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Checking location of the instruction pointer to see if it is

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in valid code for Linux exploitability rating.

This CL adds to the Linux exploitability checker by verifying that the
instruction pointer is in valid code. Verification is done by obtaining a
memory mapping of the crash and checking if the instruction pointer lies in
an executable region. If there is no memory mapping, the instruction pointer
is checked to determine if it lies within a known module.

R=ivanpe@chromium.org

Review URL: https://codereview.chromium.org/1210493003

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1464 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
Liu.andrew.x@gmail.com
2015-06-25 23:05:16 +00:00
parent cb4f056f12
commit b559587dd7
6 changed files with 71 additions and 0 deletions
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7
src/processor/exploitability_unittest.cc
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@@ -113,5 +113,12 @@ TEST(ExploitabilityTest, TestLinuxEngine) {
ExploitabilityFor("linux_overflow.dmp"));
ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH,
ExploitabilityFor("linux_stacksmash.dmp"));
ASSERT_EQ(google_breakpad::EXPLOITABILITY_NONE,
ExploitabilityFor("linux_divide_by_zero.dmp"));
ASSERT_EQ(google_breakpad::EXPLOITABILITY_NONE,
ExploitabilityFor("linux_null_dereference.dmp"));
ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH,
ExploitabilityFor("linux_jmp_to_0.dmp"));
}
}