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* mandoc -Thtml crashing for certain inputs
@ 2017-05-13 13:06 Abhinav Upadhyay
  2017-05-13 13:47 ` Ingo Schwarze
  0 siblings, 1 reply; 2+ messages in thread
From: Abhinav Upadhyay @ 2017-05-13 13:06 UTC (permalink / raw)
  To: discuss


mandoc -Thtml seems to be crashing in some cases, when you pass the
-Ostyle option to it, such as `mandoc -Thtml -Ostyle=s/style.css'.

 The core indicates a null pointer dereference at line 754 in
mdoc_html.c (1.14.1 release):

if (h->style != NULL && !bl->norm->Bl.comp &&
     (n->parent->prev == NULL ||
      n->parent->prev->body->child != NULL)) {

I am able to hit it with the following test case:

.Dd May 13, 2017
.Dt FOO 8
.Nm foo
.Nd man page for foo
foo bar
.Bl -tag -width Ds
.Sm off
.It Ar device
Open the specified device

It crashes because of the presence of `.Sm off' inside the list. The
actual issue was happening while generating html for the rmt(8) man
page from FreeBSD-12.0-current but I tried to reduce it down to a
smaller test case for ease of debugging.

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2017-05-13 13:06 mandoc -Thtml crashing for certain inputs Abhinav Upadhyay
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