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由 Stefan Weil 提交于
qemu-system-arm (and other system emulations) crashes with SDL when the user switches consoles (Alt-Ctrl-F4). We already check for NULL pointers in qemu_chr_fe_ioctl, qemu_chr_be_can_write and other functions, so do this also for s->chr_read in qemu_chr_be_write. This fixes the crash. Signed-off-by: NStefan Weil <sw@weilnetz.de> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
ac310734