diff --git a/core/hakmem_tiny_superslab.c b/core/hakmem_tiny_superslab.c
index 21b01eb7..0f8ef63c 100644
--- a/core/hakmem_tiny_superslab.c
+++ b/core/hakmem_tiny_superslab.c
@@ -117,6 +117,12 @@ static void log_superslab_oom_once(size_t ss_size, size_t alloc_size, int err) {
     if (logged) return;
     logged = 1;
 
+    // CRITICAL FIX: Increment lock depth FIRST before any LIBC calls
+    // fopen/fclose/getrlimit/fprintf all may call malloc internally
+    // Must bypass HAKMEM wrapper to avoid header mismatch crash
+    extern __thread int g_hakmem_lock_depth;
+    g_hakmem_lock_depth++;  // Force wrapper to use __libc_malloc
+
     struct rlimit rl = {0};
     if (getrlimit(RLIMIT_AS, &rl) != 0) {
         rl.rlim_cur = RLIM_INFINITY;
@@ -125,10 +131,6 @@ static void log_superslab_oom_once(size_t ss_size, size_t alloc_size, int err) {
 
     unsigned long vm_size_kb = 0;
     unsigned long vm_rss_kb = 0;
-    // CRITICAL FIX: fopen/fclose use GLIBC malloc/free internally
-    // Must bypass HAKMEM wrapper to avoid header mismatch crash
-    extern __thread int g_hakmem_lock_depth;
-    g_hakmem_lock_depth++;  // Force wrapper to use __libc_malloc
     FILE* status = fopen("/proc/self/status", "r");
     if (status) {
         char line[256];