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Avoid infinite recursion on:

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echo "foo foo bar bar bar baz" | sed 's/\([^ ]*\)\( *\1\)*/\1/g'

Obtained from:	OpenBSD via NetBSD (rev. 1.18)
This commit is contained in:
Xin LI 2007-03-05 03:07:36 +00:00
parent c907770c56
commit 0f4481c5e4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=167216
1 changed files with 2 additions and 0 deletions
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2
lib/libc/regex/engine.c
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@ -674,6 +674,8 @@ sopno lev; /* PLUS nesting level */
return(NULL);
assert(m->pmatch[i].rm_so != -1);
len = m->pmatch[i].rm_eo - m->pmatch[i].rm_so;
if (len == 0)
return(NULL);
assert(stop - m->beginp >= len);
if (sp > stop - len)
return(NULL); /* not enough left to match */