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Kernel: Handle allocation failure in ProcFS and friends

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There were many places in which allocation failure was noticed but
ignored.
This commit is contained in:
sin-ack 2021-08-14 12:39:51 +00:00 • committed by Andreas Kling
parent 134dbe2607
commit 748938ea59
8 changed files with 196 additions and 92 deletions
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6
Kernel/Process.h
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@ -551,7 +551,7 @@ private:
public:
// ^ProcFSExposedComponent stats
virtual InodeIndex component_index() const override;
virtual NonnullRefPtr<Inode> to_inode(const ProcFS& procfs_instance) const override;
virtual KResultOr<NonnullRefPtr<Inode>> to_inode(const ProcFS& procfs_instance) const override;
virtual KResult traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
virtual mode_t required_mode() const override { return 0555; }
virtual uid_t owner_user() const override { return uid(); }
@ -567,10 +567,10 @@ public:
mode_t binary_link_required_mode() const;
KResultOr<size_t> procfs_get_thread_stack(ThreadID thread_id, KBufferBuilder& builder) const;
KResult traverse_stacks_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const;
RefPtr<Inode> lookup_stacks_directory(const ProcFS&, StringView name) const;
KResultOr<NonnullRefPtr<Inode>> lookup_stacks_directory(const ProcFS&, StringView name) const;
KResultOr<size_t> procfs_get_file_description_link(unsigned fd, KBufferBuilder& builder) const;
KResult traverse_file_descriptions_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const;
RefPtr<Inode> lookup_file_descriptions_directory(const ProcFS&, StringView name) const;
KResultOr<NonnullRefPtr<Inode>> lookup_file_descriptions_directory(const ProcFS&, StringView name) const;
private:
inline PerformanceEventBuffer* current_perf_events_buffer()