From: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Subject: kasan: move kasan_report() into report.c The kasan_report() functions belongs to report.c, as it's a common functions that does error reporting. Link: http://lkml.kernel.org/r/78a81fde6eeda9db72a7fd55fbc33173a515e4b1.1589297433.git.andreyknvl@xxxxxxxxxx Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Reported-by: Leon Romanovsky <leon@xxxxxxxxxx> Tested-by: Leon Romanovsky <leon@xxxxxxxxxx> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Cc: Alexander Potapenko <glider@xxxxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: Leon Romanovsky <leonro@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/kasan/common.c | 19 ------------------- mm/kasan/report.c | 22 ++++++++++++++++++++-- 2 files changed, 20 insertions(+), 21 deletions(-) --- a/mm/kasan/common.c~kasan-move-kasan_report-into-reportc +++ a/mm/kasan/common.c @@ -33,7 +33,6 @@ #include <linux/types.h> #include <linux/vmalloc.h> #include <linux/bug.h> -#include <linux/uaccess.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> @@ -613,24 +612,6 @@ void kasan_free_shadow(const struct vm_s } #endif -extern void __kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip); -extern bool report_enabled(void); - -bool kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip) -{ - unsigned long flags = user_access_save(); - bool ret = false; - - if (likely(report_enabled())) { - __kasan_report(addr, size, is_write, ip); - ret = true; - } - - user_access_restore(flags); - - return ret; -} - #ifdef CONFIG_MEMORY_HOTPLUG static bool shadow_mapped(unsigned long addr) { --- a/mm/kasan/report.c~kasan-move-kasan_report-into-reportc +++ a/mm/kasan/report.c @@ -29,6 +29,7 @@ #include <linux/kasan.h> #include <linux/module.h> #include <linux/sched/task_stack.h> +#include <linux/uaccess.h> #include <asm/sections.h> @@ -454,7 +455,7 @@ static void print_shadow_for_address(con } } -bool report_enabled(void) +static bool report_enabled(void) { if (current->kasan_depth) return false; @@ -479,7 +480,8 @@ void kasan_report_invalid_free(void *obj end_report(&flags); } -void __kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip) +static void __kasan_report(unsigned long addr, size_t size, bool is_write, + unsigned long ip) { struct kasan_access_info info; void *tagged_addr; @@ -518,6 +520,22 @@ void __kasan_report(unsigned long addr, end_report(&flags); } +bool kasan_report(unsigned long addr, size_t size, bool is_write, + unsigned long ip) +{ + unsigned long flags = user_access_save(); + bool ret = false; + + if (likely(report_enabled())) { + __kasan_report(addr, size, is_write, ip); + ret = true; + } + + user_access_restore(flags); + + return ret; +} + #ifdef CONFIG_KASAN_INLINE /* * With CONFIG_KASAN_INLINE, accesses to bogus pointers (outside the high _
