diff options
| author | Lars Ellenberg | 2010-03-03 02:25:33 +0100 |
|---|---|---|
| committer | Philipp Reisner | 2010-03-11 16:02:45 +0100 |
| commit | 4589d7f829951c1713ef5a4ad1a9bb563da329b5 (patch) | |
| tree | 96a1ef3be7118a0a0dbf6b18f609486323f062c5 /drivers/block/drbd/drbd_main.c | |
| parent | fix unit of rs_same_csums accounting (diff) | |
| download | kernel-qcow2-linux-4589d7f829951c1713ef5a4ad1a9bb563da329b5.tar.gz kernel-qcow2-linux-4589d7f829951c1713ef5a4ad1a9bb563da329b5.tar.xz kernel-qcow2-linux-4589d7f829951c1713ef5a4ad1a9bb563da329b5.zip | |
drbd_disconnect: grab meta.socket mutex as well
Fixes a race and potential kernel panic if e.g. the worker was just
about to send a few P_RS_IS_IN_SYNC via the meta socket for checksum
based resync, while the receiver destroys the sockets in
drbd_disconnect.
To make sure no-one is using the meta socket,
it is not enough to stop the asender...
Grab the meta socket mutex before destroying it.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index b2d347d18c7d..67e0fc542249 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -3173,14 +3173,18 @@ void drbd_free_bc(struct drbd_backing_dev *ldev) void drbd_free_sock(struct drbd_conf *mdev) { if (mdev->data.socket) { + mutex_lock(&mdev->data.mutex); kernel_sock_shutdown(mdev->data.socket, SHUT_RDWR); sock_release(mdev->data.socket); mdev->data.socket = NULL; + mutex_unlock(&mdev->data.mutex); } if (mdev->meta.socket) { + mutex_lock(&mdev->meta.mutex); kernel_sock_shutdown(mdev->meta.socket, SHUT_RDWR); sock_release(mdev->meta.socket); mdev->meta.socket = NULL; + mutex_unlock(&mdev->meta.mutex); } } |