| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20180316233251.GJ30522@ZenIV.linux.org.uk>
Date: Fri, 16 Mar 2018 23:32:51 +0000
From: Al Viro <viro@...IV.linux.org.uk>
To: netdev@...r.kernel.org
Cc: linux-sctp@...r.kernel.org
Subject: [PATCH v2] sctp: use proc_remove_subtree()
use proc_remove_subtree() for subtree removal, both on setup failure
halfway through and on teardown. No need to make simple things
complex...
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
include/net/sctp/sctp.h | 11 +----------
net/sctp/objcnt.c | 8 --------
net/sctp/proc.c | 90 +++++++++++++++++++++---------------------------------------------------------------------
net/sctp/protocol.c | 59 ++++++-----------------------------------------------------
4 files changed, 28 insertions(+), 140 deletions(-)
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index f7ae6b0a21d0..72c5b8fc3232 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -180,14 +180,7 @@ struct sctp_transport *sctp_epaddr_lookup_transport(
/*
* sctp/proc.c
*/
-int sctp_snmp_proc_init(struct net *net);
-void sctp_snmp_proc_exit(struct net *net);
-int sctp_eps_proc_init(struct net *net);
-void sctp_eps_proc_exit(struct net *net);
-int sctp_assocs_proc_init(struct net *net);
-void sctp_assocs_proc_exit(struct net *net);
-int sctp_remaddr_proc_init(struct net *net);
-void sctp_remaddr_proc_exit(struct net *net);
+int __net_init sctp_proc_init(struct net *net);
/*
* sctp/offload.c
@@ -318,7 +311,6 @@ atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
{.label= #name, .counter= &sctp_dbg_objcnt_## name}
void sctp_dbg_objcnt_init(struct net *);
-void sctp_dbg_objcnt_exit(struct net *);
#else
@@ -326,7 +318,6 @@ void sctp_dbg_objcnt_exit(struct net *);
#define SCTP_DBG_OBJCNT_DEC(name)
static inline void sctp_dbg_objcnt_init(struct net *net) { return; }
-static inline void sctp_dbg_objcnt_exit(struct net *net) { return; }
#endif /* CONFIG_SCTP_DBG_OBJCOUNT */
diff --git a/net/sctp/objcnt.c b/net/sctp/objcnt.c
index aeea6da81441..fd2684ad94c8 100644
--- a/net/sctp/objcnt.c
+++ b/net/sctp/objcnt.c
@@ -130,11 +130,3 @@ void sctp_dbg_objcnt_init(struct net *net)
if (!ent)
pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n");
}
-
-/* Cleanup the objcount entry in the proc filesystem. */
-void sctp_dbg_objcnt_exit(struct net *net)
-{
- remove_proc_entry("sctp_dbg_objcnt", net->sctp.proc_net_sctp);
-}
-
-
diff --git a/net/sctp/proc.c b/net/sctp/proc.c
index 537545ebcb0e..17d0155d9de3 100644
--- a/net/sctp/proc.c
+++ b/net/sctp/proc.c
@@ -101,25 +101,6 @@ static const struct file_operations sctp_snmp_seq_fops = {
.release = single_release_net,
};
-/* Set up the proc fs entry for 'snmp' object. */
-int __net_init sctp_snmp_proc_init(struct net *net)
-{
- struct proc_dir_entry *p;
-
- p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
- &sctp_snmp_seq_fops);
- if (!p)
- return -ENOMEM;
-
- return 0;
-}
-
-/* Cleanup the proc fs entry for 'snmp' object. */
-void sctp_snmp_proc_exit(struct net *net)
-{
- remove_proc_entry("snmp", net->sctp.proc_net_sctp);
-}
-
/* Dump local addresses of an association/endpoint. */
static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
{
@@ -259,25 +240,6 @@ static const struct file_operations sctp_eps_seq_fops = {
.release = seq_release_net,
};
-/* Set up the proc fs entry for 'eps' object. */
-int __net_init sctp_eps_proc_init(struct net *net)
-{
- struct proc_dir_entry *p;
-
- p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
- &sctp_eps_seq_fops);
- if (!p)
- return -ENOMEM;
-
- return 0;
-}
-
-/* Cleanup the proc fs entry for 'eps' object. */
-void sctp_eps_proc_exit(struct net *net)
-{
- remove_proc_entry("eps", net->sctp.proc_net_sctp);
-}
-
struct sctp_ht_iter {
struct seq_net_private p;
struct rhashtable_iter hti;
@@ -390,25 +352,6 @@ static const struct file_operations sctp_assocs_seq_fops = {
.release = seq_release_net,
};
-/* Set up the proc fs entry for 'assocs' object. */
-int __net_init sctp_assocs_proc_init(struct net *net)
-{
- struct proc_dir_entry *p;
-
- p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
- &sctp_assocs_seq_fops);
- if (!p)
- return -ENOMEM;
-
- return 0;
-}
-
-/* Cleanup the proc fs entry for 'assocs' object. */
-void sctp_assocs_proc_exit(struct net *net)
-{
- remove_proc_entry("assocs", net->sctp.proc_net_sctp);
-}
-
static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
{
struct sctp_association *assoc;
@@ -488,12 +431,6 @@ static const struct seq_operations sctp_remaddr_ops = {
.show = sctp_remaddr_seq_show,
};
-/* Cleanup the proc fs entry for 'remaddr' object. */
-void sctp_remaddr_proc_exit(struct net *net)
-{
- remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
-}
-
static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
{
return seq_open_net(inode, file, &sctp_remaddr_ops,
@@ -507,13 +444,28 @@ static const struct file_operations sctp_remaddr_seq_fops = {
.release = seq_release_net,
};
-int __net_init sctp_remaddr_proc_init(struct net *net)
+/* Set up the proc fs entry for the SCTP protocol. */
+int __net_init sctp_proc_init(struct net *net)
{
- struct proc_dir_entry *p;
-
- p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
- &sctp_remaddr_seq_fops);
- if (!p)
+ net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
+ if (!net->sctp.proc_net_sctp)
return -ENOMEM;
+ if (!proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
+ &sctp_snmp_seq_fops))
+ goto cleanup;
+ if (!proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
+ &sctp_eps_seq_fops))
+ goto cleanup;
+ if (!proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
+ &sctp_assocs_seq_fops))
+ goto cleanup;
+ if (!proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
+ &sctp_remaddr_seq_fops))
+ goto cleanup;
return 0;
+
+cleanup:
+ remove_proc_subtree("sctp", net->proc_net);
+ net->sctp.proc_net_sctp = NULL;
+ return -ENOMEM;
}
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 606361ee9e4a..493b817f6a2a 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -80,56 +80,6 @@ long sysctl_sctp_mem[3];
int sysctl_sctp_rmem[3];
int sysctl_sctp_wmem[3];
-/* Set up the proc fs entry for the SCTP protocol. */
-static int __net_init sctp_proc_init(struct net *net)
-{
-#ifdef CONFIG_PROC_FS
- net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
- if (!net->sctp.proc_net_sctp)
- goto out_proc_net_sctp;
- if (sctp_snmp_proc_init(net))
- goto out_snmp_proc_init;
- if (sctp_eps_proc_init(net))
- goto out_eps_proc_init;
- if (sctp_assocs_proc_init(net))
- goto out_assocs_proc_init;
- if (sctp_remaddr_proc_init(net))
- goto out_remaddr_proc_init;
-
- return 0;
-
-out_remaddr_proc_init:
- sctp_assocs_proc_exit(net);
-out_assocs_proc_init:
- sctp_eps_proc_exit(net);
-out_eps_proc_init:
- sctp_snmp_proc_exit(net);
-out_snmp_proc_init:
- remove_proc_entry("sctp", net->proc_net);
- net->sctp.proc_net_sctp = NULL;
-out_proc_net_sctp:
- return -ENOMEM;
-#endif /* CONFIG_PROC_FS */
- return 0;
-}
-
-/* Clean up the proc fs entry for the SCTP protocol.
- * Note: Do not make this __exit as it is used in the init error
- * path.
- */
-static void sctp_proc_exit(struct net *net)
-{
-#ifdef CONFIG_PROC_FS
- sctp_snmp_proc_exit(net);
- sctp_eps_proc_exit(net);
- sctp_assocs_proc_exit(net);
- sctp_remaddr_proc_exit(net);
-
- remove_proc_entry("sctp", net->proc_net);
- net->sctp.proc_net_sctp = NULL;
-#endif
-}
-
/* Private helper to extract ipv4 address and stash them in
* the protocol structure.
*/
@@ -1285,10 +1235,12 @@ static int __net_init sctp_defaults_init(struct net *net)
if (status)
goto err_init_mibs;
+#ifdef CONFIG_PROC_FS
/* Initialize proc fs directory. */
status = sctp_proc_init(net);
if (status)
goto err_init_proc;
+#endif
sctp_dbg_objcnt_init(net);
@@ -1320,9 +1272,10 @@ static void __net_exit sctp_defaults_exit(struct net *net)
sctp_free_addr_wq(net);
sctp_free_local_addr_list(net);
- sctp_dbg_objcnt_exit(net);
-
- sctp_proc_exit(net);
+#ifdef CONFIG_PROC_FS
+ remove_proc_subtree("sctp", net->proc_net);
+ net->sctp.proc_net_sctp = NULL;
+#endif
cleanup_sctp_mibs(net);
sctp_sysctl_net_unregister(net);
}
Powered by blists - more mailing lists