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Revert "Kernel: Use an ArmedScopeGuard to revert changes after failed mmap"

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This reverts commit 790d620b39.
This commit is contained in:
Brian Gianforcaro 2022-03-13 04:00:51 +00:00
parent 3b39e16e8f
commit 03342876b8
Notes: sideshowbarker 2024-07-17 17:30:34 +09:00 
Author: https://github.com/bgianfo
Commit: https://github.com/SerenityOS/serenity/commit/03342876b8
Pull-request: https://github.com/SerenityOS/serenity/pull/13020
Issue: https://github.com/SerenityOS/serenity/issues/12970
1 changed files with 1 additions and 12 deletions
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13
Kernel/Syscalls/mmap.cpp
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@ -5,7 +5,6 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/kmalloc.h>
#include <Kernel/Arch/SmapDisabler.h>
#include <Kernel/Arch/x86/MSR.h>
#include <Kernel/Arch/x86/SafeMem.h>
@ -185,16 +184,8 @@ ErrorOr<FlatPtr> Process::sys$mmap(Userspace<const Syscall::SC_mmap_params*> use
return EINVAL;
Memory::Region* region = nullptr;
Memory::VirtualRange range { {}, 0 };
ArmedScopeGuard scope_guard = [&] {
if (region)
address_space().deallocate_region(*region);
else if (range.is_valid())
address_space().page_directory().range_allocator().deallocate(range);
};
range = TRY([&]() -> ErrorOr<Memory::VirtualRange> {
auto range = TRY([&]() -> ErrorOr<Memory::VirtualRange> {
if (map_randomized)
return address_space().page_directory().range_allocator().try_allocate_randomized(rounded_size, alignment);
@ -257,8 +248,6 @@ ErrorOr<FlatPtr> Process::sys$mmap(Userspace<const Syscall::SC_mmap_params*> use
PerformanceManager::add_mmap_perf_event(*this, *region);
scope_guard.disarm();
return region->vaddr().get();
}