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>
1 parent c09664b
| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 1.8 KB |
| Makefile | -rw-r--r-- | 273 bytes |
| acl.c | -rw-r--r-- | 9.5 KB |
| acl.h | -rw-r--r-- | 1.2 KB |
| checkpoint.c | -rw-r--r-- | 19.8 KB |
| data.c | -rw-r--r-- | 17.1 KB |
| debug.c | -rw-r--r-- | 11.3 KB |
| dir.c | -rw-r--r-- | 16.4 KB |
| f2fs.h | -rw-r--r-- | 33.1 KB |
| file.c | -rw-r--r-- | 15.3 KB |
| gc.c | -rw-r--r-- | 16.7 KB |
| gc.h | -rw-r--r-- | 2.6 KB |
| hash.c | -rw-r--r-- | 2.0 KB |
| inode.c | -rw-r--r-- | 7.1 KB |
| namei.c | -rw-r--r-- | 11.0 KB |
| node.c | -rw-r--r-- | 40.8 KB |
| node.h | -rw-r--r-- | 9.9 KB |
| recovery.c | -rw-r--r-- | 9.0 KB |
| segment.c | -rw-r--r-- | 46.3 KB |
| segment.h | -rw-r--r-- | 18.5 KB |
| super.c | -rw-r--r-- | 17.9 KB |
| xattr.c | -rw-r--r-- | 10.6 KB |
| xattr.h | -rw-r--r-- | 4.3 KB |
Computing file changes ...
