From a0fabe9e5d1cf74cb10020f34f185de90187b8e7 Mon Sep 17 00:00:00 2001 From: Ingo Schwarze Date: Thu, 25 Dec 2014 17:23:32 +0000 Subject: Reduce memory and time consumption on certain malformed input files by limiting the length of expanded input lines during the (usually recursive) expansion of user defined strings. Resource hogging found by jsg@ with afl. --- roff.7 | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'roff.7') diff --git a/roff.7 b/roff.7 index 6ee29321..eeda83c7 100644 --- a/roff.7 +++ b/roff.7 @@ -1,4 +1,4 @@ -.\" $Id: roff.7,v 1.60 2014/12/02 10:08:06 schwarze Exp $ +.\" $Id: roff.7,v 1.61 2014/12/25 17:23:32 schwarze Exp $ .\" .\" Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons .\" Copyright (c) 2010, 2011, 2013, 2014 Ingo Schwarze @@ -15,7 +15,7 @@ .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" -.Dd $Mdocdate: December 2 2014 $ +.Dd $Mdocdate: December 25 2014 $ .Dt ROFF 7 .Os .Sh NAME @@ -543,8 +543,10 @@ one explicit newline character. In order to prevent endless recursion, both groff and .Xr mandoc 1 limit the stack depth for expanding macros and strings -to a large, but finite number. -Do not rely on the exact value of this limit. +to a large, but finite number, and +.Xr mandoc 1 +also limits the length of the expanded input line. +Do not rely on the exact values of these limits. .Ss \&dei Define a .Nm -- cgit v1.2.3