[app-emulation/qemu] CVE bump

app-emulation/qemu/files/qemu-2.3.0-CVE-2015-5158.patch

@@ -0,0 +1,40 @@
+commit c170aad8b057223b1139d72e5ce7acceafab4fa9
+Author: Paolo Bonzini <pbonzini@redhat.com>
+Date:   Tue Jul 21 08:59:39 2015 +0200
+
+    scsi: fix buffer overflow in scsi_req_parse_cdb (CVE-2015-5158)
+    
+    This is a guest-triggerable buffer overflow present in QEMU 2.2.0
+    and newer.  scsi_cdb_length returns -1 as an error value, but the
+    caller does not check it.
+    
+    Luckily, the massive overflow means that QEMU will just SIGSEGV,
+    making the impact much smaller.
+    
+    Reported-by: Zhu Donghai (朱东海) <donghai.zdh@alibaba-inc.com>
+    Fixes: 1894df02811f6b79ea3ffbf1084599d96f316173
+    Reviewed-by: Fam Zheng <famz@redhat.com>
+    Cc: qemu-stable@nongnu.org
+    Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+
+diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
+index f50b2f0..f0ae462 100644
+--- a/hw/scsi/scsi-bus.c
++++ b/hw/scsi/scsi-bus.c
+@@ -1239,10 +1239,15 @@ int scsi_cdb_length(uint8_t *buf) {
+ int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf)
+ {
+     int rc;
++    int len;
+ 
+     cmd->lba = -1;
+-    cmd->len = scsi_cdb_length(buf);
++    len = scsi_cdb_length(buf);
++    if (len < 0) {
++        return -1;
++    }
+ 
++    cmd->len = len;
+     switch (dev->type) {
+     case TYPE_TAPE:
+         rc = scsi_req_stream_xfer(cmd, dev, buf);