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| author | Luís Henriques <lhenriques@suse.de> | 2022-05-23 19:09:51 +0300 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2022-05-25 21:45:14 +0300 |
| commit | ea16567f11018e2f58e72b667b0c803ff92b8153 (patch) | |
| tree | f77675fec7370b81f30867db2131b9a34342d9b3 /fs | |
| parent | 5e56776d5215ab5ab886006fc749346bad8473c8 (diff) | |
| download | linux-ea16567f11018e2f58e72b667b0c803ff92b8153.tar.xz | |
ceph: fix decoding of client session messages flags
The cephfs kernel client started to show the message:
ceph: mds0 session blocklisted
when mounting a filesystem. This is due to the fact that the session
messages are being incorrectly decoded: the skip needs to take into
account the 'len'.
While there, fixed some whitespaces too.
Cc: stable@vger.kernel.org
Fixes: e1c9788cb397 ("ceph: don't rely on error_string to validate blocklisted session.")
Signed-off-by: Luís Henriques <lhenriques@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/mds_client.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index e9eb996e0aee..f5d110d90b77 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3425,13 +3425,17 @@ static void handle_session(struct ceph_mds_session *session, } if (msg_version >= 5) { - u32 flags; - /* version >= 4, struct_v, struct_cv, len, metric_spec */ - ceph_decode_skip_n(&p, end, 2 + sizeof(u32) * 2, bad); + u32 flags, len; + + /* version >= 4 */ + ceph_decode_skip_16(&p, end, bad); /* struct_v, struct_cv */ + ceph_decode_32_safe(&p, end, len, bad); /* len */ + ceph_decode_skip_n(&p, end, len, bad); /* metric_spec */ + /* version >= 5, flags */ - ceph_decode_32_safe(&p, end, flags, bad); + ceph_decode_32_safe(&p, end, flags, bad); if (flags & CEPH_SESSION_BLOCKLISTED) { - pr_warn("mds%d session blocklisted\n", session->s_mds); + pr_warn("mds%d session blocklisted\n", session->s_mds); blocklisted = true; } } |