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Diffstat (limited to 'drivers/lguest/core.c')
| -rw-r--r-- | drivers/lguest/core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c index 0a46e8837d9..4a315f08a56 100644 --- a/drivers/lguest/core.c +++ b/drivers/lguest/core.c @@ -453,6 +453,11 @@ static void run_guest_once(struct lguest *lg, struct lguest_pages *pages) * lguest_pages". */ copy_in_guest_info(lg, pages); + /* Set the trap number to 256 (impossible value). If we fault while + * switching to the Guest (bad segment registers or bug), this will + * cause us to abort the Guest. */ + lg->regs->trapnum = 256; + /* Now: we push the "eflags" register on the stack, then do an "lcall". * This is how we change from using the kernel code segment to using * the dedicated lguest code segment, as well as jumping into the |