- 24 Nov, 2020 5 commits
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Lincoln Ramsay authored
When performing IPv6 forwarding, there is an expectation that SKBs will have some headroom. When forwarding a packet from the aquantia driver, this does not always happen, triggering a kernel warning. aq_ring.c has this code (edited slightly for brevity): if (buff->is_eop && buff->len <= AQ_CFG_RX_FRAME_MAX - AQ_SKB_ALIGN) { skb = build_skb(aq_buf_vaddr(&buff->rxdata), AQ_CFG_RX_FRAME_MAX); } else { skb = napi_alloc_skb(napi, AQ_CFG_RX_HDR_SIZE); There is a significant difference between the SKB produced by these 2 code paths. When napi_alloc_skb creates an SKB, there is a certain amount of headroom reserved. However, this is not done in the build_skb codepath. As the hardware buffer that build_skb is built around does not handle the presence of the SKB header, this code path is being removed and the napi_alloc_skb path will always be used. This code path does have to copy the packet header into the SKB, but it adds the packet data as a frag. Fixes: 018423e9 ("net: ethernet: aquantia: Add ring support code") Signed-off-by:Lincoln Ramsay <lincoln.ramsay@opengear.com> Link: https://lore.kernel.org/r/MWHPR1001MB23184F3EAFA413E0D1910EC9E8FC0@MWHPR1001MB2318.namprd10.prod.outlook.comSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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Eyal Birger authored
In the patchset merged by commit b9fcf0a0 ("Merge branch 'support-AF_PACKET-for-layer-3-devices'") L3 devices which did not have header_ops were given one for the purpose of protocol parsing on af_packet transmit path. That change made af_packet receive path regard these devices as having a visible L3 header and therefore aligned incoming skb->data to point to the skb's mac_header. Some devices, such as ipip, xfrmi, and others, do not reset their mac_header prior to ingress and therefore their incoming packets became malformed. Ideally these devices would reset their mac headers, or af_packet would be able to rely on dev->hard_header_len being 0 for such cases, but it seems this is not the case. Fix by changing af_packet RX ll visibility criteria to include the existence of a '.create()' header operation, which is used when creating a device hard header - via dev_hard_header() - by upper layers, and does not exist in these L3 devices. As this predicate may be useful in other situations, add it as a common dev_has_header() helper in netdevice.h. Fixes: b9fcf0a0 ("Merge branch 'support-AF_PACKET-for-layer-3-devices'") Signed-off-by:
Eyal Birger <eyal.birger@gmail.com> Acked-by:
Jason A. Donenfeld <Jason@zx2c4.com> Acked-by:
Willem de Bruijn <willemb@google.com> Link: https://lore.kernel.org/r/20201121062817.3178900-1-eyal.birger@gmail.comSigned-off-by:
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Sylwester Dziedziuch authored
Prevent VFs from resetting when PF driver is being unloaded: - introduce new pf state: __I40E_VF_RESETS_DISABLED; - check if pf state has __I40E_VF_RESETS_DISABLED state set, if so, disable any further VFLR event notifications; - when i40e_remove (rmmod i40e) is called, disable any resets on the VFs; Previously if there were bare-metal VFs passing traffic and PF driver was removed, there was a possibility of VFs triggering a Tx timeout right before iavf_remove. This was causing iavf_close to not be called because there is a check in the beginning of iavf_remove that bails out early if adapter->state < IAVF_DOWN_PENDING. This makes it so some resources do not get cleaned up. Fixes: 6a9ddb36 ("i40e: disable IOV before freeing resources") Signed-off-by:
Slawomir Laba <slawomirx.laba@intel.com> Signed-off-by:
Brett Creeley <brett.creeley@intel.com> Signed-off-by:
Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com> Tested-by:
Konrad Jankowski <konrad0.jankowski@intel.com> Signed-off-by:
Tony Nguyen <anthony.l.nguyen@intel.com> Link: https://lore.kernel.org/r/20201120180640.3654474-1-anthony.l.nguyen@intel.comSigned-off-by:
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Stefano Garzarella authored
Starting from commit 8692cefc ("virtio_vsock: Fix race condition in virtio_transport_recv_pkt"), we discard packets in virtio_transport_recv_pkt() if the socket has been released. When the socket is connected, we schedule a delayed work to wait the RST packet from the other peer, also if SHUTDOWN_MASK is set in sk->sk_shutdown. This is done to complete the virtio-vsock shutdown algorithm, releasing the port assigned to the socket definitively only when the other peer has consumed all the packets. If we discard the RST packet received, the socket will be closed only when the VSOCK_CLOSE_TIMEOUT is reached. Sergio discovered the issue while running ab(1) HTTP benchmark using libkrun [1] and observing a latency increase with that commit. To avoid this issue, we discard packet only if the socket is really closed (SOCK_DONE flag is set). We also set SOCK_DONE in virtio_transport_release() when we don't need to wait any packets from the other peer (we didn't schedule the delayed work). In this case we remove the socket from the vsock lists, releasing the port assigned. [1] https://github.com/containers/libkrun Fixes: 8692cefc ("virtio_vsock: Fix race condition in virtio_transport_recv_pkt") Cc: justin.he@arm.com Reported-by:
Sergio Lopez <slp@redhat.com> Tested-by:
Stefano Garzarella <sgarzare@redhat.com> Acked-by:
Jia He <justin.he@arm.com> Link: https://lore.kernel.org/r/20201120104736.73749-1-sgarzare@redhat.comSigned-off-by:
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Ricardo Dias authored
When the TCP stack is in SYN flood mode, the server child socket is created from the SYN cookie received in a TCP packet with the ACK flag set. The child socket is created when the server receives the first TCP packet with a valid SYN cookie from the client. Usually, this packet corresponds to the final step of the TCP 3-way handshake, the ACK packet. But is also possible to receive a valid SYN cookie from the first TCP data packet sent by the client, and thus create a child socket from that SYN cookie. Since a client socket is ready to send data as soon as it receives the SYN+ACK packet from the server, the client can send the ACK packet (sent by the TCP stack code), and the first data packet (sent by the userspace program) almost at the same time, and thus the server will equally receive the two TCP packets with valid SYN cookies almost at the same instant. When such event happens, the TCP stack code has a race condition that occurs between the momement a lookup is done to the established connections hashtable to check for the existence of a connection for the same client, and the moment that the child socket is added to the established connections hashtable. As a consequence, this race condition can lead to a situation where we add two child sockets to the established connections hashtable and deliver two sockets to the userspace program to the same client. This patch fixes the race condition by checking if an existing child socket exists for the same client when we are adding the second child socket to the established connections socket. If an existing child socket exists, we drop the packet and discard the second child socket to the same client. Signed-off-by:
Ricardo Dias <rdias@singlestore.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Link: https://lore.kernel.org/r/20201120111133.GA67501@rdias-suse-pc.lanSigned-off-by:
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- 23 Nov, 2020 1 commit
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Jakub Kicinski authored
Merge tag 'wireless-drivers-2020-11-23' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers Kalle Valo says: ==================== wireless-drivers fixes for v5.10 First set of fixes for v5.10. One fix for iwlwifi kernel panic, others less notable. rtw88 * fix a bogus test found by clang iwlwifi * fix long memory reads causing soft lockup warnings * fix kernel panic during Channel Switch Announcement (CSA) * other smaller fixes MAINTAINERS * email address updates * tag 'wireless-drivers-2020-11-23' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers: iwlwifi: mvm: fix kernel panic in case of assert during CSA iwlwifi: pcie: set LTR to avoid completion timeout iwlwifi: mvm: write queue_sync_state only for sync iwlwifi: mvm: properly cancel a session protection for P2P iwlwifi: mvm: use the HOT_SPOT_CMD to cancel an AUX ROC iwlwifi: sta: set max HE max A-MPDU according to HE capa MAINTAINERS: update maintainers list for Cypress MAINTAINERS: update Yan-Hsuan's email address iwlwifi: pcie: limit memory read spin time rtw88: fix fw_fifo_addr check ==================== Link: https://lore.kernel.org/r/20201123161037.C11D1C43460@smtp.codeaurora.orgSigned-off-by:
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- 21 Nov, 2020 17 commits
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Jakub Kicinski authored
Lijun Pan says: ==================== ibmvnic: fixes in reset path Patch 1/3 and 2/3 notify peers in failover and migration reset. Patch 3/3 skips timeout reset if it is already resetting. ==================== Link: https://lore.kernel.org/r/20201120224013.46891-1-ljp@linux.ibm.comSigned-off-by:
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Lijun Pan authored
Sometimes it takes longer than 5 seconds (watchdog timeout) to complete failover, migration, and other resets. In stead of scheduling another timeout reset, we wait for the current one to complete. Suggested-by:
Brian King <brking@linux.vnet.ibm.com> Signed-off-by:
Lijun Pan <ljp@linux.ibm.com> Reviewed-by:
Dany Madden <drt@linux.ibm.com> Signed-off-by:
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Lijun Pan authored
Commit 61d3e1d9 ("ibmvnic: Remove netdev notify for failover resets") excluded the failover case for notify call because it said netdev_notify_peers() can cause network traffic to stall or halt. Current testing does not show network traffic stall or halt because of the notify call for failover event. netdev_notify_peers may be used when a device wants to inform the rest of the network about some sort of a reconfiguration such as failover or migration. It is unnecessary to call that in other events like FATAL, NON_FATAL, CHANGE_PARAM, and TIMEOUT resets since in those scenarios the hardware does not change. If the driver must do a hard reset, it is necessary to notify peers. Fixes: 61d3e1d9 ("ibmvnic: Remove netdev notify for failover resets") Suggested-by:
Pradeep Satyanarayana <pradeeps@linux.vnet.ibm.com> Signed-off-by:
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Lijun Pan authored
When netdev_notify_peers was substituted in commit 986103e7 ("net/ibmvnic: Fix RTNL deadlock during device reset"), call_netdevice_notifiers(NETDEV_RESEND_IGMP, dev) was missed. Fix it now. Fixes: 986103e7 ("net/ibmvnic: Fix RTNL deadlock during device reset") Signed-off-by:
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Jens Axboe authored
tun only checks the file O_NONBLOCK flag, but it should also be checking the iocb IOCB_NOWAIT flag. Any fops using ->read/write_iter() should check both, otherwise it breaks users that correctly expect O_NONBLOCK semantics if IOCB_NOWAIT is set. Signed-off-by:
Jens Axboe <axboe@kernel.dk> Link: https://lore.kernel.org/r/e9451860-96cc-c7c7-47b8-fe42cadd5f4c@kernel.dkSigned-off-by:
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Julian Wiedmann authored
Child sockets erroneously inherit their parent's sk_type (ie. SOCK_*), instead of the PF_IUCV protocol that the parent was created with in iucv_sock_create(). We're currently not using sk->sk_protocol ourselves, so this shouldn't have much impact (except eg. getting the output in skb_dump() right). Fixes: eac3731b ("[S390]: Add AF_IUCV socket support") Signed-off-by:
Julian Wiedmann <jwi@linux.ibm.com> Link: https://lore.kernel.org/r/20201120100657.34407-1-jwi@linux.ibm.comSigned-off-by:
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Yves-Alexis Perez authored
Starting with iOS 14 released in September 2020, connectivity using the personal hotspot USB tethering function of iOS devices is broken. Communication between the host and the device (for example ICMP traffic or DNS resolution using the DNS service running in the device itself) works fine, but communication to endpoints further away doesn't work. Investigation on the matter shows that no UDP and ICMP traffic from the tethered host is reaching the Internet at all. For TCP traffic there are exchanges between tethered host and server but packets are modified in transit leading to impossible communication. After some trials Matti Vuorela discovered that reducing the URB buffer size by two bytes restored the previous behavior. While a better solution might exist to fix the issue, since the protocol is not publicly documented and considering the small size of the fix, let's do that. Tested-by:
Matti Vuorela <matti.vuorela@bitfactor.fi> Signed-off-by:
Yves-Alexis Perez <corsac@corsac.net> Link: https://lore.kernel.org/linux-usb/CAAn0qaXmysJ9vx3ZEMkViv_B19ju-_ExN8Yn_uSefxpjS6g4Lw@mail.gmail.com/ Link: https://github.com/libimobiledevice/libimobiledevice/issues/1038 Link: https://lore.kernel.org/r/20201119172439.94988-1-corsac@corsac.netSigned-off-by:
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Tom Seewald authored
After commit 9d2e5e9e ("cxgb4/ch_ktls: decrypted bit is not enough") whenever CONFIG_TLS=m and CONFIG_CHELSIO_T4=y, the following build failure occurs: ld: drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.o: in function `cxgb_select_queue': cxgb4_main.c:(.text+0x2dac): undefined reference to `tls_validate_xmit_skb' Fix this by ensuring that if TLS is set to be a module, CHELSIO_T4 will also be compiled as a module. As otherwise the cxgb4 driver will not be able to access TLS' symbols. Fixes: 9d2e5e9e ("cxgb4/ch_ktls: decrypted bit is not enough") Signed-off-by:
Tom Seewald <tseewald@gmail.com> Link: https://lore.kernel.org/r/20201120192528.615-1-tseewald@gmail.comSigned-off-by:
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Jamie Iles authored
syzkaller found that with CONFIG_DEBUG_KOBJECT_RELEASE=y, releasing a struct slave device could result in the following splat: kobject: 'bonding_slave' (00000000cecdd4fe): kobject_release, parent 0000000074ceb2b2 (delayed 1000) bond0 (unregistering): (slave bond_slave_1): Releasing backup interface ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: workqueue_select_cpu_near kernel/workqueue.c:1549 [inline] ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x98 kernel/workqueue.c:1600 WARNING: CPU: 1 PID: 842 at lib/debugobjects.c:485 debug_print_object+0x180/0x240 lib/debugobjects.c:485 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 842 Comm: kworker/u4:4 Tainted: G S 5.9.0-rc8+ #96 Hardware name: linux,dummy-virt (DT) Workqueue: netns cleanup_net Call trace: dump_backtrace+0x0/0x4d8 include/linux/bitmap.h:239 show_stack+0x34/0x48 arch/arm64/kernel/traps.c:142 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x174/0x1f8 lib/dump_stack.c:118 panic+0x360/0x7a0 kernel/panic.c:231 __warn+0x244/0x2ec kernel/panic.c:600 report_bug+0x240/0x398 lib/bug.c:198 bug_handler+0x50/0xc0 arch/arm64/kernel/traps.c:974 call_break_hook+0x160/0x1d8 arch/arm64/kernel/debug-monitors.c:322 brk_handler+0x30/0xc0 arch/arm64/kernel/debug-monitors.c:329 do_debug_exception+0x184/0x340 arch/arm64/mm/fault.c:864 el1_dbg+0x48/0xb0 arch/arm64/kernel/entry-common.c:65 el1_sync_handler+0x170/0x1c8 arch/arm64/kernel/entry-common.c:93 el1_sync+0x80/0x100 arch/arm64/kernel/entry.S:594 debug_print_object+0x180/0x240 lib/debugobjects.c:485 __debug_check_no_obj_freed lib/debugobjects.c:967 [inline] debug_check_no_obj_freed+0x200/0x430 lib/debugobjects.c:998 slab_free_hook mm/slub.c:1536 [inline] slab_free_freelist_hook+0x190/0x210 mm/slub.c:1577 slab_free mm/slub.c:3138 [inline] kfree+0x13c/0x460 mm/slub.c:4119 bond_free_slave+0x8c/0xf8 drivers/net/bonding/bond_main.c:1492 __bond_release_one+0xe0c/0xec8 drivers/net/bonding/bond_main.c:2190 bond_slave_netdev_event drivers/net/bonding/bond_main.c:3309 [inline] bond_netdev_event+0x8f0/0xa70 drivers/net/bonding/bond_main.c:3420 notifier_call_chain+0xf0/0x200 kernel/notifier.c:83 __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x44/0x58 kernel/notifier.c:368 call_netdevice_notifiers_info+0xbc/0x150 net/core/dev.c:2033 call_netdevice_notifiers_extack net/core/dev.c:2045 [inline] call_netdevice_notifiers net/core/dev.c:2059 [inline] rollback_registered_many+0x6a4/0xec0 net/core/dev.c:9347 unregister_netdevice_many.part.0+0x2c/0x1c0 net/core/dev.c:10509 unregister_netdevice_many net/core/dev.c:10508 [inline] default_device_exit_batch+0x294/0x338 net/core/dev.c:10992 ops_exit_list.isra.0+0xec/0x150 net/core/net_namespace.c:189 cleanup_net+0x44c/0x888 net/core/net_namespace.c:603 process_one_work+0x96c/0x18c0 kernel/workqueue.c:2269 worker_thread+0x3f0/0xc30 kernel/workqueue.c:2415 kthread+0x390/0x498 kernel/kthread.c:292 ret_from_fork+0x10/0x18 arch/arm64/kernel/entry.S:925 This is a potential use-after-free if the sysfs nodes are being accessed whilst removing the struct slave, so wait for the object destruction to complete before freeing the struct slave itself. Fixes: 07699f9a ("bonding: add sysfs /slave dir for bond slave devices.") Fixes: a068aab4 ("bonding: Fix reference count leak in bond_sysfs_slave_add.") Cc: Qiushi Wu <wu000273@umn.edu> Cc: Jay Vosburgh <j.vosburgh@gmail.com> Cc: Veaceslav Falico <vfalico@gmail.com> Cc: Andy Gospodarek <andy@greyhouse.net> Signed-off-by:
Jamie Iles <jamie@nuviainc.com> Reviewed-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20201120142827.879226-1-jamie@nuviainc.comSigned-off-by:
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Jakub Kicinski authored
Julian Wiedmann says: ==================== s390/qeth: fixes 2020-11-20 This brings several fixes for qeth's af_iucv-specific code paths. Also one fix by Alexandra for the recently added BR_LEARNING_SYNC support. We want to trust the feature indication bit, so that HW can mask it out if there's any issues on their end. ==================== Link: https://lore.kernel.org/r/20201120090939.101406-1-jwi@linux.ibm.comSigned-off-by:
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Julian Wiedmann authored
When qeth_iqd_tx_complete() detects that a TX buffer requires additional async completion via QAOB, it might fail to replace the queue entry's metadata (and ends up triggering recovery). Assume now that the device gets torn down, overruling the recovery. If the QAOB notification then arrives before the tear down has sufficiently progressed, the buffer state is changed to QETH_QDIO_BUF_HANDLED_DELAYED by qeth_qdio_handle_aob(). The tear down code calls qeth_drain_output_queue(), where qeth_cleanup_handled_pending() will then attempt to replace such a buffer _again_. If it succeeds this time, the buffer ends up dangling in its replacement's ->next_pending list ... where it will never be freed, since there's no further call to qeth_cleanup_handled_pending(). But the second attempt isn't actually needed, we can simply leave the buffer on the queue and re-use it after a potential recovery has completed. The qeth_clear_output_buffer() in qeth_drain_output_queue() will ensure that it's in a clean state again. Fixes: 72861ae7 ("qeth: recovery through asynchronous delivery") Signed-off-by:
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Julian Wiedmann authored
The two expected notification sequences are 1. TX_NOTIFY_PENDING with a subsequent TX_NOTIFY_DELAYED_*, when our TX completion code first observed the pending TX and the QAOB then completes at a later time; or 2. TX_NOTIFY_OK, when qeth_qdio_handle_aob() picked up the QAOB completion before our TX completion code even noticed that the TX was pending. But as qeth_iqd_tx_complete() and qeth_qdio_handle_aob() can run concurrently, we may end up with a race that results in a sequence of TX_NOTIFY_DELAYED_* followed by TX_NOTIFY_PENDING. Which would confuse the af_iucv code in its tracking of pending transmits. Rework the notification code, so that qeth_qdio_handle_aob() defers its notification if the TX completion code is still active. Fixes: b3332930 ("qeth: add support for af_iucv HiperSockets transport") Signed-off-by:
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Julian Wiedmann authored
Calling into socket code is ugly already, at least check whether we are dealing with the expected sk_family. Only looking at skb->protocol is bound to cause troubles (consider eg. af_packet). Fixes: b3332930 ("qeth: add support for af_iucv HiperSockets transport") Signed-off-by:
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Alexandra Winter authored
Remove workaround that supported early hardware implementations of PNSO OC3. Rely on the 'enarf' feature bit instead. Fixes: fa115adf ("s390/qeth: Detect PNSO OC3 capability") Signed-off-by:
Alexandra Winter <wintera@linux.ibm.com> Reviewed-by:
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Jakub Kicinski authored
Alexander Duyck says: ==================== tcp: Address issues with ECT0 not being set in DCTCP packets This patch set is meant to address issues seen with SYN/ACK packets not containing the ECT0 bit when DCTCP is configured as the congestion control algorithm for a TCP socket. A simple test using "tcpdump" and "test_progs -t bpf_tcp_ca" makes the issue obvious. Looking at the packets will result in the SYN/ACK packet with an ECT0 bit that does not match the other packets for the flow when the congestion control agorithm is switch from the default. So for example going from non-DCTCP to a DCTCP congestion control algorithm we will see the SYN/ACK IPV6 header will not have ECT0 set while the other packets in the flow will. Likewise if we switch from a default of DCTCP to cubic we will see the ECT0 bit set in the SYN/ACK while the other packets in the flow will not. ==================== Link: https://lore.kernel.org/r/160582070138.66684.11785214534154816097.stgit@localhost.localdomainSigned-off-by:
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Alexander Duyck authored
When setting congestion control via a BPF program it is seen that the SYN/ACK for packets within a given flow will not include the ECT0 flag. A bit of simple printk debugging shows that when this is configured without BPF we will see the value INET_ECN_xmit value initialized in tcp_assign_congestion_control however when we configure this via BPF the socket is in the closed state and as such it isn't configured, and I do not see it being initialized when we transition the socket into the listen state. The result of this is that the ECT0 bit is configured based on whatever the default state is for the socket. Any easy way to reproduce this is to monitor the following with tcpdump: tools/testing/selftests/bpf/test_progs -t bpf_tcp_ca Without this patch the SYN/ACK will follow whatever the default is. If dctcp all SYN/ACK packets will have the ECT0 bit set, and if it is not then ECT0 will be cleared on all SYN/ACK packets. With this patch applied the SYN/ACK bit matches the value seen on the other packets in the given stream. Fixes: 91b5b21c ("bpf: Add support for changing congestion control") Signed-off-by:
Alexander Duyck <alexanderduyck@fb.com> Signed-off-by:
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Alexander Duyck authored
An issue was recently found where DCTCP SYN/ACK packets did not have the ECT bit set in the L3 header. A bit of code review found that the recent change referenced below had gone though and added a mask that prevented the ECN bits from being populated in the L3 header. This patch addresses that by rolling back the mask so that it is only applied to the flags coming from the incoming TCP request instead of applying it to the socket tos/tclass field. Doing this the ECT bits were restored in the SYN/ACK packets in my testing. One thing that is not addressed by this patch set is the fact that tcp_reflect_tos appears to be incompatible with ECN based congestion avoidance algorithms. At a minimum the feature should likely be documented which it currently isn't. Fixes: ac8f1710 ("tcp: reflect tos value received in SYN to the socket") Signed-off-by:
Wei Wang <weiwan@google.com> Signed-off-by:
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- 20 Nov, 2020 8 commits
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Ioana Ciornei authored
Explicitly enable the FSL_XGMAC_MDIO Kconfig option in order to have MDIO access to internal and external PHYs. Fixes: 71947923 ("dpaa2-eth: add MAC/PHY support through phylink") Signed-off-by:
Ioana Ciornei <ioana.ciornei@nxp.com> Link: https://lore.kernel.org/r/20201119145106.712761-1-ciorneiioana@gmail.comSigned-off-by:
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Raju Rangoju authored
SMT entry is allocated only when loopback Source MAC rewriting is requested. Accessing SMT entry for non smac rewrite cases results in kernel panic. Fix the panic caused by non smac rewrite Fixes: 937d8420 ("cxgb4: set up filter action after rewrites") Signed-off-by:
Raju Rangoju <rajur@chelsio.com> Link: https://lore.kernel.org/r/20201118143213.13319-1-rajur@chelsio.comSigned-off-by:
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Vadim Fedorenko authored
In case when tcp socket received FIN after some data and the parser haven't started before reading data caller will receive an empty buffer. This behavior differs from plain TCP socket and leads to special treating in user-space. The flow that triggers the race is simple. Server sends small amount of data right after the connection is configured to use TLS and closes the connection. In this case receiver sees TLS Handshake data, configures TLS socket right after Change Cipher Spec record. While the configuration is in process, TCP socket receives small Application Data record, Encrypted Alert record and FIN packet. So the TCP socket changes sk_shutdown to RCV_SHUTDOWN and sk_flag with SK_DONE bit set. The received data is not parsed upon arrival and is never sent to user-space. Patch unpauses parser directly if we have unparsed data in tcp receive queue. Fixes: fcf4793e ("tls: check RCV_SHUTDOWN in tls_wait_data") Signed-off-by:
Vadim Fedorenko <vfedorenko@novek.ru> Link: https://lore.kernel.org/r/1605801588-12236-1-git-send-email-vfedorenko@novek.ruSigned-off-by:
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Michael Chan authored
Jump to init_err_release to cleanup. bnxt_unmap_bars() will also be called but it will do nothing if the BARs are not mapped yet. Fixes: c0c050c5 ("bnxt_en: New Broadcom ethernet driver.") Reported-by:
Michael Chan <michael.chan@broadcom.com> Link: https://lore.kernel.org/r/1605858271-8209-1-git-send-email-michael.chan@broadcom.comSigned-off-by:
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Anmol Karn authored
rose_send_frame() dereferences `neigh->dev` when called from rose_transmit_clear_request(), and the first occurrence of the `neigh` is in rose_loopback_timer() as `rose_loopback_neigh`, and it is initialized in rose_add_loopback_neigh() as NULL. i.e when `rose_loopback_neigh` used in rose_loopback_timer() its `->dev` was still NULL and rose_loopback_timer() was calling rose_rx_call_request() without checking for NULL. - net/rose/rose_link.c This bug seems to get triggered in this line: rose_call = (ax25_address *)neigh->dev->dev_addr; Fix it by adding NULL checking for `rose_loopback_neigh->dev` in rose_loopback_timer(). Fixes: 1da177e4 ("Linux-2.6.12-rc2") Suggested-by:
Anmol Karn <anmol.karan123@gmail.com> Link: https://lore.kernel.org/r/20201119191043.28813-1-anmol.karan123@gmail.comSigned-off-by:
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Martin Habets authored
Email from solarflare.com will stop working. Update the maintainers. A replacement for linux-net-drivers@solarflare.com is not working yet, for now remove it. Signed-off-by:
Martin Habets <mhabets@solarflare.com> Signed-off-by:
Edward Cree <ecree@solarflare.com> Link: https://lore.kernel.org/r/20201120113207.GA1605547@mh-desktopSigned-off-by:
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Zhang Changzhong authored
Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function. Fixes: c0c050c5 ("bnxt_en: New Broadcom ethernet driver.") Reported-by:
Hulk Robot <hulkci@huawei.com> Signed-off-by:
Zhang Changzhong <zhangchangzhong@huawei.com> Reviewed-by:
Edwin Peer <edwin.peer@broadcom.com> Link: https://lore.kernel.org/r/1605792621-6268-1-git-send-email-zhangchangzhong@huawei.comSigned-off-by:
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Zhang Changzhong authored
Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function. Fixes: c213eae8 ("bnxt_en: Improve VF/PF link change logic.") Reported-by:
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- 19 Nov, 2020 9 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from Jakub Kicinski: "Networking fixes for 5.10-rc5, including fixes from the WiFi (mac80211), can and bpf (including the strncpy_from_user fix). Current release - regressions: - mac80211: fix memory leak of filtered powersave frames - mac80211: free sta in sta_info_insert_finish() on errors to avoid sleeping in atomic context - netlabel: fix an uninitialized variable warning added in -rc4 Previous release - regressions: - vsock: forward all packets to the host when no H2G is registered, un-breaking AWS Nitro Enclaves - net: Exempt multicast addresses from five-second neighbor lifetime requirement, decreasing the chances neighbor tables fill up - net/tls: fix corrupted data in recvmsg - qed: fix ILT configuration of SRC block - can: m_can: process interrupt only when not runtime suspended Previous release - always broken: - page_frag: Recover from memory pressure by not recycling pages allocating from the reserves - strncpy_from_user: Mask out bytes after NUL terminator - ip_tunnels: Set tunnel option flag only when tunnel metadata is present, always setting it confuses Open vSwitch - bpf, sockmap: - Fix partial copy_page_to_iter so progress can still be made - Fix socket memory accounting and obeying SO_RCVBUF - net: Have netpoll bring-up DSA management interface - net: bridge: add missing counters to ndo_get_stats64 callback - tcp: brr: only postpone PROBE_RTT if RTT is < current min_rtt - enetc: Workaround MDIO register access HW bug - net/ncsi: move netlink family registration to a subsystem init, instead of tying it to driver probe - net: ftgmac100: unregister NC-SI when removing driver to avoid crash - lan743x: - prevent interrupt storm on open - fix freeing skbs in the wrong context - net/mlx5e: Fix socket refcount leak on kTLS RX resync - net: dsa: mv88e6xxx: Avoid VLAN database corruption on 6097 - fix 21 unset return codes and other mistakes on error paths, mostly detected by the Hulk Robot" * tag 'net-5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (115 commits) fail_function: Remove a redundant mutex unlock selftest/bpf: Test bpf_probe_read_user_str() strips trailing bytes after NUL lib/strncpy_from_user.c: Mask out bytes after NUL terminator. net/smc: fix direct access to ib_gid_addr->ndev in smc_ib_determine_gid() net/smc: fix matching of existing link groups ipv6: Remove dependency of ipv6_frag_thdr_truncated on ipv6 module libbpf: Fix VERSIONED_SYM_COUNT number parsing net/mlx4_core: Fix init_hca fields offset atm: nicstar: Unmap DMA on send error page_frag: Recover from memory pressure net: dsa: mv88e6xxx: Wait for EEPROM done after HW reset mlxsw: core: Use variable timeout for EMAD retries mlxsw: Fix firmware flashing net: Have netpoll bring-up DSA management interface atl1e: fix error return code in atl1e_probe() atl1c: fix error return code in atl1c_probe() ah6: fix error return code in ah6_input() net: usb: qmi_wwan: Set DTR quirk for MR400 can: m_can: process interrupt only when not runtime suspended can: flexcan: flexcan_chip_start(): fix erroneous flexcan_transceiver_enable() during bus-off recovery ... -
git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds authored
Pull rdma fixes from Jason Gunthorpe: "The last two weeks have been quiet here, just the usual smattering of long standing bug fixes. A collection of error case bug fixes: - Improper nesting of spinlock types in cm - Missing error codes and kfree() - Ensure dma_virt_ops users have the right kconfig symbols to work properly - Compilation failure of tools/testing" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: tools/testing/scatterlist: Fix test to compile and run IB/hfi1: Fix error return code in hfi1_init_dd() RMDA/sw: Don't allow drivers using dma_virt_ops on highmem configs RDMA/pvrdma: Fix missing kfree() in pvrdma_register_device() RDMA/cm: Make the local_id_table xarray non-irq -
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfJakub Kicinski authored
Alexei Starovoitov says: ==================== 1) libbpf should not attempt to load unused subprogs, from Andrii. 2) Make strncpy_from_user() mask out bytes after NUL terminator, from Daniel. 3) Relax return code check for subprograms in the BPF verifier, from Dmitrii. 4) Fix several sockmap issues, from John. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: fail_function: Remove a redundant mutex unlock selftest/bpf: Test bpf_probe_read_user_str() strips trailing bytes after NUL lib/strncpy_from_user.c: Mask out bytes after NUL terminator. libbpf: Fix VERSIONED_SYM_COUNT number parsing bpf, sockmap: Avoid failures from skb_to_sgvec when skb has frag_list bpf, sockmap: Handle memory acct if skb_verdict prog redirects to self bpf, sockmap: Avoid returning unneeded EAGAIN when redirecting to self bpf, sockmap: Use truesize with sk_rmem_schedule() bpf, sockmap: Ensure SO_RCVBUF memory is observed on ingress redirect bpf, sockmap: Fix partial copy_page_to_iter so progress can still be made selftests/bpf: Fix error return code in run_getsockopt_test() bpf: Relax return code check for subprograms tools, bpftool: Add missing close before bpftool net attach exit MAINTAINERS/bpf: Update Andrii's entry. selftests/bpf: Fix unused attribute usage in subprogs_unused test bpf: Fix unsigned 'datasec_id' compared with zero in check_pseudo_btf_id bpf: Fix passing zero to PTR_ERR() in bpf_btf_printf_prepare libbpf: Don't attempt to load unused subprog as an entry-point BPF program ==================== Link: https://lore.kernel.org/r/20201119200721.288-1-alexei.starovoitov@gmail.comSigned-off-by:
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Luo Meng authored
Fix a mutex_unlock() issue where before copy_from_user() is not called mutex_locked. Fixes: 4b1a29a7 ("error-injection: Support fault injection framework") Reported-by:
Luo Meng <luomeng12@huawei.com> Signed-off-by:
Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by:
Alexei Starovoitov <ast@kernel.org> Acked-by:
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Alexei Starovoitov authored
Daniel Xu says: ==================== 6ae08ae3 ("bpf: Add probe_read_{user, kernel} and probe_read_{user, kernel}_str helpers") introduced a subtle bug where bpf_probe_read_user_str() would potentially copy a few extra bytes after the NUL terminator. This issue is particularly nefarious when strings are used as map keys, as seemingly identical strings can occupy multiple entries in a map. This patchset fixes the issue and introduces a selftest to prevent future regressions. v6 -> v7: * Add comments v5 -> v6: * zero-pad up to sizeof(unsigned long) after NUL v4 -> v5: * don't read potentially uninitialized memory v3 -> v4: * directly pass userspace pointer to prog * test more strings of different length v2 -> v3: * set pid filter before attaching prog in selftest * use long instead of int as bpf_probe_read_user_str() retval * style changes v1 -> v2: * add Fixes: tag * add selftest ==================== Signed-off-by:
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Daniel Xu authored
Previously, bpf_probe_read_user_str() could potentially overcopy the trailing bytes after the NUL due to how do_strncpy_from_user() does the copy in long-sized strides. The issue has been fixed in the previous commit. This commit adds a selftest that ensures we don't regress bpf_probe_read_user_str() again. Signed-off-by:
Daniel Xu <dxu@dxuuu.xyz> Signed-off-by:
Song Liu <songliubraving@fb.com> Acked-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/4d977508fab4ec5b7b574b85bdf8b398868b6ee9.1605642949.git.dxu@dxuuu.xyz
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Daniel Xu authored
do_strncpy_from_user() may copy some extra bytes after the NUL terminator into the destination buffer. This usually does not matter for normal string operations. However, when BPF programs key BPF maps with strings, this matters a lot. A BPF program may read strings from user memory by calling the bpf_probe_read_user_str() helper which eventually calls do_strncpy_from_user(). The program can then key a map with the destination buffer. BPF map keys are fixed-width and string-agnostic, meaning that map keys are treated as a set of bytes. The issue is when do_strncpy_from_user() overcopies bytes after the NUL terminator, it can result in seemingly identical strings occupying multiple slots in a BPF map. This behavior is subtle and totally unexpected by the user. This commit masks out the bytes following the NUL while preserving long-sized stride in the fast path. Fixes: 6ae08ae3 ("bpf: Add probe_read_{user, kernel} and probe_read_{user, kernel}_str helpers") Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: "Fixes for CVE-2020-4788. From Daniel's cover letter: IBM Power9 processors can speculatively operate on data in the L1 cache before it has been completely validated, via a way-prediction mechanism. It is not possible for an attacker to determine the contents of impermissible memory using this method, since these systems implement a combination of hardware and software security measures to prevent scenarios where protected data could be leaked. However these measures don't address the scenario where an attacker induces the operating system to speculatively execute instructions using data that the attacker controls. This can be used for example to speculatively bypass "kernel user access prevention" techniques, as discovered by Anthony Steinhauser of Google's Safeside Project. This is not an attack by itself, but there is a possibility it could be used in conjunction with side-channels or other weaknesses in the privileged code to construct an attack. This issue can be mitigated by flushing the L1 cache between privilege boundaries of concern. This patch series flushes the L1 cache on kernel entry (patch 2) and after the kernel performs any user accesses (patch 3). It also adds a self-test and performs some related cleanups" * tag 'powerpc-cve-2020-4788' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/64s: rename pnv|pseries_setup_rfi_flush to _setup_security_mitigations selftests/powerpc: refactor entry and rfi_flush tests selftests/powerpc: entry flush test powerpc: Only include kup-radix.h for 64-bit Book3S powerpc/64s: flush L1D after user accesses powerpc/64s: flush L1D on kernel entry selftests/powerpc: rfi_flush: disable entry flush if present
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git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds authored
Pull xtensa fixes from Max Filippov: - fix placement of cache alias remapping area - disable preemption around cache alias management calls - add missing __user annotation to strncpy_from_user argument * tag 'xtensa-20201119' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: uaccess: Add missing __user to strncpy_from_user() prototype xtensa: disable preemption around cache alias management calls xtensa: fix TLBTEMP area placement
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