From: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Subject: kasan: reorder reporting functions Move print_error_description()'s, report_suppressed()'s, and report_enabled()'s definitions to improve the logical order of function definitions in report.c. No functional changes. Link: https://lkml.kernel.org/r/82aa926c411e00e76e97e645a551ede9ed0c5e79.1646237226.git.andreyknvl@xxxxxxxxxx Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Cc: Alexander Potapenko <glider@xxxxxxxxxx> Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: Marco Elver <elver@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/kasan/report.c | 82 ++++++++++++++++++++++---------------------- 1 file changed, 41 insertions(+), 41 deletions(-) --- a/mm/kasan/report.c~kasan-reorder-reporting-functions +++ a/mm/kasan/report.c @@ -84,24 +84,29 @@ static int __init kasan_set_multi_shot(c } __setup("kasan_multi_shot", kasan_set_multi_shot); -static void print_error_description(struct kasan_report_info *info) +/* + * Used to suppress reports within kasan_disable/enable_current() critical + * sections, which are used for marking accesses to slab metadata. + */ +static bool report_suppressed(void) { - if (info->type == KASAN_REPORT_INVALID_FREE) { - pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", - (void *)info->ip); - return; - } +#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) + if (current->kasan_depth) + return true; +#endif + return false; +} - pr_err("BUG: KASAN: %s in %pS\n", - kasan_get_bug_type(info), (void *)info->ip); - if (info->access_size) - pr_err("%s of size %zu at addr %px by task %s/%d\n", - info->is_write ? "Write" : "Read", info->access_size, - info->access_addr, current->comm, task_pid_nr(current)); - else - pr_err("%s at addr %px by task %s/%d\n", - info->is_write ? "Write" : "Read", - info->access_addr, current->comm, task_pid_nr(current)); +/* + * Used to avoid reporting more than one KASAN bug unless kasan_multi_shot + * is enabled. Note that KASAN tests effectively enable kasan_multi_shot + * for their duration. + */ +static bool report_enabled(void) +{ + if (test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags)) + return true; + return !test_and_set_bit(KASAN_BIT_REPORTED, &kasan_flags); } #if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST) @@ -160,6 +165,26 @@ static void end_report(unsigned long *fl kasan_enable_current(); } +static void print_error_description(struct kasan_report_info *info) +{ + if (info->type == KASAN_REPORT_INVALID_FREE) { + pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", + (void *)info->ip); + return; + } + + pr_err("BUG: KASAN: %s in %pS\n", + kasan_get_bug_type(info), (void *)info->ip); + if (info->access_size) + pr_err("%s of size %zu at addr %px by task %s/%d\n", + info->is_write ? "Write" : "Read", info->access_size, + info->access_addr, current->comm, task_pid_nr(current)); + else + pr_err("%s at addr %px by task %s/%d\n", + info->is_write ? "Write" : "Read", + info->access_addr, current->comm, task_pid_nr(current)); +} + static void print_track(struct kasan_track *track, const char *prefix) { pr_err("%s by task %u:\n", prefix, track->pid); @@ -381,31 +406,6 @@ static void print_memory_metadata(const } } -/* - * Used to suppress reports within kasan_disable/enable_current() critical - * sections, which are used for marking accesses to slab metadata. - */ -static bool report_suppressed(void) -{ -#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) - if (current->kasan_depth) - return true; -#endif - return false; -} - -/* - * Used to avoid reporting more than one KASAN bug unless kasan_multi_shot - * is enabled. Note that KASAN tests effectively enable kasan_multi_shot - * for their duration. - */ -static bool report_enabled(void) -{ - if (test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags)) - return true; - return !test_and_set_bit(KASAN_BIT_REPORTED, &kasan_flags); -} - static void print_report(struct kasan_report_info *info) { void *tagged_addr = info->access_addr; _
