exynos4210_uart.c: SIGSEGV when loadvm

Host environment

• Operating system: macOS 11.6
• OS/kernel version: (For POSIX hosts, use uname -a) Darwin hostname 20.6.0 Darwin Kernel Version 20.6.0: Mon Aug 30 06:12:20 PDT 2021; root:xnu-7195.141.6~3/RELEASE_ARM64_T8101 arm64
• Architecture: (x86, ARM, s390x, etc.): ARM64
• QEMU flavor: (qemu-system-x86_64, qemu-aarch64, qemu-img, etc.): qemu-system-aarch64
• QEMU version: (e.g. qemu-system-x86_64 --version): v6.1.0
• QEMU command line:

Emulated/Virtualized environment

• Operating system: (Windows 10 21H1, Fedora 34, etc.)
• OS/kernel version: (For POSIX guests, use uname -a.)
• Architecture: (x86, ARM, s390x, etc.) ARM64

Description of problem

Line 619 of hw/char/exynos4210_uart.c cast the object incorrectly.

The function will be called with Exynos4210UartFIFO as opaque because it is set as vmstate_exynos4210_uart_fifo.post_load

Patch suggestion

Line 619 should be changed to

Exynos4210UartState *s = container_of(opaque, Exynos4210UartState, rx);

or set vmstate_exynos4210_uart.post_load to exynos4210_uart_post_load instead of setting vmstate_exynos4210_uart_fifo.post_load

Steps to reproduce

1. Create a VM with exynos4210_uart
2. savevm
3. loadvm

Additional information