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2016-11-30esp4: Fix integrity verification when ESN are usedTobias Brunner1-1/+1
When handling inbound packets, the two halves of the sequence number stored on the skb are already in network order. Fixes: 7021b2e1cddd ("esp4: Switch to new AEAD interface") Signed-off-by: Tobias Brunner <tobias@strongswan.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2016-06-23esp: Fix ESN generation under UDP encapsulationHerbert Xu1-20/+32
Blair Steven noticed that ESN in conjunction with UDP encapsulation is broken because we set the temporary ESP header to the wrong spot. This patch fixes this by first of all using the right spot, i.e., 4 bytes off the real ESP header, and then saving this information so that after encryption we can restore it properly. Fixes: 7021b2e1cddd ("esp4: Switch to new AEAD interface") Reported-by: Blair Steven <Blair.Steven@alliedtelesis.co.nz> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-28esp4: Switch to new AEAD interfaceHerbert Xu1-78/+122
This patch makes use of the new AEAD interface which uses a single SG list instead of separate lists for the AD and plain text. The IV generation is also now carried out through normal AEAD methods. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-04-03ipv4: coding style: comparison for equality with NULLIan Morris1-1/+1
The ipv4 code uses a mixture of coding styles. In some instances check for NULL pointer is done as x == NULL and sometimes as !x. !x is preferred according to checkpatch and this patch makes the code consistent by adopting the latter form. No changes detected by objdiff. Signed-off-by: Ian Morris <ipm@chirality.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-06net: esp: Convert NETDEBUG to pr_infoJoe Perches1-5/+5
Commit 64ce207306de ("[NET]: Make NETDEBUG pure printk wrappers") originally had these NETDEBUG printks as always emitting. Commit a2a316fd068c ("[NET]: Replace CONFIG_NET_DEBUG with sysctl") added a net_msg_warn sysctl to these NETDEBUG uses. Convert these NETDEBUG uses to normal pr_info calls. This changes the output prefix from "ESP: " to include "IPSec: " for the ipv4 case and "IPv6: " for the ipv6 case. These output lines are now like the other messages in the files. Other miscellanea: Neaten the arithmetic spacing to be consistent with other arithmetic spacing in the files. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05esp4: remove assignment in if conditionFabian Frederick1-1/+3
Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-25esp4: Use the IPsec protocol multiplexer APISteffen Klassert1-9/+17
Switch esp4 to use the new IPsec protocol multiplexer. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2013-10-29net: esp{4,6}: get rid of struct esp_dataMathias Krause1-26/+14
struct esp_data consists of a single pointer, vanishing the need for it to be a structure. Fold the pointer into 'data' direcly, removing one level of pointer indirection. Signed-off-by: Mathias Krause <mathias.krause@secunet.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2013-10-29net: esp{4,6}: remove padlen from struct esp_dataMathias Krause1-8/+1
The padlen member of struct esp_data is always zero. Get rid of it. Signed-off-by: Mathias Krause <mathias.krause@secunet.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2013-08-05net: esp{4,6}: fix potential MTU calculation overflowsDaniel Borkmann1-1/+1
Commit 91657eafb ("xfrm: take net hdr len into account for esp payload size calculation") introduced a possible interger overflow in esp{4,6}_get_mtu() handlers in case of x->props.mode equals XFRM_MODE_TUNNEL. Thus, the following expression will overflow unsigned int net_adj; ... <case ipv{4,6} XFRM_MODE_TUNNEL> net_adj = 0; ... return ((mtu - x->props.header_len - crypto_aead_authsize(esp->aead) - net_adj) & ~(align - 1)) + (net_adj - 2); where (net_adj - 2) would be evaluated as <foo> + (0 - 2) in an unsigned context. Fix it by simply removing brackets as those operations here do not need to have special precedence. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Benjamin Poirier <bpoirier@suse.de> Cc: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Benjamin Poirier <bpoirier@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-03ipv4: properly refresh rtable entries on pmtu/redirect eventsTimo Teräs1-5/+2
This reverts commit 05ab86c5 (xfrm4: Invalidate all ipv4 routes on IPsec pmtu events). Flushing all cached entries is not needed. Instead, invalidate only the related next hop dsts to recheck for the added next hop exception where needed. This also fixes a subtle race due to bumping generation id's before updating the pmtu. Cc: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Timo Teräs <timo.teras@iki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-15esp4: fix error return code in esp_output()Wei Yongjun1-3/+3
Fix to return a negative error code from the error handling case instead of 0, as returned elsewhere in this function. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-21xfrm4: Invalidate all ipv4 routes on IPsec pmtu eventsSteffen Klassert1-2/+5
On IPsec pmtu events we can't access the transport headers of the original packet, so we can't find the socket that sent the packet. The only chance to notify the socket about the pmtu change is to force a relookup for all routes. This patch implenents this for the IPsec protocols. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2013-01-08ah4/esp4: set transport header correctly for IPsec tunnel mode.Li RongQing1-1/+4
IPsec tunnel does not set ECN field to CE in inner header when the ECN field in the outer header is CE, and the ECN field in the inner header is ECT(0) or ECT(1). The cause is ipip_hdr() does not return the correct address of inner header since skb->transport-header is not the inner header after esp_input_done2(), or ah_input(). Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2012-07-12ipv4: Add redirect support to all protocol icmp error handlers.David S. Miller1-5/+13
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-06-15ipv4: Handle PMTU in all ICMP error handlers.David S. Miller1-0/+1
With ip_rt_frag_needed() removed, we have to explicitly update PMTU information in every ICMP error handler. Create two helper functions to facilitate this. 1) ipv4_sk_update_pmtu() This updates the PMTU when we have a socket context to work with. 2) ipv4_update_pmtu() Raw version, used when no socket context is available. For this interface, we essentially just pass in explicit arguments for the flow identity information we would have extracted from the socket. And you'll notice that ipv4_sk_update_pmtu() is simply implemented in terms of ipv4_update_pmtu() Note that __ip_route_output_key() is used, rather than something like ip_route_output_flow() or ip_route_output_key(). This is because we absolutely do not want to end up with a route that does IPSEC encapsulation and the like. Instead, we only want the route that would get us to the node described by the outermost IP header. Reported-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-27xfrm: take net hdr len into account for esp payload size calculationBenjamin Poirier1-15/+9
Corrects the function that determines the esp payload size. The calculations done in esp{4,6}_get_mtu() lead to overlength frames in transport mode for certain mtu values and suboptimal frames for others. According to what is done, mainly in esp{,6}_output() and tcp_mtu_to_mss(), net_header_len must be taken into account before doing the alignment calculation. Signed-off-by: Benjamin Poirier <bpoirier@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-13net: ipv4: Standardize prefixes for message loggingJoe Perches1-0/+2
Add #define pr_fmt(fmt) as appropriate. Add "IPv4: ", "TCP: ", and "IPsec: " to appropriate files. Standardize on "UDPLite: " for appropriate uses. Some prefixes were previously "UDPLITE: " and "UDP-Lite: ". Add KBUILD_MODNAME ": " to icmp and gre. Remove embedded prefixes as appropriate. Add missing "\n" to pr_info in gre.c. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-12net: Convert printks to pr_<level>Joe Perches1-4/+4
Use a more current kernel messaging style. Convert a printk block to print_hex_dump. Coalesce formats, align arguments. Use %s, __func__ instead of embedding function names. Some messages that were prefixed with <foo>_close are now prefixed with <foo>_fini. Some ah4 and esp messages are now not prefixed with "ip ". The intent of this patch is to later add something like #define pr_fmt(fmt) "IPv4: " fmt. to standardize the output messages. Text size is trivially reduced. (x86-32 allyesconfig) $ size net/ipv4/built-in.o* text data bss dec hex filename 887888 31558 249696 1169142 11d6f6 net/ipv4/built-in.o.new 887934 31558 249800 1169292 11d78c net/ipv4/built-in.o.old Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-22inet: constify ip headers and in6_addrEric Dumazet1-3/+4
Add const qualifiers to structs iphdr, ipv6hdr and in6_addr pointers where possible, to make code intention more obvious. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-14esp4: Add support for IPsec extended sequence numbersSteffen Klassert1-18/+82
This patch adds IPsec extended sequence numbers support to esp4. We use the authencesn crypto algorithm to handle esp with separate encryption/authentication algorithms. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-14xfrm: Use separate low and high order bits of the sequence numbers in ↵Steffen Klassert1-2/+2
xfrm_skb_cb To support IPsec extended sequence numbers, we split the output sequence numbers of xfrm_skb_cb in low and high order 32 bits and we add the high order 32 bits to the input sequence numbers. All users are updated accordingly. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-11xfrm: Traffic Flow Confidentiality for IPv4 ESPMartin Willi1-8/+24
Add TFC padding to all packets smaller than the boundary configured on the xfrm state. If the boundary is larger than the PMTU, limit padding to the PMTU. Signed-off-by: Martin Willi <martin@strongswan.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-23xfrm: SA lookups signature with markJamal Hadi Salim1-1/+1
pass mark to all SA lookups to prepare them for when we add code to have them search. Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-26xfrm: Use the user specified truncation length in ESP and AHMartin Willi1-1/+1
Instead of using the hardcoded truncation for authentication algorithms, use the truncation length specified on xfrm_state. Signed-off-by: Martin Willi <martin@strongswan.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-15net: constify struct net_protocolAlexey Dobriyan1-1/+1
Remove long removed "inet_protocol_base" declaration. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-26netns xfrm: AH/ESP in netns!Alexey Dobriyan1-1/+3
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-26netns xfrm: state lookup in netnsAlexey Dobriyan1-1/+1
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-03net: clean up net/ipv4/ah4.c esp4.c fib_semantics.c inet_connection_sock.c ↵Jianjun Kong1-2/+2
inetpeer.c ip_output.c Signed-off-by: Jianjun Kong <jianjun@zeuux.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-06ipsec: Interfamily IPSec BEETJoakim Koskela1-1/+1
Here's a revised version, based on Herbert's comments, of a fix for the ipv6-inner, ipv4-outer interfamily ipsec beet mode. It fixes the network header adjustment in interfamily, and doesn't reserve space for the pseudo header anymore when we have ipv6 as the inner family. Signed-off-by: Joakim Koskela <jookos@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-28[ESP]: Ensure IV is in linear part of the skb to avoid BUG() due to OOB accessThomas Graf1-1/+1
ESP does not account for the IV size when calling pskb_may_pull() to ensure everything it accesses directly is within the linear part of a potential fragment. This results in a BUG() being triggered when the both the IPv4 and IPv6 ESP stack is fed with an skb where the first fragment ends between the end of the esp header and the end of the IV. This bug was found by Dirk Nehring <dnehring@gmx.net> . Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-18[IPV4]: esp_output() misannotationsAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-13[IPSEC]: Fix bogus usage of u64 on input sequence numberHerbert Xu1-2/+3
Al Viro spotted a bogus use of u64 on the input sequence number which is big-endian. This patch fixes it by giving the input sequence number its own member in the xfrm_skb_cb structure. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-01[XFRM]: constify 'struct xfrm_type'Eric Dumazet1-1/+1
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-01[IPSEC]: Add support for combined mode algorithmsHerbert Xu1-13/+58
This patch adds support for combined mode algorithms with GCM being the first algorithm supported. Combined mode algorithms can be added through the xfrm_user interface using the new algorithm payload type XFRMA_ALG_AEAD. Each algorithms is identified by its name and the ICV length. For the purposes of matching algorithms in xfrm_tmpl structures, combined mode algorithms occupy the same name space as encryption algorithms. This is in line with how they are negotiated using IKE. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-01[IPSEC]: Use crypto_aead and authenc in ESPHerbert Xu1-195/+302
This patch converts ESP to use the crypto_aead interface and in particular the authenc algorithm. This lays the foundations for future support of combined mode algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPSEC]: Move all calls to xfrm_audit_state_icvfail to xfrm_inputHerbert Xu1-1/+0
Let's nip the code duplication in the bud :) Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[XFRM]: RFC4303 compliant auditingPaul Moore1-0/+1
This patch adds a number of new IPsec audit events to meet the auditing requirements of RFC4303. This includes audit hooks for the following events: * Could not find a valid SA [sections 2.1, 3.4.2] . xfrm_audit_state_notfound() . xfrm_audit_state_notfound_simple() * Sequence number overflow [section 3.3.3] . xfrm_audit_state_replay_overflow() * Replayed packet [section 3.4.3] . xfrm_audit_state_replay() * Integrity check failure [sections 3.4.4.1, 3.4.4.2] . xfrm_audit_state_icvfail() While RFC4304 deals only with ESP most of the changes in this patch apply to IPsec in general, i.e. both AH and ESP. The one case, integrity check failure, where ESP specific code had to be modified the same was done to the AH code for the sake of consistency. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPSEC]: Move state lock into x->type->inputHerbert Xu1-9/+15
This patch releases the lock on the state before calling x->type->input. It also adds the lock to the spots where they're currently needed. Most of those places (all except mip6) are expected to disappear with async crypto. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPSEC]: Move integrity stat collection into xfrm_inputHerbert Xu1-5/+8
Similar to the moving out of the replay processing on the output, this patch moves the integrity stat collectin from x->type->input into xfrm_input. This would eventually allow transforms such as AH/ESP to be lockless. The error value EBADMSG (currently unused in the crypto layer) is used to indicate a failed integrity check. In future this error can be directly returned by the crypto layer once we switch to aead algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-11[IPv4] ESP: Discard dummy packets introduced in rfc4303Thomas Graf1-0/+5
RFC4303 introduces dummy packets with a nexthdr value of 59 to implement traffic confidentiality. Such packets need to be dropped silently and the payload may not be attempted to be parsed as it consists of random chunk. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-31[NET]: Fix incorrect sg_mark_end() calls.David S. Miller1-5/+7
This fixes scatterlist corruptions added by commit 68e3f5dd4db62619fdbe520d36c9ebf62e672256 [CRYPTO] users: Fix up scatterlist conversion errors The issue is that the code calls sg_mark_end() which clobbers the sg_page() pointer of the final scatterlist entry. The first part fo the fix makes skb_to_sgvec() do __sg_mark_end(). After considering all skb_to_sgvec() call sites the most correct solution is to call __sg_mark_end() in skb_to_sgvec() since that is what all of the callers would end up doing anyways. I suspect this might have fixed some problems in virtio_net which is the sole non-crypto user of skb_to_sgvec(). Other similar sg_mark_end() cases were converted over to __sg_mark_end() as well. Arguably sg_mark_end() is a poorly named function because it doesn't just "mark", it clears out the page pointer as a side effect, which is what led to these bugs in the first place. The one remaining plain sg_mark_end() call is in scsi_alloc_sgtable() and arguably it could be converted to __sg_mark_end() if only so that we can delete this confusing interface from linux/scatterlist.h Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-27[CRYPTO] users: Fix up scatterlist conversion errorsHerbert Xu1-2/+5
This patch fixes the errors made in the users of the crypto layer during the sg_init_table conversion. It also adds a few conversions that were missing altogether. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-27[INET] ESP: Must #include <linux/scatterlist.h>Adrian Bunk1-1/+1
This patch fixes the following compile errors in some configurations: <-- snip --> ... CC net/ipv4/esp4.o /home/bunk/linux/kernel-2.6/git/linux-2.6/net/ipv4/esp4.c: In function 'esp_output': /home/bunk/linux/kernel-2.6/git/linux-2.6/net/ipv4/esp4.c:113: error: implicit declaration of function 'sg_init_table' make[3]: *** [net/ipv4/esp4.o] Error 1 ... /home/bunk/linux/kernel-2.6/git/linux-2.6/net/ipv6/esp6.c: In function 'esp6_output': /home/bunk/linux/kernel-2.6/git/linux-2.6/net/ipv6/esp6.c:112: error: implicit declaration of function 'sg_init_table' make[3]: *** [net/ipv6/esp6.o] Error 1 <-- snip --> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-26[IPSEC]: Add missing sg_init_table() calls to ESP.David S. Miller1-0/+2
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-11[IPSEC]: Move IP protocol setting from transforms into xfrm4_input.cHerbert Xu1-2/+1
This patch makes the IPv4 x->type->input functions return the next protocol instead of setting it directly. This is identical to how we do things in IPv6 and will help us merge common code on the input path. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-11[IPSEC]: Move IP length/checksum setting out of transformsHerbert Xu1-6/+1
This patch moves the setting of the IP length and checksum fields out of the transforms and into the xfrmX_output functions. This would help future efforts in merging the transforms themselves. It also adds an optimisation to ipcomp due to the fact that the transport offset is guaranteed to be zero. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-11[IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdrHerbert Xu1-5/+5
This patch removes the duplicate ipv6_{auth,esp,comp}_hdr structures since they're identical to the IPv4 versions. Duplicating them would only create problems for ourselves later when we need to add things like extended sequence numbers. I've also added transport header type conversion headers for these types which are now used by the transforms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-11[IPSEC]: Use IPv6 calling convention as the convention for x->mode->outputHerbert Xu1-6/+5
The IPv6 calling convention for x->mode->output is more general and could help an eventual protocol-generic x->type->output implementation. This patch adopts it for IPv4 as well and modifies the IPv4 type output functions accordingly. It also rewrites the IPv6 mac/transport header calculation to be based off the network header where practical. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-11[IPSEC]: Set skb->data to payload in x->mode->outputHerbert Xu1-4/+2
This patch changes the calling convention so that on entry from x->mode->output and before entry into x->type->output skb->data will point to the payload instead of the IP header. This is essentially a redistribution of skb_push/skb_pull calls with the aim of minimising them on the common path of tunnel + ESP. It'll also let us use the same calling convention between IPv4 and IPv6 with the next patch. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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