Report an error when memory < hpagesize in file_ram_alloc() so callers
can handle the error.
If user adds a memory-backend-file object using object_add command,
specifying a size that is less than huge page size, qemu will core dump
with message:
Bad ram offset
fffffffffffff000
Aborted (core dumped)
This patch fixes the problem. With this patch, qemu reports error
message like:
qemu-system-x86_64: -object memory-backend-file,mem-path=/hugepages,id=mem-file0,size=1M: memory
size 0x100000 must be equal to or larger than huge page size 0x200000
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
char *filename;
char *sanitized_name;
char *c;
- void *area;
+ void *area = NULL;
int fd;
- unsigned long hpagesize;
+ uint64_t hpagesize;
hpagesize = gethugepagesize(path);
if (!hpagesize) {
}
if (memory < hpagesize) {
- return NULL;
+ error_setg(errp, "memory size 0x" RAM_ADDR_FMT " must be equal to "
+ "or larger than huge page size 0x%" PRIx64,
+ memory, hpagesize);
+ goto error;
}
if (kvm_enabled() && !kvm_has_sync_mmu()) {