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Add some safety check for AMDGPU-Pro driver in combination with non-root user

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This commit is contained in:
jsteube 2016-11-11 21:43:10 +01:00
parent 3391dc49cd
commit bc26cae58c
1 changed files with 82 additions and 5 deletions
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87
src/opencl.c
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@ -26,11 +26,80 @@
#include "dynloader.h"
#include "opencl.h"
static const char dri_card0_path[] = "/dev/dri/card0";
static const char drm_card0_vendor_path[] = "/sys/class/drm/card0/device/vendor";
static const char drm_card0_driver_path[] = "/sys/class/drm/card0/device/driver";
static const u32 full01 = 0x01010101;
static const u32 full80 = 0x80808080;
static double TARGET_MSEC_PROFILE[4] = { 2, 12, 96, 480 };
static int ocl_check_dri (MAYBE_UNUSED hashcat_ctx_t *hashcat_ctx)
{
#if defined (__linux__)
// This check makes sense only if we're not root
const uid_t uid = getuid ();
if (uid == 0) return 0;
// No GPU available! That's fine, so we don't need to check if we have access to it.
hc_stat_t stat;
if (hc_stat (dri_card0_path, &stat) == -1) return 0;
// Now we need to check if this an AMD vendor, because this is when the problems start
FILE *fd_drm = fopen (drm_card0_vendor_path, "rb");
if (fd_drm == NULL) return 0;
int vendor = 0;
if (fscanf (fd_drm, "0x%x", &vendor) != 1) return 0;
if (vendor != 4098) return 0;
fclose (fd_drm);
// Now the problem is only with AMDGPU-Pro, not with oldschool AMD driver
char buf[HCBUFSIZ_TINY];
if (readlink (drm_card0_driver_path, buf, HCBUFSIZ_TINY) == -1) return 0;
if (strstr (buf, "amdgpu") == NULL) return 0;
// Now do the real check
FILE *fd_dri = fopen (dri_card0_path, "rb");
if (fd_dri == NULL)
{
event_log_error_nn (hashcat_ctx, "Can not access %s: %s", dri_card0_path, strerror (errno));
event_log_error_nn (hashcat_ctx, "%s", EOL);
event_log_error_nn (hashcat_ctx, "This causes some drivers to crash when OpenCL is used!");
event_log_error_nn (hashcat_ctx, "%s", EOL);
event_log_error_nn (hashcat_ctx, "Usually it's enough to add your user account to the \"video\" group to fix this problem:");
event_log_error_nn (hashcat_ctx, "%s", EOL);
event_log_error_nn (hashcat_ctx, "$ sudo usermod -a -G video $LOGNAME");
event_log_error_nn (hashcat_ctx, "%s", EOL);
event_log_error_nn (hashcat_ctx, "%s", EOL);
return -1;
}
fclose (fd_dri);
#endif
return 0;
}
static void generate_source_kernel_filename (const u32 attack_exec, const u32 attack_kern, const u32 kern_type, char *shared_dir, char *source_file)
{
if (attack_exec == ATTACK_EXEC_INSIDE_KERNEL)
@ -1928,11 +1997,11 @@ int opencl_ctx_init (hashcat_ctx_t *hashcat_ctx)
opencl_ctx->enabled = false;
if (user_options->keyspace == true) return 0;
if (user_options->left == true) return 0;
if (user_options->show == true) return 0;
if (user_options->usage == true) return 0;
if (user_options->version == true) return 0;
if (user_options->keyspace == true) return 0;
if (user_options->left == true) return 0;
if (user_options->show == true) return 0;
if (user_options->usage == true) return 0;
if (user_options->version == true) return 0;
hc_device_param_t *devices_param = (hc_device_param_t *) hccalloc (hashcat_ctx, DEVICES_MAX, sizeof (hc_device_param_t)); VERIFY_PTR (devices_param);
@ -1950,6 +2019,14 @@ int opencl_ctx_init (hashcat_ctx_t *hashcat_ctx)
if (rc_ocl_init == -1) return -1;
/**
* Some permission pre-check, because AMDGPU-Pro Driver crashes if the user has no permission to do this
*/
const int rc_ocl_check = ocl_check_dri (hashcat_ctx);
if (rc_ocl_check == -1) return -1;
/**
* OpenCL platform selection
*/