From 1775f111eaf7f49efcec30152db44a184c1e2222 Mon Sep 17 00:00:00 2001 From: Haozhong Zhang Date: Wed, 2 Nov 2016 09:05:51 +0800 Subject: [PATCH] exec.c: check memory backend file size with 'size' option If the memory backend file is not large enough to hold the required 'size', Qemu will report error and exit. Signed-off-by: Haozhong Zhang Message-Id: <20161027042300.5929-3-haozhong.zhang@intel.com> Reviewed-by: Eduardo Habkost Message-Id: <20161102010551.2723-1-haozhong.zhang@intel.com> Signed-off-by: Paolo Bonzini --- exec.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/exec.c b/exec.c index f471e7377a..f3c2770d54 100644 --- a/exec.c +++ b/exec.c @@ -1321,6 +1321,13 @@ static void *file_ram_alloc(RAMBlock *block, goto error; } + if (file_size > 0 && file_size < memory) { + error_setg(errp, "backing store %s size 0x%" PRIx64 + " does not match 'size' option 0x" RAM_ADDR_FMT, + path, file_size, memory); + goto error; + } + memory = ROUND_UP(memory, block->page_size); /*