linux-kernel - [PATCH v4 5/5] Development scripts for crash triage and deploy

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Message-ID: <20190628092621.17823-6-samcacc@amazon.de>
Date:   Fri, 28 Jun 2019 11:26:21 +0200
From:   Sam Caccavale <samcacc@...zon.de>
To:     unlisted-recipients:; (no To-header on input)
CC:     <samcaccavale@...il.com>, <nmanthey@...zon.de>,
        <wipawel@...zon.de>, <dwmw@...zon.co.uk>, <mpohlack@...zon.de>,
        <graf@...zon.de>, <karahmed@...zon.de>,
        <andrew.cooper3@...rix.com>, <JBeulich@...e.com>,
        <pbonzini@...hat.com>, <rkrcmar@...hat.com>, <tglx@...utronix.de>,
        <mingo@...hat.com>, <bp@...en8.de>, <hpa@...or.com>,
        <paullangton4@...il.com>, <x86@...nel.org>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Sam Caccavale <samcacc@...zon.de>
Subject: [PATCH v4 5/5] Development scripts for crash triage and deploy

Not meant for upstream consumption.

---

v2 -> v3:
 - Introduced this patch as a place for non-essential dev scripts

v3 -> v4:
 - Made deploy_remote.sh use a 1d timeout
 - Removed core dump setup from install_afl.sh
 - Added core dump setup into deploy_remote.sh

Signed-off-by: Sam Caccavale <samcacc@...zon.de>
---
 tools/fuzz/x86ie/scripts/bin.sh               | 49 +++++++++++++++++++
 tools/fuzz/x86ie/scripts/coalesce.sh          |  5 ++
 tools/fuzz/x86ie/scripts/deploy.sh            |  9 ++++
 tools/fuzz/x86ie/scripts/deploy_remote.sh     | 10 ++++
 tools/fuzz/x86ie/scripts/gen_output.sh        | 11 +++++
 tools/fuzz/x86ie/scripts/install_afl.sh       |  2 -
 .../fuzz/x86ie/scripts/install_deps_ubuntu.sh |  5 ++
 tools/fuzz/x86ie/scripts/rebuild.sh           |  6 +++
 tools/fuzz/x86ie/scripts/summarize.sh         |  9 ++++
 9 files changed, 104 insertions(+), 2 deletions(-)
 create mode 100755 tools/fuzz/x86ie/scripts/bin.sh
 create mode 100755 tools/fuzz/x86ie/scripts/coalesce.sh
 create mode 100644 tools/fuzz/x86ie/scripts/deploy.sh
 create mode 100755 tools/fuzz/x86ie/scripts/deploy_remote.sh
 create mode 100755 tools/fuzz/x86ie/scripts/gen_output.sh
 create mode 100755 tools/fuzz/x86ie/scripts/install_deps_ubuntu.sh
 create mode 100755 tools/fuzz/x86ie/scripts/rebuild.sh
 create mode 100755 tools/fuzz/x86ie/scripts/summarize.sh

diff --git a/tools/fuzz/x86ie/scripts/bin.sh b/tools/fuzz/x86ie/scripts/bin.sh
new file mode 100755
index 000000000000..6383a883ff33
--- /dev/null
+++ b/tools/fuzz/x86ie/scripts/bin.sh
@@ -0,0 +1,49 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+
+if [ "$#" -lt 3 ]; then
+  echo "Usage: './bin path/to/afl-harness path/to/afl_crash [path/to/linux/src/root]'"
+  exit
+fi
+
+export AFL_HARNESS="$1"
+export LINUX_SRC="$3"
+
+diagnose_segfault() {
+  SOURCE=$(gdb -batch -ex r -ex 'bt 2' --args $@ 2>&1 | grep -Po '#1.* \K([^ ]+:[0-9]+)');
+  IFS=: read FILE LINE <<< "$SOURCE"
+
+  OP="$(sed -n "${LINE}p" "$LINUX_SRC/$FILE" 2>/dev/null)"
+  if [ $? -ne 0 ]; then
+    OP="$(sed -n "${LINE}p" "$LINUX_SRC/tools/fuzz/x86_instruction_emulation/$FILE" 2>/dev/null)"
+  fi
+
+  OP="$(echo $OP | grep -Po 'ops->\K([^(]+)')"
+  if [ -z "$OP" ]; then
+    echo "SEGV: unknown, in $FILE:$LINE"
+  else
+    echo "Expected: segfaulting on emulator->$OP"
+  fi
+}
+export -f diagnose_segfault
+
+bin() {
+  OUTPUT=$(bash -c "timeout 1s $AFL_HARNESS $1 2>&1" 2>&1)
+  RETVAL=$?
+
+  echo "$OUTPUT"
+  if [ $RETVAL -eq 0 ]; then
+    echo "Terminated successfully"
+  elif [ $RETVAL -eq 124 ]; then
+    echo "Unknown: killed due to timeout.  Loop likely."
+  elif echo "$OUTPUT" | grep -q "SEGV"; then
+    echo "$(diagnose_segfault $AFL_HARNESS $1)"
+  elif echo "$OUTPUT" | grep -q "FPE"; then
+    echo "Expected: floating point exception."
+  else
+    echo "Unknown cause of crash."
+  fi
+}
+export -f bin
+
+echo "$(bin $2 2>&1)"
diff --git a/tools/fuzz/x86ie/scripts/coalesce.sh b/tools/fuzz/x86ie/scripts/coalesce.sh
new file mode 100755
index 000000000000..b15d583c2c32
--- /dev/null
+++ b/tools/fuzz/x86ie/scripts/coalesce.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+mkdir -p all
+rm -rf all/*
+find . -type f -wholename '*crashes/id*' | parallel 'cp {} ./all/$(basename $(dirname {//})):{/}'
diff --git a/tools/fuzz/x86ie/scripts/deploy.sh b/tools/fuzz/x86ie/scripts/deploy.sh
new file mode 100644
index 000000000000..f95c3aa2b5b5
--- /dev/null
+++ b/tools/fuzz/x86ie/scripts/deploy.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+
+REMOTE=$1
+DSTDIR=/dev/shm
+
+rsync -av $(pwd) $REMOTE:$DSTDIR
+
+ssh $REMOTE "cd $DSTDIR/$(basename $(pwd)); bash -s tools/fuzz/x86_instruction_emulation/scripts/deploy_remote.sh"
diff --git a/tools/fuzz/x86ie/scripts/deploy_remote.sh b/tools/fuzz/x86ie/scripts/deploy_remote.sh
new file mode 100755
index 000000000000..a903294e145a
--- /dev/null
+++ b/tools/fuzz/x86ie/scripts/deploy_remote.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+
+SCRIPTDIR=$(pwd)/tools/fuzz/x86ie/scripts
+
+$SCRIPTDIR/install_deps_ubuntu.sh
+source $SCRIPTDIR/install_afl.sh
+CC=$AFLPATH/afl-gcc $SCRIPTDIR/build.sh
+sudo bash -c "echo core >/proc/sys/kernel/core_pattern"
+TIMEOUT="${TIMEOUT:-1d}" FUZZDIR="${FUZZDIR:-$(pwd)/fuzz}" $SCRIPTDIR/run.sh
diff --git a/tools/fuzz/x86ie/scripts/gen_output.sh b/tools/fuzz/x86ie/scripts/gen_output.sh
new file mode 100755
index 000000000000..6c0707eb6d08
--- /dev/null
+++ b/tools/fuzz/x86ie/scripts/gen_output.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+
+if [ "$#" -lt 3 ]; then
+  echo "Usage: '$0 path/to/afl-harness path/to/afl_crash_dir path/to/linux/src/root'"
+  exit
+fi
+
+mkdir -p output
+rm -rf output/*
+find $2 -type f | parallel ./bin.sh $1 {} $3 '>' ./output/{/}.out
diff --git a/tools/fuzz/x86ie/scripts/install_afl.sh b/tools/fuzz/x86ie/scripts/install_afl.sh
index 3bdbdf2a040b..e05e9942cc19 100755
--- a/tools/fuzz/x86ie/scripts/install_afl.sh
+++ b/tools/fuzz/x86ie/scripts/install_afl.sh
@@ -13,5 +13,3 @@ set AFL_USE_ASAN
 make clean all
 export AFLPATH="$(pwd)"
 popd
-
-sudo bash -c "echo core >/proc/sys/kernel/core_pattern"
diff --git a/tools/fuzz/x86ie/scripts/install_deps_ubuntu.sh b/tools/fuzz/x86ie/scripts/install_deps_ubuntu.sh
new file mode 100755
index 000000000000..5525bc8b659c
--- /dev/null
+++ b/tools/fuzz/x86ie/scripts/install_deps_ubuntu.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+
+sudo apt update
+sudo apt install -y make gcc wget screen build-essential libssh-dev flex bison libelf-dev bc
diff --git a/tools/fuzz/x86ie/scripts/rebuild.sh b/tools/fuzz/x86ie/scripts/rebuild.sh
new file mode 100755
index 000000000000..809a4551cb0c
--- /dev/null
+++ b/tools/fuzz/x86ie/scripts/rebuild.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+
+make clean
+make tools/fuzz_clean
+FUZZDIR="./fuzz" ./tools/fuzz/x86ie/scripts/build.sh
diff --git a/tools/fuzz/x86ie/scripts/summarize.sh b/tools/fuzz/x86ie/scripts/summarize.sh
new file mode 100755
index 000000000000..27761f283ee3
--- /dev/null
+++ b/tools/fuzz/x86ie/scripts/summarize.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+
+if [ "$#" -lt 1 ]; then
+  echo "Usage: '$0 path/to/output/dir'"
+  exit
+fi
+
+time bash -c "find $1 -type f -exec tail -n 1 {} \; | sort | uniq -c | sort -rn"
-- 
2.17.1




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