#include <stdio.h>
#include <string.h>
+#include <sys/ptrace.h>
#include <sys/stat.h>
#include <sanitizer/linux_syscall_hooks.h>
__sanitizer_syscall_post_mq_timedreceive(kFortyTwo, 5, buf, sizeof(buf), &prio, 0);
assert(__msan_test_shadow(buf, sizeof(buf)) == kFortyTwo);
assert(__msan_test_shadow(&prio, sizeof(prio)) == -1);
+
+ __msan_poison(buf, sizeof(buf));
+ __sanitizer_syscall_post_ptrace(0, PTRACE_PEEKUSER, kFortyTwo, 0xABCD, buf);
+ assert(__msan_test_shadow(buf, sizeof(buf)) == sizeof(void *));
return 0;
}
POST_SYSCALL(ni_syscall)(long res) {}
-PRE_SYSCALL(ptrace)(long request, long pid, long addr, long data) {}
+PRE_SYSCALL(ptrace)(long request, long pid, long addr, long data) {
+ if (data) {
+ if (request == ptrace_setregs) {
+ PRE_READ((void *)data, struct_user_regs_struct_sz);
+ } else if (request == ptrace_setfpregs) {
+ PRE_READ((void *)data, struct_user_fpregs_struct_sz);
+ } else if (request == ptrace_setfpxregs) {
+ PRE_READ((void *)data, struct_user_fpxregs_struct_sz);
+ } else if (request == ptrace_setsiginfo) {
+ PRE_READ((void *)data, siginfo_t_sz);
+ } else if (request == ptrace_setregset) {
+ __sanitizer_iovec *iov = (__sanitizer_iovec *)data;
+ PRE_READ(iov->iov_base, iov->iov_len);
+ }
+ }
+}
-POST_SYSCALL(ptrace)(long res, long request, long pid, long addr, long data) {}
+POST_SYSCALL(ptrace)(long res, long request, long pid, long addr, long data) {
+ if (res >= 0 && data) {
+ // Note that this is different from the interceptor in
+ // sanitizer_common_interceptors.inc.
+ // PEEK* requests return resulting values through data pointer.
+ if (request == ptrace_getregs) {
+ POST_WRITE((void *)data, struct_user_regs_struct_sz);
+ } else if (request == ptrace_getfpregs) {
+ POST_WRITE((void *)data, struct_user_fpregs_struct_sz);
+ } else if (request == ptrace_getfpxregs) {
+ POST_WRITE((void *)data, struct_user_fpxregs_struct_sz);
+ } else if (request == ptrace_getsiginfo) {
+ POST_WRITE((void *)data, siginfo_t_sz);
+ } else if (request == ptrace_getregset) {
+ __sanitizer_iovec *iov = (__sanitizer_iovec *)data;
+ POST_WRITE(iov->iov_base, iov->iov_len);
+ } else if (request == ptrace_peekdata || request == ptrace_peektext ||
+ request == ptrace_peekuser) {
+ POST_WRITE((void *)data, sizeof(void *));
+ }
+ }
+}
PRE_SYSCALL(add_key)(const void *_type, const void *_description,
const void *_payload, long plen, long destringid) {