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Issue metadata

Status: Verified
Owner: ----
Closed: Mar 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Regression



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Stack-overflow in xmlParseMarkupDecl

Project Member Reported by ClusterFuzz, Jan 9 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5075577299271680

Fuzzer: libFuzzer_libxml_xml_read_memory_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: Stack-overflow
Crash Address: 0x7fff20589d98
Crash State:
  xmlParseMarkupDecl
  xmlParseConditionalSections
  xmlParseConditionalSections
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=395614:395804

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5075577299271680

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jan 9 2018

Components: Blink>XML
Labels: Test-Predator-Auto-Components
Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.
Cc: joelhockey@chromium.org brajkumar@chromium.org
Labels: -Type-Bug M-64 Test-Predator-Wrong CF-NeedsTriage Type-Bug-Regression
Unable to find actual suspect through code search and also from the provided CL, hence marking it as untriaged.

Note: Observing some recent changes for the below file 'parser.c', so cc'ing to @joelhockey for more updates on this issue.

https://chromium.googlesource.com/chromium/src/+/1932201570802d524f80c5055644bfaac65a5a86

Thanks!
This fuzzer error wouldn't be caused by any recent CL.  It is likely a problem which has always existed which is just now being uncovered by the fuzzer.

Curiously, I can only replicate this error with debug turned on.

I have now moved off chromium/libxml, so I wont be able to investigate further.
Project Member

Comment 4 by ClusterFuzz, Mar 28 2018

ClusterFuzz has detected this issue as fixed in range 546214:546271.

Detailed report: https://clusterfuzz.com/testcase?key=5075577299271680

Fuzzer: libFuzzer_libxml_xml_read_memory_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: Stack-overflow
Crash Address: 0x7fff20589d98
Crash State:
  xmlParseMarkupDecl
  xmlParseConditionalSections
  xmlParseConditionalSections
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=395614:395804
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=546214:546271

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5075577299271680

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.md 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 5 by ClusterFuzz, Mar 28 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Untriaged)
ClusterFuzz testcase 5075577299271680 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.

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