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Fix MQX example null deref

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This commit is contained in:
Eric Blankenhorn
2025-12-17 09:33:21 -06:00
parent b42e9a9410
commit 5aa2840bed
1 changed files with 7 additions and 5 deletions
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12
mqx/util_lib/Sources/util.c
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@@ -88,9 +88,7 @@ int sdcard_open(MQX_FILE_PTR *com_handle, MQX_FILE_PTR *sdcard_handle,
/* Open partition manager */
*partman_handle = fopen(partman_name, NULL);
if (*partman_handle == NULL) {
error_code = ferror(*partman_handle);
printf("Error opening partition manager: %s\n", MFS_Error_text(
(uint32_t) error_code));
printf("Error opening partition manager: %s\n");
return -64;
}
@@ -119,15 +117,19 @@ int sdcard_open(MQX_FILE_PTR *com_handle, MQX_FILE_PTR *sdcard_handle,
/* Open file system */
*filesystem_handle = fopen(filesystem_name, NULL);
if (*filesystem_handle == NULL) {
printf("Error opening filesystem.\n");
return -67;
}
error_code = ferror(*filesystem_handle);
if ((error_code != MFS_NO_ERROR) && (error_code != MFS_NOT_A_DOS_DISK)) {
printf("Error opening filesystem: %s\n", MFS_Error_text(
(uint32_t) error_code));
return -67;
return -68;
}
if (error_code == MFS_NOT_A_DOS_DISK) {
printf("NOT A DOS DISK! You must format to continue.\n");
return -68;
return -69;
}
return 0;