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Issue metadata

Status: Fixed
Owner:
Last visit > 30 days ago
Closed: Jun 2016
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Unreachable code in src/wasm/asm-wasm-builder.cc

Project Member Reported by ClusterFuzz, May 4 2016

Issue description

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6437927420166144

Fuzzer: mbarbella_js_mutation
Job Type: linux_asan_d8_dbg
Platform Id: linux

Crash Type: Unreachable code
Crash Address: 
Crash State:
  src/wasm/asm-wasm-builder.cc
  
Regressed: V8: r35045:35048

Minimized Testcase (0.20 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv94BMyCciLxJeVqHhn4C6tik2wpdlkCAGElIi_zeJ4SBmyCI0RIEs0Wsz-SbByqajPuhk5ZI3tkfef162b_eMCS924xSZ89Lcd4GeHOAg5w6WDIWOYQm2XQ5c2nz0juynpDp52izeTknp6Wp-kLYkqu9CE7Jug
try {
} catch(e) {; }
  function __f_1(){
    'use asm';
    function __f_3() {
       while(4294967295);
    }
    return { __f_3: __f_3 };
  }
  var __v_9 = Wasm.instantiateModuleFromAsm(__f_1.toString());


Filer: mstarzinger

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.
 
Cc: titzer@chromium.org
Owner: bradnelson@chromium.org
Status: Assigned (was: Available)
Regression range suggests the following change.

https://chromium.googlesource.com/v8/v8/+/942ed114880b1cf1a72f9aa38d20759dd835b98e
Status: Fixed (was: Assigned)
Fixed by subsequent refactor.

Project Member

Comment 3 by ClusterFuzz, Jun 29 2016

ClusterFuzz has detected this issue as fixed in range 37353:37354.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6437927420166144

Fuzzer: mbarbella_js_mutation
Job Type: linux_asan_d8_dbg
Platform Id: linux

Crash Type: Unreachable code
Crash Address: 
Crash State:
  asm-wasm-builder.cc
  
Regressed: V8: r35045:35048
Fixed: V8: r37353:37354

Minimized Testcase (0.20 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv943MsFvq-4ucawYEDBT0BUI3B0MW0EzOBk5By-I3r5zbRs4_qqgLCKJrwifhD9miW0GqlI_0R9zdfIRrX-VjKGI50rQvTVbhQGEcgSl5OBPXpm4QDmXd0vJO7kvMFjKzS1iJ9MwfP0KGkJntqyJja4Z8n541w?testcase_id=6437927420166144
try {
} catch(e) {; }
  function __f_1(){
    'use asm';
    function __f_3() {
       while(4294967295);
    }
    return { __f_3: __f_3 };
  }
  var __v_9 = Wasm.instantiateModuleFromAsm(__f_1.toString());


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

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

Comment 4 by sheriffbot@chromium.org, Nov 22 2016

Labels: -Restrict-View-EditIssue
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

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