Cherry picking usrsctp use-after-free write bug fix.

Commit log:
https://chromium.googlesource.com/external/github.com/sctplab/usrsctp/+log/995c0b844144..2c26785bed47

Bug: chromium:1163228
Change-Id: Ic5f5783afd359036e154e1f08da60a75afebb5ff
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2613956Reviewed-by: Harald Alvestrand <hta@chromium.org>
Commit-Queue: Harald Alvestrand <hta@chromium.org>
Auto-Submit: Taylor <deadbeef@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840988}

DEPS

@@ -1483,7 +1483,7 @@ deps = {
   },
 
   'src/third_party/usrsctp/usrsctplib':
-    Var('chromium_git') + '/external/github.com/sctplab/usrsctp' + '@' + '995c0b84414466d77d52011e5b572cbe213b770a',
+    Var('chromium_git') + '/external/github.com/sctplab/usrsctp' + '@' + '2c26785bed47cf18e127c516ab242b4e3781ed20',
 
   'src/third_party/vulkan-deps': '{chromium_git}/vulkan-deps@5f87855f34ce9c2eddf7fabb0a0e7df3b7ba350a',
 

third_party/usrsctp/README.chromium

@@ -19,3 +19,6 @@ as well as updates and enhancements from the following Internet Drafts:
    draft-stewart-prsctp-00.txt
    draft-stewart-tsvwg-sctpipv6-00.txt
    draft-iyengar-sctp-cacc-00.txt
+
+Local Modifications:
+Cherry picked d844a690d30ace22de75e8b80d9bb08ae7283795
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