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* import.c (collapse_uids): Fix bug 894: possible memory corruption

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around deduplication of user IDs.
This commit is contained in:
David Shaw 2008-03-24 02:28:40 +00:00
parent 537cada38e
commit 766cc26305
2 changed files with 24 additions and 2 deletions
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5
g10/ChangeLog
View File

@ -1,3 +1,8 @@
2008-03-23 David Shaw <dshaw@jabberwocky.com>
* import.c (collapse_uids): Fix bug 894: possible memory
corruption around deduplication of user IDs.
2008-03-17 David Shaw <dshaw@jabberwocky.com>
* parse-packet.c (parse_key): Parse a secret key encrypted with

21
g10/import.c
View File

@ -1654,11 +1654,17 @@ collapse_uids( KBNODE *keyblock )
{
KBNODE uid2;
if(is_deleted_kbnode(uid1))
continue;
if(uid1->pkt->pkttype!=PKT_USER_ID)
continue;
for(uid2=uid1->next;uid2;uid2=uid2->next)
{
if(is_deleted_kbnode(uid2))
continue;
if(uid2->pkt->pkttype!=PKT_USER_ID)
continue;
@ -1674,6 +1680,9 @@ collapse_uids( KBNODE *keyblock )
uid1 */
for(last=uid2;last->next;last=last->next)
{
if(is_deleted_kbnode(last))
continue;
if(last->next->pkt->pkttype==PKT_USER_ID
|| last->next->pkt->pkttype==PKT_PUBLIC_SUBKEY
|| last->next->pkt->pkttype==PKT_SECRET_SUBKEY)
@ -1686,13 +1695,16 @@ collapse_uids( KBNODE *keyblock )
/* Now put uid2 in place as part of uid1 */
last->next=uid1->next;
uid1->next=uid2;
remove_kbnode(keyblock,uid2);
delete_kbnode(uid2);
/* Now dedupe uid1 */
for(sig1=uid1->next;sig1;sig1=sig1->next)
{
KBNODE sig2;
if(is_deleted_kbnode(sig1))
continue;
if(sig1->pkt->pkttype==PKT_USER_ID
|| sig1->pkt->pkttype==PKT_PUBLIC_SUBKEY
|| sig1->pkt->pkttype==PKT_SECRET_SUBKEY)
@ -1703,6 +1715,9 @@ collapse_uids( KBNODE *keyblock )
for(sig2=sig1->next,last=sig1;sig2;last=sig2,sig2=sig2->next)
{
if(is_deleted_kbnode(sig2))
continue;
if(sig2->pkt->pkttype==PKT_USER_ID
|| sig2->pkt->pkttype==PKT_PUBLIC_SUBKEY
|| sig2->pkt->pkttype==PKT_SECRET_SUBKEY)
@ -1716,7 +1731,7 @@ collapse_uids( KBNODE *keyblock )
{
/* We have a match, so delete the second
signature */
remove_kbnode(&uid1,sig2);
delete_kbnode(sig2);
sig2=last;
}
}
@ -1725,6 +1740,8 @@ collapse_uids( KBNODE *keyblock )
}
}
commit_kbnode(keyblock);
if(any && !opt.quiet)
{
const char *key="???";