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regex: don't deref NULL upon heap allocation failure 

* posix/regcomp.c: (parse_dup_op): Handle duplicate_tree
failure in one more place.
To trigger the segfault, configure grep -with-included-regex,
build it, and run these commands:
( ulimit -v 300000; echo a|src/grep -E a+++++++++++++++++++++ )
This commit is contained in:
Jim Meyering 2014-07-12 17:07:21 -07:00
parent 9d39d517a7
commit 7ee03f0018
2 changed files with 12 additions and 0 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2014-07-13 Jim Meyering <meyering@fb.com>
[BZ 17150]
regex: don't deref NULL upon heap allocation failure
* posix/regcomp.c: (parse_dup_op): Handle duplicate_tree
failure in one more place.
To trigger the segfault, configure grep -with-included-regex,
build it, and run these commands:
( ulimit -v 300000; echo a|src/grep -E a+++++++++++++++++++++ )
2014-07-13 Andreas Schwab <schwab@linux-m68k.org>
* sysdeps/m68k/m680x0/fpu/libm-test-ulps: Update.

2
posix/regcomp.c
View File

@ -2582,6 +2582,8 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
/* Duplicate ELEM before it is marked optional. */
elem = duplicate_tree (elem, dfa);
if (BE (elem == NULL, 0))
goto parse_dup_op_espace;
old_tree = tree;
}
else