diff options
| author | JP Abgrall <jpa@google.com> | 2012-04-13 19:22:35 -0700 |
|---|---|---|
| committer | JP Abgrall <jpa@google.com> | 2012-04-18 13:15:22 -0700 |
| commit | e78f8cd270d3af681f4084764cb47206c52cf124 (patch) | |
| tree | 0e01bed72892c8359e8c283633733d8146e35ecc /net/netfilter | |
| parent | 7e08da1fab9c184a9e4b1f640e0100b6e92a3e0b (diff) | |
netfilter: qtaguid: initialize a local var to keep compiler happy.
There was a case that might have seemed like new_tag_stat was not
initialized and actually used.
Added comment explaining why it was impossible, and a BUG()
in case the logic gets changed.
Change-Id: I1eddd1b6f754c08a3bf89f7e9427e5dce1dfb081
Signed-off-by: JP Abgrall <jpa@google.com>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/xt_qtaguid.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/net/netfilter/xt_qtaguid.c b/net/netfilter/xt_qtaguid.c index 08086d680c2..0166d340d5c 100644 --- a/net/netfilter/xt_qtaguid.c +++ b/net/netfilter/xt_qtaguid.c @@ -1265,7 +1265,7 @@ static void if_tag_stat_update(const char *ifname, uid_t uid, struct data_counters *uid_tag_counters; struct sock_tag *sock_tag_entry; struct iface_stat *iface_entry; - struct tag_stat *new_tag_stat; + struct tag_stat *new_tag_stat = NULL; MT_DEBUG("qtaguid: if_tag_stat_update(ifname=%s " "uid=%u sk=%p dir=%d proto=%d bytes=%d)\n", ifname, uid, sk, direction, proto, bytes); @@ -1330,8 +1330,19 @@ static void if_tag_stat_update(const char *ifname, uid_t uid, } if (acct_tag) { + /* Create the child {acct_tag, uid_tag} and hook up parent. */ new_tag_stat = create_if_tag_stat(iface_entry, tag); new_tag_stat->parent_counters = uid_tag_counters; + } else { + /* + * For new_tag_stat to be still NULL here would require: + * {0, uid_tag} exists + * and {acct_tag, uid_tag} doesn't exist + * AND acct_tag == 0. + * Impossible. This reassures us that new_tag_stat + * below will always be assigned. + */ + BUG_ON(!new_tag_stat); } tag_stat_update(new_tag_stat, direction, proto, bytes); spin_unlock_bh(&iface_entry->tag_stat_list_lock); |