Message ID | 1503965694-10794-62-git-send-email-mdroth@linux.vnet.ibm.com |
---|---|
State | New |
Headers | show
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Series |
Patch Round-up for stable 2.9.1, freeze on 2017-09-04
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expand
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diff --git a/block/blkdebug.c b/block/blkdebug.c index 5ccb9ce..63bc5d4 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -840,9 +840,13 @@ 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();