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Kernel: Fix /proc/<pid>/exe permissions

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Bananymous
2025-08-29 01:40:56 +03:00
parent f15f88ebd6
commit 30215963b2
4 changed files with 62 additions and 10 deletions
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29
kernel/include/kernel/FS/ProcFS/Inode.h
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@@ -57,6 +57,35 @@ namespace Kernel
size_t (Process::*m_callback)(off_t, BAN::ByteSpan) const;
};
class ProcSymlinkProcessInode final : public TmpInode
{
public:
static BAN::ErrorOr<BAN::RefPtr<ProcSymlinkProcessInode>> create_new(Process& process, BAN::ErrorOr<BAN::String> (Process::*callback)() const, TmpFileSystem&, mode_t);
~ProcSymlinkProcessInode() = default;
virtual uid_t uid() const override { return m_process.credentials().ruid(); }
virtual gid_t gid() const override { return m_process.credentials().rgid(); }
protected:
virtual BAN::ErrorOr<BAN::String> link_target_impl() override;
// You may not write here and this is always non blocking
virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override { return BAN::Error::from_errno(EINVAL); }
virtual BAN::ErrorOr<void> truncate_impl(size_t) override { return BAN::Error::from_errno(EINVAL); }
virtual bool can_read_impl() const override { return false; }
virtual bool can_write_impl() const override { return false; }
virtual bool has_error_impl() const override { return false; }
virtual bool has_hungup_impl() const override { return false; }
private:
ProcSymlinkProcessInode(Process& process, BAN::ErrorOr<BAN::String> (Process::*)() const, TmpFileSystem&, const TmpInodeInfo&);
private:
Process& m_process;
BAN::ErrorOr<BAN::String> (Process::*m_callback)() const;
};
class ProcROInode final : public TmpInode
{
public:

1
kernel/include/kernel/Process.h
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@@ -225,6 +225,7 @@ namespace Kernel
size_t proc_meminfo(off_t offset, BAN::ByteSpan) const;
size_t proc_cmdline(off_t offset, BAN::ByteSpan) const;
size_t proc_environ(off_t offset, BAN::ByteSpan) const;
BAN::ErrorOr<BAN::String> proc_executable() const;
BAN::StringView executable() const { return m_executable; }