linux-kernel - [tip: x86/sev] x86/sev: Use kfree_sensitive() when freeing a SNP message descriptor

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Message-ID: <176890506111.510.12355221594029058279.tip-bot2@tip-bot2>
Date: Tue, 20 Jan 2026 10:30:38 -0000
From: "tip-bot2 for Borislav Petkov (AMD)" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: kernel test robot <lkp@...el.com>, Julia Lawall <julia.lawall@...ia.fr>,
 "Borislav Petkov (AMD)" <bp@...en8.de>,
 Tom Lendacky <thomas.lendacky@....com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: x86/sev] x86/sev: Use kfree_sensitive() when freeing a SNP
 message descriptor

The following commit has been merged into the x86/sev branch of tip:

Commit-ID:     af05e558988ed004a20fc4de7d0f80cfbba663f0
Gitweb:        https://git.kernel.org/tip/af05e558988ed004a20fc4de7d0f80cfbba663f0
Author:        Borislav Petkov (AMD) <bp@...en8.de>
AuthorDate:    Mon, 12 Jan 2026 12:37:49 +01:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Tue, 20 Jan 2026 11:23:28 +01:00

x86/sev: Use kfree_sensitive() when freeing a SNP message descriptor

Use the proper helper instead of an open-coded variant.

Closes: https://lore.kernel.org/r/202512202235.WHPQkLZu-lkp@intel.com
Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Julia Lawall <julia.lawall@...ia.fr>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@....com>
Link: https://patch.msgid.link/20260112114147.GBaWTd-8HSy_Xp4S3X@fat_crate.local
---
 arch/x86/coco/sev/core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
index a059e00..1b86f48 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -1632,8 +1632,7 @@ void snp_msg_free(struct snp_msg_desc *mdesc)
 	free_shared_pages(mdesc->request, sizeof(struct snp_guest_msg));
 	iounmap((__force void __iomem *)mdesc->secrets);
 
-	memset(mdesc, 0, sizeof(*mdesc));
-	kfree(mdesc);
+	kfree_sensitive(mdesc);
 }
 EXPORT_SYMBOL_GPL(snp_msg_free);