wash/magenta
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sched: enforce ref-counting on current task/thread pointers

Browse Source
This commit is contained in:
max 🍓
2026-04-01 18:17:05 +01:00
parent 15c2207ab9
commit 512356ac2d
28 changed files with 364 additions and 103 deletions
Download Patch File Download Diff File Expand all files Collapse all files
syscall/vm-object.c
+25 -6
View File
@@ -11,13 +11,15 @@ kern_status_t sys_vm_object_create(
vm_prot_t prot,
kern_handle_t *out_handle)
{
struct task *self = current_task();
struct task *self = get_current_task();
if ((name || name_len) && !validate_access_r(self, name, name_len)) {
put_current_task(self);
return KERN_MEMORY_FAULT;
}
if (!validate_access_w(self, out_handle, sizeof *out_handle)) {
put_current_task(self);
return KERN_MEMORY_FAULT;
}
@@ -30,6 +32,7 @@ kern_status_t sys_vm_object_create(
kern_status_t status
= task_open_handle(self, &obj->vo_base, 0, out_handle);
object_unref(&obj->vo_base);
put_current_task(self);
return status;
}
@@ -41,13 +44,15 @@ kern_status_t sys_vm_object_read(
size_t count,
size_t *nr_read)
{
struct task *self = current_task();
struct task *self = get_current_task();
if (!validate_access_w(self, dst, count)) {
put_current_task(self);
return KERN_MEMORY_FAULT;
}
if (nr_read && !validate_access_w(self, nr_read, sizeof *nr_read)) {
put_current_task(self);
return KERN_MEMORY_FAULT;
}
@@ -55,15 +60,19 @@ kern_status_t sys_vm_object_read(
handle_flags_t flags = 0;
kern_status_t status = task_resolve_handle(self, object, &obj, &flags);
if (status != KERN_OK) {
put_current_task(self);
return status;
}
struct vm_object *vmo = vm_object_cast(obj);
if (!vmo) {
put_current_task(self);
return KERN_INVALID_ARGUMENT;
}
return vm_object_read(vmo, dst, offset, count, nr_read);
status = vm_object_read(vmo, dst, offset, count, nr_read);
put_current_task(self);
return status;
}
kern_status_t sys_vm_object_write(
@@ -73,14 +82,16 @@ kern_status_t sys_vm_object_write(
size_t count,
size_t *nr_written)
{
struct task *self = current_task();
struct task *self = get_current_task();
if (!validate_access_r(self, src, count)) {
put_current_task(self);
return KERN_MEMORY_FAULT;
}
if (nr_written
&& !validate_access_w(self, nr_written, sizeof *nr_written)) {
put_current_task(self);
return KERN_MEMORY_FAULT;
}
@@ -88,15 +99,19 @@ kern_status_t sys_vm_object_write(
handle_flags_t flags = 0;
kern_status_t status = task_resolve_handle(self, object, &obj, &flags);
if (status != KERN_OK) {
put_current_task(self);
return status;
}
struct vm_object *vmo = vm_object_cast(obj);
if (!vmo) {
put_current_task(self);
return KERN_INVALID_ARGUMENT;
}
return vm_object_write(vmo, src, offset, count, nr_written);
status = vm_object_write(vmo, src, offset, count, nr_written);
put_current_task(self);
return status;
}
kern_status_t sys_vm_object_copy(
@@ -114,10 +129,11 @@ kern_status_t sys_vm_object_copy(
src_offset,
count,
nr_copied);
struct task *self = current_task();
struct task *self = get_current_task();
if (nr_copied
&& !validate_access_w(self, nr_copied, sizeof *nr_copied)) {
put_current_task(self);
return KERN_MEMORY_FAULT;
}
@@ -131,16 +147,19 @@ kern_status_t sys_vm_object_copy(
status = task_resolve_handle(self, dst, &dst_obj, &dst_flags);
if (status != KERN_OK) {
task_unlock_irqrestore(self, flags);
put_current_task(self);
return status;
}
status = task_resolve_handle(self, src, &src_obj, &src_flags);
if (status != KERN_OK) {
task_unlock_irqrestore(self, flags);
put_current_task(self);
return status;
}
task_unlock_irqrestore(self, flags);
put_current_task(self);
struct vm_object *dst_vmo = vm_object_cast(dst_obj);
struct vm_object *src_vmo = vm_object_cast(src_obj);