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Kernel: Make PTYMultiplexer::open API OOM safe

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This commit is contained in:
Brian Gianforcaro 2021-05-14 04:15:05 -07:00 • committed by Andreas Kling
parent f3f5a225b9
commit 77868abe6a
1 changed files with 4 additions and 2 deletions
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6
Kernel/TTY/PTYMultiplexer.cpp
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@ -40,9 +40,11 @@ KResultOr<NonnullRefPtr<FileDescription>> PTYMultiplexer::open(int options)
if (m_freelist.is_empty()) if (m_freelist.is_empty())
return EBUSY; return EBUSY;
auto master_index = m_freelist.take_last(); auto master_index = m_freelist.take_last();
auto master = adopt_ref(*new MasterPTY(master_index)); auto master = adopt_ref_if_nonnull(new MasterPTY(master_index));
if (!master)
return ENOMEM;
dbgln_if(PTMX_DEBUG, "PTYMultiplexer::open: Vending master {}", master->index()); dbgln_if(PTMX_DEBUG, "PTYMultiplexer::open: Vending master {}", master->index());
auto description = FileDescription::create(move(master)); auto description = FileDescription::create(*master);
if (!description.is_error()) { if (!description.is_error()) {
description.value()->set_rw_mode(options); description.value()->set_rw_mode(options);
description.value()->set_file_flags(options); description.value()->set_file_flags(options);