Amit Shah <amit.shah@xxxxxxxxxx> writes: > When multiple ovq operations are being performed (lots of open/close > operations on virtio_console fds), the __send_control_msg() function can > get confused without locking. > > A simple recipe to cause badness is: > * create a QEMU VM with two virtio-serial ports > * in the guest, do > while true;do echo abc >/dev/vport0p1;done > while true;do echo edf >/dev/vport0p2;done > > In one run, this caused a panic in __send_control_msg(). In another, I > got > > virtio_console virtio0: control-o:id 0 is not a head! Both applied to my fixes branch, with CC: stable added. For future reference, I prefer you to put the CC: stable@xxxxxxxxxx tag in if you think it's a stable candidate. Thanks, Rusty. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
