[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 2/3] x86/PV: relax LDT address check
There's no point placing restrictions on its address when the LDT size is zero. Also convert a local variable to a slightly more efficient type. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> --- a/xen/arch/x86/mm.c +++ b/xen/arch/x86/mm.c @@ -3348,8 +3348,8 @@ long do_mmuext_op( case MMUEXT_SET_LDT: { - unsigned long ptr = op.arg1.linear_addr; - unsigned long ents = op.arg2.nr_ents; + unsigned int ents = op.arg2.nr_ents; + unsigned long ptr = ents ? op.arg1.linear_addr : 0; if ( unlikely(d != pg_owner) ) rc = -EPERM; @@ -3361,7 +3361,7 @@ long do_mmuext_op( else if ( ((ptr & (PAGE_SIZE - 1)) != 0) || !__addr_ok(ptr) || (ents > 8192) ) { - MEM_LOG("Bad args to SET_LDT: ptr=%lx, ents=%lx", ptr, ents); + MEM_LOG("Bad args to SET_LDT: ptr=%lx, ents=%x", ptr, ents); rc = -EINVAL; } else if ( (curr->arch.pv_vcpu.ldt_ents != ents) || Attachment:
x86-mmuext-LDT-relax.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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