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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-05-25 16:26:52 -0600 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-08-14 21:55:29 -0700 |
| commit | da7428080a15189c7acd266d514324f2a2e89e14 (patch) | |
| tree | 089a7f484ac3886d67e7d2db936dd69c5e150cc4 /net | |
| parent | 8c6e2a941ae74d850a7bf0e5b3f4cd567e0f27dc (diff) | |
| download | linux-stable-da7428080a15189c7acd266d514324f2a2e89e14.tar.gz linux-stable-da7428080a15189c7acd266d514324f2a2e89e14.tar.bz2 linux-stable-da7428080a15189c7acd266d514324f2a2e89e14.zip | |
userns xt_recent: Specify the owner/group of ip_list_perms in the initial user namespace
xt_recent creates a bunch of proc files and initializes their uid
and gids to the values of ip_list_uid and ip_list_gid. When
initialize those proc files convert those values to kuids so they
can continue to reside on the /proc inode.
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Jan Engelhardt <jengelh@medozas.de>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/xt_recent.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c index ae2ad1eec8d0..4635c9b00459 100644 --- a/net/netfilter/xt_recent.c +++ b/net/netfilter/xt_recent.c @@ -317,6 +317,8 @@ static int recent_mt_check(const struct xt_mtchk_param *par, struct recent_table *t; #ifdef CONFIG_PROC_FS struct proc_dir_entry *pde; + kuid_t uid; + kgid_t gid; #endif unsigned int i; int ret = -EINVAL; @@ -372,6 +374,13 @@ static int recent_mt_check(const struct xt_mtchk_param *par, for (i = 0; i < ip_list_hash_size; i++) INIT_LIST_HEAD(&t->iphash[i]); #ifdef CONFIG_PROC_FS + uid = make_kuid(&init_user_ns, ip_list_uid); + gid = make_kgid(&init_user_ns, ip_list_gid); + if (!uid_valid(uid) || !gid_valid(gid)) { + kfree(t); + ret = -EINVAL; + goto out; + } pde = proc_create_data(t->name, ip_list_perms, recent_net->xt_recent, &recent_mt_fops, t); if (pde == NULL) { @@ -379,8 +388,8 @@ static int recent_mt_check(const struct xt_mtchk_param *par, ret = -ENOMEM; goto out; } - pde->uid = ip_list_uid; - pde->gid = ip_list_gid; + pde->uid = uid; + pde->gid = gid; #endif spin_lock_bh(&recent_lock); list_add_tail(&t->list, &recent_net->tables); |