- 18 Dec, 2016 8 commits
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Philippe Reynes authored
The ethtool api {get|set}_settings is deprecated. We move this driver to new api {get|set}_link_ksettings. Signed-off-by:Philippe Reynes <tremyfr@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Philippe Reynes authored
The ethtool api {get|set}_settings is deprecated. We move this driver to new api {get|set}_link_ksettings. Signed-off-by: -
Philippe Reynes authored
The ethtool api {get|set}_settings is deprecated. We move this driver to new api {get|set}_link_ksettings. Signed-off-by: -
Philippe Reynes authored
The ethtool api {get|set}_settings is deprecated. We move this driver to new api {get|set}_link_ksettings. Signed-off-by: -
David S. Miller authored
Daniel Borkmann says: ==================== Couple of BPF fixes This set contains three BPF fixes for net, one that addresses the complaint from Geert wrt static allocations, and the other is a fix wrt mem accounting that I found recently during testing and there's still one more fix on the map value marking. Thanks! v1 -> v2: - Patch 1 as is. - Fixed kbuild bot issue by letting charging helpers stay in the syscall.c, since there locked_vm is valid and only export the ones needed by bpf_prog_realloc(). Add empty stubs in case the bpf syscall is not enabled. - Added patch 3 that addresses one more issue in map val marking. ==================== Signed-off-by: -
Daniel Borkmann authored
Martin reported a verifier issue that hit the BUG_ON() for his test case in the mark_reg_unknown_value() function: [ 202.861380] kernel BUG at kernel/bpf/verifier.c:467! [...] [ 203.291109] Call Trace: [ 203.296501] [<ffffffff811364d5>] mark_map_reg+0x45/0x50 [ 203.308225] [<ffffffff81136558>] mark_map_regs+0x78/0x90 [ 203.320140] [<ffffffff8113938d>] do_check+0x226d/0x2c90 [ 203.331865] [<ffffffff8113a6ab>] bpf_check+0x48b/0x780 [ 203.343403] [<ffffffff81134c8e>] bpf_prog_load+0x27e/0x440 [ 203.355705] [<ffffffff8118a38f>] ? handle_mm_fault+0x11af/0x1230 [ 203.369158] [<ffffffff812d8188>] ? security_capable+0x48/0x60 [ 203.382035] [<ffffffff811351a4>] SyS_bpf+0x124/0x960 [ 203.393185] [<ffffffff810515f6>] ? __do_page_fault+0x276/0x490 [ 203.406258] [<ffffffff816db320>] entry_SYSCALL_64_fastpath+0x13/0x94 This issue got uncovered after the fix in a08dd0da ("bpf: fix regression on verifier pruning wrt map lookups"). The reason why it wasn't noticed before was, because as mentioned in a08dd0da, mark_map_regs() was doing the id matching incorrectly based on the uncached regs[regno].id. So, in the first loop, we walked all regs and as soon as we found regno == i, then this reg's id was cleared when calling mark_reg_unknown_value() thus that every subsequent register was probed against id of 0 (which, in combination with the PTR_TO_MAP_VALUE_OR_NULL type is an invalid condition that no other register state can hold), and therefore wasn't type transitioned such as in the spilled register case for the second loop. Now since that got fixed, it turned out that 57a09bf0 ("bpf: Detect identical PTR_TO_MAP_VALUE_OR_NULL registers") used mark_reg_unknown_value() incorrectly for the spilled regs, and thus hitting the BUG_ON() in some cases due to regno >= MAX_BPF_REG. Although spilled regs have the same type as the non-spilled regs for the verifier state, that is, struct bpf_reg_state, they are semantically different from the non-spilled regs. In other words, there can be up to 64 (MAX_BPF_STACK / BPF_REG_SIZE) spilled regs in the stack, for example, register R<x> could have been spilled by the program to stack location X, Y, Z, and in mark_map_regs() we need to scan these stack slots of type STACK_SPILL for potential registers that we have to transition from PTR_TO_MAP_VALUE_OR_NULL. Therefore, depending on the location, the spilled_regs regno can be a lot higher than just MAX_BPF_REG's value since we operate on stack instead. The reset in mark_reg_unknown_value() itself is just fine, only that the BUG_ON() was inappropriate for this. Fix it by making a __mark_reg_unknown_value() version that can be called from mark_map_reg() generically; we know for the non-spilled case that the regno is always < MAX_BPF_REG anyway. Fixes: 57a09bf0 ("bpf: Detect identical PTR_TO_MAP_VALUE_OR_NULL registers") Reported-by:
Martin KaFai Lau <kafai@fb.com> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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Daniel Borkmann authored
Commit aaac3ba9 ("bpf: charge user for creation of BPF maps and programs") made a wrong assumption of charging against prog->pages. Unlike map->pages, prog->pages are still subject to change when we need to expand the program through bpf_prog_realloc(). This can for example happen during verification stage when we need to expand and rewrite parts of the program. Should the required space cross a page boundary, then prog->pages is not the same anymore as its original value that we used to bpf_prog_charge_memlock() on. Thus, we'll hit a wrap-around during bpf_prog_uncharge_memlock() when prog is freed eventually. I noticed this that despite having unlimited memlock, programs suddenly refused to load with EPERM error due to insufficient memlock. There are two ways to fix this issue. One would be to add a cached variable to struct bpf_prog that takes a snapshot of prog->pages at the time of charging. The other approach is to also account for resizes. I chose to go with the latter for a couple of reasons: i) We want accounting rather to be more accurate instead of further fooling limits, ii) adding yet another page counter on struct bpf_prog would also be a waste just for this purpose. We also do want to charge as early as possible to avoid going into the verifier just to find out later on that we crossed limits. The only place that needs to be fixed is bpf_prog_realloc(), since only here we expand the program, so we try to account for the needed delta and should we fail, call-sites check for outcome anyway. On cBPF to eBPF migrations, we don't grab a reference to the user as they are charged differently. With that in place, my test case worked fine. Fixes: aaac3ba9 ("bpf: charge user for creation of BPF maps and programs") Signed-off-by:
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Daniel Borkmann authored
Geert rightfully complained that 7bd509e3 ("bpf: add prog_digest and expose it via fdinfo/netlink") added a too large allocation of variable 'raw' from bss section, and should instead be done dynamically: # ./scripts/bloat-o-meter kernel/bpf/core.o.1 kernel/bpf/core.o.2 add/remove: 3/0 grow/shrink: 0/0 up/down: 33291/0 (33291) function old new delta raw - 32832 +32832 [...] Since this is only relevant during program creation path, which can be considered slow-path anyway, lets allocate that dynamically and be not implicitly dependent on verifier mutex. Move bpf_prog_calc_digest() at the beginning of replace_map_fd_with_map_ptr() and also error handling stays straight forward. Reported-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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- 17 Dec, 2016 32 commits
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David S. Miller authored
Pablo Neira Ayuso says: ==================== GTP tunneling fixes for net The following patchset contains two GTP tunneling fixes for your net tree, they are: 1) Offset to IPv4 header in gtp_check_src_ms_ipv4() is incorrect, thus this function always succeeds and therefore this defeats this sanity check. This allows packets that have no PDP to go though, patch from Lionel Gauthier. 2) According to Note 0 of Figure 2 in Section 6 of 3GPP TS 29.060 v13.5.0 Release 13, always set GTPv1 reserved bit to zero. This may cause interoperability problems, patch from Harald Welte. Please, apply, thanks a lot! ==================== Signed-off-by: -
Harald Welte authored
When generating a GTPv1 header in gtp1_push_header(), initialize the 'reserved' bit to zero. All 3GPP specifications for GTPv1 from Release 99 through Release 13 agree that a transmitter shall set this bit to zero, see e.g. Note 0 of Figure 2 in Section 6 of 3GPP TS 29.060 v13.5.0 Release 13, available from http://www.etsi.org/deliver/etsi_ts/129000_129099/129060/13.05.00_60/ts_129060v130500p.pdfSigned-off-by:
Harald Welte <laforge@gnumonks.org> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Lionel Gauthier authored
gtp_check_src_ms_ipv4() did not find the PDP context matching with the UE IP address because the memory location is not right, but the result is inverted by the Boolean "not" operator. So whatever is the PDP context, any call to this function is successful. Signed-off-by:
Lionel Gauthier <Lionel.Gauthier@eurecom.fr> Signed-off-by:
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Kees Cook authored
Prepare to mark sensitive kernel structures for randomization by making sure they're using designated initializers. These were identified during allyesconfig builds of x86, arm, and arm64, with most initializer fixes extracted from grsecurity. Signed-off-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
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Kees Cook authored
Prepare to mark sensitive kernel structures for randomization by making sure they're using designated initializers. These were identified during allyesconfig builds of x86, arm, and arm64, with most initializer fixes extracted from grsecurity. Signed-off-by:
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Kees Cook authored
Prepare to mark sensitive kernel structures for randomization by making sure they're using designated initializers. These were identified during allyesconfig builds of x86, arm, and arm64, with most initializer fixes extracted from grsecurity. Signed-off-by:
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Kees Cook authored
Prepare to mark sensitive kernel structures for randomization by making sure they're using designated initializers. These were identified during allyesconfig builds of x86, arm, and arm64, with most initializer fixes extracted from grsecurity. Signed-off-by:
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Kees Cook authored
Prepare to mark sensitive kernel structures for randomization by making sure they're using designated initializers. These were identified during allyesconfig builds of x86, arm, and arm64, with most initializer fixes extracted from grsecurity. Signed-off-by:
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Kees Cook authored
Prepare to mark sensitive kernel structures for randomization by making sure they're using designated initializers. These were identified during allyesconfig builds of x86, arm, and arm64, with most initializer fixes extracted from grsecurity. Signed-off-by:
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Kees Cook authored
Prepare to mark sensitive kernel structures for randomization by making sure they're using designated initializers. These were identified during allyesconfig builds of x86, arm, and arm64, with most initializer fixes extracted from grsecurity. Signed-off-by:
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David S. Miller authored
John Fastabend says: ==================== XDP for virtio_net This implements virtio_net for the mergeable buffers and big_packet modes. I tested this with vhost_net running on qemu and did not see any issues. For testing num_buf > 1 I added a hack to vhost driver to only but 100 bytes per buffer. There are some restrictions for XDP to be enabled and work well (see patch 3) for more details. 1. GUEST_TSO{4|6} must be off 2. MTU must be less than PAGE_SIZE 3. queues must be available to dedicate to XDP 4. num_bufs received in mergeable buffers must be 1 5. big_packet mode must have all data on single page To test this I used pktgen in the hypervisor and ran the XDP sample programs xdp1 and xdp2 from ./samples/bpf in the host. The default mode that is used with these patches with Linux guest and QEMU/Linux hypervisor is the mergeable buffers mode. I tested this mode for 2+ days running xdp2 without issues. Additionally I did a series of driver unload/load tests to check the allocate/release paths. To test the big_packets path I applied the following simple patch against the virtio driver forcing big_packets mode, --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2242,7 +2242,7 @@ static int virtnet_probe(struct virtio_device *vdev) vi->big_packets = true; if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF)) - vi->mergeable_rx_bufs = true; + vi->mergeable_rx_bufs = false; if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF) || virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) I then repeated the tests with xdp1 and xdp2. After letting them run for a few hours I called it good enough. Testing the unexpected case where virtio receives a packet across multiple buffers required patching the hypervisor vhost driver to convince it to send these unexpected packets. Then I used ping with the -s option to trigger the case with multiple buffers. This mode is not expected to be used but as MST pointed out per spec it is not strictly speaking illegal to generate multi-buffer packets so we need someway to handle these. The following patch can be used to generate multiple buffers, --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1777,7 +1777,8 @@ static int translate_desc(struct vhost_virtqueue *vq, u64 _iov = iov + ret; size = node->size - addr + node->start; - _iov->iov_len = min((u64)len - s, size); + printk("%s: build 100 length headers!\n", __func__); + _iov->iov_len = min((u64)len - s, (u64)100);//size); _iov->iov_base = (void __user *)(unsigned long) (node->userspace_addr + addr - node->start); s += size; The qemu command I most frequently used for testing (although I did test various other combinations of devices) is the following, ./x86_64-softmmu/qemu-system-x86_64 \ -hda /var/lib/libvirt/images/Fedora-test0.img \ -m 4096 -enable-kvm -smp 2 \ -netdev tap,id=hn0,queues=4,vhost=on \ -device virtio-net-pci,netdev=hn0,mq=on,vectors=9,guest_tso4=off,guest_tso6=off \ -serial stdio The options 'guest_tso4=off,guest_tso6=off' are required because we do not support LRO with XDP at the moment. Please review any comments/feedback welcome as always. ==================== Acked-by:Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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John Fastabend authored
virtio_net XDP support expects receive buffers to be contiguous. If this is not the case we enable a slowpath to allow connectivity to continue but at a significan performance overhead associated with linearizing data. To make it painfully aware to users that XDP is running in a degraded mode we throw an xdp buffer error. To linearize packets we allocate a page and copy the segments of the data, including the header, into it. After this the page can be handled by XDP code flow as normal. Then depending on the return code the page is either freed or sent to the XDP xmit path. There is no attempt to optimize this path. This case is being handled simple as a precaution in case some unknown backend were to generate packets in this form. To test this I had to hack qemu and force it to generate these packets. I do not expect this case to be generated by "real" backends. Signed-off-by:
John Fastabend <john.r.fastabend@intel.com> Signed-off-by:
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John Fastabend authored
This adds support for the XDP_TX action to virtio_net. When an XDP program is run and returns the XDP_TX action the virtio_net XDP implementation will transmit the packet on a TX queue that aligns with the current CPU that the XDP packet was processed on. Before sending the packet the header is zeroed. Also XDP is expected to handle checksum correctly so no checksum offload support is provided. Signed-off-by:
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John Fastabend authored
XDP requires using isolated transmit queues to avoid interference with normal networking stack (BQL, NETDEV_TX_BUSY, etc). This patch adds a XDP queue per cpu when a XDP program is loaded and does not expose the queues to the OS via the normal API call to netif_set_real_num_tx_queues(). This way the stack will never push an skb to these queues. However virtio/vhost/qemu implementation only allows for creating TX/RX queue pairs at this time so creating only TX queues was not possible. And because the associated RX queues are being created I went ahead and exposed these to the stack and let the backend use them. This creates more RX queues visible to the network stack than TX queues which is worth mentioning but does not cause any issues as far as I can tell. Signed-off-by:
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John Fastabend authored
This adds XDP support to virtio_net. Some requirements must be met for XDP to be enabled depending on the mode. First it will only be supported with LRO disabled so that data is not pushed across multiple buffers. Second the MTU must be less than a page size to avoid having to handle XDP across multiple pages. If mergeable receive is enabled this patch only supports the case where header and data are in the same buf which we can check when a packet is received by looking at num_buf. If the num_buf is greater than 1 and a XDP program is loaded the packet is dropped and a warning is thrown. When any_header_sg is set this does not happen and both header and data is put in a single buffer as expected so we check this when XDP programs are loaded. Subsequent patches will process the packet in a degraded mode to ensure connectivity and correctness is not lost even if backend pushes packets into multiple buffers. If big packets mode is enabled and MTU/LRO conditions above are met then XDP is allowed. This patch was tested with qemu with vhost=on and vhost=off where mergeable and big_packet modes were forced via hard coding feature negotiation. Multiple buffers per packet was forced via a small test patch to vhost.c in the vhost=on qemu mode. Suggested-by:
Shrijeet Mukherjee <shrijeet@gmail.com> Signed-off-by:
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John Fastabend authored
This adds a warning for drivers to use when encountering an invalid buffer for XDP. For normal cases this should not happen but to catch this in virtual/qemu setups that I may not have expected from the emulation layer having a standard warning is useful. Signed-off-by:
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Xin Long authored
Prior to this patch, sctp_transport_lookup_process didn't rcu_read_unlock when it failed to find a transport by sctp_addrs_lookup_transport. This patch is to fix it by moving up rcu_read_unlock right before checking transport and also to remove the out path. Fixes: 1cceda78 ("sctp: fix the issue sctp_diag uses lock_sock in rcu_read_lock") Signed-off-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
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Xin Long authored
Since commit 7fda702f ("sctp: use new rhlist interface on sctp transport rhashtable"), sctp has changed to use rhlist_lookup to look up transport, but rhlist_lookup doesn't call rcu_read_lock inside, unlike rhashtable_lookup_fast. It is called in sctp_epaddr_lookup_transport and sctp_addrs_lookup_transport. sctp_addrs_lookup_transport is always in the protection of rcu_read_lock(), as __sctp_lookup_association is called in rx path or sctp_lookup_association which are in the protection of rcu_read_lock() already. But sctp_epaddr_lookup_transport is called by sctp_endpoint_lookup_assoc, it doesn't call rcu_read_lock, which may cause "suspicious rcu_dereference_check usage' in __rhashtable_lookup. This patch is to fix it by adding rcu_read_lock in sctp_endpoint_lookup_assoc before calling sctp_epaddr_lookup_transport. Fixes: 7fda702f ("sctp: use new rhlist interface on sctp transport rhashtable") Reported-by:
Dmitry Vyukov <dvyukov@google.com> Signed-off-by:
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David S. Miller authored
Madalin Bucur says: ==================== dpaa_eth: a couple of fixes This patch set introduces big endian accessors in the dpaa_eth driver making sure accesses to the QBMan HW are correct on little endian platforms. Removing a redundant Kconfig dependency on FSL_SOC. Adding myself as maintainer of the dpaa_eth driver. ==================== Signed-off-by: -
Madalin Bucur authored
Add record for Freescale QORIQ DPAA Ethernet driver adding myself as maintainer. Signed-off-by:
Madalin Bucur <madalin.bucur@nxp.com> Signed-off-by:
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Madalin Bucur authored
Signed-off-by:
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Claudiu Manoil authored
Ensure correct access to the big endian QMan HW through proper accessors. Signed-off-by:
Claudiu Manoil <claudiu.manoil@nxp.com> Signed-off-by:
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LABBE Corentin authored
Since the struct miscdevice have many members, it is dangerous to init it without members name relying only on member order. This patch add member name to the init declaration. Signed-off-by:
Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by:
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LABBE Corentin authored
The IRNET_MAJOR define is not used, so this patch remove it. Signed-off-by:
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LABBE Corentin authored
This patch move the define for IRNET_MINOR to include/linux/miscdevice.h It is better that all minor number definitions are in the same place. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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LABBE Corentin authored
The only use of miscdevice is irda_ppp so no need to include linux/miscdevice.h for all irda files. This patch move the linux/miscdevice.h include to irnet_ppp.h Signed-off-by:
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LABBE Corentin authored
irproc.c does not use any miscdevice so this patch remove this unnecessary inclusion. Signed-off-by:
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Daniel Mack authored
The member 'effective' in 'struct cgroup_bpf' is protected by RCU. Annotate it accordingly to squelch a sparse warning. Signed-off-by:
Daniel Mack <daniel@zonque.org> Acked-by:
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David S. Miller authored
Tom Herbert says: ==================== inet: Fixes for inet_csk_get_port and soreusport This patch set fixes a couple of issues I noticed while debugging our softlockup issue in inet_csk_get_port. - Don't allow jump into port scan in inet_csk_get_port if function was called with non-zero port number (looking up explicit port number). - When inet_csk_get_port is called with zero port number (ie. perform scan) an reuseport is set on the socket, don't match sockets that also have reuseport set. The intent from the user should be to get a new port number and then explictly bind other sockets to that number using soreuseport. Tested: Ran first patch on production workload with no ill effect. For second patch, ran a little listener application and first demonstrated that unbound sockets with soreuseport can indeed be bound to unrelated soreuseport sockets. ==================== Signed-off-by: -
Tom Herbert authored
A user may call listen with binding an explicit port with the intent that the kernel will assign an available port to the socket. In this case inet_csk_get_port does a port scan. For such sockets, the user may also set soreuseport with the intent a creating more sockets for the port that is selected. The problem is that the initial socket being opened could inadvertently choose an existing and unreleated port number that was already created with soreuseport. This patch adds a boolean parameter to inet_bind_conflict that indicates rather soreuseport is allowed for the check (in addition to sk->sk_reuseport). In calls to inet_bind_conflict from inet_csk_get_port the argument is set to true if an explicit port is being looked up (snum argument is nonzero), and is false if port scan is done. Signed-off-by:
Tom Herbert <tom@herbertland.com> Signed-off-by:
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Tom Herbert authored
inet_csk_get_port is called with port number (snum argument) that may be zero or nonzero. If it is zero, then the intent is to find an available ephemeral port number to bind to. If snum is non-zero then the caller is asking to allocate a specific port number. In the latter case we never want to perform the scan in ephemeral port range. It is conceivable that this can happen if the "goto again" in "tb_found:" is done. This patch adds a check that snum is zero before doing the "goto again". Signed-off-by:
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Daniel Borkmann authored
Running ./test_verifier as unprivileged lets 1 out of 98 tests fail: [...] #71 unpriv: check that printk is disallowed FAIL Unexpected error message! 0: (7a) *(u64 *)(r10 -8) = 0 1: (bf) r1 = r10 2: (07) r1 += -8 3: (b7) r2 = 8 4: (bf) r3 = r1 5: (85) call bpf_trace_printk#6 unknown func bpf_trace_printk#6 [...] The test case is correct, just that the error outcome changed with ebb676da ("bpf: Print function name in addition to function id"). Same as with e00c7b21 ("bpf: fix multiple issues in selftest suite and samples") issue 2), so just fix up the function name. Fixes: ebb676da ("bpf: Print function name in addition to function id") Signed-off-by:
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