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Kernel: Use Userspace<T> for the recvfrom syscall, and Socket implementation

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This fixes a bunch of unchecked kernel reads and writes, seems like they
would might exploitable :). Write of sockaddr_in size to any address you
please...
This commit is contained in:
Brian Gianforcaro 2020-08-18 00:25:23 -07:00 • committed by Andreas Kling
parent 9f9b05ba0f
commit 8e97de2df9
9 changed files with 43 additions and 30 deletions
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6
Kernel/Net/IPv4Socket.h
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@ -59,7 +59,7 @@ public:
virtual bool can_read(const FileDescription&, size_t) const override;
virtual bool can_write(const FileDescription&, size_t) const override;
virtual KResultOr<size_t> sendto(FileDescription&, const void*, size_t, int, Userspace<const sockaddr*>, socklen_t) override;
virtual KResultOr<size_t> recvfrom(FileDescription&, void*, size_t, int flags, sockaddr*, socklen_t*) override;
virtual KResultOr<size_t> recvfrom(FileDescription&, void*, size_t, int flags, Userspace<sockaddr*>, Userspace<socklen_t*>) override;
virtual KResult setsockopt(int level, int option, Userspace<const void*>, socklen_t) override;
virtual KResult getsockopt(FileDescription&, int level, int option, Userspace<void*>, Userspace<socklen_t*>) override;
@ -110,8 +110,8 @@ protected:
private:
virtual bool is_ipv4() const override { return true; }
KResultOr<size_t> receive_byte_buffered(FileDescription&, void* buffer, size_t buffer_length, int flags, sockaddr*, socklen_t*);
KResultOr<size_t> receive_packet_buffered(FileDescription&, void* buffer, size_t buffer_length, int flags, sockaddr*, socklen_t*);
KResultOr<size_t> receive_byte_buffered(FileDescription&, void* buffer, size_t buffer_length, int flags, Userspace<sockaddr*>, Userspace<socklen_t*>);
KResultOr<size_t> receive_packet_buffered(FileDescription&, void* buffer, size_t buffer_length, int flags, Userspace<sockaddr*>, Userspace<socklen_t*>);
IPv4Address m_local_address;
IPv4Address m_peer_address;