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Kernel: Unbreak symbolication yet another time.

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This commit is contained in:
Andreas Kling
2019-01-27 10:17:56 +01:00
parent 6d351bb326
commit 0e73aa36c8
3 changed files with 19 additions and 8 deletions
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23
Kernel/Process.cpp
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@@ -1597,14 +1597,19 @@ void sleep(dword ticks)
sched_yield();
}
static bool is_inside_kernel_code(LinearAddress laddr)
{
// FIXME: What if we're indexing into the ksym with the highest address though?
return laddr.get() >= ksym_lowest_address && laddr.get() <= ksym_highest_address;
}
bool Process::validate_read_from_kernel(LinearAddress laddr) const
{
// We check extra carefully here since the first 4MB of the address space is identity-mapped.
// This code allows access outside of the known used address ranges to get caught.
InterruptDisabler disabler;
// FIXME: What if we're indexing into the ksym with the highest address though?
if (laddr.get() >= ksym_lowest_address && laddr.get() <= ksym_highest_address)
if (is_inside_kernel_code(laddr))
return true;
if (is_kmalloc_address(laddr.as_ptr()))
return true;
@@ -1613,8 +1618,12 @@ bool Process::validate_read_from_kernel(LinearAddress laddr) const
bool Process::validate_read(const void* address, size_t size) const
{
if (isRing0())
return true;
if (isRing0()) {
if (is_inside_kernel_code(LinearAddress((dword)address)))
return true;
if (is_kmalloc_address(address))
return true;
}
ASSERT(size);
if (!size)
return false;
@@ -1629,8 +1638,10 @@ bool Process::validate_read(const void* address, size_t size) const
bool Process::validate_write(void* address, size_t size) const
{
if (isRing0())
return true;
if (isRing0()) {
if (is_kmalloc_address(address))
return true;
}
ASSERT(size);
if (!size)
return false;