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[PATCH v7 0/7] fuzz: improve crash case minimization

From: Qiuhao Li
Subject: [PATCH v7 0/7] fuzz: improve crash case minimization
Date: Sun, 10 Jan 2021 21:08:42 +0800

Extend and refine the crash case minimization process.

Test input:
  Bug 1909261 full_reproducer
  6500 QTest instructions (write mostly)

Refined (-M1 minimization level) vs. Original version:
  real  38m31.942s  <-- real  532m57.192s
  user  28m18.188s  <-- user  89m0.536s
  sys   12m42.239s  <-- sys   50m33.074s
  2558 instructions <-- 2846 instructions

Test Enviroment:
  i7-8550U, 16GB LPDDR3, SSD 
  Ubuntu 20.04.1 5.4.0-58-generic x86_64
  Python 3.8.5

  Fix: [PATCH v6 1/7] get stuck in crash detection

  Fix: add Reviewed-by and Tested-by tags

  Fix: send SIGKILL on timeout
  Fix: rename minimization functions

  Fix: messy diff in [PATCH v3 4/7]

  Fix: checkpatch.pl errors

  New: [PATCH v2 1/7]
  New: [PATCH v2 2/7]
  New: [PATCH v2 4/7]
  New: [PATCH v2 6/7]
  New: [PATCH v2 7/7]
  Fix: [PATCH 2/4] split using binary approach
  Fix: [PATCH 3/4] typo in comments
  Discard: [PATCH 1/4] the hardcoded regex match for crash detection
  Discard: [PATCH 4/4] the delaying minimizer
Thanks for the suggestions from:
  Alexander Bulekov

Qiuhao Li (7):
  fuzz: accelerate non-crash detection
  fuzz: double the IOs to remove for every loop
  fuzz: split write operand using binary approach
  fuzz: remove IO commands iteratively
  fuzz: set bits in operand of write/out to zero
  fuzz: add minimization options
  fuzz: heuristic split write based on past IOs

 scripts/oss-fuzz/minimize_qtest_trace.py | 261 +++++++++++++++++++----
 1 file changed, 214 insertions(+), 47 deletions(-)


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