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| author | Dan Carpenter <error27@gmail.com> | 2010-07-10 16:33:36 +0200 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2010-07-12 13:57:53 -0700 |
| commit | e372357ba55ae89307af15cd680467d8f0db4f01 (patch) | |
| tree | ad5220668336431e815d0a933ffc9faed6a4a408 /fs/ocfs2 | |
| parent | 121a39bb00b421211f4f590c440a8f636d3ae807 (diff) | |
| download | lwn-e372357ba55ae89307af15cd680467d8f0db4f01.tar.gz lwn-e372357ba55ae89307af15cd680467d8f0db4f01.zip | |
ocfs2: tighten up strlen() checking
This function is only called from one place and it's like this:
dlm_register_domain(conn->cc_name, dlm_key, &fs_version);
The "conn->cc_name" is 64 characters long. If strlen(conn->cc_name)
were equal to O2NM_MAX_NAME_LEN (64) that would be a bug because
strlen() doesn't count the NULL character.
In fact, if you look how O2NM_MAX_NAME_LEN is used, it mostly describes
64 character buffers. The only exception is nd_name from struct
o2nm_node.
Anyway I looked into it and in this case the domain string comes from
osb->uuid_str in ocfs2_setup_osb_uuid(). That's 32 characters and NULL
which easily fits into O2NM_MAX_NAME_LEN. This patch doesn't change how
the code works, but I think it makes the code a little cleaner.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2')
| -rw-r--r-- | fs/ocfs2/dlm/dlmdomain.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index 2ccad86fb590..153abb5abef0 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -1671,7 +1671,7 @@ struct dlm_ctxt * dlm_register_domain(const char *domain, struct dlm_ctxt *dlm = NULL; struct dlm_ctxt *new_ctxt = NULL; - if (strlen(domain) > O2NM_MAX_NAME_LEN) { + if (strlen(domain) >= O2NM_MAX_NAME_LEN) { ret = -ENAMETOOLONG; mlog(ML_ERROR, "domain name length too long\n"); goto leave; |