From: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Subject: kasan: improve stack frame info in reports - Print at least task name and id for reports affecting allocas (get_address_stack_frame_info() does not support them). - Capitalize first letter of each sentence. Link: https://lkml.kernel.org/r/aa613f097c12f7b75efb17f2618ae00480fb4bc3.1646237226.git.andreyknvl@xxxxxxxxxx Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Reviewed-by: 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_generic.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/mm/kasan/report_generic.c~kasan-improve-stack-frame-info-in-reports +++ a/mm/kasan/report_generic.c @@ -180,7 +180,7 @@ static void print_decoded_frame_descr(co return; pr_err("\n"); - pr_err("this frame has %lu %s:\n", num_objects, + pr_err("This frame has %lu %s:\n", num_objects, num_objects == 1 ? "object" : "objects"); while (num_objects--) { @@ -266,13 +266,14 @@ void kasan_print_address_stack_frame(con 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)); + if (!get_address_stack_frame_info(addr, &offset, &frame_descr, &frame_pc)) return; - pr_err("\n"); - pr_err("addr %px is located in stack of task %s/%d at offset %lu in frame:\n", - addr, current->comm, task_pid_nr(current), offset); + pr_err(" and is located at offset %lu in frame:\n", offset); pr_err(" %pS\n", frame_pc); if (!frame_descr) _
