With today's master, 70c2525c0d3c ('IOMUX: Stop dropped consoles') introduces a use after free in usb_kbd_remove():
- usbkbd's stdio device is de-registered with stdio_deregister_dev(), the struct stdio_dev is freed.
- iomux_doenv() is called, usbkbd removed from the console list, and console_stop() is called on the struct stdio_dev pointer that no longer exists.
This series mitigates this by making sure the pointer is really a stdio device prior performing the stop operation. It's not ideal, but I couldn't figure out a nicer way to fix this.
Regards, Nicolas
---
Nicolas Saenz Julienne (2): stdio: Introduce stdio_valid() console: Don't start/stop console if stdio device invalid
common/console.c | 3 +++ common/stdio.c | 11 +++++++++++ include/stdio_dev.h | 1 + 3 files changed, 15 insertions(+)