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 |
|---|---|---|
| Kconfig | -rw-r--r-- | 3.4 KB |
| Makefile | -rw-r--r-- | 388 bytes |
| acl.c | -rw-r--r-- | 10.1 KB |
| acl.h | -rw-r--r-- | 1.5 KB |
| balloc.c | -rw-r--r-- | 62.0 KB |
| bitmap.c | -rw-r--r-- | 426 bytes |
| dir.c | -rw-r--r-- | 15.4 KB |
| ext3.h | -rw-r--r-- | 44.3 KB |
| ext3_jbd.c | -rw-r--r-- | 1.5 KB |
| file.c | -rw-r--r-- | 2.1 KB |
| fsync.c | -rw-r--r-- | 3.0 KB |
| hash.c | -rw-r--r-- | 4.3 KB |
| ialloc.c | -rw-r--r-- | 19.1 KB |
| inode.c | -rw-r--r-- | 105.6 KB |
| ioctl.c | -rw-r--r-- | 7.4 KB |
| namei.c | -rw-r--r-- | 68.3 KB |
| namei.h | -rw-r--r-- | 570 bytes |
| resize.c | -rw-r--r-- | 34.0 KB |
| super.c | -rw-r--r-- | 83.6 KB |
| symlink.c | -rw-r--r-- | 1.3 KB |
| xattr.c | -rw-r--r-- | 34.6 KB |
| xattr.h | -rw-r--r-- | 3.9 KB |
| xattr_security.c | -rw-r--r-- | 1.9 KB |
| xattr_trusted.c | -rw-r--r-- | 1.4 KB |
| xattr_user.c | -rw-r--r-- | 1.5 KB |
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