@@ -144,6 +144,10 @@ static unrar_fileheader_t *read_block(int fd, header_type hdr_type)

     for (;;) {

 	offset = lseek(fd, 0, SEEK_CUR);

+    if (offset == -1) {

+        unrar_dbgmsg("UNRAR: seek: call to lseek() failed in read_block\n");

+        return NULL;

+    }

 	file_header = read_header(fd, FILE_HEAD);

 	if(!file_header)

 	    return NULL;

@@ -310,6 +314,13 @@ int unrar_open(int fd, const char *dirname, unrar_state_t *state)

 	unrar_comment_header_t *comment_header;

 	unrar_dbgmsg("UNRAR: RAR main comment\n");

 	offset = lseek(fd, 0, SEEK_CUR);

+    if (offset == -1) {

+        unrar_dbgmsg("UNRAR: seek: lseek() call failed in unrar_open\n");

+        free(main_hdr);

+        free(state->comment_dir);

+        free(unpack_data);

+        return UNRAR_ERR;

+    }

 	unrar_dbgmsg("UNRAR: Offset: %x\n", offset);

 	if(offset < 0){

 	    unrar_dbgmsg("UNRAR: Error Offset: %d\n", offset);

@@ -352,7 +363,17 @@ int unrar_open(int fd, const char *dirname, unrar_state_t *state)

 	    }

 	    free(comment_header);

 	}

-	lseek(fd, offset, SEEK_SET);

+	if (lseek(fd, offset, SEEK_SET) == -1) {

+        unrar_dbgmsg("UNRAR: seek: call to lseek() failed in unrar_open: %ld\n", offset);

+        free(main_hdr);

+        free(comment_header);

+        ppm_destructor(&unpack_data->ppm_data);

+        rar_init_filters(unpack_data);

+        unpack_free_data(unpack_data);

+        free(unpack_data);

+        free(state->comment_dir);

+        return UNRAR_ERR;

+    }

     }

     if(main_hdr->head_size > SIZEOF_NEWMHD) {