add golang and node seccomp rules

This commit is contained in:
virusdefender 2021-09-28 14:28:18 +08:00
parent cdd3dc21d0
commit 57ac33aa43
4 changed files with 99 additions and 0 deletions

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@ -153,6 +153,16 @@ void child_process(FILE *log_fp, struct config *_config) {
CHILD_ERROR_EXIT(LOAD_SECCOMP_FAILED);
}
}
else if (strcmp("golang", _config->seccomp_rule_name) == 0) {
if (golang_seccomp_rules(_config) != SUCCESS ) {
CHILD_ERROR_EXIT(LOAD_SECCOMP_FAILED);
}
}
else if (strcmp("node", _config->seccomp_rule_name) == 0) {
if (node_seccomp_rules(_config) != SUCCESS ) {
CHILD_ERROR_EXIT(LOAD_SECCOMP_FAILED);
}
}
// other rules
else {
// rule does not exist

51
src/rules/golang.c Normal file
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@ -0,0 +1,51 @@
#include <stdio.h>
#include <seccomp.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "../runner.h"
int golang_seccomp_rules(struct config *_config) {
int syscalls_blacklist[] = {SCMP_SYS(socket),
SCMP_SYS(fork), SCMP_SYS(vfork),
SCMP_SYS(kill),
#ifdef __NR_execveat
SCMP_SYS(execveat)
#endif
};
int syscalls_blacklist_length = sizeof(syscalls_blacklist) / sizeof(int);
scmp_filter_ctx ctx = NULL;
// load seccomp rules
ctx = seccomp_init(SCMP_ACT_ALLOW);
if (!ctx) {
return LOAD_SECCOMP_FAILED;
}
for (int i = 0; i < syscalls_blacklist_length; i++) {
if (seccomp_rule_add(ctx, SCMP_ACT_KILL, syscalls_blacklist[i], 0) != 0) {
return LOAD_SECCOMP_FAILED;
}
}
// do not allow "w" and "rw" using open
if (seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(open), 1, SCMP_CMP(1, SCMP_CMP_MASKED_EQ, O_WRONLY, O_WRONLY)) != 0) {
return LOAD_SECCOMP_FAILED;
}
if (seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(open), 1, SCMP_CMP(1, SCMP_CMP_MASKED_EQ, O_RDWR, O_RDWR)) != 0) {
return LOAD_SECCOMP_FAILED;
}
// do not allow "w" and "rw" using openat
if (seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(openat), 1, SCMP_CMP(2, SCMP_CMP_MASKED_EQ, O_WRONLY, O_WRONLY)) != 0) {
return LOAD_SECCOMP_FAILED;
}
if (seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(openat), 1, SCMP_CMP(2, SCMP_CMP_MASKED_EQ, O_RDWR, O_RDWR)) != 0) {
return LOAD_SECCOMP_FAILED;
}
if (seccomp_load(ctx) != 0) {
return LOAD_SECCOMP_FAILED;
}
seccomp_release(ctx);
return 0;
}

36
src/rules/node.c Normal file
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@ -0,0 +1,36 @@
#include <stdio.h>
#include <seccomp.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "../runner.h"
int node_seccomp_rules(struct config *_config) {
int syscalls_blacklist[] = {SCMP_SYS(socket),
SCMP_SYS(fork), SCMP_SYS(vfork),
SCMP_SYS(kill),
#ifdef __NR_execveat
SCMP_SYS(execveat)
#endif
};
int syscalls_blacklist_length = sizeof(syscalls_blacklist) / sizeof(int);
scmp_filter_ctx ctx = NULL;
// load seccomp rules
ctx = seccomp_init(SCMP_ACT_ALLOW);
if (!ctx) {
return LOAD_SECCOMP_FAILED;
}
for (int i = 0; i < syscalls_blacklist_length; i++) {
if (seccomp_rule_add(ctx, SCMP_ACT_KILL, syscalls_blacklist[i], 0) != 0) {
return LOAD_SECCOMP_FAILED;
}
}
if (seccomp_load(ctx) != 0) {
return LOAD_SECCOMP_FAILED;
}
seccomp_release(ctx);
return 0;
}

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@ -7,5 +7,7 @@ int _c_cpp_seccomp_rules(struct config *_config, bool allow_write_file);
int c_cpp_seccomp_rules(struct config *_config);
int general_seccomp_rules(struct config *_config);
int c_cpp_file_io_seccomp_rules(struct config *_config);
int golang_seccomp_rules(struct config *_config);
int node_seccomp_rules(struct config *_config);
#endif //JUDGER_SECCOMP_RULES_H