linux-kernel - [PATCH v2 3/4] kexec: print out debugging message if required for kexec

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

Message-Id: <20251219093134.2268620-4-maqianga@uniontech.com>
Date: Fri, 19 Dec 2025 17:31:33 +0800
From: Qiang Ma <maqianga@...ontech.com>
To: akpm@...ux-foundation.org,
	bhe@...hat.com,
	catalin.marinas@....com,
	will@...nel.org
Cc: kexec@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Qiang Ma <maqianga@...ontech.com>
Subject: [PATCH v2 3/4] kexec: print out debugging message if required for kexec_load

The commit a85ee18c7900 ("kexec_file: print out debugging message
if required") has added general code printing in kexec_file_load(),
but not in kexec_load().

As a result, when using '-d' for the kexec_load interface,
print nothing in the kernel space.

Since the segments debugging message has already been printed by the
user-space tool kexec-tools, it will not be printed here in the
kernel space.

And print out type/start/head of kimage and flags to help debug.

Signed-off-by: Qiang Ma <maqianga@...ontech.com>
---
 kernel/kexec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/kexec.c b/kernel/kexec.c
index f6c58c767eb0..37e4ac8af9f3 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -166,6 +166,9 @@ static int do_kexec_load(unsigned long entry, unsigned long nr_segments,
 	if (ret)
 		goto out;

+	kexec_dprintk("kexec_load: type:%u, start:0x%lx head:0x%lx flags:0x%lx\n",
+		      image->type, image->start, image->head, flags);
+
 	/* Install the new kernel and uninstall the old */
 	image = xchg(dest_image, image);

-- 
2.20.1