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Subject[ 85/95] dm ioctl: do not leak argv if target message only contains whitespace
3.2-stable review patch.  If anyone has any objections, please let me know.


From: Jesper Juhl <>

commit 902c6a96a7cb9c50d2a8aed1788efad0a5d8f04c upstream.

If 'argc' is zero we jump to the 'out:' label, but this leaks the
(unused) memory that 'dm_split_args()' allocated for 'argv' if the
string being split consisted entirely of whitespace. Jump to the
'out_argv:' label instead to free up that memory.

Signed-off-by: Jesper Juhl <>
Signed-off-by: Alasdair G Kergon <>
Signed-off-by: Greg Kroah-Hartman <>

drivers/md/dm-ioctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1437,7 +1437,7 @@ static int target_message(struct dm_ioct

if (!argc) {
DMWARN("Empty message received.");
- goto out;
+ goto out_argv;

table = dm_get_live_table(md);

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