Merge remote-tracking branch 'remotes/kraxel/tags/usb-20200921-pull-request' into staging

usb: fix u2f build
usb: fix ohci oob access and loop issues

# gpg: Signature made Mon 21 Sep 2020 09:58:06 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/usb-20200921-pull-request:
  hw: usb: hcd-ohci: check for processed TD before retire
  hw: usb: hcd-ohci: check len and frame_number variables
  usb: fix u2f build

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 28 insertions, 4 deletions

diff --git a/hw/usb/hcd-ohci.c b/hw/usb/hcd-ohci.c
index 1e6e85e..8b912e9 100644
--- a/hw/usb/hcd-ohci.c
+++ b/hw/usb/hcd-ohci.c
@@ -691,6 +691,10 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
            the next ISO TD of the same ED */
         trace_usb_ohci_iso_td_relative_frame_number_big(relative_frame_number,
                                                         frame_count);
+        if (OHCI_CC_DATAOVERRUN == OHCI_BM(iso_td.flags, TD_CC)) {
+            /* avoid infinite loop */
+            return 1;
+        }
         OHCI_SET_BM(iso_td.flags, TD_CC, OHCI_CC_DATAOVERRUN);
         ed->head &= ~OHCI_DPTR_MASK;
         ed->head |= (iso_td.next & OHCI_DPTR_MASK);
@@ -731,7 +735,11 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
     }
 
     start_offset = iso_td.offset[relative_frame_number];
-    next_offset = iso_td.offset[relative_frame_number + 1];
+    if (relative_frame_number < frame_count) {
+        next_offset = iso_td.offset[relative_frame_number + 1];
+    } else {
+        next_offset = iso_td.be;
+    }
 
     if (!(OHCI_BM(start_offset, TD_PSW_CC) & 0xe) || 
         ((relative_frame_number < frame_count) && 
@@ -764,7 +772,12 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
         }
     } else {
         /* Last packet in the ISO TD */
-        end_addr = iso_td.be;
+        end_addr = next_offset;
+    }
+
+    if (start_addr > end_addr) {
+        trace_usb_ohci_iso_td_bad_cc_overrun(start_addr, end_addr);
+        return 1;
     }
 
     if ((start_addr & OHCI_PAGE_MASK) != (end_addr & OHCI_PAGE_MASK)) {
@@ -773,6 +786,9 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
     } else {
         len = end_addr - start_addr + 1;
     }
+    if (len > sizeof(ohci->usb_buf)) {
+        len = sizeof(ohci->usb_buf);
+    }
 
     if (len && dir != OHCI_TD_DIR_IN) {
         if (ohci_copy_iso_td(ohci, start_addr, end_addr, ohci->usb_buf, len,
@@ -975,8 +991,16 @@ static int ohci_service_td(OHCIState *ohci, struct ohci_ed *ed)
         if ((td.cbp & 0xfffff000) != (td.be & 0xfffff000)) {
             len = (td.be & 0xfff) + 0x1001 - (td.cbp & 0xfff);
         } else {
+            if (td.cbp > td.be) {
+                trace_usb_ohci_iso_td_bad_cc_overrun(td.cbp, td.be);
+                ohci_die(ohci);
+                return 1;
+            }
             len = (td.be - td.cbp) + 1;
         }
+        if (len > sizeof(ohci->usb_buf)) {
+            len = sizeof(ohci->usb_buf);
+        }
 
         pktlen = len;
         if (len && dir != OHCI_TD_DIR_IN) {
diff --git a/hw/usb/u2f-emulated.c b/hw/usb/u2f-emulated.c
index 9e1b829..9151feb 100644
--- a/hw/usb/u2f-emulated.c
+++ b/hw/usb/u2f-emulated.c
@@ -200,7 +200,7 @@ static ssize_t u2f_emulated_read(const char *path, char *buffer,
     int fd;
     ssize_t ret;
 
-    fd = qemu_open(path, O_RDONLY);
+    fd = qemu_open_old(path, O_RDONLY);
     if (fd < 0) {
         return -1;
     }
@@ -217,7 +217,7 @@ static bool u2f_emulated_setup_counter(const char *path,
     int fd, ret;
     FILE *fp;
 
-    fd = qemu_open(path, O_RDWR);
+    fd = qemu_open_old(path, O_RDWR);
     if (fd < 0) {
         return false;
     }