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vmm: memory_manager: Mark guest memory mappings as non-dumpable
Including the guest RAM (or other mapped memory) in a coredump is not useful. See: #5014 Signed-off-by: Rob Bradford <robert.bradford@intel.com>
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2b92a2778b
commit
795f2a5558
@ -1580,6 +1580,20 @@ impl MemoryManager {
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.create_user_memory_region(mem_region)
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.create_user_memory_region(mem_region)
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.map_err(Error::CreateUserMemoryRegion)?;
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.map_err(Error::CreateUserMemoryRegion)?;
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// SAFETY: the address and size are valid since the
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// mmap succeeded.
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let ret = unsafe {
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libc::madvise(
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userspace_addr as *mut libc::c_void,
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memory_size as libc::size_t,
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libc::MADV_DONTDUMP,
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)
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};
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if ret != 0 {
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let e = io::Error::last_os_error();
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warn!("Failed to mark mappin as MADV_DONTDUMP: {}", e);
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}
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// Mark the pages as mergeable if explicitly asked for.
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// Mark the pages as mergeable if explicitly asked for.
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if mergeable {
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if mergeable {
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// SAFETY: the address and size are valid since the
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// SAFETY: the address and size are valid since the
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