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Kernel: check all threads in validate_pointer_access

This commit is contained in:
Bananymous 2025-08-05 00:10:29 +03:00
parent 1cc0fb9c01
commit dfdfb7cdaf
1 changed files with 5 additions and 8 deletions
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13
kernel/kernel/Process.cpp
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@ -3152,9 +3152,8 @@ namespace Kernel
BAN::ErrorOr<void> Process::validate_pointer_access_check(const void* ptr, size_t size, bool needs_write)
{
ASSERT(&Process::current() == this);
auto& thread = Thread::current();
vaddr_t vaddr = (vaddr_t)ptr;
const vaddr_t vaddr = reinterpret_cast<vaddr_t>(ptr);
// NOTE: detect overflow
if (vaddr + size < vaddr)
@ -3164,14 +3163,12 @@ namespace Kernel
if (vaddr + size > USERSPACE_END)
goto unauthorized_access;
if (vaddr == 0)
return {};
if (vaddr >= thread.userspace_stack_bottom() && vaddr + size <= thread.userspace_stack_top())
return {};
for (const auto* thread : m_threads)
if (vaddr >= thread->userspace_stack_bottom() && vaddr + size <= thread->userspace_stack_top())
return {};
// FIXME: should we allow cross mapping access?
for (auto& mapped_region : m_mapped_regions)
for (const auto& mapped_region : m_mapped_regions)
{
if (!mapped_region->contains_fully(vaddr, size))
continue;