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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-03-31 05:55:23 +0200 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2009-03-30 13:25:24 +0200 |
| commit | b7ff99ea53cd16de8f6166c0e98f19a7c6ca67ee (patch) | |
| tree | fed5a3cf8fc8061967e60b5bbf32e81f3c742822 /drivers/lguest/interrupts_and_traps.c | |
| parent | lguest: fix spurious BUG_ON() on invalid guest stack. (diff) | |
| download | linux-b7ff99ea53cd16de8f6166c0e98f19a7c6ca67ee.tar.xz linux-b7ff99ea53cd16de8f6166c0e98f19a7c6ca67ee.zip | |
lguest: wire up pte_update/pte_update_defer
Impact: intermittent guest segv/crash fix
I've been seeing random guest bad address crashes and segmentation faults:
bisect led to 4f98a2fee8 (vmscan: split LRU lists into anon & file sets),
but that's a red herring.
It turns out that lguest never hooked up the pte_update/pte_update_defer
calls, so our ptes were not always in sync. After the vmscan commit, the
bug became reproducible; now a fsck in a 64MB guest causes reproducible
pagetable corruption.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: jeremy@xensource.com
Cc: virtualization@lists.osdl.org
Cc: stable@kernel.org
Diffstat (limited to 'drivers/lguest/interrupts_and_traps.c')
0 files changed, 0 insertions, 0 deletions