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drbd: abort drbd_start_resync if there is no connection

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This was found by a static analysis tool. While highly unlikely, be sure
to return without dereferencing the NULL pointer.

Reported-by: Shaobo <shaobo@cs.utah.edu>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Roland Kammerer 2017-08-29 10:20:47 +02:00 committed by Jens Axboe
parent 183ece3005
commit d3d2948f43
1 changed files with 5 additions and 0 deletions
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5
drivers/block/drbd/drbd_worker.c
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@ -1756,6 +1756,11 @@ void drbd_start_resync(struct drbd_device *device, enum drbd_conns side)
return;
}
if (!connection) {
drbd_err(device, "No connection to peer, aborting!\n");
return;
}
if (!test_bit(B_RS_H_DONE, &device->flags)) {
if (side == C_SYNC_TARGET) {
/* Since application IO was locked out during C_WF_BITMAP_T and