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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

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Conflicts were simple overlapping changes in microchip
driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2018-04-21 16:31:52 -04:00
parent 0638eb573c 83beed7b2b
commit e0ada51db9
1035 changed files with 34325 additions and 20963 deletions
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43
samples/livepatch/livepatch-shadow-fix1.c
View File

@@ -56,6 +56,21 @@ struct dummy {
unsigned long jiffies_expire;
};
/*
* The constructor makes more sense together with klp_shadow_get_or_alloc().
* In this example, it would be safe to assign the pointer also to the shadow
* variable returned by klp_shadow_alloc(). But we wanted to show the more
* complicated use of the API.
*/
static int shadow_leak_ctor(void *obj, void *shadow_data, void *ctor_data)
{
void **shadow_leak = shadow_data;
void *leak = ctor_data;
*shadow_leak = leak;
return 0;
}
struct dummy *livepatch_fix1_dummy_alloc(void)
{
struct dummy *d;
@@ -74,7 +89,8 @@ struct dummy *livepatch_fix1_dummy_alloc(void)
* pointer to handle resource release.
*/
leak = kzalloc(sizeof(int), GFP_KERNEL);
klp_shadow_alloc(d, SV_LEAK, &leak, sizeof(leak), GFP_KERNEL);
klp_shadow_alloc(d, SV_LEAK, sizeof(leak), GFP_KERNEL,
shadow_leak_ctor, leak);
pr_info("%s: dummy @ %p, expires @ %lx\n",
__func__, d, d->jiffies_expire);
@@ -82,9 +98,19 @@ struct dummy *livepatch_fix1_dummy_alloc(void)
return d;
}
static void livepatch_fix1_dummy_leak_dtor(void *obj, void *shadow_data)
{
void *d = obj;
void **shadow_leak = shadow_data;
kfree(*shadow_leak);
pr_info("%s: dummy @ %p, prevented leak @ %p\n",
__func__, d, *shadow_leak);
}
void livepatch_fix1_dummy_free(struct dummy *d)
{
void **shadow_leak, *leak;
void **shadow_leak;
/*
* Patch: fetch the saved SV_LEAK shadow variable, detach and
@@ -93,15 +119,10 @@ void livepatch_fix1_dummy_free(struct dummy *d)
* was loaded.)
*/
shadow_leak = klp_shadow_get(d, SV_LEAK);
if (shadow_leak) {
leak = *shadow_leak;
klp_shadow_free(d, SV_LEAK);
kfree(leak);
pr_info("%s: dummy @ %p, prevented leak @ %p\n",
__func__, d, leak);
} else {
if (shadow_leak)
klp_shadow_free(d, SV_LEAK, livepatch_fix1_dummy_leak_dtor);
else
pr_info("%s: dummy @ %p leaked!\n", __func__, d);
}
kfree(d);
}
@@ -147,7 +168,7 @@ static int livepatch_shadow_fix1_init(void)
static void livepatch_shadow_fix1_exit(void)
{
/* Cleanup any existing SV_LEAK shadow variables */
klp_shadow_free_all(SV_LEAK);
klp_shadow_free_all(SV_LEAK, livepatch_fix1_dummy_leak_dtor);
WARN_ON(klp_unregister_patch(&patch));
}

33
samples/livepatch/livepatch-shadow-fix2.c
View File

@@ -53,39 +53,42 @@ struct dummy {
bool livepatch_fix2_dummy_check(struct dummy *d, unsigned long jiffies)
{
int *shadow_count;
int count;
/*
* Patch: handle in-flight dummy structures, if they do not
* already have a SV_COUNTER shadow variable, then attach a
* new one.
*/
count = 0;
shadow_count = klp_shadow_get_or_alloc(d, SV_COUNTER,
&count, sizeof(count),
GFP_NOWAIT);
sizeof(*shadow_count), GFP_NOWAIT,
NULL, NULL);
if (shadow_count)
*shadow_count += 1;
return time_after(jiffies, d->jiffies_expire);
}
static void livepatch_fix2_dummy_leak_dtor(void *obj, void *shadow_data)
{
void *d = obj;
void **shadow_leak = shadow_data;
kfree(*shadow_leak);
pr_info("%s: dummy @ %p, prevented leak @ %p\n",
__func__, d, *shadow_leak);
}
void livepatch_fix2_dummy_free(struct dummy *d)
{
void **shadow_leak, *leak;
void **shadow_leak;
int *shadow_count;
/* Patch: copy the memory leak patch from the fix1 module. */
shadow_leak = klp_shadow_get(d, SV_LEAK);
if (shadow_leak) {
leak = *shadow_leak;
klp_shadow_free(d, SV_LEAK);
kfree(leak);
pr_info("%s: dummy @ %p, prevented leak @ %p\n",
__func__, d, leak);
} else {
if (shadow_leak)
klp_shadow_free(d, SV_LEAK, livepatch_fix2_dummy_leak_dtor);
else
pr_info("%s: dummy @ %p leaked!\n", __func__, d);
}
/*
* Patch: fetch the SV_COUNTER shadow variable and display
@@ -95,7 +98,7 @@ void livepatch_fix2_dummy_free(struct dummy *d)
if (shadow_count) {
pr_info("%s: dummy @ %p, check counter = %d\n",
__func__, d, *shadow_count);
klp_shadow_free(d, SV_COUNTER);
klp_shadow_free(d, SV_COUNTER, NULL);
}
kfree(d);
@@ -142,7 +145,7 @@ static int livepatch_shadow_fix2_init(void)
static void livepatch_shadow_fix2_exit(void)
{
/* Cleanup any existing SV_COUNTER shadow variables */
klp_shadow_free_all(SV_COUNTER);
klp_shadow_free_all(SV_COUNTER, NULL);
WARN_ON(klp_unregister_patch(&patch));
}