Bug 1012498 - Suspect results of exploitability analysis
Suspect results of exploitability analysis
Product: Fedora
Classification: Fedora
Component: abrt (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: abrt
Fedora Extras Quality Assurance
Depends On:
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Reported: 2013-09-26 10:50 EDT by Miloslav Trmač
Modified: 2016-07-19 06:26 EDT (History)
6 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-07-19 06:26:43 EDT
Type: Bug
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Description Miloslav Trmač 2013-09-26 10:50:44 EDT
Looking at bug #1012128:
> Likely crash reason: Jump to an invalid address
Yet, in the backtrace, %rip is
> rip            0x7fb56ea6eb85	0x7fb56ea6eb85 <intel_miptree_map+85>
which, according to the disassembly directly below, seems to be a valid instruction address.
Comment 1 Denys Vlasenko 2013-10-03 05:34:07 EDT
I don't know how it happens, need more diagnostic.

I added the following in order to have it:

commit f1a25dbb7c3d706ddd16122e1b8402d5311c8681
Author: Denys Vlasenko <dvlasenk@redhat.com>
Date:   Sun Sep 1 20:09:30 2013 +0200

    abrt-gdb-exploitable: print current instruction

    I've seen strange BZ created by abrt where "exploitable" element
    looked bogus. It claimed that the crash was jumping to bogus address
    yet crashing insn was a benign reg-to-reg move.

    This patch makes analyzer to record what it thinks current insn is.

    Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
    Signed-off-by: Richard Marko <rmarko@redhat.com>

diff --git a/src/plugins/abrt-gdb-exploitable b/src/plugins/abrt-gdb-exploitable
index 950797b..abc1fa4 100755
--- a/src/plugins/abrt-gdb-exploitable
+++ b/src/plugins/abrt-gdb-exploitable
@@ -705,6 +705,8 @@ class AbrtExploitable(gdb.Command):
                     f = open(args[1], 'w')
                 f.write(_("Likely crash reason: ") + si.exploitable_desc + "\n")
                 f.write(_("Exploitable rating (0-9 scale): ") + str(si.exploitable_rating) + "\n")
+                if si.current_instruction:
+                    f.write(_("Current instruction: ") + si.current_instruction + "\n")
Comment 2 Denys Vlasenko 2013-10-03 05:51:06 EDT
There are 522 bugs filed so far with "exploitable" element. I checked a few recent ones, all of them are:

Likely crash reason: Jump to an invalid address
Exploitable rating (0-9 scale): 6

Comment 3 Jaroslav Reznik 2015-03-03 10:06:29 EST
This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle.
Changing version to '22'.

More information and reason for this action is here:
Comment 4 Fedora End Of Life 2016-07-19 06:26:43 EDT
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this

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