[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen stable-4.9] x86/vmx: Avoid hitting BUG_ON() after EPTP-related domain_crash()
commit 5bb24b27924ba2b339cc79f57f224a4bf5c74313 Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> AuthorDate: Fri Sep 14 13:26:38 2018 +0200 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Fri Sep 14 13:26:38 2018 +0200 x86/vmx: Avoid hitting BUG_ON() after EPTP-related domain_crash() If the EPTP pointer can't be located in the altp2m list, the domain is (legitimately) crashed. Under those circumstances, execution will continue and guarentee to hit the BUG_ON(idx >= MAX_ALTP2M) (unfortunately, just out of context). Return from vmx_vmexit_handler() after the domain_crash(), which also has the side effect of reentering the scheduler more promptly. Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Reviewed-by: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx> Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx> master commit: 48dbb2dbe9d9f92a2890a15bb48a0598c065b9f8 master date: 2018-08-02 10:10:43 +0100 --- xen/arch/x86/hvm/vmx/vmx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c index 7e509b0392..78f16546a5 100644 --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -3696,6 +3696,8 @@ void vmx_vmexit_handler(struct cpu_user_regs *regs) { gdprintk(XENLOG_ERR, "EPTP not found in alternate p2m list\n"); domain_crash(v->domain); + + return; } } -- generated by git-patchbot for /home/xen/git/xen.git#stable-4.9 _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/xen-changelog
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