diff options
Diffstat (limited to 'src/test/test-seccomp.c')
| -rw-r--r-- | src/test/test-seccomp.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/test-seccomp.c b/src/test/test-seccomp.c index 4c704ba..874f08b 100644 --- a/src/test/test-seccomp.c +++ b/src/test/test-seccomp.c @@ -21,6 +21,7 @@ #include "macro.h" #include "memory-util.h" #include "missing_sched.h" +#include "missing_syscall_def.h" #include "nsflags.h" #include "nulstr-util.h" #include "process-util.h" @@ -1003,6 +1004,23 @@ static int real_open(const char *path, int flags, mode_t mode) { #endif } +static int try_fchmodat2(int dirfd, const char *path, int flags, mode_t mode) { + /* glibc does not provide a direct wrapper for fchmodat2(). Let's hence define our own wrapper for + * testing purposes that calls the real syscall, on architectures and in environments where + * SYS_fchmodat2 is defined. Otherwise, let's just fall back to the glibc fchmodat() call. */ + +#if defined __NR_fchmodat2 && __NR_fchmodat2 >= 0 + int r; + r = (int) syscall(__NR_fchmodat2, dirfd, path, flags, mode); + /* The syscall might still be unsupported by kernel or libseccomp. */ + if (r < 0 && errno == ENOSYS) + return fchmodat(dirfd, path, flags, mode); + return r; +#else + return fchmodat(dirfd, path, flags, mode); +#endif +} + TEST(restrict_suid_sgid) { pid_t pid; @@ -1044,6 +1062,11 @@ TEST(restrict_suid_sgid) { assert_se(fchmodat(AT_FDCWD, path, 0755 | S_ISGID | S_ISUID, 0) >= 0); assert_se(fchmodat(AT_FDCWD, path, 0755, 0) >= 0); + assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISUID, 0) >= 0); + assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISGID, 0) >= 0); + assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISGID | S_ISUID, 0) >= 0); + assert_se(try_fchmodat2(AT_FDCWD, path, 0755, 0) >= 0); + k = real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID); k = safe_close(k); assert_se(unlink(z) >= 0); @@ -1145,6 +1168,11 @@ TEST(restrict_suid_sgid) { assert_se(fchmodat(AT_FDCWD, path, 0755 | S_ISGID | S_ISUID, 0) < 0 && errno == EPERM); assert_se(fchmodat(AT_FDCWD, path, 0755, 0) >= 0); + assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISUID, 0) < 0 && errno == EPERM); + assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISGID, 0) < 0 && errno == EPERM); + assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISGID | S_ISUID, 0) < 0 && errno == EPERM); + assert_se(try_fchmodat2(AT_FDCWD, path, 0755, 0) >= 0); + assert_se(real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID) < 0 && errno == EPERM); assert_se(real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISGID) < 0 && errno == EPERM); assert_se(real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID | S_ISGID) < 0 && errno == EPERM); |