| Commit message (Collapse) | Author | Age | Files | Lines |
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Pull more networking fixes from David Miller:
1) Eric Dumazet discovered and fixed what turned out to be a family of
bugs. These functions were using pskb_may_pull() which might need
to reallocate the linear SKB data buffer, but the callers were not
expecting this possibility. The callers have cached pointers to the
packet header areas, and would need to reload them if we were to
continue using pskb_may_pull().
So they could end up reading garbage.
It's easier to just change these RAW4/RAW6/MIP6 routines to use
skb_header_pointer() instead of pskb_may_pull(), which won't modify
the linear SKB data area.
2) Dave Jone's syscall spammer caught a case where a non-TCP socket can
call down into the TCP keepalive code. The case basically involves
creating a raw socket with sk_protocol == IPPROTO_TCP, then calling
setsockopt(sock_fd, SO_KEEPALIVE, ...)
Fixed by Eric Dumazet.
3) Bluetooth devices do not get configured properly while being powered
on, resulting in always using legacy pairing instead of SSP. Fix
from Andrzej Kaczmarek.
4) Bluetooth cancels delayed work erroneously, put stricter checks in
place. From Andrei Emeltchenko.
5) Fix deadlock between cfg80211_mutex and reg_regdb_search_mutex in
cfg80211, from Luis R. Rodriguez.
6) Fix interrupt double release in iwlwifi, from Emmanuel Grumbach.
7) Missing module license in bcm87xx driver, from Peter Huewe.
8) Team driver can lose port changed events when adding devices to a
team, fix from Jiri Pirko.
9) Fix endless loop when trying ot unregister PPPOE device in zombie
state, from Xiaodong Xu.
10) batman-adv layer needs to set MAC address of software device
earlier, otherwise we call tt_local_add with it uninitialized.
11) Fix handling of KSZ8021 PHYs, it's matched currently by KS8051 but
that doesn't program the device properly. From Marek Vasut.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
ipv6: mip6: fix mip6_mh_filter()
ipv6: raw: fix icmpv6_filter()
net: guard tcp_set_keepalive() to tcp sockets
phy/micrel: Add missing header to micrel_phy.h
phy/micrel: Rename KS80xx to KSZ80xx
phy/micrel: Implement support for KSZ8021
batman-adv: Fix symmetry check / route flapping in multi interface setups
batman-adv: Fix change mac address of soft iface.
pppoe: drop PPPOX_ZOMBIEs in pppoe_release
team: send port changed when added
ipv4: raw: fix icmp_filter()
net/phy/bcm87xx: Add MODULE_LICENSE("GPL") to GPL driver
iwlwifi: don't double free the interrupt in failure path
cfg80211: fix possible circular lock on reg_regdb_search()
Bluetooth: Fix not removing power_off delayed work
Bluetooth: Fix freeing uninitialized delayed works
Bluetooth: mgmt: Fix enabling LE while powered off
Bluetooth: mgmt: Fix enabling SSP while powered off
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mip6_mh_filter() should not modify its input, or else its caller
would need to recompute ipv6_hdr() if skb->head is reallocated.
Use skb_header_pointer() instead of pskb_may_pull()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Included fixes:
- fix the behaviour of batman-adv in case of virtual interface MAC change event
- fix symmetric link check in neighbour selection
Signed-off-by: David S. Miller <davem@davemloft.net>
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If receiving an OGM from a neighbor other than the currently selected
and if it has the same TQ then we are supposed to switch if this
neighbor provides a more symmetric link than the currently selected one.
However this symmetry check currently is broken if the interface of the
neighbor we received the OGM from and the one of the currently selected
neighbor differ: We are currently trying to determine the symmetry of the
link towards the selected router via the link we received the OGM from
instead of just checking via the link towards the currently selected
router.
This leads to way more route switches than necessary and can lead to
permanent route flapping in many common multi interface setups.
This patch fixes this issue by using the right interface for this
symmetry check.
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
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Into function interface_set_mac_addr, the function tt_local_add was
invoked before updating dev->dev_addr. The new MAC address was not
tagged as NoPurge.
Signed-off-by: Def <def@laposte.net>
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icmpv6_filter() should not modify its input, or else its caller
would need to recompute ipv6_hdr() if skb->head is reallocated.
Use skb_header_pointer() instead of pskb_may_pull() and
change the prototype to make clear both sk and skb are const.
Also, if icmpv6 header cannot be found, do not deliver the packet,
as we do in IPv4.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
John W. Linville says:
====================
Please pull this last(?) batch of fixes intended for 3.6...
For the Bluetooth bits, Gustavo says this:
"Here goes probably my last update to 3.6. It includes the two patches
you were ok last week(from Andrzej Kaczmarek), those are critical
ones, and two other fixes one for a system crash and the other for
a missing lockdep annotation."
The referenced fixes from Andrzej prevent attempts to configure devices
that are powered-off.
Along with the Bluetooth fixes, there are a couple of 802.11 fixes.
Emmanuel Grumbach gives us an iwlwifi fix to prevent releasing an
interrupt twice. Luis R. Rodriguez provides a fix for a possible
circular lock dependency in the cfg80211 regulatory enforcement code.
All of these have been in linux-next for a few days. I hope they are
not too late to make the 3.6 release!
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
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When call_crda() is called we kick off a witch hunt search
for the same regulatory domain on our internal regulatory
database and that work gets kicked off on a workqueue, this
is done while the cfg80211_mutex is held. If that workqueue
kicks off it will first lock reg_regdb_search_mutex and
later cfg80211_mutex but to ensure two CPUs will not contend
against cfg80211_mutex the right thing to do is to have the
reg_regdb_search() wait until the cfg80211_mutex is let go.
The lockdep report is pasted below.
cfg80211: Calling CRDA to update world regulatory domain
======================================================
[ INFO: possible circular locking dependency detected ]
3.3.8 #3 Tainted: G O
-------------------------------------------------------
kworker/0:1/235 is trying to acquire lock:
(cfg80211_mutex){+.+...}, at: [<816468a4>] set_regdom+0x78c/0x808 [cfg80211]
but task is already holding lock:
(reg_regdb_search_mutex){+.+...}, at: [<81646828>] set_regdom+0x710/0x808 [cfg80211]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (reg_regdb_search_mutex){+.+...}:
[<800a8384>] lock_acquire+0x60/0x88
[<802950a8>] mutex_lock_nested+0x54/0x31c
[<81645778>] is_world_regdom+0x9f8/0xc74 [cfg80211]
-> #1 (reg_mutex#2){+.+...}:
[<800a8384>] lock_acquire+0x60/0x88
[<802950a8>] mutex_lock_nested+0x54/0x31c
[<8164539c>] is_world_regdom+0x61c/0xc74 [cfg80211]
-> #0 (cfg80211_mutex){+.+...}:
[<800a77b8>] __lock_acquire+0x10d4/0x17bc
[<800a8384>] lock_acquire+0x60/0x88
[<802950a8>] mutex_lock_nested+0x54/0x31c
[<816468a4>] set_regdom+0x78c/0x808 [cfg80211]
other info that might help us debug this:
Chain exists of:
cfg80211_mutex --> reg_mutex#2 --> reg_regdb_search_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(reg_regdb_search_mutex);
lock(reg_mutex#2);
lock(reg_regdb_search_mutex);
lock(cfg80211_mutex);
*** DEADLOCK ***
3 locks held by kworker/0:1/235:
#0: (events){.+.+..}, at: [<80089a00>] process_one_work+0x230/0x460
#1: (reg_regdb_work){+.+...}, at: [<80089a00>] process_one_work+0x230/0x460
#2: (reg_regdb_search_mutex){+.+...}, at: [<81646828>] set_regdom+0x710/0x808 [cfg80211]
stack backtrace:
Call Trace:
[<80290fd4>] dump_stack+0x8/0x34
[<80291bc4>] print_circular_bug+0x2ac/0x2d8
[<800a77b8>] __lock_acquire+0x10d4/0x17bc
[<800a8384>] lock_acquire+0x60/0x88
[<802950a8>] mutex_lock_nested+0x54/0x31c
[<816468a4>] set_regdom+0x78c/0x808 [cfg80211]
Reported-by: Felix Fietkau <nbd@openwrt.org>
Tested-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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For example, when a usb reset is received (I could reproduce it
running something very similar to this[1] in a loop) it could be
that the device is unregistered while the power_off delayed work
is still scheduled to run.
Backtrace:
WARNING: at lib/debugobjects.c:261 debug_print_object+0x7c/0x8d()
Hardware name: To Be Filled By O.E.M.
ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x26
Modules linked in: nouveau mxm_wmi btusb wmi bluetooth ttm coretemp drm_kms_helper
Pid: 2114, comm: usb-reset Not tainted 3.5.0bt-next #2
Call Trace:
[<ffffffff8124cc00>] ? free_obj_work+0x57/0x91
[<ffffffff81058f88>] warn_slowpath_common+0x7e/0x97
[<ffffffff81059035>] warn_slowpath_fmt+0x41/0x43
[<ffffffff8124ccb6>] debug_print_object+0x7c/0x8d
[<ffffffff8106e3ec>] ? __queue_work+0x259/0x259
[<ffffffff8124d63e>] ? debug_check_no_obj_freed+0x6f/0x1b5
[<ffffffff8124d667>] debug_check_no_obj_freed+0x98/0x1b5
[<ffffffffa00aa031>] ? bt_host_release+0x10/0x1e [bluetooth]
[<ffffffff810fc035>] kfree+0x90/0xe6
[<ffffffffa00aa031>] bt_host_release+0x10/0x1e [bluetooth]
[<ffffffff812ec2f9>] device_release+0x4a/0x7e
[<ffffffff8123ef57>] kobject_release+0x11d/0x154
[<ffffffff8123ed98>] kobject_put+0x4a/0x4f
[<ffffffff812ec0d9>] put_device+0x12/0x14
[<ffffffffa009472b>] hci_free_dev+0x22/0x26 [bluetooth]
[<ffffffffa0280dd0>] btusb_disconnect+0x96/0x9f [btusb]
[<ffffffff813581b4>] usb_unbind_interface+0x57/0x106
[<ffffffff812ef988>] __device_release_driver+0x83/0xd6
[<ffffffff812ef9fb>] device_release_driver+0x20/0x2d
[<ffffffff813582a7>] usb_driver_release_interface+0x44/0x7b
[<ffffffff81358795>] usb_forced_unbind_intf+0x45/0x4e
[<ffffffff8134f959>] usb_reset_device+0xa6/0x12e
[<ffffffff8135df86>] usbdev_do_ioctl+0x319/0xe20
[<ffffffff81203244>] ? avc_has_perm_flags+0xc9/0x12e
[<ffffffff812031a0>] ? avc_has_perm_flags+0x25/0x12e
[<ffffffff81050101>] ? do_page_fault+0x31e/0x3a1
[<ffffffff8135eaa6>] usbdev_ioctl+0x9/0xd
[<ffffffff811126b1>] vfs_ioctl+0x21/0x34
[<ffffffff81112f7b>] do_vfs_ioctl+0x408/0x44b
[<ffffffff81208d45>] ? file_has_perm+0x76/0x81
[<ffffffff8111300f>] sys_ioctl+0x51/0x76
[<ffffffff8158db22>] system_call_fastpath+0x16/0x1b
[1] http://cpansearch.perl.org/src/DPAVLIN/Biblio-RFID-0.03/examples/usbreset.c
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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When releasing L2CAP socket which is in BT_CONFIG state l2cap_chan_close
invokes l2cap_send_disconn_req which cancel delayed works which are only
set in BT_CONNECTED state with l2cap_ertm_init. Add state check before
cancelling those works.
...
[ 9668.574372] [21085] l2cap_sock_release: sock cd065200, sk f073e800
[ 9668.574399] [21085] l2cap_sock_shutdown: sock cd065200, sk f073e800
[ 9668.574411] [21085] l2cap_chan_close: chan f073ec00 state BT_CONFIG sk f073e800
[ 9668.574421] [21085] l2cap_send_disconn_req: chan f073ec00 conn ecc16600
[ 9668.574441] INFO: trying to register non-static key.
[ 9668.574443] the code is fine but needs lockdep annotation.
[ 9668.574446] turning off the locking correctness validator.
[ 9668.574450] Pid: 21085, comm: obex-client Tainted: G O 3.5.0+ #57
[ 9668.574452] Call Trace:
[ 9668.574463] [<c10a64b3>] __lock_acquire+0x12e3/0x1700
[ 9668.574468] [<c10a44fb>] ? trace_hardirqs_on+0xb/0x10
[ 9668.574476] [<c15e4f60>] ? printk+0x4d/0x4f
[ 9668.574479] [<c10a6e38>] lock_acquire+0x88/0x130
[ 9668.574487] [<c1059740>] ? try_to_del_timer_sync+0x60/0x60
[ 9668.574491] [<c1059790>] del_timer_sync+0x50/0xc0
[ 9668.574495] [<c1059740>] ? try_to_del_timer_sync+0x60/0x60
[ 9668.574515] [<f8aa1c23>] l2cap_send_disconn_req+0xe3/0x160 [bluetooth]
...
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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When new BT USB adapter is plugged in it's configured while still being powered
off (HCI_AUTO_OFF flag is set), thus Set LE will only set dev_flags but won't
write changes to controller. As a result it's not possible to start device
discovery session on LE controller as it uses interleaved discovery which
requires LE Supported Host flag in extended features.
This patch ensures HCI Write LE Host Supported is sent when Set Powered is
called to power on controller and clear HCI_AUTO_OFF flag.
Signed-off-by: Andrzej Kaczmarek <andrzej.kaczmarek@tieto.com>
Cc: stable@vger.kernel.org
Acked-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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When new BT USB adapter is plugged in it's configured while still being powered
off (HCI_AUTO_OFF flag is set), thus Set SSP will only set dev_flags but won't
write changes to controller. As a result remote devices won't use Secure Simple
Pairing with our device due to SSP Host Support flag disabled in extended
features and may also reject SSP attempt from our side (with possible fallback
to legacy pairing).
This patch ensures HCI Write Simple Pairing Mode is sent when Set Powered is
called to power on controller and clear HCI_AUTO_OFF flag.
Signed-off-by: Andrzej Kaczmarek <andrzej.kaczmarek@tieto.com>
Cc: stable@vger.kernel.org
Acked-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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Its possible to use RAW sockets to get a crash in
tcp_set_keepalive() / sk_reset_timer()
Fix is to make sure socket is a SOCK_STREAM one.
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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icmp_filter() should not modify its input, or else its caller
would need to recompute ip_hdr() if skb->head is reallocated.
Use skb_header_pointer() instead of pskb_may_pull() and
change the prototype to make clear both sk and skb are const.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull two ceph fixes from Sage Weil:
"The first fixes a leak in the rbd setup error path, and the second
fixes a more serious problem with mismatched kmap/kunmap that surfaced
after the recent refactoring work."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
libceph: only kunmap kmapped pages
rbd: drop dev reference on error in rbd_open()
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In write_partial_msg_pages(), pages need to be kmapped in order to
perform a CRC-32c calculation on them. As an artifact of the way
this code used to be structured, the kunmap() call was separated
from the kmap() call and both were done conditionally. But the
conditions under which the kmap() and kunmap() calls were made
differed, so there was a chance a kunmap() call would be done on a
page that had not been mapped.
The symptom of this was tripping a BUG() in kunmap_high() when
pkmap_count[nr] became 0.
Reported-by: Bryan K. Wright <bryan@virginia.edu>
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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Change return value from -EACCES to -EPERM when the permission check fails.
Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In case of error, the function fib6_add_1() returns ERR_PTR()
or NULL pointer. The ERR_PTR() case check is missing in fib6_add().
dpatch engine is used to generated this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
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A change in a series of VLAN-related changes appears to have
inadvertently disabled the use of the scatter gather feature of
network cards for transmission of non-IP ethernet protocols like ATA
over Ethernet (AoE). Below is a reference to the commit that
introduces a "harmonize_features" function that turns off scatter
gather when the NIC does not support hardware checksumming for the
ethernet protocol of an sk buff.
commit f01a5236bd4b140198fbcc550f085e8361fd73fa
Author: Jesse Gross <jesse@nicira.com>
Date: Sun Jan 9 06:23:31 2011 +0000
net offloading: Generalize netif_get_vlan_features().
The can_checksum_protocol function is not equipped to consider a
protocol that does not require checksumming. Calling it for a
protocol that requires no checksum is inappropriate.
The patch below has harmonize_features call can_checksum_protocol when
the protocol needs a checksum, so that the network layer is not forced
to perform unnecessary skb linearization on the transmission of AoE
packets. Unnecessary linearization results in decreased performance
and increased memory pressure, as reported here:
http://www.spinics.net/lists/linux-mm/msg15184.html
The problem has probably not been widely experienced yet, because
only recently has the kernel.org-distributed aoe driver acquired the
ability to use payloads of over a page in size, with the patchset
recently included in the mm tree:
https://lkml.org/lkml/2012/8/28/140
The coraid.com-distributed aoe driver already could use payloads of
greater than a page in size, but its users generally do not use the
newest kernels.
Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The ESN replay window was already fully initialized in
xfrm_alloc_replay_state_esn(). No need to copy it again.
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The current code fails to ensure that the netlink message actually
contains as many bytes as the header indicates. If a user creates a new
state or updates an existing one but does not supply the bytes for the
whole ESN replay window, the kernel copies random heap bytes into the
replay bitmap, the ones happen to follow the XFRMA_REPLAY_ESN_VAL
netlink attribute. This leads to following issues:
1. The replay window has random bits set confusing the replay handling
code later on.
2. A malicious user could use this flaw to leak up to ~3.5kB of heap
memory when she has access to the XFRM netlink interface (requires
CAP_NET_ADMIN).
Known users of the ESN replay window are strongSwan and Steffen's
iproute2 patch (<http://patchwork.ozlabs.org/patch/85962/>). The latter
uses the interface with a bitmap supplied while the former does not.
strongSwan is therefore prone to run into issue 1.
To fix both issues without breaking existing userland allow using the
XFRMA_REPLAY_ESN_VAL netlink attribute with either an empty bitmap or a
fully specified one. For the former case we initialize the in-kernel
bitmap with zero, for the latter we copy the user supplied bitmap. For
state updates the full bitmap must be supplied.
To prevent overflows in the bitmap length calculation the maximum size
of bmp_len is limited to 128 by this patch -- resulting in a maximum
replay window of 4096 packets. This should be sufficient for all real
life scenarios (RFC 4303 recommends a default replay window size of 64).
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Martin Willi <martin@revosec.ch>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The memory used for the template copy is a local stack variable. As
struct xfrm_user_tmpl contains multiple holes added by the compiler for
alignment, not initializing the memory will lead to leaking stack bytes
to userland. Add an explicit memset(0) to avoid the info leak.
Initial version of the patch by Brad Spengler.
Cc: Brad Spengler <spender@grsecurity.net>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The memory reserved to dump the xfrm policy includes multiple padding
bytes added by the compiler for alignment (padding bytes in struct
xfrm_selector and struct xfrm_userpolicy_info). Add an explicit
memset(0) before filling the buffer to avoid the heap info leak.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The memory reserved to dump the xfrm state includes the padding bytes of
struct xfrm_usersa_info added by the compiler for alignment (7 for
amd64, 3 for i386). Add an explicit memset(0) before filling the buffer
to avoid the info leak.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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copy_to_user_auth() fails to initialize the remainder of alg_name and
therefore discloses up to 54 bytes of heap memory via netlink to
userland.
Use strncpy() instead of strcpy() to fill the trailing bytes of alg_name
with null bytes.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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rcv_wscale is a symetric parameter with snd_wscale.
Both this parameters are set on a connection handshake.
Without this value a remote window size can not be interpreted correctly,
because a value from a packet should be shifted on rcv_wscale.
And one more thing is that wscale_ok should be set too.
This patch doesn't break a backward compatibility.
If someone uses it in a old scheme, a rcv window
will be restored with the same bug (rcv_wscale = 0).
v2: Save backward compatibility on big-endian system. Before
the first two bytes were snd_wscale and the second two bytes were
rcv_wscale. Now snd_wscale is opt_val & 0xFFFF and rcv_wscale >> 16.
This approach is independent on byte ordering.
Cc: David S. Miller <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
CC: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It should be the skb which is not cloned
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If the old timestamps of a class, say cl, are stale when the class
becomes active, then QFQ may assign to cl a much higher start time
than the maximum value allowed. This may happen when QFQ assigns to
the start time of cl the finish time of a group whose classes are
characterized by a higher value of the ratio
max_class_pkt/weight_of_the_class with respect to that of
cl. Inserting a class with a too high start time into the bucket list
corrupts the data structure and may eventually lead to crashes.
This patch limits the maximum start time assigned to a class.
Signed-off-by: Paolo Valente <paolo.valente@unimore.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If recv() syscall is called for a TCP socket so that
- IOAT DMA is used
- MSG_WAITALL flag is used
- requested length is bigger than sk_rcvbuf
- enough data has already arrived to bring rcv_wnd to zero
then when tcp_recvmsg() gets to calling sk_wait_data(), receive
window can be still zero while sk_async_wait_queue exhausts
enough space to keep it zero. As this queue isn't cleaned until
the tcp_service_net_dma() call, sk_wait_data() cannot receive
any data and blocks forever.
If zero receive window and non-empty sk_async_wait_queue is
detected before calling sk_wait_data(), process the queue first.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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On some architectures test_bit() can return other values than 0 or 1:
With a generic x86 OpenWrt image in a kvm setup (batadv_)test_bit()
frequently returns -1 for me, leading to batadv_iv_ogm_update_seqnos()
wrongly signaling a protected seqno window.
This patch tries to fix this issue by making batadv_test_bit() return 0
or 1 only.
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Acked-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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if xfrm_policy_get_afinfo returns 0, it has already released the read
lock, xfrm_policy_put_afinfo should not be called again.
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Stephan Springl found that commit 1402d366019fed "tcp: introduce
tcp_try_coalesce" introduced a regression for rlogin
It turns out problem comes from TCP urgent data handling and
a change in behavior in input path.
rlogin sends two one-byte packets with URG ptr set, and when next data
frame is coalesced, we lack sk_data_ready() calls to wakeup consumer.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Stephan Springl <springl-k@lar.bfw.de>
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If orphan flags fails, we don't free the skb
on receive, which leaks the skb memory.
Return value was also wrong: netif_receive_skb
is supposed to return NET_RX_DROP, not ENOMEM.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When dump_one_policy() returns an error, e.g. because of a too small
buffer to dump the whole xfrm policy, xfrm_policy_netlink() returns
NULL instead of an error pointer. But its caller expects an error
pointer and therefore continues to operate on a NULL skbuff.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When dump_one_state() returns an error, e.g. because of a too small
buffer to dump the whole xfrm state, xfrm_state_netlink() returns NULL
instead of an error pointer. But its callers expect an error pointer
and therefore continue to operate on a NULL skbuff.
This could lead to a privilege escalation (execution of user code in
kernel context) if the attacker has CAP_NET_ADMIN and is able to map
address 0.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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IPv6 dst should take care of rt_genid too. When a xfrm policy is inserted or
deleted, all dst should be invalidated.
To force the validation, dst entries should be created with ->obsolete set to
DST_OBSOLETE_FORCE_CHK. This was already the case for all functions calling
ip6_dst_alloc(), except for ip6_rt_copy().
As a consequence, we can remove the specific code in inet6_connection_sock.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a policy is inserted or deleted, all dst should be recalculated.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This commit prepares the use of rt_genid by both IPv4 and IPv6.
Initialization is left in IPv4 part.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We dont use jhash anymore since route cache removal,
so we can get rid of get_random_bytes() calls for rt_genid
changes.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since route cache deletion (89aef8921bfbac22f), delay is no
more used. Remove it.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
1) Use after free and new device IDs in bluetooth from Andre Guedes,
Yevgeniy Melnichuk, Gustavo Padovan, and Henrik Rydberg.
2) Fix crashes with short packet lengths and VLAN in pktgen, from
Nishank Trivedi.
3) mISDN calls flush_work_sync() with locks held, fix from Karsten
Keil.
4) Packet scheduler gred parameters are reported to userspace
improperly scaled, and WRED idling is not performed correctly. All
from David Ward.
5) Fix TCP socket refcount problem in ipv6, from Julian Anastasov.
6) ibmveth device has RX queue alignment requirements which are not
being explicitly met resulting in sporadic failures, fix from
Santiago Leon.
7) Netfilter needs to take care when interpreting sockets attached to
socket buffers, they could be time-wait minisockets. Fix from Eric
Dumazet.
8) sock_edemux() has the same issue as netfilter did in #7 above, fix
from Eric Dumazet.
9) Avoid infinite loops in CBQ scheduler with some configurations, from
Eric Dumazet.
10) Deal with "Reflection scan: an Off-Path Attack on TCP", from Jozsef
Kadlecsik.
11) SCTP overcharges socket for TX packets, fix from Thomas Graf.
12) CODEL packet scheduler should not reset it's state every time it
builds a new flow, fix from Eric Dumazet.
13) Fix memory leak in nl80211, from Wei Yongjun.
14) NETROM doesn't check skb_copy_datagram_iovec() return values, from
Alan Cox.
15) l2tp ethernet was using sizeof(ETH_HLEN) instead of plain ETH_HLEN,
oops. From Eric Dumazet.
16) Fix selection of ath9k chips on which PA linearization and AM2PM
predistoration are used, from Felix Fietkau.
17) Flow steering settings in mlx4 driver need to be validated properly,
from Hadar Hen Zion.
18) bnx2x doesn't show the correct link duplex setting, from Yaniv
Rosner.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (75 commits)
pktgen: fix crash with vlan and packet size less than 46
bnx2x: Add missing afex code
bnx2x: fix registers dumped
bnx2x: correct advertisement of pause capabilities
bnx2x: display the correct duplex value
bnx2x: prevent timeouts when using PFC
bnx2x: fix stats copying logic
bnx2x: Avoid sending multiple statistics queries
net: qmi_wwan: call subdriver with control intf only
net_sched: gred: actually perform idling in WRED mode
net_sched: gred: fix qave reporting via netlink
net_sched: gred: eliminate redundant DP prio comparisons
net_sched: gred: correct comment about qavg calculation in RIO mode
mISDN: Fix wrong usage of flush_work_sync while holding locks
netfilter: log: Fix log-level processing
net-sched: sch_cbq: avoid infinite loop
net: qmi_wwan: fix Gobi device probing for un2430
net: fix net/core/sock.c build error
ixp4xx_hss: fix build failure due to missing linux/module.h inclusion
caif: move the dereference below the NULL test
...
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If vlan option is being specified in the pktgen and packet size
being requested is less than 46 bytes, despite being illogical
request, pktgen should not crash the kernel.
BUG: unable to handle kernel paging request at ffff88021fb82000
Process kpktgend_0 (pid: 1184, threadinfo ffff880215f1a000, task ffff880218544530)
Call Trace:
[<ffffffffa0637cd2>] ? pktgen_finalize_skb+0x222/0x300 [pktgen]
[<ffffffff814f0084>] ? build_skb+0x34/0x1c0
[<ffffffffa0639b11>] pktgen_thread_worker+0x5d1/0x1790 [pktgen]
[<ffffffffa03ffb10>] ? igb_xmit_frame_ring+0xa30/0xa30 [igb]
[<ffffffff8107ba20>] ? wake_up_bit+0x40/0x40
[<ffffffff8107ba20>] ? wake_up_bit+0x40/0x40
[<ffffffffa0639540>] ? spin+0x240/0x240 [pktgen]
[<ffffffff8107b4e3>] kthread+0x93/0xa0
[<ffffffff81615de4>] kernel_thread_helper+0x4/0x10
[<ffffffff8107b450>] ? flush_kthread_worker+0x80/0x80
[<ffffffff81615de0>] ? gs_change+0x13/0x13
The root cause of why pktgen is not able to handle this case is due
to comparison of signed (datalen) and unsigned data (sizeof), which
eventually passes a huge number to skb_put().
Signed-off-by: Nishank Trivedi <nistrive@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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gred_dequeue() and gred_drop() do not seem to get called when the
queue is empty, meaning that we never start idling while in WRED
mode. And since qidlestart is not stored by gred_store_wred_set(),
we would never stop idling while in WRED mode if we ever started.
This messes up the average queue size calculation that influences
packet marking/dropping behavior.
Now, we start WRED mode idling as we are removing the last packet
from the queue. Also we now actually stop WRED mode idling when we
are enqueuing a packet.
Cc: Bruce Osler <brosler@cisco.com>
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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q->vars.qavg is a Wlog scaled value, but q->backlog is not. In order
to pass q->vars.qavg as the backlog value, we need to un-scale it.
Additionally, the qave value returned via netlink should not be Wlog
scaled, so we need to un-scale the result of red_calc_qavg().
This caused artificially high values for "Average Queue" to be shown
by 'tc -s -d qdisc', but did not affect the actual operation of GRED.
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Each pair of DPs only needs to be compared once when searching for
a non-unique prio value.
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pablo Neira Ayuso say:
====================
The following patchset contains four updates for your net tree, they are:
* Fix crash on timewait sockets, since the TCP early demux was added,
in nfnetlink_log, from Eric Dumazet.
* Fix broken syslog log-level for xt_LOG and ebt_log since printk format was
converted from <.> to a 2 bytes pattern using ASCII SOH, from Joe Perches.
* Two security fixes for the TCP connection tracking targeting off-path attacks,
from Jozsef Kadlecsik. The problem was discovered by Jan Wrobel and it is
documented in: http://mixedbit.org/reflection_scan/reflection_scan.pdf.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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auto75914331@hushmail.com reports that iptables does not correctly
output the KERN_<level>.
$IPTABLES -A RULE_0_in -j LOG --log-level notice --log-prefix "DENY in: "
result with linux 3.6-rc5
Sep 12 06:37:29 xxxxx kernel: <5>DENY in: IN=eth0 OUT= MAC=.......
result with linux 3.5.3 and older:
Sep 9 10:43:01 xxxxx kernel: DENY in: IN=eth0 OUT= MAC......
commit 04d2c8c83d0
("printk: convert the format for KERN_<LEVEL> to a 2 byte pattern")
updated the syslog header style but did not update netfilter uses.
Do so.
Use KERN_SOH and string concatenation instead of "%c" KERN_SOH_ASCII
as suggested by Eric Dumazet.
Signed-off-by: Joe Perches <joe@perches.com>
cc: auto75914331@hushmail.com
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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