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// SPDX-License-Identifier: GPL-2.0
/*
* Out-of-line refcount functions.
*/
#include <linux/refcount.h>
#include <linux/printk.h>
#define REFCOUNT_WARN(str) WARN_ONCE(1, "refcount_t: " str ".\n")
void refcount_warn_saturate(refcount_t *r, enum refcount_saturation_type t)
{
refcount_set(r, REFCOUNT_SATURATED);
switch (t) {
case REFCOUNT_ADD_NOT_ZERO_OVF:
REFCOUNT_WARN("saturated; leaking memory");
break;
case REFCOUNT_ADD_OVF:
REFCOUNT_WARN("saturated; leaking memory");
break;
case REFCOUNT_ADD_UAF:
REFCOUNT_WARN("addition on 0; use-after-free");
break;
case REFCOUNT_SUB_UAF:
REFCOUNT_WARN("underflow; use-after-free");
break;
case REFCOUNT_DEC_LEAK:
REFCOUNT_WARN("decrement hit 0; leaking memory");
break;
default:
REFCOUNT_WARN("unknown saturation event!?");
}
}
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