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| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2014-10-01 22:58:35 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-14 08:59:51 -0800 |
| commit | 0f693a712421a8ba2b7b84d513bae72a816e7096 (patch) | |
| tree | 7331985ab9a8675928bd89eb2cc12251edb997dc /drivers | |
| parent | e851024dbf6c245c858f227a1346aa68580c1e43 (diff) | |
| download | lwn-0f693a712421a8ba2b7b84d513bae72a816e7096.tar.gz lwn-0f693a712421a8ba2b7b84d513bae72a816e7096.zip | |
dm log userspace: fix memory leak in dm_ulog_tfr_init failure path
commit 56ec16cb1e1ce46354de8511eef962a417c32c92 upstream.
If cn_add_callback() fails in dm_ulog_tfr_init(), it does not
deallocate prealloced memory but calls cn_del_callback().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-log-userspace-transfer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-log-userspace-transfer.c b/drivers/md/dm-log-userspace-transfer.c index 08d9a207259a..c69d0b787746 100644 --- a/drivers/md/dm-log-userspace-transfer.c +++ b/drivers/md/dm-log-userspace-transfer.c @@ -272,7 +272,7 @@ int dm_ulog_tfr_init(void) r = cn_add_callback(&ulog_cn_id, "dmlogusr", cn_ulog_callback); if (r) { - cn_del_callback(&ulog_cn_id); + kfree(prealloced_cn_msg); return r; } |