This is more of the nonsense where C pretends it hasn't discovered two's complement yet and some of our constant-time code is unhappy.

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/boringssl/src/crypto/ec/p256-64.c&l=327

I suppose we could replace this with other bit tricks to shut UBSan up.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6336264160149504

Fuzzer: libfuzzer_boringssl_client_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  felem_shrink
  felem_mul
  point_add
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=386932:386961

Minimized Testcase (0.65 Kb): https://cluster-fuzz.appspot.com/download/AMIfv94xxwUYjiQrm7RCMoqsqfpQKYkeokRXxGIT41B7dpd0QFtBTROq__za6BARGLZuwRMVzWi4ycA__WADFXPOkXR73dFCIsBvddsxGGWPbk3ugZtWFfuieFjTtAXo-rIdAiryyHDI1wDYXR2mXjLN_YswyYQf-A

Filer: mmoroz

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

https://boringssl-review.googlesource.com/#/c/7740/

The following revision refers to this bug:
  https://boringssl.googlesource.com/boringssl.git/+/f13444a5ad92974005df38c4344c922af2449ca3

commit f13444a5ad92974005df38c4344c922af2449ca3
Author: David Benjamin <davidben@google.com>
Date: Mon Apr 25 17:22:22 2016

Use different bit tricks to extend the LSB.

C gets grumpy when you shift into a sign bit. Replace it with a different bit
trick.

BUG= chromium:603502 

Change-Id: Ia4cc2e2d68675528b7c0155882ff4d6230df482b
Reviewed-on: https://boringssl-review.googlesource.com/7740
Reviewed-by: Adam Langley <agl@google.com>

[modify] https://crrev.com/f13444a5ad92974005df38c4344c922af2449ca3/crypto/ec/p256-64.c

Marking this as fixed, though note that ClusterFuzz won't register it until later in the week due to DEPS roll delays.

ClusterFuzz has detected this issue as fixed in range 390114:390182.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6336264160149504

Fuzzer: libfuzzer_boringssl_client_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  felem_shrink
  felem_mul
  point_add
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=386932:386961
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=390114:390182

Minimized Testcase (0.65 Kb): https://cluster-fuzz.appspot.com/download/AMIfv94xxwUYjiQrm7RCMoqsqfpQKYkeokRXxGIT41B7dpd0QFtBTROq__za6BARGLZuwRMVzWi4ycA__WADFXPOkXR73dFCIsBvddsxGGWPbk3ugZtWFfuieFjTtAXo-rIdAiryyHDI1wDYXR2mXjLN_YswyYQf-A

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.

ClusterFuzz has detected this issue as fixed in range 390114:390182.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5717157576441856

Fuzzer: libfuzzer_boringssl_client_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  felem_shrink
  felem_square
  point_add
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=386932:386961
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=390114:390182

Minimized Testcase (0.66 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97_5N7wov2mgKbTaXigD6W_cGSbpOufbXm-s8iucUItC1QE5LeMPzgfL54z_bRfSbTiG1q5urjsqzSbNTwp4PXGpzZ2FjKIZCuqmejwo9fgjIPfLs3pJE9T0ntfDTVYlzZOi2dNbZY-UVBBGLFzbdBbNw6sjQ

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.

Removing EditIssue view restrictions from ClusterFuzz filed bugs. If you believe that this issue should still be restricted, please reapply the label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot