- 30 4月, 2013 1 次提交
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由 Al Viro 提交于
... if not since 0.99 or so. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 10 4月, 2013 5 次提交
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由 Al Viro 提交于
use proc_create_data() rather than set ->data after the file has been created Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
... and don't bother with ->owner, while we are at it - procfs fops do not need it. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
The only part of proc_dir_entry the code outside of fs/proc really cares about is PDE(inode)->data. Provide a helper for that; static inline for now, eventually will be moved to fs/proc, along with the knowledge of struct proc_dir_entry layout. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 27 3月, 2013 2 次提交
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由 Pravin B Shelar 提交于
ip-header id needs to be incremented even if IP_DF flag is set. This behaviour was changed in commit 490ab081 (IP_GRE: Fix IP-Identification). Following patch fixes it so that identification is always incremented. Reported-by: NCong Wang <amwang@redhat.com> Signed-off-by: NPravin B Shelar <pshelar@nicira.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 dingtianhong 提交于
SCM_SCREDENTIALS should apply to write() syscalls only either source or destination socket asserted SOCK_PASSCRED. The original implememtation in maybe_add_creds is wrong, and breaks several LSB testcases ( i.e. /tset/LSB.os/netowkr/recvfrom/T.recvfrom). Origionally-authored-by: NKarel Srot <ksrot@redhat.com> Signed-off-by: NDing Tianhong <dingtianhong@huawei.com> Acked-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 26 3月, 2013 2 次提交
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由 Hong Zhiguo 提交于
Signed-off-by: NHong Zhiguo <honkiko@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Paul Moore 提交于
As reported by Jan, and others over the past few years, there is a race condition caused by unix_release setting the sock->sk pointer to NULL before properly marking the socket as dead/orphaned. This can cause a problem with the LSM hook security_unix_may_send() if there is another socket attempting to write to this partially released socket in between when sock->sk is set to NULL and it is marked as dead/orphaned. This patch fixes this by only setting sock->sk to NULL after the socket has been marked as dead; I also take the opportunity to make unix_release_sock() a void function as it only ever returned 0/success. Dave, I think this one should go on the -stable pile. Special thanks to Jan for coming up with a reproducer for this problem. Reported-by: NJan Stancek <jan.stancek@gmail.com> Signed-off-by: NPaul Moore <pmoore@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 25 3月, 2013 5 次提交
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由 Trond Myklebust 提交于
We need to be careful when testing task->tk_waitqueue in rpc_wake_up_task_queue_locked, because it can be changed while we are holding the queue->lock. By adding appropriate memory barriers, we can ensure that it is safe to test task->tk_waitqueue for equality if the RPC_TASK_QUEUED bit is set. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@vger.kernel.org
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由 Yuchung Cheng 提交于
On SACK reneging the sender immediately retransmits and forces a timeout but disables Eifel (undo). If the (buggy) receiver does not drop any packet this can trigger a false slow-start retransmit storm driven by the ACKs of the original packets. This can be detected with undo and TCP timestamps. Signed-off-by: NYuchung Cheng <ycheng@google.com> Acked-by: NNeal Cardwell <ncardwell@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Hong zhi guo 提交于
When I tried to set mac address of a bridge interface to a mac address which already learned on this bridge, I got system hang. The cause is straight forward: function br_fdb_change_mac_address calls fdb_insert with NULL source nbp. Then an fdb lookup is performed. If an fdb entry is found and it's local, it's OK. But if it's not local, source is dereferenced for printk without NULL check. Signed-off-by: NHong Zhiguo <honkiko@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Cong Wang 提交于
vlan_vid_del() could possibly free ->vlan_info after a RCU grace period, however, we may still refer to the freed memory area by 'grp' pointer. Found by code inspection. This patch moves vlan_vid_del() as behind as possible. Cc: Patrick McHardy <kaber@trash.net> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: NCong Wang <amwang@redhat.com> Acked-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
The WARN_ON(in_interrupt()) in net_enable_timestamp() can get false positive, in socket clone path, run from softirq context : [ 3641.624425] WARNING: at net/core/dev.c:1532 net_enable_timestamp+0x7b/0x80() [ 3641.668811] Call Trace: [ 3641.671254] <IRQ> [<ffffffff80286817>] warn_slowpath_common+0x87/0xc0 [ 3641.677871] [<ffffffff8028686a>] warn_slowpath_null+0x1a/0x20 [ 3641.683683] [<ffffffff80742f8b>] net_enable_timestamp+0x7b/0x80 [ 3641.689668] [<ffffffff80732ce5>] sk_clone_lock+0x425/0x450 [ 3641.695222] [<ffffffff8078db36>] inet_csk_clone_lock+0x16/0x170 [ 3641.701213] [<ffffffff807ae449>] tcp_create_openreq_child+0x29/0x820 [ 3641.707663] [<ffffffff807d62e2>] ? ipt_do_table+0x222/0x670 [ 3641.713354] [<ffffffff807aaf5b>] tcp_v4_syn_recv_sock+0xab/0x3d0 [ 3641.719425] [<ffffffff807af63a>] tcp_check_req+0x3da/0x530 [ 3641.724979] [<ffffffff8078b400>] ? inet_hashinfo_init+0x60/0x80 [ 3641.730964] [<ffffffff807ade6f>] ? tcp_v4_rcv+0x79f/0xbe0 [ 3641.736430] [<ffffffff807ab9bd>] tcp_v4_do_rcv+0x38d/0x4f0 [ 3641.741985] [<ffffffff807ae14a>] tcp_v4_rcv+0xa7a/0xbe0 Its safe at this point because the parent socket owns a reference on the netstamp_needed, so we cant have a 0 -> 1 transition, which requires to lock a mutex. Instead of refining the check, lets remove it, as all known callers are safe. If it ever changes in the future, static_key_slow_inc() will complain anyway. Reported-by: NLaurent Chavey <chavey@google.com> Signed-off-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 22 3月, 2013 1 次提交
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由 Eric Dumazet 提交于
A long standing problem with TSO is the fact that tcp_tso_should_defer() rearms the deferred timer, while it should not. Current code leads to following bad bursty behavior : 20:11:24.484333 IP A > B: . 297161:316921(19760) ack 1 win 119 20:11:24.484337 IP B > A: . ack 263721 win 1117 20:11:24.485086 IP B > A: . ack 265241 win 1117 20:11:24.485925 IP B > A: . ack 266761 win 1117 20:11:24.486759 IP B > A: . ack 268281 win 1117 20:11:24.487594 IP B > A: . ack 269801 win 1117 20:11:24.488430 IP B > A: . ack 271321 win 1117 20:11:24.489267 IP B > A: . ack 272841 win 1117 20:11:24.490104 IP B > A: . ack 274361 win 1117 20:11:24.490939 IP B > A: . ack 275881 win 1117 20:11:24.491775 IP B > A: . ack 277401 win 1117 20:11:24.491784 IP A > B: . 316921:332881(15960) ack 1 win 119 20:11:24.492620 IP B > A: . ack 278921 win 1117 20:11:24.493448 IP B > A: . ack 280441 win 1117 20:11:24.494286 IP B > A: . ack 281961 win 1117 20:11:24.495122 IP B > A: . ack 283481 win 1117 20:11:24.495958 IP B > A: . ack 285001 win 1117 20:11:24.496791 IP B > A: . ack 286521 win 1117 20:11:24.497628 IP B > A: . ack 288041 win 1117 20:11:24.498459 IP B > A: . ack 289561 win 1117 20:11:24.499296 IP B > A: . ack 291081 win 1117 20:11:24.500133 IP B > A: . ack 292601 win 1117 20:11:24.500970 IP B > A: . ack 294121 win 1117 20:11:24.501388 IP B > A: . ack 295641 win 1117 20:11:24.501398 IP A > B: . 332881:351881(19000) ack 1 win 119 While the expected behavior is more like : 20:19:49.259620 IP A > B: . 197601:202161(4560) ack 1 win 119 20:19:49.260446 IP B > A: . ack 154281 win 1212 20:19:49.261282 IP B > A: . ack 155801 win 1212 20:19:49.262125 IP B > A: . ack 157321 win 1212 20:19:49.262136 IP A > B: . 202161:206721(4560) ack 1 win 119 20:19:49.262958 IP B > A: . ack 158841 win 1212 20:19:49.263795 IP B > A: . ack 160361 win 1212 20:19:49.264628 IP B > A: . ack 161881 win 1212 20:19:49.264637 IP A > B: . 206721:211281(4560) ack 1 win 119 20:19:49.265465 IP B > A: . ack 163401 win 1212 20:19:49.265886 IP B > A: . ack 164921 win 1212 20:19:49.266722 IP B > A: . ack 166441 win 1212 20:19:49.266732 IP A > B: . 211281:215841(4560) ack 1 win 119 20:19:49.267559 IP B > A: . ack 167961 win 1212 20:19:49.268394 IP B > A: . ack 169481 win 1212 20:19:49.269232 IP B > A: . ack 171001 win 1212 20:19:49.269241 IP A > B: . 215841:221161(5320) ack 1 win 119 Signed-off-by: NEric Dumazet <edumazet@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Van Jacobson <vanj@google.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: Nandita Dukkipati <nanditad@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 21 3月, 2013 16 次提交
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由 Kees Cook 提交于
This makes sure that release_sock is called for all error conditions in irda_getsockopt. Signed-off-by: NKees Cook <keescook@chromium.org> Reported-by: NBrad Spengler <spender@grsecurity.net> Cc: stable@vger.kernel.org Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Martin Fuzzey 提交于
When using ipconfig the logs currently look like: Single name server: [ 3.467270] IP-Config: Complete: [ 3.470613] device=eth0, hwaddr=ac:de:48:00:00:01, ipaddr=172.16.42.2, mask=255.255.255.0, gw=172.16.42.1 [ 3.480670] host=infigo-1, domain=, nis-domain=(none) [ 3.486166] bootserver=172.16.42.1, rootserver=172.16.42.1, rootpath= [ 3.492910] nameserver0=172.16.42.1[ 3.496853] ALSA device list: Three name servers: [ 3.496949] IP-Config: Complete: [ 3.500293] device=eth0, hwaddr=ac:de:48:00:00:01, ipaddr=172.16.42.2, mask=255.255.255.0, gw=172.16.42.1 [ 3.510367] host=infigo-1, domain=, nis-domain=(none) [ 3.515864] bootserver=172.16.42.1, rootserver=172.16.42.1, rootpath= [ 3.522635] nameserver0=172.16.42.1, nameserver1=172.16.42.100 [ 3.529149] , nameserver2=172.16.42.200 Fix newline handling for these cases Signed-off-by: NMartin Fuzzey <mfuzzey@parkeon.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Daniel Borkmann 提交于
In skb_flow_dissect(), we perform a dissection of a skbuff. Since we're doing the work here anyway, also store thoff for a later usage, e.g. in the BPF filter. Suggested-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDaniel Borkmann <dborkman@redhat.com> Signed-off-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
If we postpone unhashing of l2tp sessions until the structure is freed, we risk: 1. further packets arriving and getting queued while the pseudowire is being closed down 2. the recv path hitting "scheduling while atomic" errors in the case that recv drops the last reference to a session and calls l2tp_session_free while in atomic context As such, l2tp sessions should be unhashed from l2tp_core data structures early in the teardown process prior to calling pseudowire close. For pseudowires like l2tp_ppp which have multiple shutdown codepaths, provide an unhash hook. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
l2tp's u64_stats writers were incorrectly synchronised, making it possible to deadlock a 64bit machine running a 32bit kernel simply by sending the l2tp code netlink commands while passing data through l2tp sessions. Previous discussion on netdev determined that alternative solutions such as spinlock writer synchronisation or per-cpu data would bring unjustified overhead, given that most users interested in high volume traffic will likely be running 64bit kernels on 64bit hardware. As such, this patch replaces l2tp's use of u64_stats with atomic_long_t, thereby avoiding the deadlock. Ref: http://marc.info/?l=linux-netdev&m=134029167910731&w=2 http://marc.info/?l=linux-netdev&m=134079868111131&w=2Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
If userspace deletes a ppp pseudowire using the netlink API, either by directly deleting the session or by deleting the tunnel that contains the session, we need to tear down the corresponding pppox channel. Rather than trying to manage two pppox unbind codepaths, switch the netlink and l2tp_core session_close handlers to close via. the l2tp_ppp socket .release handler. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
Add calls to l2tp_session_queue_purge as a part of l2tp_tunnel_closeall and l2tp_session_delete. Pseudowire implementations which are deleted only via. l2tp_core l2tp_session_delete calls can dispense with their own code for flushing the reorder queue. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
If an l2tp session is deleted, it is necessary to delete skbs in-flight on the session's reorder queue before taking it down. Rather than having each pseudowire implementation reaching into the l2tp_session struct to handle this itself, provide a function in l2tp_core to purge the session queue. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
It is valid for an existing struct sock object to have a NULL sk_socket pointer, so don't BUG_ON in l2tp_tunnel_del_work if that should occur. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
When looking up the tunnel socket in struct l2tp_tunnel, hold a reference whether the socket was created by the kernel or by userspace. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
When a user deletes a tunnel using netlink, all the sessions in the tunnel should also be deleted. Since running sessions will pin the tunnel socket with the references they hold, have the l2tp_tunnel_delete close all sessions in a tunnel before finally closing the tunnel socket. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
l2tp_core hooks UDP's .destroy handler to gain advance warning of a tunnel socket being closed from userspace. We need to do the same thing for IP-encapsulation sockets. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
l2tp_core internally uses l2tp_tunnel_closeall to close all sessions in a tunnel when a UDP-encapsulation socket is destroyed. We need to do something similar for IP-encapsulation sockets. Export l2tp_tunnel_closeall as a GPL symbol to enable l2tp_ip and l2tp_ip6 to call it from their .destroy handlers. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
L2TP sessions hold a reference to the tunnel socket to prevent it going away while sessions are still active. However, since tunnel destruction is handled by the sock sk_destruct callback there is a catch-22: a tunnel with sessions cannot be deleted since each session holds a reference to the tunnel socket. If userspace closes a managed tunnel socket, or dies, the tunnel will persist and it will be neccessary to individually delete the sessions using netlink commands. This is ugly. To prevent this occuring, this patch leverages the udp encapsulation socket destroy callback to gain early notification when the tunnel socket is closed. This allows us to safely close the sessions running in the tunnel, dropping the tunnel socket references in the process. The tunnel socket is then destroyed as normal, and the tunnel resources deallocated in sk_destruct. While we're at it, ensure that l2tp_tunnel_closeall correctly drops session references to allow the sessions to be deleted rather than leaking. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Tom Parkin 提交于
Users of udp encapsulation currently have an encap_rcv callback which they can use to hook into the udp receive path. In situations where a encapsulation user allocates resources associated with a udp encap socket, it may be convenient to be able to also hook the proto .destroy operation. For example, if an encap user holds a reference to the udp socket, the destroy hook might be used to relinquish this reference. This patch adds a socket destroy hook into udp, which is set and enabled in the same way as the existing encap_rcv hook. Signed-off-by: NTom Parkin <tparkin@katalix.com> Signed-off-by: NJames Chapman <jchapman@katalix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Masatake YAMATO 提交于
Trigger BUG_ON if a group name is longer than GENL_NAMSIZ. Signed-off-by: NMasatake YAMATO <yamato@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 20 3月, 2013 1 次提交
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由 Paul Bolle 提交于
Kconfig symbol IP_NF_QUEUE is unused since commit d16cf20e ("netfilter: remove ip_queue support"). Let's remove it too. Signed-off-by: NPaul Bolle <pebolle@tiscali.nl> Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
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- 19 3月, 2013 5 次提交
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由 Hannes Frederic Sowa 提交于
This patch introduces a constant limit of the fragment queue hash table bucket list lengths. Currently the limit 128 is choosen somewhat arbitrary and just ensures that we can fill up the fragment cache with empty packets up to the default ip_frag_high_thresh limits. It should just protect from list iteration eating considerable amounts of cpu. If we reach the maximum length in one hash bucket a warning is printed. This is implemented on the caller side of inet_frag_find to distinguish between the different users of inet_fragment.c. I dropped the out of memory warning in the ipv4 fragment lookup path, because we already get a warning by the slab allocator. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Jesper Dangaard Brouer <jbrouer@redhat.com> Signed-off-by: NHannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Julian Anastasov 提交于
In 3.7 we added code that uses ipv4_update_pmtu but after commit c5ae7d41 (ipv4: must use rcu protection while calling fib_lookup) the RCU lock is not needed. Signed-off-by: NJulian Anastasov <ja@ssi.bg> Signed-off-by: NSimon Horman <horms@verge.net.au>
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由 Julian Anastasov 提交于
Dmitry Akindinov is reporting for a problem where SYNs are looping between the master and backup server when the backup server is used as real server in DR mode and has IPVS rules to function as director. Even when the backup function is enabled we continue to forward traffic and schedule new connections when the current master is using the backup server as real server. While this is not a problem for NAT, for DR and TUN method the backup server can not determine if a request comes from client or from director. To avoid such loops add new sysctl flag backup_only. It can be needed for DR/TUN setups that do not need backup and director function at the same time. When the backup function is enabled we stop any forwarding and pass the traffic to the local stack (real server mode). The flag disables the director function when the backup function is enabled. For setups that enable backup function for some virtual services and director function for other virtual services there should be another more complex solution to support DR/TUN mode, may be to assign per-virtual service syncid value, so that we can differentiate the requests. Reported-by: NDmitry Akindinov <dimak@stalker.com> Tested-by: NGerman Myzovsky <lawyer@sipnet.ru> Signed-off-by: NJulian Anastasov <ja@ssi.bg> Signed-off-by: NSimon Horman <horms@verge.net.au>
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由 Julian Anastasov 提交于
Fix wrong but non-fatal access to chunk length. sch->length should be in network order, next chunk should be aligned to 4 bytes. Problem noticed in sparse output. Signed-off-by: NJulian Anastasov <ja@ssi.bg> Signed-off-by: NSimon Horman <horms@verge.net.au>
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由 Eric Dumazet 提交于
When an ICMP ICMP_FRAG_NEEDED (or ICMPV6_PKT_TOOBIG) message finds a LISTEN socket, and this socket is currently owned by the user, we set TCP_MTU_REDUCED_DEFERRED flag in listener tsq_flags. This is bad because if we clone the parent before it had a chance to clear the flag, the child inherits the tsq_flags value, and next tcp_release_cb() on the child will decrement sk_refcnt. Result is that we might free a live TCP socket, as reported by Dormando. IPv4: Attempt to release TCP socket in state 1 Fix this issue by testing sk_state against TCP_LISTEN early, so that we set TCP_MTU_REDUCED_DEFERRED on appropriate sockets (not a LISTEN one) This bug was introduced in commit 563d34d0 (tcp: dont drop MTU reduction indications) Reported-by: Ndormando <dormando@rydia.net> Signed-off-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 18 3月, 2013 1 次提交
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由 Vlad Yasevich 提交于
Most of the support was already there. The only thing that was missing was the call to set the flag. Add this call. Signed-off-by: NVlad Yasevich <vyasevic@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 17 3月, 2013 1 次提交
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由 Vlad Yasevich 提交于
Range/validity checks on rta_type in rtnetlink_rcv_msg() do not account for flags that may be set. This causes the function to return -EINVAL when flags are set on the type (for example NLA_F_NESTED). Signed-off-by: NVlad Yasevich <vyasevic@redhat.com> Acked-by: NThomas Graf <tgraf@suug.ch> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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