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g10: Fix another race condition for trustdb access. 

* g10/tdbio.c (create_version_record): Call create_hashtable to always
make hashtable, together with the version record.
(get_trusthashrec): Remove call to create_hashtable.

--

GnuPG-bug-id: 1675
Thanks to Scott Moser to reproducible script and patience.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

(backport from master
 commit 35a3ce2acf)
This commit is contained in:
Niibe Yutaka 2016-06-15 08:41:56 +09:00
parent d8775285e9
commit 00d737e3fd
1 changed files with 5 additions and 2 deletions
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7
g10/tdbio.c
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@ -92,6 +92,7 @@ static int db_fd = -1;
static int in_transaction;
static void open_db(void);
static void create_hashtable (TRUSTREC *vr, int type);
static int
take_write_lock (void)
@ -471,6 +472,10 @@ create_version_record (void)
rc = tdbio_write_record( &rec );
if( !rc )
tdbio_sync();
if (!rc)
create_hashtable (&rec, 0);
return rc;
}
@ -763,8 +768,6 @@ get_trusthashrec(void)
if( rc )
log_fatal( _("%s: error reading version record: %s\n"),
db_name, g10_errstr(rc) );
if( !vr.r.ver.trusthashtbl )
create_hashtable( &vr, 0 );
trusthashtbl = vr.r.ver.trusthashtbl;
}