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Merge pull request #207 from X0rg/master
Support module loading from new darling executable
authored by
Luboš Doležel
and committed by
GitHub
cf5e7e2b
2a0ace3e
+80
-2
+74
src/dyld/darling.c
+74
src/dyld/darling.c
···
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#include <sys/mount.h>
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#include <sys/wait.h>
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#include <sys/prctl.h>
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#include <sys/utsname.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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#include "darling.h"
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#include "darling-config.h"
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···
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return 1;
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}*/
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if (loadKernelModule())
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return 1;
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// Temporarily drop root privileges
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g_originalUid = getuid();
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seteuid(getuid());
···
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}
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// TODO: Spawn the executable in the namespace, wait for it and return its exit code
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unloadKernelModule();
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return 0;
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}
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···
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exit(1);
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}
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}
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int isModuleLoaded()
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{
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size_t len = 0;
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ssize_t read = 0;
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char * line = NULL;
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FILE *fp = NULL;
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if ((fp = fopen("/proc/modules", "r")) == NULL)
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{
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fprintf(stderr, "Failure opening /proc/modules: %s\n", strerror(errno));
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return 0;
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}
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while (!feof(fp))
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{
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read = getline(&line, &len, fp);
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if (read > 0 && strstr(line, "darling_mach") != NULL)
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return 1;
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}
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return 0;
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}
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int loadKernelModule()
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{
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int fd;
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char path[128];
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struct utsname name;
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if (isModuleLoaded())
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return 0;
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uname(&name);
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sprintf(path, "/lib/modules/%s/kernel/misc/darling-mach.ko", name.release);
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if (access(path, F_OK))
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{
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fprintf(stderr, "Cannot find kernel module at %s: %s\n", path, strerror(errno));
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return 1;
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}
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fd = open(path, O_RDONLY|O_CLOEXEC);
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if (fd < 0)
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{
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fprintf(stderr, "Cannot open kernel module\n");
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return 1;
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}
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if (syscall(SYS_finit_module, fd, "", 0))
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{
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fprintf(stderr, "Cannot load kernel module: %s\n", strerror(errno));
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return 1;
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}
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return 0;
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}
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int unloadKernelModule()
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{
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if(syscall(SYS_delete_module, "darling_mach", 0))
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{
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fprintf(stderr, "Cannot unload kernel module: %s\n", strerror(errno));
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return 1;
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}
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return 0;
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}
+5
-1
src/dyld/darling.h
+5
-1
src/dyld/darling.h