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* [Bug libc/14716] New: memmem crash
@ 2012-10-13 18:47 jan.kratochvil at redhat dot com
2012-10-13 18:58 ` [Bug libc/14716] " jan.kratochvil at redhat dot com
` (9 more replies)
0 siblings, 10 replies; 11+ messages in thread
From: jan.kratochvil at redhat dot com @ 2012-10-13 18:47 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
Bug #: 14716
Summary: memmem crash
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: unassigned@sourceware.org
ReportedBy: jan.kratochvil@redhat.com
CC: allan@archlinux.org, drepper.fsp@gmail.com,
eblake@redhat.com, hjl.tools@gmail.com,
law@redhat.com, maxim.kuvyrkov@gmail.com,
ppluzhnikov@google.com
Depends on: 14602
Classification: Unclassified
Created attachment 6683
--> http://sourceware.org/bugzilla/attachment.cgi?id=6683
GDB debug output
+++ This bug was initially created as a clone of Bug #14602 +++
glibc-2.16.90-24.fc19.x86_64
https://koji.fedoraproject.org/koji/buildinfo?buildID=359617
Core was generated by
`/unsafe/home/jkratoch/hammock/20121013Build-gdbcvs-rawhide/fedora-rawhide-x86_6'.
Program terminated with signal 11, Segmentation fault.
#0 two_way_short_needle (needle_len=<optimized out>, needle=<optimized out>,
haystack_len=<optimized out>, haystack=<optimized out>) at str-two-way.h:309
309 != (haystack_char = CANON_ELEMENT (*phaystack++)))
Detailed debug dump attached.
I do not have it reproducible by hand, it happened during nightly builds.
Regression by:
glibc-2.16.90-23.fc19.x86_64 -> glibc-2.16.90-24.fc19.x86_64
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
@ 2012-10-13 18:58 ` jan.kratochvil at redhat dot com
2012-10-13 19:06 ` jan.kratochvil at redhat dot com
` (8 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: jan.kratochvil at redhat dot com @ 2012-10-13 18:58 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
--- Comment #1 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2012-10-13 18:58:13 UTC ---
Created attachment 6684
--> http://sourceware.org/bugzilla/attachment.cgi?id=6684
.tar.xz of core file, gdb binary, rpm -qa (Fedora Rawhide 2012-10-12)
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
2012-10-13 18:58 ` [Bug libc/14716] " jan.kratochvil at redhat dot com
@ 2012-10-13 19:06 ` jan.kratochvil at redhat dot com
2012-10-13 21:08 ` hjl.tools at gmail dot com
` (7 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: jan.kratochvil at redhat dot com @ 2012-10-13 19:06 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
Jan Kratochvil <jan.kratochvil at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jan.kratochvil at redhat
| |dot com
--- Comment #2 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2012-10-13 19:06:07 UTC ---
Reproduced it with FSF GDB HEAD:
cd gdb/testsuite; while runtest gdb.base/find.exp;do :;done
According to logs crashes also: gdb.python/py-inferior.exp
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
2012-10-13 18:58 ` [Bug libc/14716] " jan.kratochvil at redhat dot com
2012-10-13 19:06 ` jan.kratochvil at redhat dot com
@ 2012-10-13 21:08 ` hjl.tools at gmail dot com
2012-10-13 21:47 ` hjl.tools at gmail dot com
` (6 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: hjl.tools at gmail dot com @ 2012-10-13 21:08 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2012-10-13 21:08:34 UTC ---
Can you provide GDB command line option to trigger this?
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
` (2 preceding siblings ...)
2012-10-13 21:08 ` hjl.tools at gmail dot com
@ 2012-10-13 21:47 ` hjl.tools at gmail dot com
2012-10-14 6:22 ` jan.kratochvil at redhat dot com
` (5 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: hjl.tools at gmail dot com @ 2012-10-13 21:47 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2012-10-13 21:47:25 UTC ---
You can use a memmem wrapper to extract a testcase:
1. Copy simple_memmem from string/test-memmem.c in glibc.
2. Write a function to dump memmem input into a C source code, including
address values.
3. Call simple_memmem to get correct result.
4. Compare result from memmem against simple_memmem. If it fails,
call the dumper to generate the testcase.
4. Link GDB against the memmem wrapper.
You can generate a testcase by
1. Dumper called on wrong result from memmem.
2. Run dumper by hand inside GDB when GDB segfaults
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
` (3 preceding siblings ...)
2012-10-13 21:47 ` hjl.tools at gmail dot com
@ 2012-10-14 6:22 ` jan.kratochvil at redhat dot com
2012-10-14 6:22 ` jan.kratochvil at redhat dot com
` (4 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: jan.kratochvil at redhat dot com @ 2012-10-14 6:22 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
Jan Kratochvil <jan.kratochvil at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #6683|0 |1
is obsolete| |
Attachment #6684|0 |1
is obsolete| |
--- Comment #5 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2012-10-14 06:21:54 UTC ---
Created attachment 6685
--> http://sourceware.org/bugzilla/attachment.cgi?id=6685
.c crash reproducer.
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
` (4 preceding siblings ...)
2012-10-14 6:22 ` jan.kratochvil at redhat dot com
@ 2012-10-14 6:22 ` jan.kratochvil at redhat dot com
2012-10-14 7:14 ` maxim.kuvyrkov at gmail dot com
` (3 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: jan.kratochvil at redhat dot com @ 2012-10-14 6:22 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
Jan Kratochvil <jan.kratochvil at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
` (5 preceding siblings ...)
2012-10-14 6:22 ` jan.kratochvil at redhat dot com
@ 2012-10-14 7:14 ` maxim.kuvyrkov at gmail dot com
2012-10-14 23:36 ` hjl.tools at gmail dot com
` (2 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: maxim.kuvyrkov at gmail dot com @ 2012-10-14 7:14 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
Maxim Kuvyrkov <maxim.kuvyrkov at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|unassigned at sourceware |maxim.kuvyrkov at gmail dot
|dot org |com
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
` (6 preceding siblings ...)
2012-10-14 7:14 ` maxim.kuvyrkov at gmail dot com
@ 2012-10-14 23:36 ` hjl.tools at gmail dot com
2012-10-16 0:25 ` maxim.kuvyrkov at gmail dot com
2014-06-14 12:55 ` fweimer at redhat dot com
9 siblings, 0 replies; 11+ messages in thread
From: hjl.tools at gmail dot com @ 2012-10-14 23:36 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |2.17
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
` (7 preceding siblings ...)
2012-10-14 23:36 ` hjl.tools at gmail dot com
@ 2012-10-16 0:25 ` maxim.kuvyrkov at gmail dot com
2014-06-14 12:55 ` fweimer at redhat dot com
9 siblings, 0 replies; 11+ messages in thread
From: maxim.kuvyrkov at gmail dot com @ 2012-10-16 0:25 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14716
Maxim Kuvyrkov <maxim.kuvyrkov at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #6 from Maxim Kuvyrkov <maxim.kuvyrkov at gmail dot com> 2012-10-16 00:25:00 UTC ---
Fixed in e9f372520618161d7d73e028ca23818e83b88bbc.
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* [Bug libc/14716] memmem crash
2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
` (8 preceding siblings ...)
2012-10-16 0:25 ` maxim.kuvyrkov at gmail dot com
@ 2014-06-14 12:55 ` fweimer at redhat dot com
9 siblings, 0 replies; 11+ messages in thread
From: fweimer at redhat dot com @ 2014-06-14 12:55 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=14716
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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2012-10-13 18:47 [Bug libc/14716] New: memmem crash jan.kratochvil at redhat dot com
2012-10-13 18:58 ` [Bug libc/14716] " jan.kratochvil at redhat dot com
2012-10-13 19:06 ` jan.kratochvil at redhat dot com
2012-10-13 21:08 ` hjl.tools at gmail dot com
2012-10-13 21:47 ` hjl.tools at gmail dot com
2012-10-14 6:22 ` jan.kratochvil at redhat dot com
2012-10-14 6:22 ` jan.kratochvil at redhat dot com
2012-10-14 7:14 ` maxim.kuvyrkov at gmail dot com
2012-10-14 23:36 ` hjl.tools at gmail dot com
2012-10-16 0:25 ` maxim.kuvyrkov at gmail dot com
2014-06-14 12:55 ` fweimer at redhat dot com
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