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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:17:52 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:17:52 +0000
commit3afb00d3f86d3d924f88b56fa8285d4e9db85852 (patch)
tree95a985d3019522cea546b7d8df621369bc44fc6c /kernel/livepatch/transition.c
parentAdding debian version 6.9.12-1. (diff)
downloadlinux-3afb00d3f86d3d924f88b56fa8285d4e9db85852.tar.xz
linux-3afb00d3f86d3d924f88b56fa8285d4e9db85852.zip
Merging upstream version 6.10.3.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'kernel/livepatch/transition.c')
-rw-r--r--kernel/livepatch/transition.c54
1 files changed, 27 insertions, 27 deletions
diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c
index e54c3d60a9..ba069459c1 100644
--- a/kernel/livepatch/transition.c
+++ b/kernel/livepatch/transition.c
@@ -23,7 +23,7 @@ static DEFINE_PER_CPU(unsigned long[MAX_STACK_ENTRIES], klp_stack_entries);
struct klp_patch *klp_transition_patch;
-static int klp_target_state = KLP_UNDEFINED;
+static int klp_target_state = KLP_TRANSITION_IDLE;
static unsigned int klp_signals_cnt;
@@ -96,16 +96,16 @@ static void klp_complete_transition(void)
pr_debug("'%s': completing %s transition\n",
klp_transition_patch->mod->name,
- klp_target_state == KLP_PATCHED ? "patching" : "unpatching");
+ klp_target_state == KLP_TRANSITION_PATCHED ? "patching" : "unpatching");
- if (klp_transition_patch->replace && klp_target_state == KLP_PATCHED) {
+ if (klp_transition_patch->replace && klp_target_state == KLP_TRANSITION_PATCHED) {
klp_unpatch_replaced_patches(klp_transition_patch);
klp_discard_nops(klp_transition_patch);
}
- if (klp_target_state == KLP_UNPATCHED) {
+ if (klp_target_state == KLP_TRANSITION_UNPATCHED) {
/*
- * All tasks have transitioned to KLP_UNPATCHED so we can now
+ * All tasks have transitioned to KLP_TRANSITION_UNPATCHED so we can now
* remove the new functions from the func_stack.
*/
klp_unpatch_objects(klp_transition_patch);
@@ -123,36 +123,36 @@ static void klp_complete_transition(void)
klp_for_each_func(obj, func)
func->transition = false;
- /* Prevent klp_ftrace_handler() from seeing KLP_UNDEFINED state */
- if (klp_target_state == KLP_PATCHED)
+ /* Prevent klp_ftrace_handler() from seeing KLP_TRANSITION_IDLE state */
+ if (klp_target_state == KLP_TRANSITION_PATCHED)
klp_synchronize_transition();
read_lock(&tasklist_lock);
for_each_process_thread(g, task) {
WARN_ON_ONCE(test_tsk_thread_flag(task, TIF_PATCH_PENDING));
- task->patch_state = KLP_UNDEFINED;
+ task->patch_state = KLP_TRANSITION_IDLE;
}
read_unlock(&tasklist_lock);
for_each_possible_cpu(cpu) {
task = idle_task(cpu);
WARN_ON_ONCE(test_tsk_thread_flag(task, TIF_PATCH_PENDING));
- task->patch_state = KLP_UNDEFINED;
+ task->patch_state = KLP_TRANSITION_IDLE;
}
klp_for_each_object(klp_transition_patch, obj) {
if (!klp_is_object_loaded(obj))
continue;
- if (klp_target_state == KLP_PATCHED)
+ if (klp_target_state == KLP_TRANSITION_PATCHED)
klp_post_patch_callback(obj);
- else if (klp_target_state == KLP_UNPATCHED)
+ else if (klp_target_state == KLP_TRANSITION_UNPATCHED)
klp_post_unpatch_callback(obj);
}
pr_notice("'%s': %s complete\n", klp_transition_patch->mod->name,
- klp_target_state == KLP_PATCHED ? "patching" : "unpatching");
+ klp_target_state == KLP_TRANSITION_PATCHED ? "patching" : "unpatching");
- klp_target_state = KLP_UNDEFINED;
+ klp_target_state = KLP_TRANSITION_IDLE;
klp_transition_patch = NULL;
}
@@ -164,13 +164,13 @@ static void klp_complete_transition(void)
*/
void klp_cancel_transition(void)
{
- if (WARN_ON_ONCE(klp_target_state != KLP_PATCHED))
+ if (WARN_ON_ONCE(klp_target_state != KLP_TRANSITION_PATCHED))
return;
pr_debug("'%s': canceling patching transition, going to unpatch\n",
klp_transition_patch->mod->name);
- klp_target_state = KLP_UNPATCHED;
+ klp_target_state = KLP_TRANSITION_UNPATCHED;
klp_complete_transition();
}
@@ -218,7 +218,7 @@ static int klp_check_stack_func(struct klp_func *func, unsigned long *entries,
struct klp_ops *ops;
int i;
- if (klp_target_state == KLP_UNPATCHED) {
+ if (klp_target_state == KLP_TRANSITION_UNPATCHED) {
/*
* Check for the to-be-unpatched function
* (the func itself).
@@ -455,7 +455,7 @@ void klp_try_complete_transition(void)
struct klp_patch *patch;
bool complete = true;
- WARN_ON_ONCE(klp_target_state == KLP_UNDEFINED);
+ WARN_ON_ONCE(klp_target_state == KLP_TRANSITION_IDLE);
/*
* Try to switch the tasks to the target patch state by walking their
@@ -532,11 +532,11 @@ void klp_start_transition(void)
struct task_struct *g, *task;
unsigned int cpu;
- WARN_ON_ONCE(klp_target_state == KLP_UNDEFINED);
+ WARN_ON_ONCE(klp_target_state == KLP_TRANSITION_IDLE);
pr_notice("'%s': starting %s transition\n",
klp_transition_patch->mod->name,
- klp_target_state == KLP_PATCHED ? "patching" : "unpatching");
+ klp_target_state == KLP_TRANSITION_PATCHED ? "patching" : "unpatching");
/*
* Mark all normal tasks as needing a patch state update. They'll
@@ -578,7 +578,7 @@ void klp_init_transition(struct klp_patch *patch, int state)
struct klp_func *func;
int initial_state = !state;
- WARN_ON_ONCE(klp_target_state != KLP_UNDEFINED);
+ WARN_ON_ONCE(klp_target_state != KLP_TRANSITION_IDLE);
klp_transition_patch = patch;
@@ -589,7 +589,7 @@ void klp_init_transition(struct klp_patch *patch, int state)
klp_target_state = state;
pr_debug("'%s': initializing %s transition\n", patch->mod->name,
- klp_target_state == KLP_PATCHED ? "patching" : "unpatching");
+ klp_target_state == KLP_TRANSITION_PATCHED ? "patching" : "unpatching");
/*
* Initialize all tasks to the initial patch state to prepare them for
@@ -597,7 +597,7 @@ void klp_init_transition(struct klp_patch *patch, int state)
*/
read_lock(&tasklist_lock);
for_each_process_thread(g, task) {
- WARN_ON_ONCE(task->patch_state != KLP_UNDEFINED);
+ WARN_ON_ONCE(task->patch_state != KLP_TRANSITION_IDLE);
task->patch_state = initial_state;
}
read_unlock(&tasklist_lock);
@@ -607,19 +607,19 @@ void klp_init_transition(struct klp_patch *patch, int state)
*/
for_each_possible_cpu(cpu) {
task = idle_task(cpu);
- WARN_ON_ONCE(task->patch_state != KLP_UNDEFINED);
+ WARN_ON_ONCE(task->patch_state != KLP_TRANSITION_IDLE);
task->patch_state = initial_state;
}
/*
* Enforce the order of the task->patch_state initializations and the
* func->transition updates to ensure that klp_ftrace_handler() doesn't
- * see a func in transition with a task->patch_state of KLP_UNDEFINED.
+ * see a func in transition with a task->patch_state of KLP_TRANSITION_IDLE.
*
* Also enforce the order of the klp_target_state write and future
* TIF_PATCH_PENDING writes to ensure klp_update_patch_state() and
* __klp_sched_try_switch() don't set a task->patch_state to
- * KLP_UNDEFINED.
+ * KLP_TRANSITION_IDLE.
*/
smp_wmb();
@@ -652,7 +652,7 @@ void klp_reverse_transition(void)
pr_debug("'%s': reversing transition from %s\n",
klp_transition_patch->mod->name,
- klp_target_state == KLP_PATCHED ? "patching to unpatching" :
+ klp_target_state == KLP_TRANSITION_PATCHED ? "patching to unpatching" :
"unpatching to patching");
/*
@@ -741,7 +741,7 @@ void klp_force_transition(void)
klp_update_patch_state(idle_task(cpu));
/* Set forced flag for patches being removed. */
- if (klp_target_state == KLP_UNPATCHED)
+ if (klp_target_state == KLP_TRANSITION_UNPATCHED)
klp_transition_patch->forced = true;
else if (klp_transition_patch->replace) {
klp_for_each_patch(patch) {