The Samba-Bugzilla – Attachment 12168 Details for
Bug 11959
Failure path in ads_keytab_create_default() can crash when krb5_context == NULL.
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[patch]
git-am fix for master. Submitted to samba-technical.
0001-s3-krb5-keytab-The-done-label-can-be-jumped-to-with-.patch (text/plain), 1.36 KB, created by
Jeremy Allison
on 2016-06-08 22:01:42 UTC
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Description:
git-am fix for master. Submitted to samba-technical.
Filename:
MIME Type:
Creator:
Jeremy Allison
Created:
2016-06-08 22:01:42 UTC
Size:
1.36 KB
patch
obsolete
>From 7f98ecb6e208401a311bbede7c94e95316635e8a Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Wed, 8 Jun 2016 14:50:59 -0700 >Subject: [PATCH] s3: krb5: keytab - The done label can be jumped to with > context == NULL. > >Ensure we don't crash in this case. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/libads/kerberos_keytab.c | 18 ++++++++---------- > 1 file changed, 8 insertions(+), 10 deletions(-) > >diff --git a/source3/libads/kerberos_keytab.c b/source3/libads/kerberos_keytab.c >index ae3d80e39..2068d03 100644 >--- a/source3/libads/kerberos_keytab.c >+++ b/source3/libads/kerberos_keytab.c >@@ -742,26 +742,24 @@ done: > TALLOC_FREE(oldEntries); > TALLOC_FREE(frame); > >- { >+ if (context) { > krb5_keytab_entry zero_kt_entry; >+ krb5_kt_cursor zero_csr; >+ > ZERO_STRUCT(zero_kt_entry); >+ ZERO_STRUCT(zero_csr); >+ > if (memcmp(&zero_kt_entry, &kt_entry, > sizeof(krb5_keytab_entry))) { > smb_krb5_kt_free_entry(context, &kt_entry); > } >- } >- { >- krb5_kt_cursor zero_csr; >- ZERO_STRUCT(zero_csr); > if ((memcmp(&cursor, &zero_csr, > sizeof(krb5_kt_cursor)) != 0) && keytab) { > krb5_kt_end_seq_get(context, keytab, &cursor); > } >- } >- if (keytab) { >- krb5_kt_close(context, keytab); >- } >- if (context) { >+ if (keytab) { >+ krb5_kt_close(context, keytab); >+ } > krb5_free_context(context); > } > return ret; >-- >2.8.0.rc3.226.g39d4020 >
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bug 11959
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