check_kprobe_address_safe

Name:check_kprobe_address_safe

Proto:static int check_kprobe_address_safe(struct kprobe *p, struct module **probed_mod)

Type:int

Parameter:

Type	Parameter	Name
struct kprobe *	p
struct module **	probed_mod

1553

ret = arch_check_ftrace_location(p)

1554

If ret Then Return ret

1556

jump_label_lock()

1557

Even if we don't have any preemption, we need preempt disable/enable* to be barriers, so that we don't have things like get_user/put_user* that can cause faults and scheduling migrate into our preempt-protected* region.()

1560

If Not kernel_text_address((unsignedlong) location of the probe point ) || within_kprobe_blacklist((unsignedlong) location of the probe point ) || jump_label_text_reserved( location of the probe point , location of the probe point ) || find_bug((unsignedlong) location of the probe point ) Then

1564

1565

Go to out

1569

probed_mod = __module_text_address - get the module whose code contains an address.*@addr: the address.* Must be called with preempt disabled or module mutex held so that* module doesn't get freed during this.

1570

If probed_mod Then

1575

If Value for the false possibility is greater at compile time(!try_module_get( * probed_mod)) Then

1576

1577

Go to out

1584

If within_module_init((unsignedlong) location of the probe point , * probed_mod) && state != Full formed, running module_init. Then

1586

module_put( * probed_mod)

1587

* probed_mod = NULL

1588

1591

out :

1592

preempt_enable()

1593

jump_label_unlock()

1595

Return ret

**Caller**
Name	Describe
register_kprobe

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