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From 0890a832accffe4ddfb882528346b3d9c65b351c Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Fabiano=20Fid=C3=AAncio?= <fidencio@redhat.com>
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Date: Wed, 28 Mar 2018 18:27:06 +0200
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Subject: [PATCH] Continue after KRB5_CC_END in KCM cache iteration
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The KCM server returns KRB5_CC_END in response to a GET_CACHE_BY_UUID
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request to indicate that the specified ccache uuid no longer exists.
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In krb5_ptcursor_next(), ignore this error and continue the iteration,
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as the Heimdal KCM client code does.
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In addition to addressing the case where a third party deletes a cache
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between the GET_CACHE_UUID_LIST request and when we reach that uuid in
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the iteration, this change also fixes a bug in kdestroy -A where the
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caller deletes the primary cache and we later request it by uuid when
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iterating over the list.
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[ghudson@mit.edu: rewrote commit message; edited comment]
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(cherry picked from commit 49087f5e6309f298f8898c35af6f4ade418ced60)
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ticket: 8658
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version_fixed: 1.16.1
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(cherry picked from commit 576d4294ea789c3d25c50a43fe9246cfe499585f)
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---
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src/lib/krb5/ccache/cc_kcm.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/src/lib/krb5/ccache/cc_kcm.c b/src/lib/krb5/ccache/cc_kcm.c
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index a889e67b4..a3afd7056 100644
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--- a/src/lib/krb5/ccache/cc_kcm.c
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+++ b/src/lib/krb5/ccache/cc_kcm.c
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@@ -966,6 +966,9 @@ kcm_ptcursor_next(krb5_context context, krb5_cc_ptcursor cursor,
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kcmreq_init(&req, KCM_OP_GET_CACHE_BY_UUID, NULL);
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k5_buf_add_len(&req.reqbuf, id, KCM_UUID_LEN);
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ret = kcmio_call(context, data->io, &req;;
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+ /* Continue if the cache has been deleted. */
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+ if (ret == KRB5_CC_END)
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+ continue;
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if (ret)
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goto cleanup;
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ret = kcmreq_get_name(&req, &name);
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