This is a note to let you know that I've just added the patch titled libceph: allow addrvecs with a single NONE/blank address to the 5.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: libceph-allow-addrvecs-with-a-single-none-blank-address.patch and it can be found in the queue-5.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 3f1c6f2122fc780560f09735b6d1dbf39b44eb0f Mon Sep 17 00:00:00 2001 From: Ilya Dryomov <idryomov@xxxxxxxxx> Date: Mon, 3 May 2021 17:09:01 +0200 Subject: libceph: allow addrvecs with a single NONE/blank address From: Ilya Dryomov <idryomov@xxxxxxxxx> commit 3f1c6f2122fc780560f09735b6d1dbf39b44eb0f upstream. Normally, an unused OSD id/slot is represented by an empty addrvec. However, it also appears to be possible to generate an osdmap where an unused OSD id/slot has an addrvec with a single blank address of type NONE. Allow such addrvecs and make the end result be exactly the same as for the empty addrvec case -- leave addr intact. Cc: stable@xxxxxxxxxxxxxxx # 5.11+ Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx> Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/ceph/decode.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) --- a/net/ceph/decode.c +++ b/net/ceph/decode.c @@ -4,6 +4,7 @@ #include <linux/inet.h> #include <linux/ceph/decode.h> +#include <linux/ceph/messenger.h> /* for ceph_pr_addr() */ static int ceph_decode_entity_addr_versioned(void **p, void *end, @@ -110,6 +111,7 @@ int ceph_decode_entity_addrvec(void **p, } ceph_decode_32_safe(p, end, addr_cnt, e_inval); + dout("%s addr_cnt %d\n", __func__, addr_cnt); found = false; for (i = 0; i < addr_cnt; i++) { @@ -117,6 +119,7 @@ int ceph_decode_entity_addrvec(void **p, if (ret) return ret; + dout("%s i %d addr %s\n", __func__, i, ceph_pr_addr(&tmp_addr)); if (tmp_addr.type == my_type) { if (found) { pr_err("another match of type %d in addrvec\n", @@ -128,13 +131,18 @@ int ceph_decode_entity_addrvec(void **p, found = true; } } - if (!found && addr_cnt != 0) { - pr_err("no match of type %d in addrvec\n", - le32_to_cpu(my_type)); - return -ENOENT; - } - return 0; + if (found) + return 0; + + if (!addr_cnt) + return 0; /* normal -- e.g. unused OSD id/slot */ + + if (addr_cnt == 1 && !memchr_inv(&tmp_addr, 0, sizeof(tmp_addr))) + return 0; /* weird but effectively the same as !addr_cnt */ + + pr_err("no match of type %d in addrvec\n", le32_to_cpu(my_type)); + return -ENOENT; e_inval: return -EINVAL; Patches currently in stable-queue which might be from idryomov@xxxxxxxxx are queue-5.12/libceph-allow-addrvecs-with-a-single-none-blank-address.patch queue-5.12/libceph-don-t-set-global_id-until-we-get-an-auth-ticket.patch queue-5.12/libceph-bump-cephxauthenticate-encoding-version.patch