After doing a bit of research I think line 142 in file chardev/char- serial.c is problematic. https://github.com/qemu/qemu/blob/master/chardev/char-serial.c#L142
It enables output processing, which is something unwanted here. With a simple test program I found out that by default, besides OPOST, ONLCR flag is set in c_oflag. I guess fix would be removing OPOST flag, which would disable any output processing, or setting c_oflag to 0 just to be sure. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1772086 Title: malformed serial data being sent from guest Status in QEMU: New Bug description: When sending data through serial from guest each time 0x0A byte is sent 0x0D is sent before it. For example, when sending {0x29, 0x0A} on the other end I receive {0x29, 0x0D, 0x0A}. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1772086/+subscriptions
