diff options
| -rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_syscall_macro.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c b/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c index c8e60220cda8..f5c6ef2ff6d1 100644 --- a/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c +++ b/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c @@ -28,6 +28,7 @@ int BPF_KPROBE(handle_sys_prctl) { struct pt_regs *real_regs; pid_t pid = bpf_get_current_pid_tgid() >> 32; + unsigned long tmp; if (pid != filter_pid) return 0; @@ -35,7 +36,9 @@ int BPF_KPROBE(handle_sys_prctl) real_regs = (struct pt_regs *)PT_REGS_PARM1(ctx); /* test for PT_REGS_PARM */ - bpf_probe_read_kernel(&arg1, sizeof(arg1), &PT_REGS_PARM1_SYSCALL(real_regs)); + + bpf_probe_read_kernel(&tmp, sizeof(tmp), &PT_REGS_PARM1_SYSCALL(real_regs)); + arg1 = tmp; bpf_probe_read_kernel(&arg2, sizeof(arg2), &PT_REGS_PARM2_SYSCALL(real_regs)); bpf_probe_read_kernel(&arg3, sizeof(arg3), &PT_REGS_PARM3_SYSCALL(real_regs)); bpf_probe_read_kernel(&arg4_cx, sizeof(arg4_cx), &PT_REGS_PARM4(real_regs)); |