From b604a007d64cc28fdaeee3ef7c1ecc9f725fb209 Mon Sep 17 00:00:00 2001
From: Marco Edoardo Santimaria <marcoedoardo.santimaria@unito.it>
Date: Sat, 6 Dec 2025 11:55:34 +0100
Subject: [PATCH] Fixed bug on stat handler

---
 capio/posix/handlers/stat.hpp  | 9 +++++++++
 capio/posix/handlers/statx.hpp | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/capio/posix/handlers/stat.hpp b/capio/posix/handlers/stat.hpp
index a205a50aa..7685098d6 100644
--- a/capio/posix/handlers/stat.hpp
+++ b/capio/posix/handlers/stat.hpp
@@ -150,6 +150,9 @@ int fstat_handler(long arg0, long arg1, long arg2, long arg3, long arg4, long ar
 
 int fstatat_handler(long arg0, long arg1, long arg2, long arg3, long arg4, long arg5,
                     long *result) {
+    if (arg1 == NULL || arg2 == NULL) {
+        return CAPIO_POSIX_SYSCALL_SKIP;
+    }
     auto dirfd = static_cast<int>(arg0);
     const std::string_view pathname(reinterpret_cast<const char *>(arg1));
     auto *statbuf = reinterpret_cast<struct stat *>(arg2);
@@ -160,6 +163,9 @@ int fstatat_handler(long arg0, long arg1, long arg2, long arg3, long arg4, long
 }
 
 int lstat_handler(long arg0, long arg1, long arg2, long arg3, long arg4, long arg5, long *result) {
+    if (arg0 == NULL) {
+        return CAPIO_POSIX_SYSCALL_SKIP;
+    }
     const std::string_view pathname(reinterpret_cast<const char *>(arg0));
     auto *buf = reinterpret_cast<struct stat *>(arg1);
     long tid  = syscall_no_intercept(SYS_gettid);
@@ -168,6 +174,9 @@ int lstat_handler(long arg0, long arg1, long arg2, long arg3, long arg4, long ar
 }
 
 int stat_handler(long arg0, long arg1, long arg2, long arg3, long arg4, long arg5, long *result) {
+    if (arg0 == NULL) {
+        return CAPIO_POSIX_SYSCALL_SKIP;
+    }
     const std::string_view pathname(reinterpret_cast<const char *>(arg0));
     auto *buf = reinterpret_cast<struct stat *>(arg1);
     long tid  = syscall_no_intercept(SYS_gettid);
diff --git a/capio/posix/handlers/statx.hpp b/capio/posix/handlers/statx.hpp
index bfe984d8a..2045a968c 100644
--- a/capio/posix/handlers/statx.hpp
+++ b/capio/posix/handlers/statx.hpp
@@ -102,6 +102,10 @@ inline int capio_statx(int dirfd, const std::string_view &pathname, int flags, i
 }
 
 int statx_handler(long arg0, long arg1, long arg2, long arg3, long arg4, long arg5, long *result) {
+    if (arg1 == NULL) {
+        return CAPIO_POSIX_SYSCALL_SKIP;
+    }
+
     auto dirfd = static_cast<int>(arg0);
     const std::string_view pathname(reinterpret_cast<const char *>(arg1));
     auto flags = static_cast<int>(arg2);