- Aug 29, 2017
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David S. Miller authored
Pieter Jansen van Vuuren says: ==================== nfp: fix layer calculation and flow dissector use Previously when calculating the supported key layers MPLS, IPv4/6 TTL and TOS were not considered. Formerly flow dissectors were referenced without first checking that they are in use and correctly populated by TC. Additionally this patch set fixes the incorrect use of mask field for vlan matching. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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Pieter Jansen van Vuuren authored
Previously the vlan tci field was incorrectly exact matched. This patch fixes this by using the flow dissector to populate the vlan tci field. Fixes: 5571e8c9 ("nfp: extend flower matching capabilities") Signed-off-by:
Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com> Reviewed-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by:
Simon Horman <simon.horman@netronome.com> Signed-off-by:
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Pieter Jansen van Vuuren authored
Previously when calculating the supported key layers MPLS, IPv4/6 TTL and TOS were not considered. This patch checks that the TTL and TOS fields are masked out before offloading. Additionally this patch checks that MPLS packets are correctly handled, by not offloading them. Fixes: af9d842c ("nfp: extend flower add flow offload") Signed-off-by:
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Pieter Jansen van Vuuren authored
Previously flow dissectors were referenced without first checking that they are in use and correctly populated by TC. This patch fixes this by checking each flow dissector key before referencing them. Fixes: 5571e8c9 ("nfp: extend flower matching capabilities") Signed-off-by:
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David S. Miller authored
Guillaume Nault says: ==================== l2tp: fix some l2tp_tunnel_find() issues in l2tp_netlink Since l2tp_tunnel_find() doesn't take a reference on the tunnel it returns, its users are almost guaranteed to be racy. This series defines l2tp_tunnel_get() which can be used as a safe replacement, and converts some of l2tp_tunnel_find() users in the l2tp_netlink module. Other users often combine this issue with other more or less subtle races. They will be fixed incrementally in followup series. ==================== Signed-off-by: -
Guillaume Nault authored
Use l2tp_tunnel_get() to retrieve tunnel, so that it can't go away on us. Otherwise l2tp_tunnel_destruct() might release the last reference count concurrently, thus freeing the tunnel while we're using it. Fixes: 309795f4 ("l2tp: Add netlink control API for L2TP") Signed-off-by:
Guillaume Nault <g.nault@alphalink.fr> Signed-off-by:
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Guillaume Nault authored
Use l2tp_tunnel_get() instead of l2tp_tunnel_find() so that we get a reference on the tunnel, preventing l2tp_tunnel_destruct() from freeing it from under us. Also move l2tp_tunnel_get() below nlmsg_new() so that we only take the reference when needed. Fixes: 309795f4 ("l2tp: Add netlink control API for L2TP") Signed-off-by:
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Guillaume Nault authored
We need to make sure the tunnel is not going to be destroyed by l2tp_tunnel_destruct() concurrently. Fixes: 309795f4 ("l2tp: Add netlink control API for L2TP") Signed-off-by:
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Guillaume Nault authored
l2tp_nl_cmd_tunnel_delete() needs to take a reference on the tunnel, to prevent it from being concurrently freed by l2tp_tunnel_destruct(). Fixes: 309795f4 ("l2tp: Add netlink control API for L2TP") Signed-off-by:
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Guillaume Nault authored
l2tp_tunnel_find() doesn't take a reference on the returned tunnel. Therefore, it's unsafe to use it because the returned tunnel can go away on us anytime. Fix this by defining l2tp_tunnel_get(), which works like l2tp_tunnel_find(), but takes a reference on the returned tunnel. Caller then has to drop this reference using l2tp_tunnel_dec_refcount(). As l2tp_tunnel_dec_refcount() needs to be moved to l2tp_core.h, let's simplify the patch and not move the L2TP_REFCNT_DEBUG part. This code has been broken (not even compiling) in May 2012 by commit a4ca44fa ("net: l2tp: Standardize logging styles") and fixed more than two years later by commit 29abe2fd ("l2tp: fix missing line continuation"). So it doesn't appear to be used by anyone. Same thing for l2tp_tunnel_free(); instead of moving it to l2tp_core.h, let's just simplify things and call kfree_rcu() directly in l2tp_tunnel_dec_refcount(). Extra assertions and debugging code provided by l2tp_tunnel_free() didn't help catching any of the reference counting and socket handling issues found while working on this series. Fixes: 309795f4 ("l2tp: Add netlink control API for L2TP") Signed-off-by:
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Guillaume Nault authored
Sessions must be fully initialised before calling l2tp_session_add_to_tunnel(). Otherwise, there's a short time frame where partially initialised sessions can be accessed by external users. Fixes: dbdbc73b ("l2tp: fix duplicate session creation") Signed-off-by:
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Antoine Tenart authored
The mac address is only retrieved from h/w when using PPv2.1. Otherwise the variable holding it is still checked and used if it contains a valid value. As the variable isn't initialized to an invalid mac address value, we end up with random mac addresses which can be the same for all the ports handled by this PPv2 driver. Fixes this by initializing the h/w mac address variable to {0}, which is an invalid mac address value. This way the random assignation fallback is called and all ports end up with their own addresses. Signed-off-by:Antoine Tenart <antoine.tenart@free-electrons.com> Fixes: 26975821 ("net: mvpp2: handle misc PPv2.1/PPv2.2 differences") Signed-off-by:
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Aleksander Morgado authored
The u-blox TOBY-L4 is a LTE Advanced (Cat 6) module with HSPA+ and 2G fallback. Unlike the TOBY-L2, this module has one single USB layout and exposes several TTYs for control and a NCM interface for data. Connecting this module may be done just by activating the desired PDP context with 'AT+CGACT=1,<cid>' and then running DHCP on the NCM interface. Signed-off-by:
Aleksander Morgado <aleksander@aleksander.es> Signed-off-by:
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Jesper Dangaard Brouer authored
Noticed that busy_poll_stop() also invoke the drivers napi->poll() function pointer, but didn't have an associated call to trace_napi_poll() like all other call sites. Signed-off-by:
Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by:
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- Aug 26, 2017
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David S. Miller authored
Merge tag 'wireless-drivers-for-davem-2017-08-25' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers Kalle Valo says: ==================== wireless-drivers fixes for 4.13 Only one iwlwifi patch this time. iwlwifi * fix multiple times reported lockdep warning found by new locking annotation introduced in v4.13-rc1 ==================== Signed-off-by:
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Paolo Abeni authored
Currently, in the udp6 code, the dst cookie is not initialized/updated concurrently with the RX dst used by early demux. As a result, the dst_check() in the early_demux path always fails, the rx dst cache is always invalidated, and we can't really leverage significant gain from the demux lookup. Fix it adding udp6 specific variant of sk_rx_dst_set() and use it to set the dst cookie when the dst entry is really changed. The issue is there since the introduction of early demux for ipv6. Fixes: 5425077d ("net: ipv6: Add early demux handler for UDP unicast") Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Signed-off-by:
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Christophe Jaillet authored
Check memory allocation failure and return -ENOMEM in such a case, as already done few lines below for another memory allocation. Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by:
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David S. Miller authored
Florian Fainelli says: ==================== r8169: Be drop monitor friendly First patch may be questionable but no other driver appears to be doing that and while it is defendable to account for left packets as dropped during TX clean, this appears misleading. I picked Stanislaw changes which brings us back to 2010, but this was present from pre-git days as well. Second patch fixes the two missing calls to dev_consume_skb_any(). ==================== Signed-off-by: -
Florian Fainelli authored
rtl_tx() is the TX reclamation process whereas rtl8169_tx_clear_range() does the TX ring cleaning during shutdown, both of these functions should call dev_consume_skb_any() to be drop monitor friendly. Fixes: cac4b22f ("r8169: do not account fragments as packets") Fixes: eb781397 ("r8169: Do not use dev_kfree_skb in xmit path") Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Florian Fainelli authored
rtl8169_tx_clear_range() is responsible for cleaning up the TX ring during interface shutdown, incrementing tx_dropped for every SKB that we left at the time in the ring is misleading. Fixes: cac4b22f ("r8169: do not account fragments as packets") Signed-off-by:
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Sabrina Dubroca authored
There are a few bugs around refcnt handling in the new BPF congestion control setsockopt: - The new ca is assigned to icsk->icsk_ca_ops even in the case where we cannot get a reference on it. This would lead to a use after free, since that ca is going away soon. - Changing the congestion control case doesn't release the refcnt on the previous ca. - In the reinit case, we first leak a reference on the old ca, then we call tcp_reinit_congestion_control on the ca that we have just assigned, leading to deinitializing the wrong ca (->release of the new ca on the old ca's data) and releasing the refcount on the ca that we actually want to use. This is visible by building (for example) BIC as a module and setting net.ipv4.tcp_congestion_control=bic, and using tcp_cong_kern.c from samples/bpf. This patch fixes the refcount issues, and moves reinit back into tcp core to avoid passing a ca pointer back to BPF. Fixes: 91b5b21c ("bpf: Add support for changing congestion control") Signed-off-by:
Sabrina Dubroca <sd@queasysnail.net> Acked-by:
Lawrence Brakmo <brakmo@fb.com> Signed-off-by:
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Steffen Klassert authored
rt_cookie might be used uninitialized, fix this by initializing it. Fixes: c5cff856 ("ipv6: add rcu grace period before freeing fib6_node") Signed-off-by:
Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by:
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- Aug 25, 2017
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stephen hemminger authored
There is a deadlock possible when canceling the link status delayed work queue. The removal process is run with RTNL held, and the link status callback is acquring RTNL. Resolve the issue by using trylock and rescheduling. If cancel is in process, that block it from happening. Fixes: 122a5f64 ("staging: hv: use delayed_work for netvsc_send_garp()") Signed-off-by:
Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by:
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David S. Miller authored
Parthasarathy Bhuvaragan says: ==================== tipc: buffer reassignment fixes This series contains fixes for buffer reassignments and a context imbalance. ==================== Signed-off-by: -
Parthasarathy Bhuvaragan authored
If we fail to find a valid bearer in tipc_node_get_linkname(), node_read_unlock() is called without holding the node read lock. This commit fixes this error. Signed-off-by:
Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Signed-off-by:
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Parthasarathy Bhuvaragan authored
In tipc_msg_reverse(), we assign skb attributes to local pointers in stack at startup. This is followed by skb_linearize() and for cloned buffers we perform skb relocation using pskb_expand_head(). Both these methods may update the skb attributes and thus making the pointers incorrect. In this commit, we fix this error by ensuring that the pointers are re-assigned after any of these skb operations. Fixes: 29042e19 ("tipc: let function tipc_msg_reverse() expand header when needed") Signed-off-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
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Parthasarathy Bhuvaragan authored
In tipc_rcv(), we linearize only the header and usually the packets are consumed as the nodes permit direct reception. However, if the skb contains tunnelled message due to fail over or synchronization we parse it in tipc_node_check_state() without performing linearization. This will cause link disturbances if the skb was non linear. In this commit, we perform linearization for the above messages. Signed-off-by:
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Eric Dumazet authored
syzkaller reported a refcount_t warning [1] Issue here is that noop_qdisc refcnt was never really considered as a true refcount, since qdisc_destroy() found TCQ_F_BUILTIN set : if (qdisc->flags & TCQ_F_BUILTIN || !refcount_dec_and_test(&qdisc->refcnt))) return; Meaning that all atomic_inc() we did on noop_qdisc.refcnt were not really needed, but harmless until refcount_t came. To fix this problem, we simply need to not increment noop_qdisc.refcnt, since we never decrement it. [1] refcount_t: increment on 0; use-after-free. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 21754 at lib/refcount.c:152 refcount_inc+0x47/0x50 lib/refcount.c:152 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 21754 Comm: syz-executor7 Not tainted 4.13.0-rc6+ #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 panic+0x1e4/0x417 kernel/panic.c:180 __warn+0x1c4/0x1d9 kernel/panic.c:541 report_bug+0x211/0x2d0 lib/bug.c:183 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190 do_trap_no_signal arch/x86/kernel/traps.c:224 [inline] do_trap+0x260/0x390 arch/x86/kernel/traps.c:273 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323 invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:846 RIP: 0010:refcount_inc+0x47/0x50 lib/refcount.c:152 RSP: 0018:ffff8801c43477a0 EFLAGS: 00010282 RAX: 000000000000002b RBX: ffffffff86093c14 RCX: 0000000000000000 RDX: 000000000000002b RSI: ffffffff8159314e RDI: ffffed0038868ee8 RBP: ffff8801c43477a8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff86093ac0 R13: 0000000000000001 R14: ffff8801d0f3bac0 R15: dffffc0000000000 attach_default_qdiscs net/sched/sch_generic.c:792 [inline] dev_activate+0x7d3/0xaa0 net/sched/sch_generic.c:833 __dev_open+0x227/0x330 net/core/dev.c:1380 __dev_change_flags+0x695/0x990 net/core/dev.c:6726 dev_change_flags+0x88/0x140 net/core/dev.c:6792 dev_ifsioc+0x5a6/0x930 net/core/dev_ioctl.c:256 dev_ioctl+0x2bc/0xf90 net/core/dev_ioctl.c:554 sock_do_ioctl+0x94/0xb0 net/socket.c:968 sock_ioctl+0x2c2/0x440 net/socket.c:1058 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 Fixes: 7b936405 ("net, sched: convert Qdisc.refcnt from atomic_t to refcount_t") Signed-off-by:Eric Dumazet <edumazet@google.com> Reported-by:
Dmitry Vyukov <dvyukov@google.com> Cc: Reshetova, Elena <elena.reshetova@intel.com> Signed-off-by:
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Florian Fainelli authored
In case bcm_sysport_init_tx_ring() is not able to allocate ring->cbs, we would return with an error, and call bcm_sysport_fini_tx_ring() and it would see that ring->cbs is NULL and do nothing. This would leak the coherent DMA descriptor area, so we need to free it on error before returning. Reported-by:
Eric Dumazet <edumazet@gmail.com> Fixes: 80105bef ("net: systemport: add Broadcom SYSTEMPORT Ethernet MAC driver") Signed-off-by:
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Florian Fainelli authored
There are 3 spots where we call dev_kfree_skb() but we are actually just doing a normal SKB consumption: __bcmgenet_tx_reclaim() for normal TX reclamation, bcmgenet_alloc_rx_buffers() during the initial RX ring setup and bcmgenet_free_rx_buffers() during RX ring cleanup. Fixes: d6707bec ("net: bcmgenet: rewrite bcmgenet_rx_refill()") Fixes: f48bed16 ("net: bcmgenet: Free skb after last Tx frag") Signed-off-by:
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Yuchung Cheng authored
This patch fixes a bug causing any sock operations to always return EINVAL. Fixes: a5192c52 ("bpf: fix to bpf_setsockops"). Reported-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Craig Gallek <kraig@google.com> Acked-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
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Florian Fainelli authored
Utilize dev_consume_skb_any(cb->skb) in bcm_sysport_free_cb() which is used when a TX packet is completed, as well as when the RX ring is cleaned on shutdown. None of these two cases are packet drops, so be drop monitor friendly. Suggested-by:
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Bob Peterson authored
In 9dbbfb0a function tipc_sk_reinit had additional logic added to loop in the event that function rhashtable_walk_next() returned -EAGAIN. No worries. However, if rhashtable_walk_start returns -EAGAIN, it does "continue", and therefore skips the call to rhashtable_walk_stop(). That has the effect of calling rcu_read_lock() without its paired call to rcu_read_unlock(). Since rcu_read_lock() may be nested, the problem may not be apparent for a while, especially since resize events may be rare. But the comments to rhashtable_walk_start() state: * ...Note that we take the RCU lock in all * cases including when we return an error. So you must always call * rhashtable_walk_stop to clean up. This patch replaces the continue with a goto and label to ensure a matching call to rhashtable_walk_stop(). Signed-off-by:
Bob Peterson <rpeterso@redhat.com> Acked-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Arnd Bergmann authored
gcc-8.0.0 (snapshot) points out that we copy a variable-length string into a fixed length field using memcpy() with the destination length, and that ends up copying whatever follows the string: inlined from 'ql_core_dump' at drivers/net/ethernet/qlogic/qlge/qlge_dbg.c:1106:2: drivers/net/ethernet/qlogic/qlge/qlge_dbg.c:708:2: error: 'memcpy' reading 15 bytes from a region of size 14 [-Werror=stringop-overflow=] memcpy(seg_hdr->description, desc, (sizeof(seg_hdr->description)) - 1); Changing it to use strncpy() will instead zero-pad the destination, which seems to be the right thing to do here. The bug is probably harmless, but it seems like a good idea to address it in stable kernels as well, if only for the purpose of building with gcc-8 without warnings. Fixes: a61f8026 ("qlge: Add ethtool register dump function.") Signed-off-by:Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Eric Dumazet authored
This change is needed to not fool drop monitor. (perf record ... -e skb:kfree_skb ) Packets were properly sent and are consumed after TX completion. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfDavid S. Miller authored
Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains Netfilter fixes for your net tree, they are: 1) Fix use after free of struct proc_dir_entry in ipt_CLUSTERIP, patch from Sabrina Dubroca. 2) Fix spurious EINVAL errors from iptables over nft compatibility layer. 3) Reload pointer to ip header only if there is non-terminal verdict, ie. XT_CONTINUE, otherwise invalid memory access may happen, patch from Taehee Yoo. 4) Fix interaction between SYNPROXY and NAT, SYNPROXY adds sequence adjustment already, however from nf_nat_setup() assumes there's not. Patch from Xin Long. 5) Fix burst arithmetics in nft_limit as Joe Stringer mentioned during NFWS in Faro. Patch from Andy Zhou. ==================== Signed-off-by:
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- Aug 24, 2017
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andy zhou authored
Current implementation treats the burst configuration the same as rate configuration. This can cause the per packet cost to be lower than configured. In effect, this bug causes the token bucket to be refilled at a higher rate than what user has specified. This patch changes the implementation so that the token bucket size is controlled by "rate + burst", while maintain the token bucket refill rate the same as user specified. Fixes: 96518518 ("netfilter: add nftables") Signed-off-by:
Andy Zhou <azhou@ovn.org> Acked-by:
Joe Stringer <joe@ovn.org> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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Xin Long authored
Commit 4440a2ab ("netfilter: synproxy: Check oom when adding synproxy and seqadj ct extensions") wanted to drop the packet when it fails to add seqadj ext due to no memory by checking if nfct_seqadj_ext_add returns NULL. But that nfct_seqadj_ext_add returns NULL can also happen when seqadj ext already exists in a nf_conn. It will cause that userspace protocol doesn't work when both dnat and snat are configured. Li Shuang found this issue in the case: Topo: ftp client router ftp server 10.167.131.2 <-> 10.167.131.254 10.167.141.254 <-> 10.167.141.1 Rules: # iptables -t nat -A PREROUTING -i eth1 -p tcp -m tcp --dport 21 -j \ DNAT --to-destination 10.167.141.1 # iptables -t nat -A POSTROUTING -o eth2 -p tcp -m tcp --dport 21 -j \ SNAT --to-source 10.167.141.254 In router, when both dnat and snat are added, nf_nat_setup_info will be called twice. The packet can be dropped at the 2nd time for DNAT due to seqadj ext is already added at the 1st time for SNAT. This patch is to fix it by checking for seqadj ext existence before adding it, so that the packet will not be dropped if seqadj ext already exists. Note that as Florian mentioned, as a long term, we should review ext_add() behaviour, it's better to return a pointer to the existing ext instead. Fixes: 4440a2ab ("netfilter: synproxy: Check oom when adding synproxy and seqadj ct extensions") Reported-by:
Li Shuang <shuali@redhat.com> Acked-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Xin Long <lucien.xin@gmail.com> Signed-off-by:
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Luca Coelho authored
Work queues cannot be allocated when a mutex is held because the mutex may be in use and that would make it sleep. Doing so generates the following splat with 4.13+: [ 19.513298] ====================================================== [ 19.513429] WARNING: possible circular locking dependency detected [ 19.513557] 4.13.0-rc5+ #6 Not tainted [ 19.513638] ------------------------------------------------------ [ 19.513767] cpuhp/0/12 is trying to acquire lock: [ 19.513867] (&tz->lock){+.+.+.}, at: [<ffffffff924afebb>] thermal_zone_get_temp+0x5b/0xb0 [ 19.514047] [ 19.514047] but task is already holding lock: [ 19.514166] (cpuhp_state){+.+.+.}, at: [<ffffffff91cc4baa>] cpuhp_thread_fun+0x3a/0x210 [ 19.514338] [ 19.514338] which lock already depends on the new lock. This lock dependency already existed with previous kernel versions, but it was not detected until commit 49dfe2a6 ("cpuhotplug: Link lock stacks for hotplug callbacks") was introduced. Reported-by:David Weinehall <david.weinehall@intel.com> Reported-by:
Jiri Kosina <jikos@kernel.org> Signed-off-by:
Luca Coelho <luciano.coelho@intel.com> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org>
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David S. Miller authored
Michael Chan says: ==================== bnxt_en: bug fixes. 3 bug fixes related to XDP ring accounting in bnxt_setup_tc(), freeing MSIX vectors when bnxt_re unregisters, and preserving the user-administered PF MAC address when disabling SRIOV. ==================== Signed-off-by:
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