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https://github.com/QingdaoU/Judger.git
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add golang and node seccomp rules
This commit is contained in:
parent
cdd3dc21d0
commit
57ac33aa43
10
src/child.c
10
src/child.c
@ -153,6 +153,16 @@ void child_process(FILE *log_fp, struct config *_config) {
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CHILD_ERROR_EXIT(LOAD_SECCOMP_FAILED);
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}
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}
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else if (strcmp("golang", _config->seccomp_rule_name) == 0) {
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if (golang_seccomp_rules(_config) != SUCCESS ) {
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CHILD_ERROR_EXIT(LOAD_SECCOMP_FAILED);
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}
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}
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else if (strcmp("node", _config->seccomp_rule_name) == 0) {
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if (node_seccomp_rules(_config) != SUCCESS ) {
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CHILD_ERROR_EXIT(LOAD_SECCOMP_FAILED);
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}
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}
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// other rules
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else {
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// rule does not exist
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51
src/rules/golang.c
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51
src/rules/golang.c
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@ -0,0 +1,51 @@
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#include <stdio.h>
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#include <seccomp.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "../runner.h"
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int golang_seccomp_rules(struct config *_config) {
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int syscalls_blacklist[] = {SCMP_SYS(socket),
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SCMP_SYS(fork), SCMP_SYS(vfork),
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SCMP_SYS(kill),
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#ifdef __NR_execveat
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SCMP_SYS(execveat)
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#endif
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};
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int syscalls_blacklist_length = sizeof(syscalls_blacklist) / sizeof(int);
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scmp_filter_ctx ctx = NULL;
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// load seccomp rules
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ctx = seccomp_init(SCMP_ACT_ALLOW);
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if (!ctx) {
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return LOAD_SECCOMP_FAILED;
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}
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for (int i = 0; i < syscalls_blacklist_length; i++) {
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if (seccomp_rule_add(ctx, SCMP_ACT_KILL, syscalls_blacklist[i], 0) != 0) {
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return LOAD_SECCOMP_FAILED;
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}
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}
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// do not allow "w" and "rw" using open
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if (seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(open), 1, SCMP_CMP(1, SCMP_CMP_MASKED_EQ, O_WRONLY, O_WRONLY)) != 0) {
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return LOAD_SECCOMP_FAILED;
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}
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if (seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(open), 1, SCMP_CMP(1, SCMP_CMP_MASKED_EQ, O_RDWR, O_RDWR)) != 0) {
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return LOAD_SECCOMP_FAILED;
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}
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// do not allow "w" and "rw" using openat
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if (seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(openat), 1, SCMP_CMP(2, SCMP_CMP_MASKED_EQ, O_WRONLY, O_WRONLY)) != 0) {
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return LOAD_SECCOMP_FAILED;
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}
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if (seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(openat), 1, SCMP_CMP(2, SCMP_CMP_MASKED_EQ, O_RDWR, O_RDWR)) != 0) {
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return LOAD_SECCOMP_FAILED;
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}
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if (seccomp_load(ctx) != 0) {
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return LOAD_SECCOMP_FAILED;
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}
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seccomp_release(ctx);
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return 0;
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}
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36
src/rules/node.c
Normal file
36
src/rules/node.c
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@ -0,0 +1,36 @@
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#include <stdio.h>
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#include <seccomp.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "../runner.h"
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int node_seccomp_rules(struct config *_config) {
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int syscalls_blacklist[] = {SCMP_SYS(socket),
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SCMP_SYS(fork), SCMP_SYS(vfork),
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SCMP_SYS(kill),
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#ifdef __NR_execveat
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SCMP_SYS(execveat)
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#endif
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};
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int syscalls_blacklist_length = sizeof(syscalls_blacklist) / sizeof(int);
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scmp_filter_ctx ctx = NULL;
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// load seccomp rules
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ctx = seccomp_init(SCMP_ACT_ALLOW);
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if (!ctx) {
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return LOAD_SECCOMP_FAILED;
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}
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for (int i = 0; i < syscalls_blacklist_length; i++) {
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if (seccomp_rule_add(ctx, SCMP_ACT_KILL, syscalls_blacklist[i], 0) != 0) {
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return LOAD_SECCOMP_FAILED;
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}
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}
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if (seccomp_load(ctx) != 0) {
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return LOAD_SECCOMP_FAILED;
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}
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seccomp_release(ctx);
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return 0;
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}
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@ -7,5 +7,7 @@ int _c_cpp_seccomp_rules(struct config *_config, bool allow_write_file);
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int c_cpp_seccomp_rules(struct config *_config);
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int general_seccomp_rules(struct config *_config);
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int c_cpp_file_io_seccomp_rules(struct config *_config);
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int golang_seccomp_rules(struct config *_config);
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int node_seccomp_rules(struct config *_config);
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#endif //JUDGER_SECCOMP_RULES_H
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