linux-kernel - [PATCH] arm64: mm: Don't use %pK through printk

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Message-Id: <20250217-restricted-pointers-arm64-v1-1-14bb1f516b01@linutronix.de>
Date: Mon, 17 Feb 2025 08:39:06 +0100
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH] arm64: mm: Don't use %pK through printk

Restricted pointers ("%pK") are not meant to be used through printk().
It can unintentionally expose security sensitive, raw pointer values.

Use regular pointer formatting instead.

Link: https://lore.kernel.org/lkml/20250113171731-dc10e3c1-da64-4af0-b767-7c7070468023@linutronix.de/
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 arch/arm64/mm/physaddr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/physaddr.c b/arch/arm64/mm/physaddr.c
index cde44c13dda1bc0924d2d50369ad87f544a0a802..7d94e09b01b35094e883875a46b979666549095c 100644
--- a/arch/arm64/mm/physaddr.c
+++ b/arch/arm64/mm/physaddr.c
@@ -10,7 +10,7 @@
 phys_addr_t __virt_to_phys(unsigned long x)
 {
 	WARN(!__is_lm_address(__tag_reset(x)),
-	     "virt_to_phys used for non-linear address: %pK (%pS)\n",
+	     "virt_to_phys used for non-linear address: %p (%pS)\n",
 	      (void *)x,
 	      (void *)x);
 

---
base-commit: 0ad2507d5d93f39619fc42372c347d6006b64319
change-id: 20250217-restricted-pointers-arm64-74d54aef13f7

Best regards,
-- 
Thomas Weißschuh <thomas.weissschuh@...utronix.de>