-salt-by-salt_size-.patch

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From d22cd36758db25eb9144fbe47f741cd1547b7d0e Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Fri, 17 Feb 2023 08:24:54 +0900
Subject: [PATCH] cryptsetup: check the existence of salt by salt_size > 0
Follow-up for 504d0acf61c8472bc93c2a927e858074873b2eaf.
The function may be called with non-NULL salt and salt_size == 0.
(cherry picked from commit 8c2264abb9c16bc2933f95be299f15ee66c21181)
Related: RHEL-40119
---
src/cryptsetup/cryptsetup-tokens/luks2-tpm2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/cryptsetup/cryptsetup-tokens/luks2-tpm2.c b/src/cryptsetup/cryptsetup-tokens/luks2-tpm2.c
index e353e947aa..5230a84025 100644
--- a/src/cryptsetup/cryptsetup-tokens/luks2-tpm2.c
+++ b/src/cryptsetup/cryptsetup-tokens/luks2-tpm2.c
@@ -58,7 +58,7 @@ int acquire_luks2_key(
return -ENOANO;
/* If we're using a PIN, and the luks header has a salt, it better have a pin too */
- if ((flags & TPM2_FLAGS_USE_PIN) && salt && !pin)
+ if ((flags & TPM2_FLAGS_USE_PIN) && salt_size > 0 && !pin)
return -ENOANO;
if (pin && salt_size > 0) {