[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] arm: kill a guest which uses hvc with an immediate operand != XEN_HYPERCALL_TAG
# HG changeset patch # User Ian Campbell <ian.campbell@xxxxxxxxxx> # Date 1349791534 -3600 # Node ID 478830e5d80abc9678dc5287738406e73a8bd087 # Parent f91b841ff95caaaf0cb8f333f5a95f7b562cab76 arm: kill a guest which uses hvc with an immediate operand != XEN_HYPERCALL_TAG At best these guests are confused/broken and at worse they are malicious. In any case we don't know that they are expecting to handle a -errno style error. Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Committed-by: Ian Campbell <ian.campbell@xxxxxxxxxx> --- diff -r f91b841ff95c -r 478830e5d80a xen/arch/arm/traps.c --- a/xen/arch/arm/traps.c Tue Oct 09 15:05:34 2012 +0100 +++ b/xen/arch/arm/traps.c Tue Oct 09 15:05:34 2012 +0100 @@ -475,12 +475,7 @@ static void do_trap_hypercall(struct cpu #endif if ( iss != XEN_HYPERCALL_TAG ) - { - printk("%s %d: received an alien hypercall iss=%lx\n", __func__ , - __LINE__ , iss); - regs->r0 = -EINVAL; - return; - } + domain_crash_synchronous(); if ( regs->r12 >= ARRAY_SIZE(arm_hypercall_table) ) { _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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