From 83d11973fa78be5bf0fd0e00791245e974fe4af3 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Sat, 3 Feb 2018 07:16:20 +0100 Subject: [PATCH] block/iscsi: take iscsilun->mutex in iscsi_timed_check_events() Commit d045c466d9e62b4321fadf586d024d54ddfd8bd4 ("iscsi: do not use aio_context_acquire/release") introduced iscsilun->mutex but appears to have overlooked iscsi_timed_check_events() when introducing the mutex. iscsi_service() and iscsi_set_events() must be called with iscsilun->mutex held. iscsi_timed_check_events() is invoked from the AioContext and does not take the mutex. Signed-off-by: Stefan Hajnoczi Message-Id: <20180203061621.7033-3-stefanha@redhat.com> Reviewed-by: Paolo Bonzini Signed-off-by: Paolo Bonzini --- block/iscsi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/iscsi.c b/block/iscsi.c index a4e3730a82..1924a2b58e 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -344,6 +344,8 @@ static void iscsi_timed_check_events(void *opaque) { IscsiLun *iscsilun = opaque; + qemu_mutex_lock(&iscsilun->mutex); + /* check for timed out requests */ iscsi_service(iscsilun->iscsi, 0); @@ -356,6 +358,8 @@ static void iscsi_timed_check_events(void *opaque) * to return to service once this situation changes. */ iscsi_set_events(iscsilun); + qemu_mutex_unlock(&iscsilun->mutex); + timer_mod(iscsilun->event_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL); }