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Tue, 23 Dec 2025 23:08:37 -0800 (PST) Received: from zeus ([2405:6580:83a0:7600:6e93:a15a:9134:ae1f]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-34e9219f165sm14789330a91.3.2025.12.23.23.08.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Dec 2025 23:08:36 -0800 (PST) From: Ryosuke Yasuoka To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com Cc: Ryosuke Yasuoka , x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] x86/traps: Print unhashed pointers on stack overflow Date: Wed, 24 Dec 2025 16:07:32 +0900 Message-ID: <20251224070735.454816-1-ryasuoka@redhat.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When a stack overflow occurs, the kernel prints hashed fault address and the stack range using %p. The actual addresses are required for debugging and hashed pointers provide no useful information in this context. Use %px to print the unhashed, raw addresses. Signed-off-by: Ryosuke Yasuoka --- arch/x86/kernel/traps.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index bcf1dedc1d00..5a6a772e0a6c 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -549,7 +549,7 @@ __visible void __noreturn handle_stack_overflow(struct = pt_regs *regs, { const char *name =3D stack_type_name(info->type); =20 - printk(KERN_EMERG "BUG: %s stack guard page was hit at %p (stack is %p..%= p)\n", + printk(KERN_EMERG "BUG: %s stack guard page was hit at %px (stack is %px.= .%px)\n", name, (void *)fault_address, info->begin, info->end); =20 die("stack guard page", regs, 0); base-commit: b927546677c876e26eba308550207c2ddf812a43 --=20 2.52.0