OpenCL Runtime: Workaround ROCm OpenCL driver problem trying to write temporary file into readonly folder by setting TMPDIR environment variable

docs/changes.txt

@@ -69,6 +69,7 @@
 - OpenCL Runtime: Workaround JiT compiler error on AMDGPU driver compiling WPA-EAPOL-PBKDF2 OpenCL kernel
 - OpenCL Runtime: Workaround JiT compiler error on ROCM 2.3 driver if the 'inline' keyword is used in function declaration
 - OpenCL Runtime: Workaround memory allocation error on AMD driver on Windows leading to CL_MEM_OBJECT_ALLOCATION_FAILURE
+- OpenCL Runtime: Workaround ROCm OpenCL driver problem trying to write temporary file into readonly folder by setting TMPDIR
 - Startup Screen: Provide an estimate of host memory requirements for the requested attack
 - Tuning Database: Updated hashcat.hctune with new models and refreshed vector width values
 - WPA/WPA2 cracking: In the potfile, replace password with PMK in order to detect already cracked networks across all WPA modes

include/shared.h

@@ -40,7 +40,7 @@ void naive_escape (char *s, size_t s_max, const char key_char, const char escape
 
 __attribute__ ((format (printf, 2, 3))) int hc_asprintf (char **strp, const char *fmt, ...);
 
-void setup_environment_variables (void);
+void setup_environment_variables (const folder_config_t *folder_config);
 void setup_umask (void);
 void setup_seeding (const bool rp_gen_seed_chgd, const u32 rp_gen_seed);
 

src/hashcat.c

@@ -1108,7 +1108,7 @@ int hashcat_session_init (hashcat_ctx_t *hashcat_ctx, const char *install_folder
    * To help users a bit
    */
 
-  setup_environment_variables ();
+  setup_environment_variables (hashcat_ctx->folder_config);
 
   setup_umask ();
 

src/shared.c

@@ -7,6 +7,7 @@
 #include "types.h"
 #include "convert.h"
 #include "shared.h"
+#include "memory.h"
 
 #if defined (__CYGWIN__)
 #include <sys/cygwin.h>
@@ -467,7 +468,7 @@ bool hc_string_is_digit (const char *s)
   return true;
 }
 
-void setup_environment_variables ()
+void setup_environment_variables (const folder_config_t *folder_config)
 {
   char *compute = getenv ("COMPUTE");
 
@@ -498,6 +499,17 @@ void setup_environment_variables ()
     putenv ((char *) "POCL_KERNEL_CACHE=0");
   */
 
+  if (getenv ("TMPDIR") == NULL)
+  {
+    char *tmpdir = NULL;
+
+    hc_asprintf (&tmpdir, "TMPDIR=%s", folder_config->profile_dir);
+
+    putenv (tmpdir);
+
+    // we can't free tmpdir at this point!
+  }
+
   if (getenv ("CL_CONFIG_USE_VECTORIZER") == NULL)
     putenv ((char *) "CL_CONFIG_USE_VECTORIZER=False");