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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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12
Kernel/ProcessExposed.h
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@ -69,7 +69,7 @@ public:
StringView name() const { return m_name->view(); }
virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, FileDescription*) const { VERIFY_NOT_REACHED(); }
virtual KResult traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const { VERIFY_NOT_REACHED(); }
virtual RefPtr<ProcFSExposedComponent> lookup(StringView) { VERIFY_NOT_REACHED(); };
virtual KResultOr<NonnullRefPtr<ProcFSExposedComponent>> lookup(StringView) { VERIFY_NOT_REACHED(); };
virtual KResultOr<size_t> write_bytes(off_t, size_t, const UserOrKernelBuffer&, FileDescription*) { return KResult(EROFS); }
virtual size_t size() const { return 0; }
@ -84,7 +84,7 @@ public:
return KSuccess;
}
virtual NonnullRefPtr<Inode> to_inode(const ProcFS& procfs_instance) const;
virtual KResultOr<NonnullRefPtr<Inode>> to_inode(const ProcFS& procfs_instance) const;
virtual InodeIndex component_index() const { return m_component_index; }
@ -106,7 +106,7 @@ class ProcFSExposedDirectory
public:
virtual KResult traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
virtual RefPtr<ProcFSExposedComponent> lookup(StringView name) override;
virtual KResultOr<NonnullRefPtr<ProcFSExposedComponent>> lookup(StringView name) override;
void add_component(const ProcFSExposedComponent&);
virtual void prepare_for_deletion() override
@ -117,7 +117,7 @@ public:
}
virtual mode_t required_mode() const override { return 0555; }
virtual NonnullRefPtr<Inode> to_inode(const ProcFS& procfs_instance) const override final;
virtual KResultOr<NonnullRefPtr<Inode>> to_inode(const ProcFS& procfs_instance) const override final;
protected:
explicit ProcFSExposedDirectory(StringView name);
@ -128,7 +128,7 @@ protected:
class ProcFSExposedLink : public ProcFSExposedComponent {
public:
virtual NonnullRefPtr<Inode> to_inode(const ProcFS& procfs_instance) const override final;
virtual KResultOr<NonnullRefPtr<Inode>> to_inode(const ProcFS& procfs_instance) const override final;
virtual KResultOr<size_t> read_bytes(off_t offset, size_t count, UserOrKernelBuffer& buffer, FileDescription* description) const override;
@ -142,7 +142,7 @@ class ProcFSRootDirectory final : public ProcFSExposedDirectory {
friend class ProcFSComponentRegistry;
public:
virtual RefPtr<ProcFSExposedComponent> lookup(StringView name) override;
virtual KResultOr<NonnullRefPtr<ProcFSExposedComponent>> lookup(StringView name) override;
static NonnullRefPtr<ProcFSRootDirectory> must_create();
virtual ~ProcFSRootDirectory();