diff options
| -rw-r--r-- | mm/kasan/kasan.c | 3 | ||||
| -rw-r--r-- | mm/kasan/kasan.h | 2 | ||||
| -rw-r--r-- | mm/kasan/report.c | 30 |
3 files changed, 17 insertions, 18 deletions
diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c index 98b27195e38b..9348d27088c1 100644 --- a/mm/kasan/kasan.c +++ b/mm/kasan/kasan.c @@ -577,7 +577,8 @@ bool kasan_slab_free(struct kmem_cache *cache, void *object) shadow_byte = READ_ONCE(*(s8 *)kasan_mem_to_shadow(object)); if (shadow_byte < 0 || shadow_byte >= KASAN_SHADOW_SCALE_SIZE) { - kasan_report_double_free(cache, object, shadow_byte); + kasan_report_double_free(cache, object, + __builtin_return_address(1)); return true; } diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index dd2dea8eb077..1229298cce64 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -99,7 +99,7 @@ static inline const void *kasan_shadow_to_mem(const void *shadow_addr) void kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip); void kasan_report_double_free(struct kmem_cache *cache, void *object, - s8 shadow); + void *ip); #if defined(CONFIG_SLAB) || defined(CONFIG_SLUB) void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache); diff --git a/mm/kasan/report.c b/mm/kasan/report.c index b015acc80876..7d3d9670e233 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -243,22 +243,8 @@ static void describe_object(struct kmem_cache *cache, void *object, describe_object_addr(cache, object, addr); } -void kasan_report_double_free(struct kmem_cache *cache, void *object, - s8 shadow) -{ - unsigned long flags; - - kasan_start_report(&flags); - pr_err("BUG: Double free or freeing an invalid pointer\n"); - pr_err("Unexpected shadow byte: 0x%hhX\n", shadow); - dump_stack(); - describe_object(cache, object, NULL); - kasan_end_report(&flags); -} - -static void print_address_description(struct kasan_access_info *info) +static void print_address_description(void *addr) { - void *addr = (void *)info->access_addr; struct page *page = addr_to_page(addr); dump_stack(); @@ -333,6 +319,18 @@ static void print_shadow_for_address(const void *addr) } } +void kasan_report_double_free(struct kmem_cache *cache, void *object, + void *ip) +{ + unsigned long flags; + + kasan_start_report(&flags); + pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", ip); + print_address_description(object); + print_shadow_for_address(object); + kasan_end_report(&flags); +} + static void kasan_report_error(struct kasan_access_info *info) { unsigned long flags; @@ -344,7 +342,7 @@ static void kasan_report_error(struct kasan_access_info *info) if (!addr_has_shadow(info)) { dump_stack(); } else { - print_address_description(info); + print_address_description((void *)info->access_addr); print_shadow_for_address(info->first_bad_addr); } |