diff options
Diffstat (limited to 'Kernel')
-rw-r--r-- | Kernel/Process.cpp | 40 | ||||
-rw-r--r-- | Kernel/Process.h | 114 | ||||
-rw-r--r-- | Kernel/Syscalls/disown.cpp | 2 | ||||
-rw-r--r-- | Kernel/Syscalls/execve.cpp | 20 | ||||
-rw-r--r-- | Kernel/Syscalls/exit.cpp | 4 | ||||
-rw-r--r-- | Kernel/Syscalls/fork.cpp | 18 | ||||
-rw-r--r-- | Kernel/Syscalls/getuid.cpp | 4 | ||||
-rw-r--r-- | Kernel/Syscalls/pledge.cpp | 12 | ||||
-rw-r--r-- | Kernel/Syscalls/process.cpp | 2 | ||||
-rw-r--r-- | Kernel/Syscalls/setpgid.cpp | 2 | ||||
-rw-r--r-- | Kernel/Syscalls/setuid.cpp | 38 | ||||
-rw-r--r-- | Kernel/Syscalls/umask.cpp | 4 |
12 files changed, 131 insertions, 129 deletions
diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp index 26cd0c4955..94ca8f0c8a 100644 --- a/Kernel/Process.cpp +++ b/Kernel/Process.cpp @@ -216,14 +216,14 @@ RefPtr<Process> Process::create_kernel_process(RefPtr<Thread>& first_thread, Str void Process::protect_data() { m_protected_data_refs.unref([&]() { - MM.set_page_writable_direct(VirtualAddress { this }, false); + MM.set_page_writable_direct(VirtualAddress { &this->m_protected_values }, false); }); } void Process::unprotect_data() { m_protected_data_refs.ref([&]() { - MM.set_page_writable_direct(VirtualAddress { this }, true); + MM.set_page_writable_direct(VirtualAddress { &this->m_protected_values }, true); }); } @@ -249,14 +249,14 @@ Process::Process(const String& name, uid_t uid, gid_t gid, ProcessID ppid, bool // Ensure that we protect the process data when exiting the constructor. ProtectedDataMutationScope scope { *this }; - m_pid = allocate_pid(); - m_ppid = ppid; - m_uid = uid; - m_gid = gid; - m_euid = uid; - m_egid = gid; - m_suid = uid; - m_sgid = gid; + m_protected_values.pid = allocate_pid(); + m_protected_values.ppid = ppid; + m_protected_values.uid = uid; + m_protected_values.gid = gid; + m_protected_values.euid = uid; + m_protected_values.egid = gid; + m_protected_values.suid = uid; + m_protected_values.sgid = gid; dbgln_if(PROCESS_DEBUG, "Created new process {}({})", m_name, this->pid().value()); } @@ -386,7 +386,7 @@ void Process::crash(int signal, FlatPtr ip, bool out_of_memory) } { ProtectedDataMutationScope scope { *this }; - m_termination_signal = signal; + m_protected_values.termination_signal = signal; } set_dump_core(!out_of_memory); address_space().dump_regions(); @@ -482,11 +482,11 @@ siginfo_t Process::wait_info() siginfo.si_pid = pid().value(); siginfo.si_uid = uid(); - if (m_termination_signal) { - siginfo.si_status = m_termination_signal; + if (m_protected_values.termination_signal) { + siginfo.si_status = m_protected_values.termination_signal; siginfo.si_code = CLD_KILLED; } else { - siginfo.si_status = m_termination_status; + siginfo.si_status = m_protected_values.termination_status; siginfo.si_code = CLD_EXITED; } return siginfo; @@ -690,8 +690,8 @@ void Process::terminate_due_to_signal(u8 signal) dbgln("Terminating {} due to signal {}", *this, signal); { ProtectedDataMutationScope scope { *this }; - m_termination_status = 0; - m_termination_signal = signal; + m_protected_values.termination_status = 0; + m_protected_values.termination_signal = signal; } die(); } @@ -832,7 +832,7 @@ void Process::delete_perf_events_buffer() bool Process::remove_thread(Thread& thread) { ProtectedDataMutationScope scope { *this }; - auto thread_cnt_before = m_thread_count.fetch_sub(1, AK::MemoryOrder::memory_order_acq_rel); + auto thread_cnt_before = m_protected_values.thread_count.fetch_sub(1, AK::MemoryOrder::memory_order_acq_rel); VERIFY(thread_cnt_before != 0); thread_list().with([&](auto& thread_list) { thread_list.remove(thread); @@ -843,7 +843,7 @@ bool Process::remove_thread(Thread& thread) bool Process::add_thread(Thread& thread) { ProtectedDataMutationScope scope { *this }; - bool is_first = m_thread_count.fetch_add(1, AK::MemoryOrder::memory_order_relaxed) == 0; + bool is_first = m_protected_values.thread_count.fetch_add(1, AK::MemoryOrder::memory_order_relaxed) == 0; thread_list().with([&](auto& thread_list) { thread_list.append(thread); }); @@ -852,10 +852,10 @@ bool Process::add_thread(Thread& thread) void Process::set_dumpable(bool dumpable) { - if (dumpable == m_dumpable) + if (dumpable == m_protected_values.dumpable) return; ProtectedDataMutationScope scope { *this }; - m_dumpable = dumpable; + m_protected_values.dumpable = dumpable; } KResult Process::set_coredump_property(NonnullOwnPtr<KString> key, NonnullOwnPtr<KString> value) diff --git a/Kernel/Process.h b/Kernel/Process.h index 26dcc49d11..bea511b106 100644 --- a/Kernel/Process.h +++ b/Kernel/Process.h @@ -11,6 +11,7 @@ #include <AK/IntrusiveList.h> #include <AK/IntrusiveListRelaxedConst.h> #include <AK/NonnullRefPtrVector.h> +#include <AK/OwnPtr.h> #include <AK/String.h> #include <AK/Userspace.h> #include <AK/WeakPtr.h> @@ -82,45 +83,36 @@ typedef HashMap<FlatPtr, RefPtr<FutexQueue>> FutexQueues; struct LoadResult; -class ProtectedProcessBase { -protected: - ProcessID m_pid { 0 }; - ProcessID m_ppid { 0 }; - SessionID m_sid { 0 }; - uid_t m_euid { 0 }; - gid_t m_egid { 0 }; - uid_t m_uid { 0 }; - gid_t m_gid { 0 }; - uid_t m_suid { 0 }; - gid_t m_sgid { 0 }; - Vector<gid_t> m_extra_gids; - bool m_dumpable { false }; - Atomic<bool> m_has_promises { false }; - Atomic<u32> m_promises { 0 }; - Atomic<bool> m_has_execpromises { false }; - Atomic<u32> m_execpromises { 0 }; - mode_t m_umask { 022 }; - VirtualAddress m_signal_trampoline; - Atomic<u32> m_thread_count { 0 }; - u8 m_termination_status { 0 }; - u8 m_termination_signal { 0 }; -}; - -class ProcessBase : public ProtectedProcessBase { -protected: - // Without the alignas specifier here the compiler places this class into - // the parent class' padding which then causes the members for the RefCounted - // class to be placed within the first page of the Process class. - alignas(ProtectedProcessBase) u8 m_process_base_padding[PAGE_SIZE - sizeof(ProtectedProcessBase)]; -}; - -static_assert(sizeof(ProcessBase) == PAGE_SIZE); - class Process - : public ProcessBase - , public RefCounted<Process> + : public RefCounted<Process> , public Weakable<Process> { +private: + class ProtectedValues { + public: + ProcessID pid { 0 }; + ProcessID ppid { 0 }; + SessionID sid { 0 }; + uid_t euid { 0 }; + gid_t egid { 0 }; + uid_t uid { 0 }; + gid_t gid { 0 }; + uid_t suid { 0 }; + gid_t sgid { 0 }; + Vector<gid_t> extra_gids; + bool dumpable { false }; + Atomic<bool> has_promises { false }; + Atomic<u32> promises { 0 }; + Atomic<bool> has_execpromises { false }; + Atomic<u32> execpromises { 0 }; + mode_t umask { 022 }; + VirtualAddress signal_trampoline; + Atomic<u32> thread_count { 0 }; + u8 termination_status { 0 }; + u8 termination_signal { 0 }; + }; + +public: AK_MAKE_NONCOPYABLE(Process); AK_MAKE_NONMOVABLE(Process); @@ -205,24 +197,24 @@ public: static SessionID get_sid_from_pgid(ProcessGroupID pgid); const String& name() const { return m_name; } - ProcessID pid() const { return m_pid; } - SessionID sid() const { return m_sid; } - bool is_session_leader() const { return m_sid.value() == m_pid.value(); } + ProcessID pid() const { return m_protected_values.pid; } + SessionID sid() const { return m_protected_values.sid; } + bool is_session_leader() const { return sid().value() == pid().value(); } ProcessGroupID pgid() const { return m_pg ? m_pg->pgid() : 0; } - bool is_group_leader() const { return pgid().value() == m_pid.value(); } - const Vector<gid_t>& extra_gids() const { return m_extra_gids; } - uid_t euid() const { return m_euid; } - gid_t egid() const { return m_egid; } - uid_t uid() const { return m_uid; } - gid_t gid() const { return m_gid; } - uid_t suid() const { return m_suid; } - gid_t sgid() const { return m_sgid; } - ProcessID ppid() const { return m_ppid; } - - bool is_dumpable() const { return m_dumpable; } + bool is_group_leader() const { return pgid().value() == pid().value(); } + const Vector<gid_t>& extra_gids() const { return m_protected_values.extra_gids; } + uid_t euid() const { return m_protected_values.euid; } + gid_t egid() const { return m_protected_values.egid; } + uid_t uid() const { return m_protected_values.uid; } + gid_t gid() const { return m_protected_values.gid; } + uid_t suid() const { return m_protected_values.suid; } + gid_t sgid() const { return m_protected_values.sgid; } + ProcessID ppid() const { return m_protected_values.ppid; } + + bool is_dumpable() const { return m_protected_values.dumpable; } void set_dumpable(bool); - mode_t umask() const { return m_umask; } + mode_t umask() const { return m_protected_values.umask; } bool in_group(gid_t) const; @@ -448,11 +440,11 @@ public: void terminate_due_to_signal(u8 signal); KResult send_signal(u8 signal, Process* sender); - u8 termination_signal() const { return m_termination_signal; } + u8 termination_signal() const { return m_protected_values.termination_signal; } u16 thread_count() const { - return m_thread_count.load(AK::MemoryOrder::memory_order_relaxed); + return m_protected_values.thread_count.load(AK::MemoryOrder::memory_order_relaxed); } Mutex& big_lock() { return m_big_lock; } @@ -462,8 +454,8 @@ public: Custody& root_directory_relative_to_global_root(); void set_root_directory(const Custody&); - bool has_promises() const { return m_has_promises; } - bool has_promised(Pledge pledge) const { return m_promises & (1u << (u32)pledge); } + bool has_promises() const { return m_protected_values.has_promises; } + bool has_promised(Pledge pledge) const { return m_protected_values.promises & (1u << (u32)pledge); } VeilState veil_state() const { @@ -509,7 +501,7 @@ public: Memory::AddressSpace& address_space() { return *m_space; } Memory::AddressSpace const& address_space() const { return *m_space; } - VirtualAddress signal_trampoline() const { return m_signal_trampoline; } + VirtualAddress signal_trampoline() const { return m_protected_values.signal_trampoline; } private: friend class MemoryManager; @@ -763,10 +755,20 @@ private: NonnullRefPtrVector<Thread> m_threads_for_coredump; + static_assert(sizeof(ProtectedValues) < (PAGE_SIZE)); + alignas(4096) ProtectedValues m_protected_values; + u8 m_protected_values_padding[PAGE_SIZE - sizeof(ProtectedValues)]; + public: using List = IntrusiveListRelaxedConst<Process, RawPtr<Process>, &Process::m_list_node>; }; +// Note: Process object should be 2 pages of 4096 bytes each. +// It's not expected that the Process object will expand further because the first +// page is used for all unprotected values (which should be plenty of space for them). +// The second page is being used exclusively for write-protected values. +static_assert(sizeof(Process) == (PAGE_SIZE * 2)); + extern RecursiveSpinLock g_profiling_lock; ProtectedValue<Process::List>& processes(); diff --git a/Kernel/Syscalls/disown.cpp b/Kernel/Syscalls/disown.cpp index 4e5cdbc8dc..09ac972dc3 100644 --- a/Kernel/Syscalls/disown.cpp +++ b/Kernel/Syscalls/disown.cpp @@ -18,7 +18,7 @@ KResultOr<FlatPtr> Process::sys$disown(ProcessID pid) if (process->ppid() != this->pid()) return ECHILD; ProtectedDataMutationScope scope(*process); - process->m_ppid = 0; + process->m_protected_values.ppid = 0; process->disowned_by_waiter(*this); return 0; } diff --git a/Kernel/Syscalls/execve.cpp b/Kernel/Syscalls/execve.cpp index 4b55c7f2e7..eef9d081de 100644 --- a/Kernel/Syscalls/execve.cpp +++ b/Kernel/Syscalls/execve.cpp @@ -540,14 +540,14 @@ KResult Process::do_exec(NonnullRefPtr<FileDescription> main_program_description if (main_program_metadata.is_setuid()) { executable_is_setid = true; ProtectedDataMutationScope scope { *this }; - m_euid = main_program_metadata.uid; - m_suid = main_program_metadata.uid; + m_protected_values.euid = main_program_metadata.uid; + m_protected_values.suid = main_program_metadata.uid; } if (main_program_metadata.is_setgid()) { executable_is_setid = true; ProtectedDataMutationScope scope { *this }; - m_egid = main_program_metadata.gid; - m_sgid = main_program_metadata.gid; + m_protected_values.egid = main_program_metadata.gid; + m_protected_values.sgid = main_program_metadata.gid; } } @@ -641,16 +641,16 @@ KResult Process::do_exec(NonnullRefPtr<FileDescription> main_program_description { ProtectedDataMutationScope scope { *this }; - m_promises = m_execpromises.load(); - m_has_promises = m_has_execpromises.load(); + m_protected_values.promises = m_protected_values.execpromises.load(); + m_protected_values.has_promises = m_protected_values.has_execpromises.load(); - m_execpromises = 0; - m_has_execpromises = false; + m_protected_values.execpromises = 0; + m_protected_values.has_execpromises = false; - m_signal_trampoline = signal_trampoline_region.value()->vaddr(); + m_protected_values.signal_trampoline = signal_trampoline_region.value()->vaddr(); // FIXME: PID/TID ISSUE - m_pid = new_main_thread->tid().value(); + m_protected_values.pid = new_main_thread->tid().value(); } auto tsr_result = new_main_thread->make_thread_specific_region({}); diff --git a/Kernel/Syscalls/exit.cpp b/Kernel/Syscalls/exit.cpp index b4c2d80e54..df046179d5 100644 --- a/Kernel/Syscalls/exit.cpp +++ b/Kernel/Syscalls/exit.cpp @@ -20,8 +20,8 @@ void Process::sys$exit(int status) { ProtectedDataMutationScope scope { *this }; - m_termination_status = status; - m_termination_signal = 0; + m_protected_values.termination_status = status; + m_protected_values.termination_signal = 0; } auto* current_thread = Thread::current(); diff --git a/Kernel/Syscalls/fork.cpp b/Kernel/Syscalls/fork.cpp index cab53f8a19..867575e4a0 100644 --- a/Kernel/Syscalls/fork.cpp +++ b/Kernel/Syscalls/fork.cpp @@ -30,15 +30,15 @@ KResultOr<FlatPtr> Process::sys$fork(RegisterState& regs) { ProtectedDataMutationScope scope { *child }; - child->m_promises = m_promises.load(); - child->m_execpromises = m_execpromises.load(); - child->m_has_promises = m_has_promises.load(); - child->m_has_execpromises = m_has_execpromises.load(); - child->m_sid = m_sid; - child->m_extra_gids = m_extra_gids; - child->m_umask = m_umask; - child->m_signal_trampoline = m_signal_trampoline; - child->m_dumpable = m_dumpable; + child->m_protected_values.promises = m_protected_values.promises.load(); + child->m_protected_values.execpromises = m_protected_values.execpromises.load(); + child->m_protected_values.has_promises = m_protected_values.has_promises.load(); + child->m_protected_values.has_execpromises = m_protected_values.has_execpromises.load(); + child->m_protected_values.sid = m_protected_values.sid; + child->m_protected_values.extra_gids = m_protected_values.extra_gids; + child->m_protected_values.umask = m_protected_values.umask; + child->m_protected_values.signal_trampoline = m_protected_values.signal_trampoline; + child->m_protected_values.dumpable = m_protected_values.dumpable; } dbgln_if(FORK_DEBUG, "fork: child={}", child); diff --git a/Kernel/Syscalls/getuid.cpp b/Kernel/Syscalls/getuid.cpp index b94711e3dd..24a578b063 100644 --- a/Kernel/Syscalls/getuid.cpp +++ b/Kernel/Syscalls/getuid.cpp @@ -40,7 +40,7 @@ KResultOr<FlatPtr> Process::sys$getresuid(Userspace<uid_t*> ruid, Userspace<uid_ { VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this) REQUIRE_PROMISE(stdio); - if (!copy_to_user(ruid, &m_uid) || !copy_to_user(euid, &m_euid) || !copy_to_user(suid, &m_suid)) + if (!copy_to_user(ruid, &m_protected_values.uid) || !copy_to_user(euid, &m_protected_values.euid) || !copy_to_user(suid, &m_protected_values.suid)) return EFAULT; return 0; } @@ -49,7 +49,7 @@ KResultOr<FlatPtr> Process::sys$getresgid(Userspace<gid_t*> rgid, Userspace<gid_ { VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this) REQUIRE_PROMISE(stdio); - if (!copy_to_user(rgid, &m_gid) || !copy_to_user(egid, &m_egid) || !copy_to_user(sgid, &m_sgid)) + if (!copy_to_user(rgid, &m_protected_values.gid) || !copy_to_user(egid, &m_protected_values.egid) || !copy_to_user(sgid, &m_protected_values.sgid)) return EFAULT; return 0; } diff --git a/Kernel/Syscalls/pledge.cpp b/Kernel/Syscalls/pledge.cpp index f021f718b1..5a24406272 100644 --- a/Kernel/Syscalls/pledge.cpp +++ b/Kernel/Syscalls/pledge.cpp @@ -56,7 +56,7 @@ KResultOr<FlatPtr> Process::sys$pledge(Userspace<const Syscall::SC_pledge_params if (promises) { if (!parse_pledge(promises->view(), new_promises)) return EINVAL; - if (m_has_promises && (new_promises & ~m_promises)) + if (m_protected_values.has_promises && (new_promises & ~m_protected_values.promises)) return EPERM; } @@ -64,7 +64,7 @@ KResultOr<FlatPtr> Process::sys$pledge(Userspace<const Syscall::SC_pledge_params if (execpromises) { if (!parse_pledge(execpromises->view(), new_execpromises)) return EINVAL; - if (m_has_execpromises && (new_execpromises & ~m_execpromises)) + if (m_protected_values.has_execpromises && (new_execpromises & ~m_protected_values.execpromises)) return EPERM; } @@ -74,13 +74,13 @@ KResultOr<FlatPtr> Process::sys$pledge(Userspace<const Syscall::SC_pledge_params // leave the caller in an unexpected state. if (promises) { - m_promises = new_promises; - m_has_promises = true; + m_protected_values.has_promises = true; + m_protected_values.promises = new_promises; } if (execpromises) { - m_execpromises = new_execpromises; - m_has_execpromises = true; + m_protected_values.has_execpromises = true; + m_protected_values.execpromises = new_execpromises; } return 0; diff --git a/Kernel/Syscalls/process.cpp b/Kernel/Syscalls/process.cpp index ac5414d41c..3a0c7acb78 100644 --- a/Kernel/Syscalls/process.cpp +++ b/Kernel/Syscalls/process.cpp @@ -20,7 +20,7 @@ KResultOr<FlatPtr> Process::sys$getppid() { VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this) REQUIRE_PROMISE(stdio); - return m_ppid.value(); + return m_protected_values.ppid.value(); } KResultOr<FlatPtr> Process::sys$get_process_name(Userspace<char*> buffer, size_t buffer_size) diff --git a/Kernel/Syscalls/setpgid.cpp b/Kernel/Syscalls/setpgid.cpp index f9832b9f58..7800c5b3a9 100644 --- a/Kernel/Syscalls/setpgid.cpp +++ b/Kernel/Syscalls/setpgid.cpp @@ -40,7 +40,7 @@ KResultOr<FlatPtr> Process::sys$setsid() m_pg = ProcessGroup::create(ProcessGroupID(pid().value())); m_tty = nullptr; ProtectedDataMutationScope scope { *this }; - m_sid = pid().value(); + m_protected_values.sid = pid().value(); return sid().value(); } diff --git a/Kernel/Syscalls/setuid.cpp b/Kernel/Syscalls/setuid.cpp index 0a9e7e607c..a16c0eeedb 100644 --- a/Kernel/Syscalls/setuid.cpp +++ b/Kernel/Syscalls/setuid.cpp @@ -21,7 +21,7 @@ KResultOr<FlatPtr> Process::sys$seteuid(uid_t new_euid) ProtectedDataMutationScope scope { *this }; - m_euid = new_euid; + m_protected_values.euid = new_euid; return 0; } @@ -37,7 +37,7 @@ KResultOr<FlatPtr> Process::sys$setegid(gid_t new_egid) set_dumpable(false); ProtectedDataMutationScope scope { *this }; - m_egid = new_egid; + m_protected_values.egid = new_egid; return 0; } @@ -53,9 +53,9 @@ KResultOr<FlatPtr> Process::sys$setuid(uid_t new_uid) set_dumpable(false); ProtectedDataMutationScope scope { *this }; - m_uid = new_uid; - m_euid = new_uid; - m_suid = new_uid; + m_protected_values.uid = new_uid; + m_protected_values.euid = new_uid; + m_protected_values.suid = new_uid; return 0; } @@ -71,9 +71,9 @@ KResultOr<FlatPtr> Process::sys$setgid(gid_t new_gid) set_dumpable(false); ProtectedDataMutationScope scope { *this }; - m_gid = new_gid; - m_egid = new_gid; - m_sgid = new_gid; + m_protected_values.gid = new_gid; + m_protected_values.egid = new_gid; + m_protected_values.sgid = new_gid; return 0; } @@ -98,8 +98,8 @@ KResultOr<FlatPtr> Process::sys$setreuid(uid_t new_ruid, uid_t new_euid) set_dumpable(false); ProtectedDataMutationScope scope { *this }; - m_uid = new_ruid; - m_euid = new_euid; + m_protected_values.uid = new_ruid; + m_protected_values.euid = new_euid; return 0; } @@ -123,9 +123,9 @@ KResultOr<FlatPtr> Process::sys$setresuid(uid_t new_ruid, uid_t new_euid, uid_t set_dumpable(false); ProtectedDataMutationScope scope { *this }; - m_uid = new_ruid; - m_euid = new_euid; - m_suid = new_suid; + m_protected_values.uid = new_ruid; + m_protected_values.euid = new_euid; + m_protected_values.suid = new_suid; return 0; } @@ -149,9 +149,9 @@ KResultOr<FlatPtr> Process::sys$setresgid(gid_t new_rgid, gid_t new_egid, gid_t set_dumpable(false); ProtectedDataMutationScope scope { *this }; - m_gid = new_rgid; - m_egid = new_egid; - m_sgid = new_sgid; + m_protected_values.gid = new_rgid; + m_protected_values.egid = new_egid; + m_protected_values.sgid = new_sgid; return 0; } @@ -164,7 +164,7 @@ KResultOr<FlatPtr> Process::sys$setgroups(size_t count, Userspace<const gid_t*> if (!count) { ProtectedDataMutationScope scope { *this }; - m_extra_gids.clear(); + m_protected_values.extra_gids.clear(); return 0; } @@ -181,13 +181,13 @@ KResultOr<FlatPtr> Process::sys$setgroups(size_t count, Userspace<const gid_t*> } ProtectedDataMutationScope scope { *this }; - if (!m_extra_gids.try_resize(unique_extra_gids.size())) + if (!m_protected_values.extra_gids.try_resize(unique_extra_gids.size())) return ENOMEM; size_t i = 0; for (auto& extra_gid : unique_extra_gids) { if (extra_gid == gid()) continue; - m_extra_gids[i++] = extra_gid; + m_protected_values.extra_gids[i++] = extra_gid; } return 0; } diff --git a/Kernel/Syscalls/umask.cpp b/Kernel/Syscalls/umask.cpp index 16819f0215..e019fb0344 100644 --- a/Kernel/Syscalls/umask.cpp +++ b/Kernel/Syscalls/umask.cpp @@ -12,9 +12,9 @@ KResultOr<FlatPtr> Process::sys$umask(mode_t mask) { VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this) REQUIRE_PROMISE(stdio); - auto old_mask = m_umask; + auto old_mask = m_protected_values.umask; ProtectedDataMutationScope scope { *this }; - m_umask = mask & 0777; + m_protected_values.umask = mask & 0777; return old_mask; } |