From: John Regehr <regehr@cs.utah.edu>
To: musl@lists.openwall.com
Subject: uninitialized variable
Date: Thu, 19 May 2016 17:28:58 +0200 [thread overview]
Message-ID: <e8f9f75f-9aef-e771-e6ad-4045e6fcbf1e@cs.utah.edu> (raw)
This call:
regcomp(&r, "^(b+|||(CW*)*|){5,}{53}*+)^?5,}", REG_EXTENDED);
ends up using uninitialized memory like so:
regcomp.c:221:[kernel] warning: accessing uninitialized left-value:
assert \initialized(&right->num_submatches);
stack: tre_ast_new_catenation :: regcomp.c:1764 <-
tre_copy_ast :: regcomp.c:1916 <-
tre_expand_ast :: regcomp.c:2771 <-
musl_regcomp :: foo.c:9 <-
main
Having crap in this field seems bad since it is used to compute a malloc
size.
John
next reply other threads:[~2016-05-19 15:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-19 15:28 John Regehr [this message]
2016-05-20 20:44 ` Szabolcs Nagy
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