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Mon, 27 Apr 2026 21:02:31 -0700 (PDT) From: WANG Rui To: Huacai Chen , Ard Biesheuvel Cc: WANG Xuerui , Ilias Apalodimas , Lisa Robinson , loongarch@lists.linux.dev, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, WANG Rui Subject: [PATCH v2 2/2] LoongArch: Skip relocation-time KASLR if it has already been applied Date: Tue, 28 Apr 2026 12:01:59 +0800 Message-ID: <20260428040159.1065822-3-r@hev.cc> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260428040159.1065822-1-r@hev.cc> References: <20260428040159.1065822-1-r@hev.cc> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When the kernel is relocated during early boot, a randomized load address may already have been selected and applied. In this case, performing KASLR again in relocate.c is unnecessary. Signed-off-by: WANG Rui --- arch/loongarch/kernel/relocate.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/loongarch/kernel/relocate.c b/arch/loongarch/kernel/relocate.c index 16f6a9b39659..c36604a81d08 100644 --- a/arch/loongarch/kernel/relocate.c +++ b/arch/loongarch/kernel/relocate.c @@ -139,6 +139,10 @@ static inline __init bool kaslr_disabled(void) char *str; const char *builtin_cmdline = CONFIG_CMDLINE; + /* KASLR is performed during early boot. */ + if (kaslr_offset()) + return true; + str = strstr(builtin_cmdline, "nokaslr"); if (str == builtin_cmdline || (str > builtin_cmdline && *(str - 1) == ' ')) { pr_info(KASLR_DISABLED_MESSAGE, "\'nokaslr\'", "built-in"); -- 2.54.0