memory: fix segv on qemu_ram_free(block=0x0)
Since f1060c55, the pointer is directly passed to qemu_ram_free(). However, on initialization failure, it may be called with a NULL pointer. Return immediately in this case. This fixes a SEGV when memory initialization failed, for example permission denied on open backing store /dev/hugepages, with -object memory-backend-file,mem-path=/dev/hugepages. Program received signal SIGSEGV, Segmentation fault. 0x00005555556e67e7 in qemu_ram_free (block=0x0) at /home/elmarco/src/qemu/exec.c:1775 Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1459250451-29984-1-git-send-email-marcandre.lureau@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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