--- ./texk/web2c/texmfmp.h.orig	2021-06-25 11:32:31.312905780 +0000
+++ ./texk/web2c/texmfmp.h	2021-06-25 11:32:52.192921107 +0000
@@ -266,11 +266,28 @@
 #define bopenout(f)	open_output (&(f), FOPEN_WBIN_MODE)
 #define bclose		aclose
 #ifdef FMT_COMPRESS
+
+#include <android/fdsan.h>
+#include <dlfcn.h>
+
+/* termux hack to disable file descriptor sanitizer */
+static int disable_fdsan() {
+  void *lib_handle = dlopen("libc.so", RTLD_LAZY);
+  if (lib_handle) {
+    void (*set_fdsan_error_level)(enum android_fdsan_error_level newlevel) = dlsym(lib_handle, "android_fdsan_set_error_level");
+    if (set_fdsan_error_level) {
+      set_fdsan_error_level(ANDROID_FDSAN_ERROR_LEVEL_DISABLED);
+    }
+    dlclose(lib_handle);
+  }
+  return 1;
+}
+
 /* f is declared as gzFile, but we temporarily use it for a FILE *
    so that we can use the standard open calls */
-#define wopenin(f)	(open_input ((FILE**)&(f), DUMP_FORMAT, FOPEN_RBIN_MODE) \
+#define wopenin(f)	(disable_fdsan() && open_input ((FILE**)&(f), DUMP_FORMAT, FOPEN_RBIN_MODE) \
 						&& (f = gzdopen(fileno((FILE*)f), FOPEN_RBIN_MODE)))
-#define wopenout(f)	(open_output ((FILE**)&(f), FOPEN_WBIN_MODE) \
+#define wopenout(f)	(disable_fdsan() && open_output ((FILE**)&(f), FOPEN_WBIN_MODE) \
 						&& (f = gzdopen(fileno((FILE*)f), FOPEN_WBIN_MODE)) \
 						&& (gzsetparams(f, 1, Z_DEFAULT_STRATEGY) == Z_OK))
 #define wclose(f)	gzclose(f)
--- ./texk/web2c/luatexdir/tex/mainbody.c~	2021-04-11 21:33:43.000000000 +0000
+++ ./texk/web2c/luatexdir/tex/mainbody.c	2021-06-29 17:10:06.155100280 +0000
@@ -23,6 +23,23 @@
 
 #include "ptexlib.h"
 
+#ifdef __ANDROID__
+#include <android/fdsan.h>
+#include <dlfcn.h>
+#endif
+
+void disable_fdsan() {
+  // For Android 11+.
+  void *lib_handle = dlopen("libc.so", RTLD_LAZY);
+  if (lib_handle) {
+    void (*set_fdsan_error_level)(enum android_fdsan_error_level newlevel) = dlsym(lib_handle, "android_fdsan_set_error_level");
+    if (set_fdsan_error_level) {
+      set_fdsan_error_level(ANDROID_FDSAN_ERROR_LEVEL_DISABLED);
+    }
+    dlclose(lib_handle);
+  }
+}
+
 /*tex
 
 This is where the action starts. We're speaking of \LUATEX, a continuation of
@@ -506,6 +523,9 @@
     int bad = main_initialize();
     /*tex in case we quit during initialization */
     history = fatal_error_stop;
+#ifdef __ANDROID__
+    disable_fdsan();
+#endif
     /*tex open the terminal for output */
     t_open_out();
     if (!luainit)