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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, kernel test robot <lkp@intel.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Arnd Bergmann <arnd@arndb.de>,
	"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Subject: [PATCH 4.14 02/25] ARM: 9134/1: remove duplicate memcpy() definition
Date: Mon,  1 Nov 2021 10:17:14 +0100	[thread overview]
Message-ID: <20211101082447.604888983@linuxfoundation.org> (raw)
In-Reply-To: <20211101082447.070493993@linuxfoundation.org>

From: Arnd Bergmann <arnd@arndb.de>

commit eaf6cc7165c9c5aa3c2f9faa03a98598123d0afb upstream.

Both the decompressor code and the kasan logic try to override
the memcpy() and memmove()  definitions, which leading to a clash
in a KASAN-enabled kernel with XZ decompression:

arch/arm/boot/compressed/decompress.c:50:9: error: 'memmove' macro redefined [-Werror,-Wmacro-redefined]
 #define memmove memmove
        ^
arch/arm/include/asm/string.h:59:9: note: previous definition is here
 #define memmove(dst, src, len) __memmove(dst, src, len)
        ^
arch/arm/boot/compressed/decompress.c:51:9: error: 'memcpy' macro redefined [-Werror,-Wmacro-redefined]
 #define memcpy memcpy
        ^
arch/arm/include/asm/string.h:58:9: note: previous definition is here
 #define memcpy(dst, src, len) __memcpy(dst, src, len)
        ^

Here we want the set of functions from the decompressor, so undefine
the other macros before the override.

Link: https://lore.kernel.org/linux-arm-kernel/CACRpkdZYJogU_SN3H9oeVq=zJkRgRT1gDz3xp59gdqWXxw-B=w@mail.gmail.com/
Link: https://lore.kernel.org/lkml/202105091112.F5rmd4By-lkp@intel.com/

Fixes: d6d51a96c7d6 ("ARM: 9014/2: Replace string mem* functions for KASan")
Fixes: a7f464f3db93 ("ARM: 7001/2: Wire up support for the XZ decompressor")
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm/boot/compressed/decompress.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/arm/boot/compressed/decompress.c
+++ b/arch/arm/boot/compressed/decompress.c
@@ -49,7 +49,10 @@ extern int memcmp(const void *cs, const
 #endif
 
 #ifdef CONFIG_KERNEL_XZ
+/* Prevent KASAN override of string helpers in decompressor */
+#undef memmove
 #define memmove memmove
+#undef memcpy
 #define memcpy memcpy
 #include "../../../../lib/decompress_unxz.c"
 #endif



  parent reply	other threads:[~2021-11-01  9:21 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-01  9:17 [PATCH 4.14 00/25] 4.14.254-rc1 review Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 01/25] ARM: 9133/1: mm: proc-macros: ensure *_tlb_fns are 4B aligned Greg Kroah-Hartman
2021-11-01  9:17 ` Greg Kroah-Hartman [this message]
2021-11-01  9:17 ` [PATCH 4.14 03/25] ARM: 9139/1: kprobes: fix arch_init_kprobes() prototype Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 04/25] powerpc/bpf: Fix BPF_MOD when imm == 1 Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 05/25] ARM: 8819/1: Remove -p from LDFLAGS Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 06/25] usbnet: sanity check for maxpacket Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 07/25] usbnet: fix error return code in usbnet_probe() Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 08/25] ata: sata_mv: Fix the error handling of mv_chip_id() Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 09/25] nfc: port100: fix using -ERRNO as command type mask Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 10/25] Revert "net: mdiobus: Fix memory leak in __mdiobus_register" Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 11/25] ipv4: use siphash instead of Jenkins in fnhe_hashfun() Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 12/25] mmc: vub300: fix control-message timeouts Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 13/25] mmc: dw_mmc: exynos: fix the finding clock sample value Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 14/25] mmc: sdhci: Map more voltage level to SDHCI_POWER_330 Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 15/25] mmc: sdhci-esdhc-imx: clear the buffer_read_ready to reset standard tuning circuit Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 16/25] net: lan78xx: fix division by zero in send path Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 17/25] regmap: Fix possible double-free in regcache_rbtree_exit() Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 18/25] net: batman-adv: fix error handling Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 19/25] nios2: Make NIOS2_DTB_SOURCE_BOOL depend on !COMPILE_TEST Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 20/25] net: nxp: lpc_eth.c: avoid hang when bringing interface down Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 21/25] sctp: use init_tag from inithdr for ABORT chunk Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 22/25] sctp: fix the processing for COOKIE_ECHO chunk Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 23/25] sctp: add vtag check in sctp_sf_violation Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 24/25] sctp: add vtag check in sctp_sf_do_8_5_1_E_sa Greg Kroah-Hartman
2021-11-01  9:17 ` [PATCH 4.14 25/25] sctp: add vtag check in sctp_sf_ootb Greg Kroah-Hartman
2021-11-01 11:14 ` [PATCH 4.14 00/25] 4.14.254-rc1 review Naresh Kamboju

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