From owner-freebsd-current  Sat Jun  2  3:26:39 2001
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Date: Sat, 2 Jun 2001 13:26:27 +0300 (EEST)
Message-Id: <200106021026.f52AQQo50360@mail.uic-in.net>
To: current@FreeBSD.org
From: Maxim Sobolev <sobomax@mail-in.net>
Reply-To: sobomax@FreeBSD.org
Subject: sscanf(3) is broken in 5-CURRENT [SIGBUS]
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Hi,

It seems that something is wrong with sscanf(3) in -current - in
some cases it may cause SIGBUS. I failed to reproduce the
problem on 4-STABLE, so it is a -current specific bug. Attached
please find small showcase that exposes the bug in question
and a backtrace after SIGBUS.

Please fix.

-Maxim

#include <stdio.h>
int
main()
{
	float sub;
	sscanf("59e", "%f", &sub);
	exit(0);
}

(gdb) r
Starting program: /tmp/bug/a.out 
Program received signal SIGBUS, Bus error.
0x280b3ad8 in __ungetc () from /usr/lib/libc.so.5
(gdb) bt
#0  0x280b3ad8 in __ungetc () from /usr/lib/libc.so.5
#1  0x280b36b1 in __svfscanf () from /usr/lib/libc.so.5
#2  0x280b25a3 in sscanf () from /usr/lib/libc.so.5
#3  0x80484c0 in main () at bug.c:8
#4  0x80483f5 in _start ()

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