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dm ioctl: prevent empty message
[platform/adaptation/renesas_rcar/renesas_kernel.git]
/
drivers
/
md
/
dm-ioctl.c
diff --git
a/drivers/md/dm-ioctl.c
b/drivers/md/dm-ioctl.c
index
4cacdad
..
1622a6b
100644
(file)
--- 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;