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(haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 6ACA2600D6; Thu, 14 Dec 2023 16:56:19 +1100 (AEDT) From: Nicholas Miehlbradt To: glider@google.com, elver@google.com, dvyukov@google.com, akpm@linux-foundation.org, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu Cc: linux-mm@kvack.org, kasan-dev@googlegroups.com, iii@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Nicholas Miehlbradt Subject: [PATCH 03/13] powerpc: Disable KMSAN santitization for prom_init, vdso and purgatory Date: Thu, 14 Dec 2023 05:55:29 +0000 Message-Id: <20231214055539.9420-4-nicholas@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231214055539.9420-1-nicholas@linux.ibm.com> References: <20231214055539.9420-1-nicholas@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: tGzZF3E5YBSAEi-LT31YAzRubiKi2f0r X-Proofpoint-GUID: BEavQEDS5PQBgWzLfLd3K1kN0uk1GSRB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-14_02,2023-12-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 priorityscore=1501 suspectscore=0 spamscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 mlxscore=0 mlxlogscore=431 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312140035 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Other sanitizers are disabled for these, disable KMSAN too. prom_init.o can only reference a limited set of external symbols. KMSAN adds additional references which are not permitted so disable sanitization. Signed-off-by: Nicholas Miehlbradt --- arch/powerpc/kernel/Makefile | 2 ++ arch/powerpc/kernel/vdso/Makefile | 1 + arch/powerpc/purgatory/Makefile | 1 + 3 files changed, 4 insertions(+) diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 2919433be355..78ea441f7e18 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -61,6 +61,8 @@ KCSAN_SANITIZE_btext.o :=3D n KCSAN_SANITIZE_paca.o :=3D n KCSAN_SANITIZE_setup_64.o :=3D n =20 +KMSAN_SANITIZE_prom_init.o :=3D n + #ifdef CONFIG_RANDOMIZE_KSTACK_OFFSET # Remove stack protector to avoid triggering unneeded stack canary # checks due to randomize_kstack_offset. diff --git a/arch/powerpc/kernel/vdso/Makefile b/arch/powerpc/kernel/vdso/M= akefile index 0c7d82c270c3..86fa6ff1ee51 100644 --- a/arch/powerpc/kernel/vdso/Makefile +++ b/arch/powerpc/kernel/vdso/Makefile @@ -52,6 +52,7 @@ KCOV_INSTRUMENT :=3D n UBSAN_SANITIZE :=3D n KASAN_SANITIZE :=3D n KCSAN_SANITIZE :=3D n +KMSAN_SANITIZE :=3D n =20 ccflags-y :=3D -fno-common -fno-builtin ldflags-y :=3D -Wl,--hash-style=3Dboth -nostdlib -shared -z noexecstack $(= CLANG_FLAGS) diff --git a/arch/powerpc/purgatory/Makefile b/arch/powerpc/purgatory/Makef= ile index 78473d69cd2b..4b267061bf84 100644 --- a/arch/powerpc/purgatory/Makefile +++ b/arch/powerpc/purgatory/Makefile @@ -2,6 +2,7 @@ =20 KASAN_SANITIZE :=3D n KCSAN_SANITIZE :=3D n +KMSAN_SANITIZE :=3D n =20 targets +=3D trampoline_$(BITS).o purgatory.ro =20 --=20 2.40.1