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ivshmem: check shm isn't already initialized

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The server should not change the shm, and this isn't handled by qemu and
we should should verify this in qemu.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
This commit is contained in:
Marc-André Lureau 2015-06-23 12:55:41 +02:00
parent 86d471bfa4
commit 945001a1af
1 changed files with 6 additions and 0 deletions
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6
hw/misc/ivshmem.c
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@ -533,6 +533,12 @@ static void ivshmem_read(void *opaque, const uint8_t *buf, int size)
if (incoming_posn == -1) {
void * map_ptr;
if (s->shm_fd >= 0) {
error_report("shm already initialized");
close(incoming_fd);
return;
}
if (check_shm_size(s, incoming_fd, &err) == -1) {
error_report_err(err);
close(incoming_fd);