2015-09-28 12:00 GMT+03:00 Dmitry Vyukov <dvyu...@google.com>: > stack = (unsigned long)task_stack_page(p); > - if (p->thread.sp < stack || p->thread.sp >= stack+THREAD_SIZE) > + /* The task can be already running at this point, so tread carefully. > */ > + fp = READ_ONCE(p->thread.sp); > + if (fp < stack || fp >= stack+THREAD_SIZE)
Since we deference fp, it should be "|| fp + sizeof(u64) >= stack + THREAD_SIZE" > return 0; > - fp = *(u64 *)(p->thread.sp); > + fp = READ_ONCE(*(u64 *)fp); > do { > if (fp < (unsigned long)stack || > - fp >= (unsigned long)stack+THREAD_SIZE) > + fp+8 >= (unsigned long)stack+THREAD_SIZE) The same as above; 'fp+8 +sizeof(u64) >= ...' > return 0; > - ip = *(u64 *)(fp+8); > + ip = READ_ONCE(*(u64 *)(fp+8)); > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/