Commit 2ca4c92f authored by Alasdair G Kergon's avatar Alasdair G Kergon

dm ioctl: prevent empty message

Detect invalid empty messages in core dm instead of requiring every target to
check this.
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 13c87583
......@@ -1402,6 +1402,11 @@ static int target_message(struct dm_ioctl *param, size_t param_size)
goto out;
}
if (!argc) {
DMWARN("Empty message received.");
goto out;
}
table = dm_get_live_table(md);
if (!table)
goto out_argv;
......
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