The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/794079041f3fb283eb888f48c0d806b5427a634a

commit 794079041f3fb283eb888f48c0d806b5427a634a
Author: mmenke <mmenke@chromium.org>
Date: Tue Nov 29 01:56:02 2016

Use overflow-safe string-to-int parsing methods for FTP ports.

BUG= 667779 , 667797 

Review-Url: https://codereview.chromium.org/2539583002
Cr-Commit-Position: refs/heads/master@{#434826}

[modify] https://crrev.com/794079041f3fb283eb888f48c0d806b5427a634a/net/ftp/ftp_network_transaction.cc
[modify] https://crrev.com/794079041f3fb283eb888f48c0d806b5427a634a/net/ftp/ftp_network_transaction_unittest.cc

ClusterFuzz has detected this issue as fixed in range 434798:434881.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6249982303928320

Fuzzer: libfuzzer_net_url_request_ftp_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  net::ExtractPortFromEPSVResponse
  net::FtpNetworkTransaction::ProcessResponseEPSV
  net::FtpNetworkTransaction::ProcessCtrlResponse
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=433614:433692
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=434798:434881

Minimized Testcase (0.26 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv97zJ8gPyy4k2uRaKqHRKCk62sfai4Ykmj7sLH8VGVIu-9HneJPccdU8hsl4l_RyZZn01X8V-t0fnJ7QxYYPpjbWm8mKOKJnYc-mZ_VsRLXypQ8px1qZ9Abt72INm9aj49EYyHCdNU6LXve0jfm5-zQ72AgpVQ?testcase_id=6249982303928320
spam.txt\
230 Hello
\ 215 UNIX
\ 230 Welcome
\ 257 "/" is your current location
\ 200 TYPE set successfully
\ 213 5
\ 550 Not a directory
\ 227 227 Entering Extended Passive Mode (|||45575374463219|)
\ I lied about the content size.\ \ 
11111111111111111
1


See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.