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device: wait for and lock ipc operations during close

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If an IPC operation is in flight while close starts, it is possible for
both processes to deadlock. Prevent this by taking the IPC lock at the
start of close and for the duration.

Signed-off-by: James Tucker <jftucker@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
James Tucker
2023-05-05 16:11:38 -07:00
committed by Jason A. Donenfeld
parent 052af4a807
commit b7cd547315
1 changed files with 2 additions and 0 deletions
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2
device/device.go
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@@ -368,6 +368,8 @@ func (device *Device) RemoveAllPeers() {
} }
func (device *Device) Close() { func (device *Device) Close() {
device.ipcMutex.Lock()
defer device.ipcMutex.Unlock()
device.state.Lock() device.state.Lock()
defer device.state.Unlock() defer device.state.Unlock()
if device.isClosed() { if device.isClosed() {