From: Joey Gouly Date: Tue, 1 Mar 2022 10:14:35 +0000 (+0000) Subject: Revert "arm64: Mitigate MTE issues with str{n}cmp()" X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e33c89256e66ba64ce5190c7f2c2741e619c6321;p=linux.git Revert "arm64: Mitigate MTE issues with str{n}cmp()" This reverts commit 59a68d4138086c015ab8241c3267eec5550fbd44. Now that the str{n}cmp functions have been updated to handle MTE properly, the workaround to use the generic functions is no longer needed. Signed-off-by: Joey Gouly Cc: Robin Murphy Cc: Mark Rutland Cc: Catalin Marinas Cc: Will Deacon Acked-by: Mark Rutland Acked-by: Catalin Marinas Link: https://lore.kernel.org/r/20220301101435.19327-4-joey.gouly@arm.com Signed-off-by: Will Deacon --- diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index e8bd0af0141c3..8df412178efbd 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -535,11 +535,6 @@ alternative_endif #define EXPORT_SYMBOL_NOKASAN(name) EXPORT_SYMBOL(name) #endif -#ifdef CONFIG_KASAN_HW_TAGS -#define EXPORT_SYMBOL_NOHWKASAN(name) -#else -#define EXPORT_SYMBOL_NOHWKASAN(name) EXPORT_SYMBOL_NOKASAN(name) -#endif /* * Emit a 64-bit absolute little endian symbol reference in a way that * ensures that it will be resolved at build time, even when building a diff --git a/arch/arm64/include/asm/string.h b/arch/arm64/include/asm/string.h index 95f7686b728d7..3a3264ff47b97 100644 --- a/arch/arm64/include/asm/string.h +++ b/arch/arm64/include/asm/string.h @@ -12,13 +12,11 @@ extern char *strrchr(const char *, int c); #define __HAVE_ARCH_STRCHR extern char *strchr(const char *, int c); -#ifndef CONFIG_KASAN_HW_TAGS #define __HAVE_ARCH_STRCMP extern int strcmp(const char *, const char *); #define __HAVE_ARCH_STRNCMP extern int strncmp(const char *, const char *, __kernel_size_t); -#endif #define __HAVE_ARCH_STRLEN extern __kernel_size_t strlen(const char *); diff --git a/arch/arm64/lib/strcmp.S b/arch/arm64/lib/strcmp.S index 758de77afd2f7..e6815a3dd2656 100644 --- a/arch/arm64/lib/strcmp.S +++ b/arch/arm64/lib/strcmp.S @@ -187,4 +187,4 @@ L(done): ret SYM_FUNC_END_PI(strcmp) -EXPORT_SYMBOL_NOHWKASAN(strcmp) +EXPORT_SYMBOL_NOKASAN(strcmp) diff --git a/arch/arm64/lib/strncmp.S b/arch/arm64/lib/strncmp.S index a4884b97e9a81..bc195cb866932 100644 --- a/arch/arm64/lib/strncmp.S +++ b/arch/arm64/lib/strncmp.S @@ -306,4 +306,4 @@ L(ret0): mov result, #0 ret SYM_FUNC_END_PI(strncmp) -EXPORT_SYMBOL_NOHWKASAN(strncmp) +EXPORT_SYMBOL_NOKASAN(strncmp)