CVE-2021-3682.patch 1.5 KB

1234567891011121314151617181920212223242526272829303132333435363738394041
  1. From 5e796671e6b8d5de4b0b423dce1b3eba144a92c9 Mon Sep 17 00:00:00 2001
  2. From: Gerd Hoffmann <kraxel@redhat.com>
  3. Date: Thu, 22 Jul 2021 09:27:56 +0200
  4. Subject: [PATCH] usbredir: fix free call
  5. MIME-Version: 1.0
  6. Content-Type: text/plain; charset=UTF-8
  7. Content-Transfer-Encoding: 8bit
  8. data might point into the middle of a larger buffer, there is a separate
  9. free_on_destroy pointer passed into bufp_alloc() to handle that. It is
  10. only used in the normal workflow though, not when dropping packets due
  11. to the queue being full. Fix that.
  12. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/491
  13. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
  14. Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
  15. Message-Id: <20210722072756.647673-1-kraxel@redhat.com>
  16. CVE: CVE-2021-3682
  17. Upstream-Status: Backport [5e796671e6b8d5de4b0b423dce1b3eba144a92c9]
  18. Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
  19. ---
  20. hw/usb/redirect.c | 2 +-
  21. 1 file changed, 1 insertion(+), 1 deletion(-)
  22. diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
  23. index 4ec9326e05..1ec909a63a 100644
  24. --- a/hw/usb/redirect.c
  25. +++ b/hw/usb/redirect.c
  26. @@ -476,7 +476,7 @@ static int bufp_alloc(USBRedirDevice *dev, uint8_t *data, uint16_t len,
  27. if (dev->endpoint[EP2I(ep)].bufpq_dropping_packets) {
  28. if (dev->endpoint[EP2I(ep)].bufpq_size >
  29. dev->endpoint[EP2I(ep)].bufpq_target_size) {
  30. - free(data);
  31. + free(free_on_destroy);
  32. return -1;
  33. }
  34. dev->endpoint[EP2I(ep)].bufpq_dropping_packets = 0;
  35. --
  36. 2.25.1