Revision c300aa64ddf57d9c5d9c898a64b36877345dd4a9 authored by Andy Honig on 11 March 2013, 16:34:52 UTC, committed by Marcelo Tosatti on 19 March 2013, 17:17:31 UTC
If the guest sets the GPA of the time_page so that the request to update the time straddles a page then KVM will write onto an incorrect page. The write is done byusing kmap atomic to get a pointer to the page for the time structure and then performing a memcpy to that page starting at an offset that the guest controls. Well behaved guests always provide a 32-byte aligned address, however a malicious guest could use this to corrupt host kernel memory. Tested: Tested against kvmclock unit test. Signed-off-by: Andrew Honig <ahonig@google.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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File | Mode | Size |
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Kconfig | -rw-r--r-- | 1.8 KB |
Makefile | -rw-r--r-- | 198 bytes |
internal.h | -rw-r--r-- | 1.3 KB |
mmap-nommu.c | -rw-r--r-- | 2.2 KB |
storage.c | -rw-r--r-- | 6.4 KB |
super.c | -rw-r--r-- | 15.1 KB |
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