https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgpg-error.git;a=patch;h=791177de023574223eddf7288eb7c5a0721ac623 From 791177de023574223eddf7288eb7c5a0721ac623 Mon Sep 17 00:00:00 2001 From: Werner Koch Date: Sun, 18 Mar 2018 17:39:43 +0100 Subject: [PATCH] core: Fix regression on arm64 due to invalid use of va_list. * src/logging.c (_gpgrt_log_printhex): Provide a dummy arg instead of NULL. -- Fix Suggested-by: Jakub Wilk Signed-off-by: Werner Koch --- src/logging.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/src/logging.c b/src/logging.c index 1a4f620..d01f974 100644 --- a/src/logging.c +++ b/src/logging.c @@ -1090,9 +1090,10 @@ _gpgrt_log_flush (void) /* Print a hexdump of (BUFFER,LENGTH). With FMT passed as NULL print - * just the raw dump, with FMT being an empty string, print a trailing - * linefeed, otherwise print an entire debug line with the expanded - * FMT followed by a possible wrapped hexdump and a final LF. */ + * just the raw dump (in this case ARG_PTR is not used), with FMT + * being an empty string, print a trailing linefeed, otherwise print + * an entire debug line with the expanded FMT followed by a possible + * wrapped hexdump and a final LF. */ void _gpgrt_logv_printhex (const void *buffer, size_t length, const char *fmt, va_list arg_ptr) @@ -1150,7 +1151,16 @@ _gpgrt_log_printhex (const void *buffer, size_t length, va_end (arg_ptr); } else - _gpgrt_logv_printhex (buffer, length, NULL, NULL); + { + /* va_list is not necessary a pointer and thus we can't use NULL + * because that would conflict with platforms using a straight + * struct for it (e.g. arm64). We use a dummy variable instead; + * the static is a simple way zero it out so to not get + * complains about uninitialized use. */ + static va_list dummy_argptr; + + _gpgrt_logv_printhex (buffer, length, NULL, dummy_argptr); + } } -- 2.8.0.rc3