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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /security/sandbox/linux/SandboxFilterUtil.cpp | |
parent | Initial commit. (diff) | |
download | firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'security/sandbox/linux/SandboxFilterUtil.cpp')
-rw-r--r-- | security/sandbox/linux/SandboxFilterUtil.cpp | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/security/sandbox/linux/SandboxFilterUtil.cpp b/security/sandbox/linux/SandboxFilterUtil.cpp new file mode 100644 index 0000000000..de065d5483 --- /dev/null +++ b/security/sandbox/linux/SandboxFilterUtil.cpp @@ -0,0 +1,142 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "SandboxFilterUtil.h" + +#ifndef ANDROID +# include <linux/ipc.h> +#endif +#include <linux/net.h> +#include <sys/socket.h> +#include <sys/syscall.h> +#include <unistd.h> + +#include "mozilla/UniquePtr.h" +#include "sandbox/linux/bpf_dsl/bpf_dsl.h" + +// Older kernel headers (mostly Android, but also some older desktop +// distributions) are missing some or all of these: +#ifndef SYS_ACCEPT4 +# define SYS_ACCEPT4 18 +#endif +#ifndef SYS_RECVMMSG +# define SYS_RECVMMSG 19 +#endif +#ifndef SYS_SENDMMSG +# define SYS_SENDMMSG 20 +#endif + +using namespace sandbox::bpf_dsl; +#define CASES SANDBOX_BPF_DSL_CASES + +namespace mozilla { + +sandbox::bpf_dsl::ResultExpr SandboxPolicyBase::EvaluateSyscall( + int aSysno) const { + switch (aSysno) { +#ifdef __NR_socketcall + case __NR_socketcall: { + Arg<int> call(0); + UniquePtr<Caser<int>> acc(new Caser<int>(Switch(call))); + for (int i = SYS_SOCKET; i <= SYS_SENDMMSG; ++i) { + auto thisCase = EvaluateSocketCall(i, false); + // Optimize out cases that are equal to the default. + if (thisCase) { + acc.reset(new Caser<int>(acc->Case(i, *thisCase))); + } + } + return acc->Default(InvalidSyscall()); + } +# ifndef ANDROID + case __NR_ipc: { + Arg<int> callAndVersion(0); + auto call = callAndVersion & 0xFFFF; + UniquePtr<Caser<int>> acc(new Caser<int>(Switch(call))); + for (int i = SEMOP; i <= DIPC; ++i) { + auto thisCase = EvaluateIpcCall(i, 1); + // Optimize out cases that are equal to the default. + if (thisCase) { + acc.reset(new Caser<int>(acc->Case(i, *thisCase))); + } + } + return acc->Default(InvalidSyscall()); + } +# endif // ANDROID +#endif // __NR_socketcall + // clang-format off +#define DISPATCH_SOCKETCALL(sysnum, socketnum) \ + case sysnum: \ + return EvaluateSocketCall(socketnum, true).valueOr(InvalidSyscall()) + DISPATCH_SOCKETCALL(__NR_socket, SYS_SOCKET); + DISPATCH_SOCKETCALL(__NR_bind, SYS_BIND); + DISPATCH_SOCKETCALL(__NR_connect, SYS_CONNECT); + DISPATCH_SOCKETCALL(__NR_listen, SYS_LISTEN); +#ifdef __NR_accept + DISPATCH_SOCKETCALL(__NR_accept, SYS_ACCEPT); +#endif + DISPATCH_SOCKETCALL(__NR_getsockname, SYS_GETSOCKNAME); + DISPATCH_SOCKETCALL(__NR_getpeername, SYS_GETPEERNAME); + DISPATCH_SOCKETCALL(__NR_socketpair, SYS_SOCKETPAIR); +#ifdef __NR_send + DISPATCH_SOCKETCALL(__NR_send, SYS_SEND); + DISPATCH_SOCKETCALL(__NR_recv, SYS_RECV); +#endif // __NR_send + DISPATCH_SOCKETCALL(__NR_sendto, SYS_SENDTO); + DISPATCH_SOCKETCALL(__NR_recvfrom, SYS_RECVFROM); + DISPATCH_SOCKETCALL(__NR_shutdown, SYS_SHUTDOWN); + DISPATCH_SOCKETCALL(__NR_setsockopt, SYS_SETSOCKOPT); + DISPATCH_SOCKETCALL(__NR_getsockopt, SYS_GETSOCKOPT); + DISPATCH_SOCKETCALL(__NR_sendmsg, SYS_SENDMSG); + DISPATCH_SOCKETCALL(__NR_recvmsg, SYS_RECVMSG); + DISPATCH_SOCKETCALL(__NR_accept4, SYS_ACCEPT4); + DISPATCH_SOCKETCALL(__NR_recvmmsg, SYS_RECVMMSG); + DISPATCH_SOCKETCALL(__NR_sendmmsg, SYS_SENDMMSG); +#undef DISPATCH_SOCKETCALL +#ifndef __NR_socketcall +#ifndef ANDROID +#define DISPATCH_SYSVCALL(sysnum, ipcnum) \ + case sysnum: \ + return EvaluateIpcCall(ipcnum, 0).valueOr(InvalidSyscall()) + DISPATCH_SYSVCALL(__NR_semop, SEMOP); + DISPATCH_SYSVCALL(__NR_semget, SEMGET); + DISPATCH_SYSVCALL(__NR_semctl, SEMCTL); + DISPATCH_SYSVCALL(__NR_semtimedop, SEMTIMEDOP); + DISPATCH_SYSVCALL(__NR_msgsnd, MSGSND); + DISPATCH_SYSVCALL(__NR_msgrcv, MSGRCV); + DISPATCH_SYSVCALL(__NR_msgget, MSGGET); + DISPATCH_SYSVCALL(__NR_msgctl, MSGCTL); + DISPATCH_SYSVCALL(__NR_shmat, SHMAT); + DISPATCH_SYSVCALL(__NR_shmdt, SHMDT); + DISPATCH_SYSVCALL(__NR_shmget, SHMGET); + DISPATCH_SYSVCALL(__NR_shmctl, SHMCTL); +#undef DISPATCH_SYSVCALL +#endif // ANDROID +#endif // __NR_socketcall + // clang-format on + default: + return InvalidSyscall(); + } +} + +/* static */ bool SandboxPolicyBase::HasSeparateSocketCalls() { +#ifdef __NR_socketcall + // If we have both syscalls, dynamically detect (and cache). + static const bool kCache = [] { + int fd = syscall(__NR_socket, AF_LOCAL, SOCK_STREAM, 0); + if (fd < 0) { + MOZ_DIAGNOSTIC_ASSERT(errno == ENOSYS); + return false; + } + close(fd); + return true; + }(); + return kCache; +#else // no socketcall; must be separate syscalls + return true; +#endif +} + +} // namespace mozilla |