g10: Block signals in g10_exit.

* g10/gpg.c (g10_exit): Block all signals before calling
emergency_cleanup.

--

There is a race condition here which results crash of the process.
When a signal is delivered in emergency_cleanup, it is called again.
This change fixes the problem.

GnuPG-bug-id: 2747
Signed-off-by: NIIBE Yutaka <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/g10/gpg.c b/g10/gpg.c
index b46d22690..1819c3fe8 100644
--- a/g10/gpg.c
+++ b/g10/gpg.c
@@ -5231,6 +5231,7 @@ g10_exit( int rc )
   if (opt.debug)
     gcry_control (GCRYCTL_DUMP_SECMEM_STATS );
 
+  gnupg_block_all_signals ();
   emergency_cleanup ();
 
   rc = rc? rc : log_get_errorcount(0)? 2 : g10_errors_seen? 1 : 0;