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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20250217-restricted-pointers-riscv-v1-1-72a078076a76@linutronix.de>
Date: Mon, 17 Feb 2025 08:37:58 +0100
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH] riscv: 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/riscv/mm/physaddr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/mm/physaddr.c b/arch/riscv/mm/physaddr.c
index 18706f457da7ecf84591510ea26789f7ae3e9abf..559d291fac5c62271a0e793321c97b87bf4e1b3c 100644
--- a/arch/riscv/mm/physaddr.c
+++ b/arch/riscv/mm/physaddr.c
@@ -12,7 +12,7 @@ phys_addr_t __virt_to_phys(unsigned long x)
 	 * Boundary checking aginst the kernel linear mapping space.
 	 */
 	WARN(!is_linear_mapping(x) && !is_kernel_mapping(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);
 
 	return __va_to_pa_nodebug(x);

---
base-commit: 0ad2507d5d93f39619fc42372c347d6006b64319
change-id: 20250217-restricted-pointers-riscv-62ca6d5fbf14

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