diff options
| author | Alasdair G Kergon <agk@redhat.com> | 2011-08-02 12:32:03 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2011-08-02 12:32:03 +0100 |
| commit | 2ca4c92f58f9386e080b26f9ccd78c9ca5825a42 (patch) | |
| tree | 638f6e97f829cdf8cfc090dabff9213dc50db149 /drivers/md/dm-ioctl.c | |
| parent | 13c87583ea4e867211fc3e7edab750c353c47c95 (diff) | |
| download | linux-3.10-2ca4c92f58f9386e080b26f9ccd78c9ca5825a42.tar.gz linux-3.10-2ca4c92f58f9386e080b26f9ccd78c9ca5825a42.tar.bz2 linux-3.10-2ca4c92f58f9386e080b26f9ccd78c9ca5825a42.zip | |
dm ioctl: prevent empty message
Detect invalid empty messages in core dm instead of requiring every target to
check this.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-ioctl.c')
| -rw-r--r-- | drivers/md/dm-ioctl.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index 4cacdad2270..1622a6bc0bf 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -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; |