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authorAlexander Bulekov <alxndr@bu.edu>2023-04-27 17:10:09 -0400
committerThomas Huth <thuth@redhat.com>2023-04-28 11:31:54 +0200
commitf63192b0544af5d3e4d5edfd85ab520fcf671377 (patch)
tree64eab41f7be16e93518b18c885d7e082edec4f69 /hw/usb/redirect.c
parentef56ffbdd6b0605dc1e305611287b948c970e236 (diff)
downloadfocaccia-qemu-f63192b0544af5d3e4d5edfd85ab520fcf671377.tar.gz
focaccia-qemu-f63192b0544af5d3e4d5edfd85ab520fcf671377.zip
hw: replace most qemu_bh_new calls with qemu_bh_new_guarded
This protects devices from bh->mmio reentrancy issues.

Thanks: Thomas Huth <thuth@redhat.com> for diagnosing OS X test failure.
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230427211013.2994127-5-alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'hw/usb/redirect.c')
-rw-r--r--hw/usb/redirect.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index fd7df599bc..39fbaaab16 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -1441,8 +1441,10 @@ static void usbredir_realize(USBDevice *udev, Error **errp)
         }
     }
 
-    dev->chardev_close_bh = qemu_bh_new(usbredir_chardev_close_bh, dev);
-    dev->device_reject_bh = qemu_bh_new(usbredir_device_reject_bh, dev);
+    dev->chardev_close_bh = qemu_bh_new_guarded(usbredir_chardev_close_bh, dev,
+                                                &DEVICE(dev)->mem_reentrancy_guard);
+    dev->device_reject_bh = qemu_bh_new_guarded(usbredir_device_reject_bh, dev,
+                                                &DEVICE(dev)->mem_reentrancy_guard);
     dev->attach_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, usbredir_do_attach, dev);
 
     packet_id_queue_init(&dev->cancelled, dev, "cancelled");