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util: Make sure syscall numbers used in profile are defined

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Define the following syscall numbers for x86_64, so that the profile
will be the same no matter what kernel is built against, including
kernels that don't have `__NR_statx`:
```c++
 #define __NR_statx 332
 #define __NR_getrandom 318
 #define __NR_membarrier 324
```
This commit is contained in:
W. J. van der Laan 2021-10-05 08:13:02 +02:00
parent 8289d19ea5
commit 2d0279987e
1 changed files with 14 additions and 8 deletions
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22
src/util/syscall_sandbox.cpp
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@ -44,6 +44,20 @@ bool g_syscall_sandbox_log_violation_before_terminating{false};
#define SECCOMP_RET_KILL_PROCESS 0x80000000U #define SECCOMP_RET_KILL_PROCESS 0x80000000U
#endif #endif
// Define system call numbers for x86_64 that are referenced in the system call profile
// but not provided by the kernel headers used in the GUIX build.
#ifndef __NR_statx
#define __NR_statx 332
#endif
#ifndef __NR_getrandom
#define __NR_getrandom 318
#endif
#ifndef __NR_membarrier
#define __NR_membarrier 324
#endif
// This list of syscalls in LINUX_SYSCALLS is only used to map syscall numbers to syscall names in // This list of syscalls in LINUX_SYSCALLS is only used to map syscall numbers to syscall names in
// order to be able to print user friendly error messages which include the syscall name in addition // order to be able to print user friendly error messages which include the syscall name in addition
// to the syscall number. // to the syscall number.
@ -162,9 +176,7 @@ const std::map<uint32_t, std::string> LINUX_SYSCALLS{
{__NR_getpmsg, "getpmsg"}, {__NR_getpmsg, "getpmsg"},
{__NR_getppid, "getppid"}, {__NR_getppid, "getppid"},
{__NR_getpriority, "getpriority"}, {__NR_getpriority, "getpriority"},
#if defined(__NR_getrandom)
{__NR_getrandom, "getrandom"}, {__NR_getrandom, "getrandom"},
#endif // defined(__NR_getrandom)
{__NR_getresgid, "getresgid"}, {__NR_getresgid, "getresgid"},
{__NR_getresuid, "getresuid"}, {__NR_getresuid, "getresuid"},
{__NR_getrlimit, "getrlimit"}, {__NR_getrlimit, "getrlimit"},
@ -212,9 +224,7 @@ const std::map<uint32_t, std::string> LINUX_SYSCALLS{
{__NR_lstat, "lstat"}, {__NR_lstat, "lstat"},
{__NR_madvise, "madvise"}, {__NR_madvise, "madvise"},
{__NR_mbind, "mbind"}, {__NR_mbind, "mbind"},
#if defined(__NR_membarrier)
{__NR_membarrier, "membarrier"}, {__NR_membarrier, "membarrier"},
#endif // defined(__NR_membarrier)
{__NR_memfd_create, "memfd_create"}, {__NR_memfd_create, "memfd_create"},
{__NR_migrate_pages, "migrate_pages"}, {__NR_migrate_pages, "migrate_pages"},
{__NR_mincore, "mincore"}, {__NR_mincore, "mincore"},
@ -515,9 +525,7 @@ public:
{ {
allowed_syscalls.insert(__NR_brk); // change data segment size allowed_syscalls.insert(__NR_brk); // change data segment size
allowed_syscalls.insert(__NR_madvise); // give advice about use of memory allowed_syscalls.insert(__NR_madvise); // give advice about use of memory
#if defined(__NR_membarrier)
allowed_syscalls.insert(__NR_membarrier); // issue memory barriers on a set of threads allowed_syscalls.insert(__NR_membarrier); // issue memory barriers on a set of threads
#endif // defined(__NR_membarrier)
allowed_syscalls.insert(__NR_mlock); // lock memory allowed_syscalls.insert(__NR_mlock); // lock memory
allowed_syscalls.insert(__NR_mmap); // map files or devices into memory allowed_syscalls.insert(__NR_mmap); // map files or devices into memory
allowed_syscalls.insert(__NR_mprotect); // set protection on a region of memory allowed_syscalls.insert(__NR_mprotect); // set protection on a region of memory
@ -595,9 +603,7 @@ public:
void AllowGetRandom() void AllowGetRandom()
{ {
#if defined(__NR_getrandom)
allowed_syscalls.insert(__NR_getrandom); // obtain a series of random bytes allowed_syscalls.insert(__NR_getrandom); // obtain a series of random bytes
#endif // defined(__NR_getrandom)
} }
void AllowGetSimpleId() void AllowGetSimpleId()