diff options
| author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2015-09-15 16:55:10 +0200 |
|---|---|---|
| committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2015-10-24 18:02:48 +0200 |
| commit | 61ea2d8648d32b8e84da62f142dc08fa9ee5b7b9 (patch) | |
| tree | b8524c038de9c30f1d2a7737f1a228576eb8f55f /hw/misc | |
| parent | 03977ad552874f6598a8f0ef3089e6846ba01a2b (diff) | |
ivshmem: limit maximum number of peers to G_MAXUINT16
Limit the maximum number of peers to MAXUINT16. This is more realistic
and better matches the limit of the doorbell register.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
Diffstat (limited to 'hw/misc')
| -rw-r--r-- | hw/misc/ivshmem.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c index e7224b9528..3787398c19 100644 --- a/hw/misc/ivshmem.c +++ b/hw/misc/ivshmem.c @@ -34,6 +34,7 @@ #define PCI_VENDOR_ID_IVSHMEM PCI_VENDOR_ID_REDHAT_QUMRANET #define PCI_DEVICE_ID_IVSHMEM 0x1110 +#define IVSHMEM_MAX_PEERS G_MAXUINT16 #define IVSHMEM_IOEVENTFD 0 #define IVSHMEM_MSI 1 @@ -421,8 +422,8 @@ static int increase_dynamic_storage(IVShmemState *s, int new_min_size) int j, old_nb_alloc; - /* check for integer overflow */ - if (new_min_size >= INT_MAX / sizeof(Peer) - 1 || new_min_size <= 0) { + /* limit number of max peers */ + if (new_min_size <= 0 || new_min_size > IVSHMEM_MAX_PEERS) { return -1; } |