- 12 Aug, 2014 40 commits
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Steven Rostedt (Red Hat) authored
A race exists between module loading and enabling of function tracer. CPU 1 CPU 2 ----- ----- load_module() module->state = MODULE_STATE_COMING register_ftrace_function() mutex_lock(&ftrace_lock); ftrace_startup() update_ftrace_function(); ftrace_arch_code_modify_prepare() set_all_module_text_rw(); <enables-ftrace> ftrace_arch_code_modify_post_process() set_all_module_text_ro(); [ here all module text is set to RO, including the module that is loading!! ] blocking_notifier_call_chain(MODULE_STATE_COMING); ftrace_init_module() [ tries to modify code, but it's RO, and fails! ftrace_bug() is called] When this race happens, ftrace_bug() will produces a nasty warning and all of the function tracing features will be disabled until reboot. The simple solution is to treate module load the same way the core kernel is treated at boot. To hardcode the ftrace function modification of converting calls to mcount into nops. This is done in init/main.c there's no reason it could not be done in load_module(). This gives a better control of the changes and doesn't tie the state of the module to its notifiers as much. Ftrace is special, it needs to be treated as such. The reason this would work, is that the ftrace_module_init() would be called while the module is in MODULE_STATE_UNFORMED, which is ignored by the set_all_module_text_ro() call. Link: http://lkml.kernel.org/r/1395637826-3312-1-git-send-email-indou.takao@jp.fujitsu.comReported-by:
Takao Indoh <indou.takao@jp.fujitsu.com> Acked-by:
Rusty Russell <rusty@rustcorp.com.au> Cc: stable@vger.kernel.org # 2.6.38+ Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> (cherry picked from commit a949ae56) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Martin Schwidefsky authored
The A register needs to be initialized to zero in the prolog if the first instruction of the BPF program is BPF_S_LDX_B_MSH to prevent leaking the content of %r5 to user space. Cc: <stable@vger.kernel.org> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> (cherry picked from commit 6e0de817) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Thomas Hellstrom authored
We already check that the buffer object we're accessing is registered with the file. Now also make sure that we can't DMA across buffer object boundaries. v2: Code commenting update. Cc: stable@vger.kernel.org Signed-off-by:
Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by:
Jakob Bornecrantz <jakob@vmware.com> (cherry picked from commit cbd75e97) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Michael S. Tsirkin authored
skb_segment copies frags around, so we need to copy them carefully to avoid accessing user memory after reporting completion to userspace through a callback. skb_segment doesn't normally happen on datapath: TSO needs to be disabled - so disabling zero copy in this case does not look like a big deal. Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Acked-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 1fd819ec) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Julius Werner authored
We have observed a rare cycle state desync bug after Set TR Dequeue Pointer commands on Intel LynxPoint xHCs (resulting in an endpoint that doesn't fetch new TRBs and thus an unresponsive USB device). It always triggers when a previous Set TR Dequeue Pointer command has set the pointer to the final Link TRB of a segment, and then another URB gets enqueued and cancelled again before it can be completed. Further investigation showed that the xHC had returned the Link TRB in the TRB Pointer field of the Transfer Event (CC == Stopped -- Length Invalid), but when xhci_find_new_dequeue_state() later accesses the Endpoint Context's TR Dequeue Pointer field it is set to the first TRB of the next segment. The driver expects those two values to be the same in this situation, and uses the cycle state of the latter together with the address of the former. This should be fine according to the XHCI specification, since the endpoint ring should be stopped when returning the Transfer Event and thus should not advance over the Link TRB before it gets restarted. However, real-world XHCI implementations apparently don't really care that much about these details, so the driver should follow a more defensive approach to try to work around HC spec violations. This patch removes the stopped_trb variable that had been used to store the TRB Pointer from the last Transfer Event of a stopped TRB. Instead, xhci_find_new_dequeue_state() now relies only on the Endpoint Context, requiring a small amount of additional processing to find the virtual address corresponding to the TR Dequeue Pointer. Some other parts of the function were slightly rearranged to better fit into this model. This patch should be backported to kernels as old as 2.6.31 that contain the commit ae636747 "USB: xhci: URB cancellation support." Signed-off-by:
Julius Werner <jwerner@chromium.org> Cc: stable@vger.kernel.org Signed-off-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> (cherry picked from commit 1f81b6d2) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Hans de Goede authored
Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Sarah Sharp <sarah.a.sharp@linux.intel.com> (cherry picked from commit c4bedb77) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
Dan writes: "The Dell drivers use the same configuration for PIDs: 81A2: Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card 81A3: Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card 81A4: Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card 81A8: Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card 81A9: Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card These devices are all clearly Sierra devices, but are also definitely Gobi-based. The A8 might be the MC7700/7710 and A9 is likely a MC7750. >From DellGobi5kSetup.exe from the Dell drivers: usbif0: serial/firmware loader? usbif2: nmea usbif3: modem/ppp usbif8: net/QMI" Reported-by:
AceLan Kao <acelan.kao@canonical.com> Reported-by:
Dan Williams <dcbw@redhat.com> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 6f10c5d1) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
A number of older CMOTech modems are based on Qualcomm chips and exporting a QMI/wwan function. Reported-by:
Lars Melin <larsm17@gmail.com> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 41be7d90) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
Device interface layout: 0: ff/ff/ff - serial 1: ff/00/00 - serial AT+PPP 2: ff/ff/ff - QMI/wwan 3: 08/06/50 - storage Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 75573660) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
Device interface layout: 0: ff/ff/ff - serial 1: ff/ff/ff - serial AT+PPP 2: 08/06/50 - storage 3: ff/ff/ff - serial 4: ff/ff/ff - QMI/wwan Reported-by:
Julio Araujo <julio.araujo@wllctel.com.br> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit efc0b25c) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 9214224e) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 1c138607) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit b85f5dea) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Aleksander Morgado authored
When the PXS8 and PHS8 devices show up with PID 0x0053 they will expose both a QMI port and a WWAN interface. CC: Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com> CC: Christian Schmiedl <christian.schmiedl@gemalto.com> CC: Nicolaus Colberg <nicolaus.colberg@gemalto.com> CC: David McCullough <david.mccullough@accelecon.com> Signed-off-by:
Aleksander Morgado <aleksander@aleksander.es> Acked-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 9b2b6a2d) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Raymond Wanyoike authored
The driver description files give these descriptions to the vendor specific ports on this modem: VID_19D2&PID_1270&MI_00: "ZTE MF667 Diagnostics Port" VID_19D2&PID_1270&MI_01: "ZTE MF667 AT Port" VID_19D2&PID_1270&MI_02: "ZTE MF667 ATExt2 Port" VID_19D2&PID_1270&MI_03: "ZTE MF667 ATExt Port" VID_19D2&PID_1270&MI_04: "ZTE MF667 USB Modem" VID_19D2&PID_1270&MI_05: "ZTE MF667 Network Adapter" Signed-off-by:
Raymond Wanyoike <raymond.wanyoike@gmail.com> Acked-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 7653aabf) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Enrico Mioso authored
This is a QMI device, manufactured by TCT Mobile Phones. A companion patch blacklisting this device's QMI interface in the option.c driver has been sent. Signed-off-by:
Enrico Mioso <mrkiko.rs@gmail.com> Signed-off-by:
Antonella Pellizzari <anto.pellizzari83@gmail.com> Tested-by:
Dan Williams <dcbw@redhat.com> Acked-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit ce97fef4) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Aleksander Morgado authored
Cinterion PLXX LTE devices have a 0x0060 product ID, not 0x12d1. The blacklisting in the serial/option driver does actually use the correct PID, as per commit 8ff10bdb ('USB: Blacklisted Cinterion's PLxx WWAN Interface'). CC: Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com> CC: Christian Schmiedl <christian.schmiedl@gemalto.com> CC: Nicolaus Colberg <nicolaus.colberg@gemalto.com> Signed-off-by:
Aleksander Morgado <aleksander@lanedo.com> Acked-by:
Bjørn Mork <bjorn@mork.no> Acked-by:
Christian Schmiedl <christian.schmiedl@gemalto.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 2d77f343) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Fabio Porcedda authored
Newer firmware use a new pid and a different interface. Signed-off-by:
Fabio Porcedda <fabio.porcedda@gmail.com> Acked-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 905468fa) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Enrico Mioso authored
Another QMI-speaking device by ZTE, re-branded by ONDA! I'm connected ovr this device's QMI interface right now, so I can say I tested it! :) Note: a follow-up patch was posted to the linux-usb mailing list, to prevent the option driver from binding to the device's QMI interface, making it unusable. Signed-off-by:
Enrico Mioso <mrkiko.rs@gmail.com> Acked-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit d8eb8f99) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit d0b5e516) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
A standard Gobi 3000 reference design module. Reported-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit aa3aba1c) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
The MC8305 module got an additional entry added based solely on information from a Windows driver *.inf file. We now have the actual descriptor layout from one of these modules, and it consists of two alternate configurations where cfg #1 is a normal Gobi 2k layout and cfg #2 is MBIM only, using interface numbers 5 and 6 for MBIM control and data. The extra Windows driver entry for interface number 5 was most likely a bug. Deleting the bogus entry to avoid unnecessary qmi_wwan probe failures when using the MBIM configuration. Reported-by:
Lana Black <sickmind@lavabit.com> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 5a008ffa) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Eric Dumazet authored
Recycling skb always had been very tough... This time it appears GRO layer can accumulate skb->truesize adjustments made by drivers when they attach a fragment to skb. skb_gro_receive() can only subtract from skb->truesize the used part of a fragment. I spotted this problem seeing TcpExtPruneCalled and TcpExtTCPRcvCollapsed that were unexpected with a recent kernel, where TCP receive window should be sized properly to accept traffic coming from a driver not overshooting skb->truesize. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit e33d0ba8) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Li RongQing authored
the value of itag is a random value from stack, and may not be initiated by fib_validate_source, which called fib_combine_itag if CONFIG_IP_ROUTE_CLASSID is not set This will make the cached dst uncertainty Signed-off-by:
Li RongQing <roy.qing.li@gmail.com> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit fbdc0ad0) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Susant Sahani authored
The function ip6_tnl_validate assumes that the rtnl attribute IFLA_IPTUN_PROTO always be filled . If this attribute is not filled by the userspace application kernel get crashed with NULL pointer dereference. This patch fixes the potential kernel crash when IFLA_IPTUN_PROTO is missing . Signed-off-by:
Susant Sahani <susant@redhat.com> Acked-by:
Thomas Graf <tgraf@suug.ch> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit c8965932) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Peter Christensen authored
Clearing the IFF_ALLMULTI flag on a down interface could cause an allmulti overflow on the underlying interface. Attempting the set IFF_ALLMULTI on the underlying interface would cause an error and the log message: "allmulti touches root, set allmulti failed." Signed-off-by:
Peter Christensen <pch@ordbogen.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit bbeb0ead) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Bjørn Mork authored
This driver maps 802.1q VLANs to MBIM sessions. The mapping is based on a bogus assumption that all tagged frames will use the acceleration API because we enable NETIF_F_HW_VLAN_CTAG_TX. This fails for e.g. frames tagged in userspace using packet sockets. Such frames will erroneously be considered as untagged and silently dropped based on not being IP. Fix by falling back to looking into the ethernet header for a tag if no accelerated tag was found. Fixes: a82c7ce5 ("net: cdc_ncm: map MBIM IPS SessionID to VLAN ID") Cc: Greg Suarez <gsuarez@smithmicro.com> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 6b5eeb7f) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Sergey Popovich authored
Increment fib_info_cnt in fib_create_info() right after successfuly alllocating fib_info structure, overwise fib_metrics allocation failure leads to fib_info_cnt incorrectly decremented in free_fib_info(), called on error path from fib_create_info(). Signed-off-by:
Sergey Popovich <popovich_sergei@mail.ru> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit aeefa1ec) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Florian Westphal authored
If conntrack defragments incoming ipv6 frags it stores largest original frag size in ip6cb and sets ->local_df. We must thus first test the largest original frag size vs. mtu, and not vice versa. Without this patch PKTTOOBIG is still generated in ip6_fragment() later in the stack, but 1) IPSTATS_MIB_INTOOBIGERRORS won't increment 2) packet did (needlessly) traverse netfilter postrouting hook. Fixes: fe6cc55f ("net: ip, ipv6: handle gso skbs in forwarding path") Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 418a3156) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Florian Westphal authored
else we may fail to forward skb even if original fragments do fit outgoing link mtu: 1. remote sends 2k packets in two 1000 byte frags, DF set 2. we want to forward but only see '2k > mtu and DF set' 3. we then send icmp error saying that outgoing link is 1500 But original sender never sent a packet that would not fit the outgoing link. Setting local_df makes outgoing path test size vs. IPCB(skb)->frag_max_size, so we will still send the correct error in case the largest original size did not fit outgoing link mtu. Reported-by:
Maxime Bizon <mbizon@freebox.fr> Suggested-by:
Maxime Bizon <mbizon@freebox.fr> Fixes: 5f2d04f1 (ipv4: fix path MTU discovery with connection tracking) Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> (cherry picked from commit 895162b1) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Florian Westphal authored
local_df means 'ignore DF bit if set', so if its set we're allowed to perform ip fragmentation. This wasn't noticed earlier because the output path also drops such skbs (and emits needed icmp error) and because netfilter ip defrag did not set local_df until couple of days ago. Only difference is that DF-packets-larger-than MTU now discarded earlier (f.e. we avoid pointless netfilter postrouting trip). While at it, drop the repeated test ip_exceeds_mtu, checking it once is enough... Fixes: fe6cc55f ("net: ip, ipv6: handle gso skbs in forwarding path") Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit ca6c5d4a) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Liu Yu authored
commit b9f47a3a (tcp_cubic: limit delayed_ack ratio to prevent divide error) try to prevent divide error, but there is still a little chance that delayed_ack can reach zero. In case the param cnt get negative value, then ratio+cnt would overflow and may happen to be zero. As a result, min(ratio, ACK_RATIO_LIMIT) will calculate to be zero. In some old kernels, such as 2.6.32, there is a bug that would pass negative param, which then ultimately leads to this divide error. commit 5b35e1e6 (tcp: fix tcp_trim_head() to adjust segment count with skb MSS) fixed the negative param issue. However, it's safe that we fix the range of delayed_ack as well, to make sure we do not hit a divide by zero. CC: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
Liu Yu <allanyuliu@tencent.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Acked-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 0cda345d) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Vlad Yasevich authored
This reverts commit 12a2856b. The commit above doesn't appear to be necessary any more as the checksums appear to be correctly computed/validated. Additionally the above commit breaks kvm configurations where one VM is using a device that support checksum offload (virtio) and the other VM does not. In this case, packets leaving virtio device will have CHECKSUM_PARTIAL set. The packets is forwarded to a macvtap that has offload features turned off. Since we use CHECKSUM_UNNECESSARY, the host does does not update the checksum and thus a bad checksum is passed up to the guest. CC: Daniel Lezcano <daniel.lezcano@free.fr> CC: Patrick McHardy <kaber@trash.net> CC: Andrian Nord <nightnord@gmail.com> CC: Eric Dumazet <eric.dumazet@gmail.com> CC: Michael S. Tsirkin <mst@redhat.com> CC: Jason Wang <jasowang@redhat.com> Signed-off-by:
Vlad Yasevich <vyasevic@redhat.com> Acked-by:
Michael S. Tsirkin <mst@redhat.com> Acked-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit f114890c) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Xufeng Zhang authored
commit 813b3b5d (ipv4: Use caller's on-stack flowi as-is in output route lookups.) introduces another regression which is very similar to the problem of commit e6b45241 (ipv4: reset flowi parameters on route connect) wants to fix: Before we call ip_route_output_key() in sctp_v4_get_dst() to get a dst that matches a bind address as the source address, we have already called this function previously and the flowi parameters have been initialized including flowi4_oif, so when we call this function again, the process in __ip_route_output_key() will be different because of the setting of flowi4_oif, and we'll get a networking device which corresponds to the inputted flowi4_oif as the output device, this is wrong because we'll never hit this place if the previously returned source address of dst match one of the bound addresses. To reproduce this problem, a vlan setting is enough: # ifconfig eth0 up # route del default # vconfig add eth0 2 # vconfig add eth0 3 # ifconfig eth0.2 10.0.1.14 netmask 255.255.255.0 # route add default gw 10.0.1.254 dev eth0.2 # ifconfig eth0.3 10.0.0.14 netmask 255.255.255.0 # ip rule add from 10.0.0.14 table 4 # ip route add table 4 default via 10.0.0.254 src 10.0.0.14 dev eth0.3 # sctp_darn -H 10.0.0.14 -P 36422 -h 10.1.4.134 -p 36422 -s -I You'll detect that all the flow are routed to eth0.2(10.0.1.254). Signed-off-by:
Xufeng Zhang <xufeng.zhang@windriver.com> Signed-off-by:
Julian Anastasov <ja@ssi.bg> Acked-by:
Vlad Yasevich <vyasevich@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 85350871) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Toshiaki Makita authored
When bridge device is created with IFLA_ADDRESS, we are not calling br_stp_change_bridge_id(), which leads to incorrect local fdb management and bridge id calculation, and prevents us from receiving frames on the bridge device. Reported-by:
Tom Gundersen <teg@jklm.no> Signed-off-by:
Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 30313a3d) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Kumar Sundararajan authored
Commit 2bec5a36 (ipv6: fib: fix crash when changing large fib while dumping it) introduced ability to restart the dump at tree root, but failed to skip correctly a count of already dumped entries. Code didn't match Patrick intent. We must skip exactly the number of already dumped entries. Note that like other /proc/net files or netlink producers, we could still dump some duplicates entries. Reported-by:
Debabrata Banerjee <dbavatar@gmail.com> Reported-by:
Josh Hunt <johunt@akamai.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit fa809e2f) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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David Gibson authored
Since 115c9b81 (rtnetlink: Fix problem with buffer allocation), RTM_NEWLINK messages only contain the IFLA_VFINFO_LIST attribute if they were solicited by a GETLINK message containing an IFLA_EXT_MASK attribute with the RTEXT_FILTER_VF flag. That was done because some user programs broke when they received more data than expected - because IFLA_VFINFO_LIST contains information for each VF it can become large if there are many VFs. However, the IFLA_VF_PORTS attribute, supplied for devices which implement ndo_get_vf_port (currently the 'enic' driver only), has the same problem. It supplies per-VF information and can therefore become large, but it is not currently conditional on the IFLA_EXT_MASK value. Worse, it interacts badly with the existing EXT_MASK handling. When IFLA_EXT_MASK is not supplied, the buffer for netlink replies is fixed at NLMSG_GOODSIZE. If the information for IFLA_VF_PORTS exceeds this, then rtnl_fill_ifinfo() returns -EMSGSIZE on the first message in a packet. netlink_dump() will misinterpret this as having finished the listing and omit data for this interface and all subsequent ones. That can cause getifaddrs(3) to enter an infinite loop. This patch addresses the problem by only supplying IFLA_VF_PORTS when IFLA_EXT_MASK is supplied with the RTEXT_FILTER_VF flag set. Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Reviewed-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit c53864fd) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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David Gibson authored
Without IFLA_EXT_MASK specified, the information reported for a single interface in response to RTM_GETLINK is expected to fit within a netlink packet of NLMSG_GOODSIZE. If it doesn't, however, things will go badly wrong, When listing all interfaces, netlink_dump() will incorrectly treat -EMSGSIZE on the first message in a packet as the end of the listing and omit information for that interface and all subsequent ones. This can cause getifaddrs(3) to enter an infinite loop. This patch won't fix the problem, but it will WARN_ON() making it easier to track down what's going wrong. Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Reviewed-by:
Jiri Pirko <jpirko@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit 973462bb) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Vlad Yasevich authored
Currently, it is possible to create an SCTP socket, then switch auth_enable via sysctl setting to 1 and crash the system on connect: Oops[#1]: CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.1-mipsgit-20140415 #1 task: ffffffff8056ce80 ti: ffffffff8055c000 task.ti: ffffffff8055c000 [...] Call Trace: [<ffffffff8043c4e8>] sctp_auth_asoc_set_default_hmac+0x68/0x80 [<ffffffff8042b300>] sctp_process_init+0x5e0/0x8a4 [<ffffffff8042188c>] sctp_sf_do_5_1B_init+0x234/0x34c [<ffffffff804228c8>] sctp_do_sm+0xb4/0x1e8 [<ffffffff80425a08>] sctp_endpoint_bh_rcv+0x1c4/0x214 [<ffffffff8043af68>] sctp_rcv+0x588/0x630 [<ffffffff8043e8e8>] sctp6_rcv+0x10/0x24 [<ffffffff803acb50>] ip6_input+0x2c0/0x440 [<ffffffff8030fc00>] __netif_receive_skb_core+0x4a8/0x564 [<ffffffff80310650>] process_backlog+0xb4/0x18c [<ffffffff80313cbc>] net_rx_action+0x12c/0x210 [<ffffffff80034254>] __do_softirq+0x17c/0x2ac [<ffffffff800345e0>] irq_exit+0x54/0xb0 [<ffffffff800075a4>] ret_from_irq+0x0/0x4 [<ffffffff800090ec>] rm7k_wait_irqoff+0x24/0x48 [<ffffffff8005e388>] cpu_startup_entry+0xc0/0x148 [<ffffffff805a88b0>] start_kernel+0x37c/0x398 Code: dd0900b8 000330f8 0126302d <dcc60000> 50c0fff1 0047182a a48306a0 03e00008 00000000 ---[ end trace b530b0551467f2fd ]--- Kernel panic - not syncing: Fatal exception in interrupt What happens while auth_enable=0 in that case is, that ep->auth_hmacs is initialized to NULL in sctp_auth_init_hmacs() when endpoint is being created. After that point, if an admin switches over to auth_enable=1, the machine can crash due to NULL pointer dereference during reception of an INIT chunk. When we enter sctp_process_init() via sctp_sf_do_5_1B_init() in order to respond to an INIT chunk, the INIT verification succeeds and while we walk and process all INIT params via sctp_process_param() we find that net->sctp.auth_enable is set, therefore do not fall through, but invoke sctp_auth_asoc_set_default_hmac() instead, and thus, dereference what we have set to NULL during endpoint initialization phase. The fix is to make auth_enable immutable by caching its value during endpoint initialization, so that its original value is being carried along until destruction. The bug seems to originate from the very first days. Fix in joint work with Daniel Borkmann. Reported-by:
Joshua Kinard <kumba@gentoo.org> Signed-off-by:
Vlad Yasevich <vyasevic@redhat.com> Signed-off-by:
Daniel Borkmann <dborkman@redhat.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Tested-by:
Joshua Kinard <kumba@gentoo.org> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit b14878cc) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Ivan Vecera authored
The patch fixes a problem with dropped jumbo frames after usage of 'ethtool -G ... rx'. Scenario: 1. ip link set eth0 up 2. ethtool -G eth0 rx N # <- This zeroes rx-jumbo 3. ip link set mtu 9000 dev eth0 The ethtool command set rx_jumbo_pending to zero so any received jumbo packets are dropped and you need to use 'ethtool -G eth0 rx-jumbo N' to workaround the issue. The patch changes the logic so rx_jumbo_pending value is changed only if jumbo frames are enabled (MTU > 1500). Signed-off-by:
Ivan Vecera <ivecera@redhat.com> Acked-by:
Michael Chan <mchan@broadcom.com> Signed-off-by:
David S. Miller <davem@davemloft.net> (cherry picked from commit ba67b510) Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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