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* [Bug regex/11053] New: Segfault on invalid backreference
@ 2009-12-04 19:36 bonzini at gnu dot org
  2010-04-05 19:39 ` [Bug regex/11053] " drepper at redhat dot com
  2010-04-09 17:46 ` [Bug regex/11053] Wrong results with backreferences bonzini at gnu dot org
  0 siblings, 2 replies; 3+ messages in thread
From: bonzini at gnu dot org @ 2009-12-04 19:36 UTC (permalink / raw)
  To: glibc-bugs-regex

$ echo 87654321 | \
  grep -E -e '^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\9\8\7\6\5\4\3\2\1$' 
Segmentation fault

Will work on a C reproducer soon.

-- 
           Summary: Segfault on invalid backreference
           Product: glibc
           Version: 2.11
            Status: NEW
          Severity: normal
          Priority: P2
         Component: regex
        AssignedTo: drepper at redhat dot com
        ReportedBy: bonzini at gnu dot org
                CC: glibc-bugs-regex at sources dot redhat dot com,glibc-
                    bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=11053

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^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug regex/11053] Segfault on invalid backreference
  2009-12-04 19:36 [Bug regex/11053] New: Segfault on invalid backreference bonzini at gnu dot org
@ 2010-04-05 19:39 ` drepper at redhat dot com
  2010-04-09 17:46 ` [Bug regex/11053] Wrong results with backreferences bonzini at gnu dot org
  1 sibling, 0 replies; 3+ messages in thread
From: drepper at redhat dot com @ 2010-04-05 19:39 UTC (permalink / raw)
  To: glibc-bugs-regex



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|drepper at redhat dot com   |bonzini at gnu dot org
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=11053

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^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug regex/11053] Wrong results with backreferences
  2009-12-04 19:36 [Bug regex/11053] New: Segfault on invalid backreference bonzini at gnu dot org
  2010-04-05 19:39 ` [Bug regex/11053] " drepper at redhat dot com
@ 2010-04-09 17:46 ` bonzini at gnu dot org
  1 sibling, 0 replies; 3+ messages in thread
From: bonzini at gnu dot org @ 2010-04-09 17:46 UTC (permalink / raw)
  To: glibc-bugs-regex


------- Additional Comments From bonzini at gnu dot org  2010-04-09 17:46 -------
Minimized testcases (same regex):

$ echo 8 | grep -E -e "$regex"
8          # >>> okay
$ echo 87 | grep -E -e "$regex"
Segmentation fault

$ echo 88 | grep -E -e "$regex"
88         # >>> okay
$ echo 887 | grep -E -e "$regex"
Segmentation fault

Also, everything I tried to feed that is of length 9 or higher and should not
match, gives either a false positive or a segfault:

$ echo 987654321 | grep -E -e "$regex"
887654321
$ echo 484635532 | grep -E -e "$regex"
484635532
$ echo 0123454321 | grep -E -e "$regex"
Segmentation fault
$ echo 0000123454321 | grep -E -e "$regex"
Segmentation fault


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Segfault on invalid         |Wrong results with
                   |backreference               |backreferences


http://sourceware.org/bugzilla/show_bug.cgi?id=11053

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-- links below jump to the message on this page --
2009-12-04 19:36 [Bug regex/11053] New: Segfault on invalid backreference bonzini at gnu dot org
2010-04-05 19:39 ` [Bug regex/11053] " drepper at redhat dot com
2010-04-09 17:46 ` [Bug regex/11053] Wrong results with backreferences bonzini at gnu dot org

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