From: Alexander Lobakin <alobakin@pm.me>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Cercueil <paul@crapouillou.net>,
Alexander Lobakin <alobakin@pm.me>,
Youling Tang <tangyouling@loongson.cn>,
Jiaxun Yang <jiaxun.yang@flygoat.com>,
Xingxing Su <suxingxing@loongson.cn>,
Huacai Chen <chenhuacai@kernel.org>,
Paul Burton <paulburton@kernel.org>,
Hassan Naveed <hnaveed@wavecomp.com>,
linux-mips@vger.kernel.org, stable@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH mips-fixes] MIPS: compressed: fix build with enabled UBSAN
Date: Mon, 08 Feb 2021 12:37:42 +0000 [thread overview]
Message-ID: <20210208123645.101354-1-alobakin@pm.me> (raw)
Commit 1e35918ad9d1 ("MIPS: Enable Undefined Behavior Sanitizer
UBSAN") added a possibility to build the entire kernel with UBSAN
instrumentation for MIPS, with the exception for VDSO.
However, self-extracting head wasn't been added to exceptions, so
this occurs:
mips-alpine-linux-musl-ld: arch/mips/boot/compressed/decompress.o:
in function `FSE_buildDTable_wksp':
decompress.c:(.text.FSE_buildDTable_wksp+0x278): undefined reference
to `__ubsan_handle_shift_out_of_bounds'
mips-alpine-linux-musl-ld: decompress.c:(.text.FSE_buildDTable_wksp+0x2a8):
undefined reference to `__ubsan_handle_shift_out_of_bounds'
mips-alpine-linux-musl-ld: decompress.c:(.text.FSE_buildDTable_wksp+0x2c4):
undefined reference to `__ubsan_handle_shift_out_of_bounds'
mips-alpine-linux-musl-ld: arch/mips/boot/compressed/decompress.o:
decompress.c:(.text.FSE_buildDTable_raw+0x9c): more undefined references
to `__ubsan_handle_shift_out_of_bounds' follow
Add UBSAN_SANITIZE := n to mips/boot/compressed/Makefile to exclude
it from instrumentation scope and fix this issue.
Fixes: 1e35918ad9d1 ("MIPS: Enable Undefined Behavior Sanitizer UBSAN")
Cc: stable@vger.kernel.org # 5.0+
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
---
arch/mips/boot/compressed/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
index 47cd9dc7454a..f93f72bcba97 100644
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -37,6 +37,7 @@ KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
GCOV_PROFILE := n
+UBSAN_SANITIZE := n
# decompressor objects (linked with vmlinuz)
vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o
--
2.30.0
next reply other threads:[~2021-02-08 12:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-08 12:37 Alexander Lobakin [this message]
2021-02-09 12:38 ` [PATCH mips-fixes] MIPS: compressed: fix build with enabled UBSAN Thomas Bogendoerfer
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