- 17 Apr, 2019 11 commits
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Eric Dumazet authored
For some reason, tcp_grow_window() correctly tests if enough room is present before attempting to increase tp->rcv_ssthresh, but does not prevent it to grow past tcp_space() This is causing hard to debug issues, like failing the (__tcp_select_window(sk) >= tp->rcv_wnd) test in __tcp_ack_snd_check(), causing ACK delays and possibly slow flows. Depending on tcp_rmem[2], MTU, skb->len/skb->truesize ratio, we can see the problem happening on "netperf -t TCP_RR -- -r 2000,2000" after about 60 round trips, when the active side no longer sends immediate acks. This bug predates git history. Signed-off-by:
Eric Dumazet <edumazet@google.com> Acked-by:
Soheil Hassas Yeganeh <soheil@google.com> Acked-by:
Neal Cardwell <ncardwell@google.com> Acked-by:
Wei Wang <weiwan@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Claudiu Manoil authored
This is preventive cleanup that may save troubles later. No need to cancel repeateadly queued work if code is properly refactored. Don't let the ethtool -s process interfere with the stat workqueue scheduling. Signed-off-by:
Claudiu Manoil <claudiu.manoil@nxp.com> Signed-off-by:
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Claudiu Manoil authored
Preemption disabled at: [<ffff000008cabd54>] dev_set_rx_mode+0x1c/0x38 Call trace: [<ffff00000808a5c0>] dump_backtrace+0x0/0x3d0 [<ffff00000808a9a4>] show_stack+0x14/0x20 [<ffff000008e6c0c0>] dump_stack+0xac/0xe4 [<ffff0000080fe76c>] ___might_sleep+0x164/0x238 [<ffff0000080fe890>] __might_sleep+0x50/0x88 [<ffff0000082261e4>] kmem_cache_alloc+0x17c/0x1d0 [<ffff000000ea0ae8>] ocelot_set_rx_mode+0x108/0x188 [mscc_ocelot_common] [<ffff000008cabcf0>] __dev_set_rx_mode+0x58/0xa0 [<ffff000008cabd5c>] dev_set_rx_mode+0x24/0x38 Fixes: a556c76a ("net: mscc: Add initial Ocelot switch support") Signed-off-by:
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Nikolay Aleksandrov authored
Since the introduction of the vlan_stats_per_port option the netlink export of it has been broken since I made a typo and used the ifla attribute instead of the bridge option to retrieve its state. Sysfs export is fine, only netlink export has been affected. Fixes: 9163a0fc ("net: bridge: add support for per-port vlan stats") Signed-off-by:
Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
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Colin Ian King authored
There is a spelling mistake in a DP_INFO message, fix it. Signed-off-by:
Colin Ian King <colin.king@canonical.com> Reviewed-by:
Mukesh Ojha <mojha@codeaurora.org> Signed-off-by:
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Jie Liu authored
We find that sysctl_tipc_rmem and named_timeout do not have the right minimum setting. sysctl_tipc_rmem should be larger than zero, like sysctl_tcp_rmem. And named_timeout as a timeout setting should be not less than zero. Fixes: cc79dd1b ("tipc: change socket buffer overflow control to respect sk_rcvbuf") Fixes: a5325ae5 ("tipc: add name distributor resiliency queue") Signed-off-by:
Jie Liu <liujie165@huawei.com> Reported-by:
Qiang Ning <ningqiang1@huawei.com> Reviewed-by:
Zhiqiang Liu <liuzhiqiang26@huawei.com> Reviewed-by:
Miaohe Lin <linmiaohe@huawei.com> Signed-off-by:
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Tuong Lien authored
According to the link FSM, when a link endpoint got RESET_MSG (- a traditional one without the stopping bit) from its peer, it moves to PEER_RESET state and raises a LINK_DOWN event which then resets the link itself. Its state will become ESTABLISHING after the reset event and the link will be re-established soon after this endpoint starts to send ACTIVATE_MSG to the peer. There is no problem with this mechanism, however the link resetting has cleared the link 'in_session' flag (along with the other important link data such as: the link 'mtu') that was correctly set up at the 1st step (i.e. when this endpoint received the peer RESET_MSG). As a result, the link will become ESTABLISHED, but the 'in_session' flag is not set, and all STATE_MSG from its peer will be dropped at the link_validate_msg(). It means the link not synced and will sooner or later face a failure. Since the link reset action is obviously needed for a new link session (this is also true in the other situations), the problem here is that the link is re-established a bit too early when the link endpoints are not really in-sync yet. The commit forces a resync as already done in the previous commit 91986ee1 ("tipc: fix link session and re-establish issues") by simply varying the link 'peer_session' value at the link_reset(). Acked-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by:
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Yuya Kusakabe authored
skb_reorder_vlan_header() should move XDP meta data with ethernet header if XDP meta data exists. Fixes: de8f3a83 ("bpf: add meta pointer for direct access") Signed-off-by:
Yuya Kusakabe <yuya.kusakabe@gmail.com> Signed-off-by:
Takeru Hayasaka <taketarou2@gmail.com> Co-developed-by:
Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by:
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Gustavo A. R. Silva authored
arg is controlled by user-space, hence leading to a potential exploitation of the Spectre variant 1 vulnerability. This issue was detected with the help of Smatch: net/atm/lec.c:715 lec_mcast_attach() warn: potential spectre issue 'dev_lec' [r] (local cap) Fix this by sanitizing arg before using it to index dev_lec. Notice that given that speculation windows are large, the policy is to kill the speculation on the first load and not worry if it can be completed with a dependent load/store [1]. [1] https://lore.kernel.org/lkml/20180423164740.GY17484@dhcp22.suse.cz/Signed-off-by:
Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by:
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Ard Biesheuvel authored
The routine ptp_classifier_init() uses an initializer for an automatic struct type variable which refers to an __initdata symbol. This is perfectly legal, but may trigger a section mismatch warning when running the compiler in -fpic mode, due to the fact that the initializer may be emitted into an anonymous .data section thats lack the __init annotation. So work around it by using assignments instead. Signed-off-by:
Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
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Nikolay Aleksandrov authored
When the commit below was introduced it changed two visible things: - the skb was no longer passed through the protocol handlers with the original device - the skb was passed up the stack with skb->dev = bridge The first change broke af_packet sockets on bridge ports. For example we use them for hostapd which listens for ETH_P_PAE packets on the ports. We discussed two possible fixes: - create a clone and pass it through NF_HOOK(), act on the original skb based on the result - somehow signal to the caller from the okfn() that it was called, meaning the skb is ok to be passed, which this patch is trying to implement via returning 1 from the bridge link-local okfn() Note that we rely on the fact that NF_QUEUE/STOLEN would return 0 and drop/error would return < 0 thus the okfn() is called only when the return was 1, so we signal to the caller that it was called by preserving the return value from nf_hook(). Fixes: 8626c56c ("bridge: fix potential use-after-free when hook returns QUEUE or STOLEN verdict") Signed-off-by:
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- 16 Apr, 2019 1 commit
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Colin Ian King authored
There is a spelling mistake in a BNX2X_ERR message, fix it. Signed-off-by:
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- 15 Apr, 2019 5 commits
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Jonathan Lemon authored
When __ip6_rt_update_pmtu() is called, rt->from is RCU dereferenced, but is never checked for null - rt6_flush_exceptions() may have removed the entry. [ 1913.989004] RIP: 0010:ip6_rt_cache_alloc+0x13/0x170 [ 1914.209410] Call Trace: [ 1914.214798] <IRQ> [ 1914.219226] __ip6_rt_update_pmtu+0xb0/0x190 [ 1914.228649] ip6_tnl_xmit+0x2c2/0x970 [ip6_tunnel] [ 1914.239223] ? ip6_tnl_parse_tlv_enc_lim+0x32/0x1a0 [ip6_tunnel] [ 1914.252489] ? __gre6_xmit+0x148/0x530 [ip6_gre] [ 1914.262678] ip6gre_tunnel_xmit+0x17e/0x3c7 [ip6_gre] [ 1914.273831] dev_hard_start_xmit+0x8d/0x1f0 [ 1914.283061] sch_direct_xmit+0xfa/0x230 [ 1914.291521] __qdisc_run+0x154/0x4b0 [ 1914.299407] net_tx_action+0x10e/0x1f0 [ 1914.307678] __do_softirq+0xca/0x297 [ 1914.315567] irq_exit+0x96/0xa0 [ 1914.322494] smp_apic_timer_interrupt+0x68/0x130 [ 1914.332683] apic_timer_interrupt+0xf/0x20 [ 1914.341721] </IRQ> Fixes: a68886a6 ("net/ipv6: Make from in rt6_info rcu protected") Signed-off-by:
Jonathan Lemon <jonathan.lemon@gmail.com> Reviewed-by:
David Ahern <dsahern@gmail.com> Reviewed-by:
Martin KaFai Lau <kafai@fb.com> Signed-off-by:
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Lukas Bulwahn authored
MAINTAINERS contains a lower-case and upper-case variant of Woojung Huh' s email address. Only keep the lower-case variant in MAINTAINERS. Signed-off-by:
Lukas Bulwahn <lukas.bulwahn@gmail.com> Acked-by:
Woojung Huh <woojung.huh@microchip.com> Signed-off-by:
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Sabrina Dubroca authored
When a bond is enslaved to another bond, bond_netdev_event() only handles the event as if the bond is a master, and skips treating the bond as a slave. This leads to a refcount leak on the slave, since we don't remove the adjacency to its master and the master holds a reference on the slave. Reproducer: ip link add bondL type bond ip link add bondU type bond ip link set bondL master bondU ip link del bondL No "Fixes:" tag, this code is older than git history. Signed-off-by:
Sabrina Dubroca <sd@queasysnail.net> Signed-off-by:
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Wang Hai authored
This reverts commit 6b70fc94. The reverted bugfix will cause another issue. Reported by syzbot+6024817a931b2830bc93@syzkaller.appspotmail.com. See https://syzkaller.appspot.com/x/log.txt?x=1737671b200000 for details. Signed-off-by:
Wang Hai <wanghai26@huawei.com> Acked-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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David S. Miller authored
Merge tag 'wireless-drivers-for-davem-2019-04-15' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers Kalle Valo says: ==================== wireless-drivers fixes for 5.1 Second set of fixes for 5.1. iwlwifi * add some new PCI IDs (plus a struct name change they depend on) * fix crypto with new devices, namely 22560 and above * fix for a potential deadlock in the TX path * a fix for offloaded rate-control * support new PCI HW IDs which use a new FW mt76 * fix lock initialisation and a possible deadlock * aggregation fixes rt2x00 * fix sequence numbering during retransmits ==================== Signed-off-by:
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- 14 Apr, 2019 8 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linuxDavid S. Miller authored
Saeed Mahameed says: ==================== Mellanox, mlx5 fixes 2019-04-09 This series provides some fixes to mlx5 driver. I've cc'ed some of the checksum fixes to Eric Dumazet and i would like to get his feedback before you pull. For -stable v4.19 ('net/mlx5: FPGA, tls, idr remove on flow delete') ('net/mlx5: FPGA, tls, hold rcu read lock a bit longer') For -stable v4.20 ('net/mlx5e: Rx, Check ip headers sanity') ('Revert "net/mlx5e: Enable reporting checksum unnecessary also for L3 packets"') ('net/mlx5e: Rx, Fixup skb checksum for packets with tail padding') For -stable v5.0 ('net/mlx5e: Switch to Toeplitz RSS hash by default') ('net/mlx5e: Protect against non-uplink representor for encap') ('net/mlx5e: XDP, Avoid checksum complete when XDP prog is loaded') ==================== Signed-off-by: -
Eric Dumazet authored
Jakub forgot to either use nlmsg_len() or nlmsg_msg_size(), allowing KMSAN to detect a possible uninit-value in rtnl_stats_get BUG: KMSAN: uninit-value in rtnl_stats_get+0x6d9/0x11d0 net/core/rtnetlink.c:4997 CPU: 0 PID: 10428 Comm: syz-executor034 Not tainted 5.1.0-rc2+ #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x173/0x1d0 lib/dump_stack.c:113 kmsan_report+0x131/0x2a0 mm/kmsan/kmsan.c:619 __msan_warning+0x7a/0xf0 mm/kmsan/kmsan_instr.c:310 rtnl_stats_get+0x6d9/0x11d0 net/core/rtnetlink.c:4997 rtnetlink_rcv_msg+0x115b/0x1550 net/core/rtnetlink.c:5192 netlink_rcv_skb+0x431/0x620 net/netlink/af_netlink.c:2485 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5210 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0xf3e/0x1020 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x127f/0x1300 net/netlink/af_netlink.c:1925 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg net/socket.c:632 [inline] ___sys_sendmsg+0xdb3/0x1220 net/socket.c:2137 __sys_sendmsg net/socket.c:2175 [inline] __do_sys_sendmsg net/socket.c:2184 [inline] __se_sys_sendmsg+0x305/0x460 net/socket.c:2182 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2182 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Fixes: 51bc860d ("rtnetlink: stats: validate attributes in get as well as dumps") Signed-off-by:
syzbot <syzkaller@googlegroups.com> Cc: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by:
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David S. Miller authored
Denis Bolotin says: ==================== qed: Fix the Doorbell Overflow Recovery mechanism This patch series fixes and improves the doorbell recovery mechanism. The main goals of this series are to fix missing attentions from the doorbells block (DORQ) or not handling them properly, and execute the recovery from periodic handler instead of the attention handler. Please consider applying the series to net. ==================== Signed-off-by: -
Denis Bolotin authored
Separate the overflow handling from the hardware interrupt status analysis. The interrupt status is a single register and is common for all PFs. The first PF reading the register is not necessarily the one who overflowed. All PFs must check their overflow status on every attention. In this change we clear the sticky indication in the attention handler to allow doorbells to be processed again as soon as possible, but running the doorbell recovery is scheduled for the periodic handler to reduce the time spent in the attention handler. Checking the need for DORQ flush was changed to "db_bar_no_edpm" because qed_edpm_enabled()'s result could change dynamically and might have prevented a needed flush. Signed-off-by:
Denis Bolotin <dbolotin@marvell.com> Signed-off-by:
Michal Kalderon <mkalderon@marvell.com> Signed-off-by:
Ariel Elior <aelior@marvell.com> Signed-off-by:
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Denis Bolotin authored
When the DORQ (doorbell block) is overflowed, all PFs get attentions at the same time. If one PF finished handling the attention before another PF even started, the second PF might miss the DORQ's attention bit and not handle the attention at all. If the DORQ attention is missed and the issue is not resolved, another attention will not be sent, therefore each attention is treated as a potential DORQ attention. As a result, the attention callback is called more frequently so the debug print was moved to reduce its quantity. The number of periodic doorbell recovery handler schedules was reduced because it was the previous way to mitigating the missed attention issue. Signed-off-by:
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Denis Bolotin authored
Fix the condition which verifies that doorbell address is inside the doorbell bar by checking that the end of the address is within range as well. Signed-off-by:
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Denis Bolotin authored
DB_REC_DRY_RUN (running doorbell recovery without sending doorbells) is never used. DB_REC_ONCE (send a single doorbell from the doorbell recovery) is not needed anymore because by running the periodic handler we make sure we check the overflow status later instead. This patch is needed because in the next patches, the only doorbell recovery type being used is DB_REC_REAL_DEAL, and the fixes are much cleaner without this enum. Signed-off-by:
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Eric Dumazet authored
fib_compute_spec_dst() needs to be called under rcu protection. syzbot reported : WARNING: suspicious RCU usage 5.1.0-rc4+ #165 Not tainted include/linux/inetdevice.h:220 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by swapper/0/0: #0: 0000000051b67925 ((&n->timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:170 [inline] #0: 0000000051b67925 ((&n->timer)){+.-.}, at: call_timer_fn+0xda/0x720 kernel/time/timer.c:1315 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.1.0-rc4+ #165 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x153/0x15d kernel/locking/lockdep.c:5162 __in_dev_get_rcu include/linux/inetdevice.h:220 [inline] fib_compute_spec_dst+0xbbd/0x1030 net/ipv4/fib_frontend.c:294 spec_dst_fill net/ipv4/ip_options.c:245 [inline] __ip_options_compile+0x15a7/0x1a10 net/ipv4/ip_options.c:343 ipv4_link_failure+0x172/0x400 net/ipv4/route.c:1195 dst_link_failure include/net/dst.h:427 [inline] arp_error_report+0xd1/0x1c0 net/ipv4/arp.c:297 neigh_invalidate+0x24b/0x570 net/core/neighbour.c:995 neigh_timer_handler+0xc35/0xf30 net/core/neighbour.c:1081 call_timer_fn+0x190/0x720 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers kernel/time/timer.c:1681 [inline] __run_timers kernel/time/timer.c:1649 [inline] run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694 __do_softirq+0x266/0x95a kernel/softirq.c:293 invoke_softirq kernel/softirq.c:374 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:414 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 Fixes: ed0de45a ("ipv4: recompile ip options in ipv4_link_failure") Signed-off-by:
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- 13 Apr, 2019 1 commit
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Stephen Suryaputra authored
Recompile IP options since IPCB may not be valid anymore when ipv4_link_failure is called from arp_error_report. Refer to the commit 3da1ed7a ("net: avoid use IPCB in cipso_v4_error") and the commit before that (9ef6b42a) for a similar issue. Signed-off-by:
Stephen Suryaputra <ssuryaextr@gmail.com> Signed-off-by:
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- 12 Apr, 2019 14 commits
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David S. Miller authored
David Howells says: ==================== rxrpc: Fixes Here is a collection of fixes for rxrpc: (1) rxrpc_error_report() needs to call sock_error() to clear the error code from the UDP transport socket, lest it be unexpectedly revisited on the next kernel_sendmsg() call. This has been causing all sorts of weird effects in AFS as the effects have typically been felt by the wrong RxRPC call. (2) Allow a kernel user of AF_RXRPC to easily detect if an rxrpc call has completed. (3) Allow errors incurred by attempting to transmit data through the UDP socket to get back up the stack to AFS. (4) Make AFS use (2) to abort the synchronous-mode call waiting loop if the rxrpc-level call completed. (5) Add a missing tracepoint case for tracing abort reception. (6) Fix detection and handling of out-of-order ACKs. ==================== Tested-by:Jonathan Billings <jsbillin@umich.edu> Signed-off-by:
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Jeffrey Altman authored
The rxrpc packet serial number cannot be safely used to compute out of order ack packets for several reasons: 1. The allocation of serial numbers cannot be assumed to imply the order by which acks are populated and transmitted. In some rxrpc implementations, delayed acks and ping acks are transmitted asynchronously to the receipt of data packets and so may be transmitted out of order. As a result, they can race with idle acks. 2. Serial numbers are allocated by the rxrpc connection and not the call and as such may wrap independently if multiple channels are in use. In any case, what matters is whether the ack packet provides new information relating to the bounds of the window (the firstPacket and previousPacket in the ACK data). Fix this by discarding packets that appear to wind back the window bounds rather than on serial number procession. Fixes: 298bc15b ("rxrpc: Only take the rwind and mtu values from latest ACK") Signed-off-by:Jeffrey Altman <jaltman@auristor.com> Signed-off-by:
David Howells <dhowells@redhat.com> Tested-by:
Marc Dionne <marc.dionne@auristor.com> Signed-off-by:
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David Howells authored
Trace received calls that are aborted due to a connection abort, typically because of authentication failure. Without this, connection aborts don't show up in the trace log. Signed-off-by:
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Marc Dionne authored
Check the state of the rxrpc call backing an afs call in each iteration of the call wait loop in case the rxrpc call has already been terminated at the rxrpc layer. Interrupt the wait loop and mark the afs call as complete if the rxrpc layer call is complete. There were cases where rxrpc errors were not passed up to afs, which could result in this loop waiting forever for an afs call to transition to AFS_CALL_COMPLETE while the rx call was already complete. Signed-off-by:
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Marc Dionne authored
Change rxrpc_queue_packet()'s signature so that it can return any error code it may encounter when trying to send the packet. This allows the caller to eventually do something in case of error - though it should be noted that the packet has been queued and a resend is scheduled. Signed-off-by:
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Marc Dionne authored
Make rxrpc_kernel_check_life() pass back the life counter through the argument list and return true if the call has not yet completed. Suggested-by:
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Marc Dionne authored
When an ICMP or ICMPV6 error is received, the error will be attached to the socket (sk_err) and the report function will get called. Clear any pending error here by calling sock_error(). This would cause the following attempt to use the socket to fail with the error code stored by the ICMP error, resulting in unexpected errors with various side effects depending on the context. Signed-off-by:
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Colin Ian King authored
The err2 error return path calls qede_ptp_disable that cleans up on an error and frees ptp. After this, the free'd ptp is dereferenced when ptp->clock is set to NULL and the code falls-through to error path err1 that frees ptp again. Fix this by calling qede_ptp_disable and exiting via an error return path that does not set ptp->clock or kfree ptp. Addresses-Coverity: ("Write to pointer after free") Fixes: 03574497 ("qede: Add support for PTP resource locking.") Signed-off-by: -
Colin Ian King authored
Currently if a pci dma mapping failure is detected a free'd memblock address is returned rather than a NULL (that indicates an error). Fix this by ensuring NULL is returned on this error case. Addresses-Coverity: ("Use after free") Fixes: 528f7272 ("vxge: code cleanup and reorganization") Signed-off-by: -
Kalle Valo authored
Merge tag 'iwlwifi-for-kalle-2019-04-03' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes Second batch of iwlwifi fixes intended for v5.1 * fix for a potential deadlock in the TX path; * a fix for offloaded rate-control; * support new PCI HW IDs which use a new FW;
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Stanislaw Gruszka authored
Move ieee80211_tx_status_ext() outside of status_list lock section in order to avoid locking dependency and possible deadlock reposed by LOCKDEP in below warning. Also do mt76_tx_status_lock() just before it's needed. [ 440.224832] WARNING: possible circular locking dependency detected [ 440.224833] 5.1.0-rc2+ #22 Not tainted [ 440.224834] ------------------------------------------------------ [ 440.224835] kworker/u16:28/2362 is trying to acquire lock: [ 440.224836] 0000000089b8cacf (&(&q->lock)->rlock#2){+.-.}, at: mt76_wake_tx_queue+0x4c/0xb0 [mt76] [ 440.224842] but task is already holding lock: [ 440.224842] 000000002cfedc59 (&(&sta->lock)->rlock){+.-.}, at: ieee80211_stop_tx_ba_cb+0x32/0x1f0 [mac80211] [ 440.224863] which lock already depends on the new lock. [ 440.224863] the existing dependency chain (in reverse order) is: [ 440.224864] -> #3 (&(&sta->lock)->rlock){+.-.}: [ 440.224869] _raw_spin_lock_bh+0x34/0x40 [ 440.224880] ieee80211_start_tx_ba_session+0xe4/0x3d0 [mac80211] [ 440.224894] minstrel_ht_get_rate+0x45c/0x510 [mac80211] [ 440.224906] rate_control_get_rate+0xc1/0x140 [mac80211] [ 440.224918] ieee80211_tx_h_rate_ctrl+0x195/0x3c0 [mac80211] [ 440.224930] ieee80211_xmit_fast+0x26d/0xa50 [mac80211] [ 440.224942] __ieee80211_subif_start_xmit+0xfc/0x310 [mac80211] [ 440.224954] ieee80211_subif_start_xmit+0x38/0x390 [mac80211] [ 440.224956] dev_hard_start_xmit+0xb8/0x300 [ 440.224957] __dev_queue_xmit+0x7d4/0xbb0 [ 440.224968] ip6_finish_output2+0x246/0x860 [ipv6] [ 440.224978] mld_sendpack+0x1bd/0x360 [ipv6] [ 440.224987] mld_ifc_timer_expire+0x1a4/0x2f0 [ipv6] [ 440.224989] call_timer_fn+0x89/0x2a0 [ 440.224990] run_timer_softirq+0x1bd/0x4d0 [ 440.224992] __do_softirq+0xdb/0x47c [ 440.224994] irq_exit+0xfa/0x100 [ 440.224996] smp_apic_timer_interrupt+0x9a/0x220 [ 440.224997] apic_timer_interrupt+0xf/0x20 [ 440.224999] cpuidle_enter_state+0xc1/0x470 [ 440.225000] do_idle+0x21a/0x260 [ 440.225001] cpu_startup_entry+0x19/0x20 [ 440.225004] start_secondary+0x135/0x170 [ 440.225006] secondary_startup_64+0xa4/0xb0 [ 440.225007] -> #2 (&(&sta->rate_ctrl_lock)->rlock){+.-.}: [ 440.225009] _raw_spin_lock_bh+0x34/0x40 [ 440.225022] rate_control_tx_status+0x4f/0xb0 [mac80211] [ 440.225031] ieee80211_tx_status_ext+0x142/0x1a0 [mac80211] [ 440.225035] mt76x02_send_tx_status+0x2e4/0x340 [mt76x02_lib] [ 440.225037] mt76x02_tx_status_data+0x31/0x40 [mt76x02_lib] [ 440.225040] mt76u_tx_status_data+0x51/0xa0 [mt76_usb] [ 440.225042] process_one_work+0x237/0x5d0 [ 440.225043] worker_thread+0x3c/0x390 [ 440.225045] kthread+0x11d/0x140 [ 440.225046] ret_from_fork+0x3a/0x50 [ 440.225047] -> #1 (&(&list->lock)->rlock#8){+.-.}: [ 440.225049] _raw_spin_lock_bh+0x34/0x40 [ 440.225052] mt76_tx_status_skb_add+0x51/0x100 [mt76] [ 440.225054] mt76x02u_tx_prepare_skb+0xbd/0x116 [mt76x02_usb] [ 440.225056] mt76u_tx_queue_skb+0x5f/0x180 [mt76_usb] [ 440.225058] mt76_tx+0x93/0x190 [mt76] [ 440.225070] ieee80211_tx_frags+0x148/0x210 [mac80211] [ 440.225081] __ieee80211_tx+0x75/0x1b0 [mac80211] [ 440.225092] ieee80211_tx+0xde/0x110 [mac80211] [ 440.225105] __ieee80211_tx_skb_tid_band+0x72/0x90 [mac80211] [ 440.225122] ieee80211_send_auth+0x1f3/0x360 [mac80211] [ 440.225141] ieee80211_auth.cold.40+0x6c/0x100 [mac80211] [ 440.225156] ieee80211_mgd_auth.cold.50+0x132/0x15f [mac80211] [ 440.225171] cfg80211_mlme_auth+0x149/0x360 [cfg80211] [ 440.225181] nl80211_authenticate+0x273/0x2e0 [cfg80211] [ 440.225183] genl_family_rcv_msg+0x196/0x3a0 [ 440.225184] genl_rcv_msg+0x47/0x8e [ 440.225185] netlink_rcv_skb+0x3a/0xf0 [ 440.225187] genl_rcv+0x24/0x40 [ 440.225188] netlink_unicast+0x16d/0x210 [ 440.225189] netlink_sendmsg+0x204/0x3b0 [ 440.225191] sock_sendmsg+0x36/0x40 [ 440.225193] ___sys_sendmsg+0x259/0x2b0 [ 440.225194] __sys_sendmsg+0x47/0x80 [ 440.225196] do_syscall_64+0x60/0x1f0 [ 440.225197] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 440.225198] -> #0 (&(&q->lock)->rlock#2){+.-.}: [ 440.225200] lock_acquire+0xb9/0x1a0 [ 440.225202] _raw_spin_lock_bh+0x34/0x40 [ 440.225204] mt76_wake_tx_queue+0x4c/0xb0 [mt76] [ 440.225215] ieee80211_agg_start_txq+0xe8/0x2b0 [mac80211] [ 440.225225] ieee80211_stop_tx_ba_cb+0xb8/0x1f0 [mac80211] [ 440.225235] ieee80211_ba_session_work+0x1c1/0x2f0 [mac80211] [ 440.225236] process_one_work+0x237/0x5d0 [ 440.225237] worker_thread+0x3c/0x390 [ 440.225239] kthread+0x11d/0x140 [ 440.225240] ret_from_fork+0x3a/0x50 [ 440.225240] other info that might help us debug this: [ 440.225241] Chain exists of: &(&q->lock)->rlock#2 --> &(&sta->rate_ctrl_lock)->rlock --> &(&sta->lock)->rlock [ 440.225243] Possible unsafe locking scenario: [ 440.225244] CPU0 CPU1 [ 440.225244] ---- ---- [ 440.225245] lock(&(&sta->lock)->rlock); [ 440.225245] lock(&(&sta->rate_ctrl_lock)->rlock); [ 440.225246] lock(&(&sta->lock)->rlock); [ 440.225247] lock(&(&q->lock)->rlock#2); [ 440.225248] *** DEADLOCK *** [ 440.225249] 5 locks held by kworker/u16:28/2362: [ 440.225250] #0: 0000000048fcd291 ((wq_completion)phy0){+.+.}, at: process_one_work+0x1b5/0x5d0 [ 440.225252] #1: 00000000f1c6828f ((work_completion)(&sta->ampdu_mlme.work)){+.+.}, at: process_one_work+0x1b5/0x5d0 [ 440.225254] #2: 00000000433d2b2c (&sta->ampdu_mlme.mtx){+.+.}, at: ieee80211_ba_session_work+0x5c/0x2f0 [mac80211] [ 440.225265] #3: 000000002cfedc59 (&(&sta->lock)->rlock){+.-.}, at: ieee80211_stop_tx_ba_cb+0x32/0x1f0 [mac80211] [ 440.225276] #4: 000000009d7b9a44 (rcu_read_lock){....}, at: ieee80211_agg_start_txq+0x33/0x2b0 [mac80211] [ 440.225286] stack backtrace: [ 440.225288] CPU: 2 PID: 2362 Comm: kworker/u16:28 Not tainted 5.1.0-rc2+ #22 [ 440.225289] Hardware name: LENOVO 20KGS23S0P/20KGS23S0P, BIOS N23ET55W (1.30 ) 08/31/2018 [ 440.225300] Workqueue: phy0 ieee80211_ba_session_work [mac80211] [ 440.225301] Call Trace: [ 440.225304] dump_stack+0x85/0xc0 [ 440.225306] print_circular_bug.isra.38.cold.58+0x15c/0x195 [ 440.225307] check_prev_add.constprop.48+0x5f0/0xc00 [ 440.225309] ? check_prev_add.constprop.48+0x39d/0xc00 [ 440.225311] ? __lock_acquire+0x41d/0x1100 [ 440.225312] __lock_acquire+0xd98/0x1100 [ 440.225313] ? __lock_acquire+0x41d/0x1100 [ 440.225315] lock_acquire+0xb9/0x1a0 [ 440.225317] ? mt76_wake_tx_queue+0x4c/0xb0 [mt76] [ 440.225319] _raw_spin_lock_bh+0x34/0x40 [ 440.225321] ? mt76_wake_tx_queue+0x4c/0xb0 [mt76] [ 440.225323] mt76_wake_tx_queue+0x4c/0xb0 [mt76] [ 440.225334] ieee80211_agg_start_txq+0xe8/0x2b0 [mac80211] [ 440.225344] ieee80211_stop_tx_ba_cb+0xb8/0x1f0 [mac80211] [ 440.225354] ieee80211_ba_session_work+0x1c1/0x2f0 [mac80211] [ 440.225356] process_one_work+0x237/0x5d0 [ 440.225358] worker_thread+0x3c/0x390 [ 440.225359] ? wq_calc_node_cpumask+0x70/0x70 [ 440.225360] kthread+0x11d/0x140 [ 440.225362] ? kthread_create_on_node+0x40/0x40 [ 440.225363] ret_from_fork+0x3a/0x50 Cc: stable@vger.kernel.org Fixes: 88046b2c ("mt76: add support for reporting tx status with skb") Signed-off-by:Stanislaw Gruszka <sgruszka@redhat.com> Acked-by:
Felix Fietkau <nbd@nbd.name> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org>
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Vijayakumar Durai authored
Currently rt2x00 devices retransmit the management frames with incremented sequence number if hardware is assigning the sequence. This is HW bug fixed already for non-QOS data frames, but it should be fixed for management frames except beacon. Without fix retransmitted frames have wrong SN: AlphaNet_e8:fb:36 Vivotek_52:31:51 Authentication, SN=1648, FN=0, Flags=........C Frame is not being retransmitted 1648 1 AlphaNet_e8:fb:36 Vivotek_52:31:51 Authentication, SN=1649, FN=0, Flags=....R...C Frame is being retransmitted 1649 1 AlphaNet_e8:fb:36 Vivotek_52:31:51 Authentication, SN=1650, FN=0, Flags=....R...C Frame is being retransmitted 1650 1 With the fix SN stays correctly the same: 88:6a:e3:e8:f9:a2 8c:f5:a3:88:76:87 Authentication, SN=1450, FN=0, Flags=........C 88:6a:e3:e8:f9:a2 8c:f5:a3:88:76:87 Authentication, SN=1450, FN=0, Flags=....R...C 88:6a:e3:e8:f9:a2 8c:f5:a3:88:76:87 Authentication, SN=1450, FN=0, Flags=....R...C Cc: stable@vger.kernel.org Signed-off-by:
Vijayakumar Durai <vijayakumar.durai1@vivint.com> [sgruszka: simplify code, change comments and changelog] Signed-off-by:
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Felix Fietkau authored
Now that the sequence number allocation is fixed, we can finally send a BAR at powersave wakeup time to refresh the receiver side reorder window Signed-off-by:
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Felix Fietkau authored
If the MT_TXD3_SN_VALID flag is not set in the tx descriptor, the hardware assigns the sequence number. However, the rest of the code assumes that the sequence number specified in the 802.11 header gets transmitted. This was causing issues with the aggregation setup, which worked for the initial one (where the sequence numbers were still close), but not for further teardown/re-establishing of sessions. Additionally, the overwrite of the TID sequence number in WTBL2 was resetting the hardware assigned sequence numbers, causing them to drift further apart. Fix this by using the software assigned sequence numbers Signed-off-by:
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