From 78da0c2a7a9c621ba64e515528e11e5f28f15050 Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Mon, 20 Feb 2017 16:53:27 +0000 Subject: [PATCH] libxc: don't pass uninitialized data to do_dm_op() do_dm_op() expects (void *, size_t) pairs, but with nr being uint32_t the type of the expression of xc_hvm_track_dirty_vram()'s last argument to the function is only a 32 bits one. Neither C nor the ABI require the compiler to promote the type beyond int. Signed-off-by: Jan Beulich Acked-by: Wei Liu --- tools/libxc/xc_misc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/libxc/xc_misc.c b/tools/libxc/xc_misc.c index 0fc6c22a2e..5159475b29 100644 --- a/tools/libxc/xc_misc.c +++ b/tools/libxc/xc_misc.c @@ -560,7 +560,7 @@ int xc_hvm_track_dirty_vram( data->nr = nr; return do_dm_op(xch, dom, 2, &op, sizeof(op), - dirty_bitmap, (nr + 7) / 8); + dirty_bitmap, (size_t)((nr + 7) / 8)); } int xc_hvm_modified_memory( -- 2.30.2