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Diffstat (limited to 'block/blkdebug.c')
-rw-r--r--block/blkdebug.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/block/blkdebug.c b/block/blkdebug.c
index 6431962..a1b24b9 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -839,9 +839,13 @@ static void blkdebug_refresh_filename(BlockDriverState *bs, QDict *options)
}
if (!force_json && bs->file->bs->exact_filename[0]) {
- snprintf(bs->exact_filename, sizeof(bs->exact_filename),
- "blkdebug:%s:%s", s->config_file ?: "",
- bs->file->bs->exact_filename);
+ int ret = snprintf(bs->exact_filename, sizeof(bs->exact_filename),
+ "blkdebug:%s:%s", s->config_file ?: "",
+ bs->file->bs->exact_filename);
+ if (ret >= sizeof(bs->exact_filename)) {
+ /* An overflow makes the filename unusable, so do not report any */
+ bs->exact_filename[0] = 0;
+ }
}
opts = qdict_new();