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libsa/printf: Do not fetch long va_arg as long long. 

This does real harm iff all of the following conditions are satisfied:

(1) On ILP32 architectures.
(2) Both LIBSA_PRINTF_LONGLONG_SUPPORT and LIBSA_PRINTF_WIDTH_SUPPORT
    compile-time options are enabled.
(3) Width field is used with 'l' modifier.

This is an implicit-fallthrough bug, but unfortunately, GCC 10.4 cannot
find this out somehow...

XXX
Pull up to netbsd-10 and netbsd-9. netbsd-8 is not affected.
This commit is contained in:
rin 2023-05-29 03:56:52 +00:00
parent d2813c5205
commit 9bacf14f2a
1 changed files with 2 additions and 1 deletions
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3
sys/lib/libsa/subr_prf.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_prf.c,v 1.29 2020/06/06 15:45:47 thorpej Exp $ */
/* $NetBSD: subr_prf.c,v 1.30 2023/05/29 03:56:52 rin Exp $ */
/*-
* Copyright (c) 1993
@ -209,6 +209,7 @@ reswitch:
break;
++fmt;
}
goto reswitch;
#endif
case 'l':
#ifdef LIBSA_PRINTF_LONGLONG_SUPPORT