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-- | 1.1 KB |
| Makefile | -rw-r--r-- | 240 bytes |
| alloc.c | -rw-r--r-- | 21.2 KB |
| alloc.h | -rw-r--r-- | 3.8 KB |
| bmap.c | -rw-r--r-- | 14.4 KB |
| bmap.h | -rw-r--r-- | 8.2 KB |
| btnode.c | -rw-r--r-- | 7.7 KB |
| btnode.h | -rw-r--r-- | 2.0 KB |
| btree.c | -rw-r--r-- | 60.0 KB |
| btree.h | -rw-r--r-- | 2.7 KB |
| cpfile.c | -rw-r--r-- | 24.5 KB |
| cpfile.h | -rw-r--r-- | 1.7 KB |
| dat.c | -rw-r--r-- | 13.2 KB |
| dat.h | -rw-r--r-- | 2.3 KB |
| dir.c | -rw-r--r-- | 17.4 KB |
| direct.c | -rw-r--r-- | 8.9 KB |
| direct.h | -rw-r--r-- | 1.5 KB |
| export.h | -rw-r--r-- | 482 bytes |
| file.c | -rw-r--r-- | 4.6 KB |
| gcinode.c | -rw-r--r-- | 5.6 KB |
| ifile.c | -rw-r--r-- | 5.4 KB |
| ifile.h | -rw-r--r-- | 1.8 KB |
| inode.c | -rw-r--r-- | 28.5 KB |
| ioctl.c | -rw-r--r-- | 21.3 KB |
| mdt.c | -rw-r--r-- | 14.4 KB |
| mdt.h | -rw-r--r-- | 4.0 KB |
| namei.c | -rw-r--r-- | 13.0 KB |
| nilfs.h | -rw-r--r-- | 11.7 KB |
| page.c | -rw-r--r-- | 13.7 KB |
| page.h | -rw-r--r-- | 2.6 KB |
| recovery.c | -rw-r--r-- | 24.4 KB |
| segbuf.c | -rw-r--r-- | 13.8 KB |
| segbuf.h | -rw-r--r-- | 6.2 KB |
| segment.c | -rw-r--r-- | 71.2 KB |
| segment.h | -rw-r--r-- | 8.1 KB |
| sufile.c | -rw-r--r-- | 24.6 KB |
| sufile.h | -rw-r--r-- | 4.8 KB |
| super.c | -rw-r--r-- | 35.6 KB |
| the_nilfs.c | -rw-r--r-- | 20.5 KB |
| the_nilfs.h | -rw-r--r-- | 10.8 KB |
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