diff options
| author | Avi Kivity <avi@qumranet.com> | 2007-03-09 13:04:31 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-03-18 10:49:09 +0200 |
| commit | 27aba76615eeb36af84118e8ea6d35ffa51fd1e3 (patch) | |
| tree | 8bd933f47eb91818c2e24cb10a4d820f0abea74e /sound/pci/ac97/ac97_patch.c | |
| parent | ac1b714e78c8f0b252f8d8872e6ce6f898a123b3 (diff) | |
KVM: MMU: Fix host memory corruption on i386 with >= 4GB ram
PAGE_MASK is an unsigned long, so using it to mask physical addresses on
i386 (which are 64-bit wide) leads to truncation. This can result in
page->private of unrelated memory pages being modified, with disasterous
results.
Fix by not using PAGE_MASK for physical addresses; instead calculate
the correct value directly from PAGE_SIZE. Also fix a similar BUG_ON().
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'sound/pci/ac97/ac97_patch.c')
0 files changed, 0 insertions, 0 deletions