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gpg: Auto-fix a broken trustdb with just the version record.

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* g10/tdbio.c (get_trusthashrec): Create hashtable on error.

GnuPG-bug-id: 3839
Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2018-03-26 18:20:16 +02:00
parent a750ebebf3
commit eb68c2d3d1
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GPG Key ID: E3FDFF218E45B72B
1 changed files with 14 additions and 0 deletions
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14
g10/tdbio.c
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@ -990,6 +990,20 @@ get_trusthashrec (ctrl_t ctrl)
log_fatal (_("%s: error reading version record: %s\n"),
db_name, gpg_strerror (rc) );
if (!vr.r.ver.trusthashtbl)
{
/* Oops: the trustdb is corrupt because the hashtable is
* always created along with the version record. However,
* if something went initially wrong it may happen that
* there is just the version record. We try to fix it here.
* If we can't do that we return 0 - this is the version
* record and thus the actual read will detect the mismatch
* and bail out. Note that create_hashtable updates VR. */
take_write_lock ();
if (lseek (db_fd, 0, SEEK_END) == TRUST_RECORD_LEN)
create_hashtable (ctrl, &vr, 0);
release_write_lock ();
}
trusthashtbl = vr.r.ver.trusthashtbl;
}