Fix: source.ctf.fs: 0-length packet index length causes SIGFPE

[babeltrace.git] / src / plugins / ctf / fs-src / data-stream-file.c

diff --git a/src/plugins/ctf/fs-src/data-stream-file.c b/src/plugins/ctf/fs-src/data-stream-file.c
index fe14f8cc3622d99fb0688ee894ff15d74d936b47..4fe807bb90791227ba0a68a8df4614a7248ac5a8 100644 (file)
--- a/src/plugins/ctf/fs-src/data-stream-file.c
+++ b/src/plugins/ctf/fs-src/data-stream-file.c
@@ -648,6 +648,13 @@ struct ctf_fs_ds_index *build_index_from_idx_file(
        }
 
        file_index_entry_size = be32toh(header->packet_index_len);
+       if (file_index_entry_size < CTF_INDEX_1_0_SIZE) {
+               BT_COMP_LOGW("Invalid `packet_index_len` in LTTng trace index file (`packet_index_len` < CTF index 1.0 index entry size): "
+                       "packet_index_len=%zu, CTF_INDEX_1_0_SIZE=%zu",
+                       file_index_entry_size, CTF_INDEX_1_0_SIZE);
+               goto error;
+       }
+
        file_entry_count = (filesize - sizeof(*header)) / file_index_entry_size;
        if ((filesize - sizeof(*header)) % file_index_entry_size) {
                BT_COMP_LOGW("Invalid LTTng trace index: the index's size after the header "