diff options
| author | Andrey Konovalov <andreyknvl@google.com> | 2022-03-24 18:12:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-24 19:06:49 -0700 |
| commit | 1e0f611fab9c5743719a95e09a2846e4052fd644 (patch) | |
| tree | f1626a4f071dd091848ff47e35bce69849a0f4b2 | |
| parent | 16347c31890375d2a7eb9efb01d2baac28742de3 (diff) | |
| download | linux-1e0f611fab9c5743719a95e09a2846e4052fd644.tar.gz | |
kasan: print basic stack frame info for SW_TAGS
Software Tag-Based mode tags stack allocations when CONFIG_KASAN_STACK
is enabled. Print task name and id in reports for stack-related bugs.
[andreyknvl@google.com: include linux/sched/task_stack.h]
Link: https://lkml.kernel.org/r/d7598f11a34ed96e508f7640fa038662ed2305ec.1647099922.git.andreyknvl@google.com
Link: https://lkml.kernel.org/r/029aaa87ceadde0702f3312a34697c9139c9fb53.1646237226.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/kasan/kasan.h | 2 | ||||
| -rw-r--r-- | mm/kasan/report_sw_tags.c | 12 |
2 files changed, 13 insertions, 1 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index d1e111b7d5d810..4447df0d7343f2 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -274,7 +274,7 @@ void *kasan_find_first_bad_addr(void *addr, size_t size); const char *kasan_get_bug_type(struct kasan_access_info *info); void kasan_metadata_fetch_row(char *buffer, void *row); -#if defined(CONFIG_KASAN_GENERIC) && defined(CONFIG_KASAN_STACK) +#if defined(CONFIG_KASAN_STACK) void kasan_print_address_stack_frame(const void *addr); #else static inline void kasan_print_address_stack_frame(const void *addr) { } diff --git a/mm/kasan/report_sw_tags.c b/mm/kasan/report_sw_tags.c index d2298c35783496..7271f0988fc0d4 100644 --- a/mm/kasan/report_sw_tags.c +++ b/mm/kasan/report_sw_tags.c @@ -16,6 +16,7 @@ #include <linux/mm.h> #include <linux/printk.h> #include <linux/sched.h> +#include <linux/sched/task_stack.h> #include <linux/slab.h> #include <linux/stackdepot.h> #include <linux/stacktrace.h> @@ -51,3 +52,14 @@ void kasan_print_tags(u8 addr_tag, const void *addr) pr_err("Pointer tag: [%02x], memory tag: [%02x]\n", addr_tag, *shadow); } + +#ifdef CONFIG_KASAN_STACK +void kasan_print_address_stack_frame(const void *addr) +{ + if (WARN_ON(!object_is_on_stack(addr))) + return; + + pr_err("The buggy address belongs to stack of task %s/%d\n", + current->comm, task_pid_nr(current)); +} +#endif |