[tools] fix segfault when using the maxlen argument (#4359)

[openwrt.git] / tools / firmware-utils / src / trx.c

diff --git a/tools/firmware-utils/src/trx.c b/tools/firmware-utils/src/trx.c
index 1131238..5e5e77a 100644 (file)
--- a/tools/firmware-utils/src/trx.c
+++ b/tools/firmware-utils/src/trx.c
@@ -88,7 +88,7 @@ int main(int argc, char **argv)
        char *ofn = NULL;
        char *buf;
        char *e;
-       int c, i, append;
+       int c, i, append = 0;
        size_t n;
        uint32_t cur_len;
        unsigned long maxlen = TRX_MAX_LEN;
@@ -172,6 +172,7 @@ int main(int argc, char **argv)
                                        fprintf(stderr, "realloc failed");
                                        return EXIT_FAILURE;
                                }
+                               p = (struct trx_header *) buf;
                                break;
                        case 'a':
                                errno = 0;
@@ -230,7 +231,7 @@ int main(int argc, char **argv)
        }
 
        fclose(out);
-
+       
        return EXIT_SUCCESS;
 }