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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 <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2019-06-04 13:39:46 +09:00
parent 0076bef202
commit 537fbe13af
1 changed files with 1 additions and 0 deletions
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g10/gpg.c
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@ -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;