- Jun 11, 2017
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Jia-Ju Bai authored
The kernel may sleep under a rcu read lock in tipc_msg_reverse, and the function call path is: tipc_l2_rcv_msg (acquire the lock by rcu_read_lock) tipc_rcv tipc_sk_rcv tipc_msg_reverse pskb_expand_head(GFP_KERNEL) --> may sleep tipc_node_broadcast tipc_node_xmit_skb tipc_node_xmit tipc_sk_rcv tipc_msg_reverse pskb_expand_head(GFP_KERNEL) --> may sleep To fix it, "GFP_KERNEL" is replaced with "GFP_ATOMIC". Signed-off-by:
Jia-Ju Bai <baijiaju1990@163.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jia-Ju Bai authored
The kernel may sleep under a rcu read lock in cfpkt_create_pfx, and the function call path is: cfcnfg_linkup_rsp (acquire the lock by rcu_read_lock) cfctrl_linkdown_req cfpkt_create cfpkt_create_pfx alloc_skb(GFP_KERNEL) --> may sleep cfserl_receive (acquire the lock by rcu_read_lock) cfpkt_split cfpkt_create_pfx alloc_skb(GFP_KERNEL) --> may sleep There is "in_interrupt" in cfpkt_create_pfx to decide use "GFP_KERNEL" or "GFP_ATOMIC". In this situation, "GFP_KERNEL" is used because the function is called under a rcu read lock, instead in interrupt. To fix it, only "GFP_ATOMIC" is used in cfpkt_create_pfx. Signed-off-by:
Jia-Ju Bai <baijiaju1990@163.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
This reverts commit bf292f1b . It belongs in 'net-next' not 'net'. Signed-off-by:
David S. Miller <davem@davemloft.net>
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Xin Long authored
Now sctp holds read_lock when foreach sctp_ep_hashtable without disabling BH. If CPU schedules to another thread A at this moment, the thread A may be trying to hold the write_lock with disabling BH. As BH is disabled and CPU cannot schedule back to the thread holding the read_lock, while the thread A keeps waiting for the read_lock. A dead lock would be triggered by this. This patch is to fix this dead lock by calling read_lock_bh instead to disable BH when holding the read_lock in sctp_for_each_endpoint. Fixes: 626d16f5 ("sctp: export some apis or variables for sctp_diag and reuse some for proc") Reported-by:
Xiumei Mu <xmu@redhat.com> Signed-off-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Fabio Estevam authored
Commit 2b30842b ("net: fec: Clear and enable MIB counters on imx51") introduced fec_enet_clear_ethtool_stats(), but missed to add a stub for the CONFIG_M5272=y case, causing build failure for the m5272c3_defconfig. Add the missing empty stub to fix the build failure. Reported-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:
Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Dominik Heidler authored
This fixes a counter problem on 32bit systems: When the rx_bytes counter reached 2 GiB, it jumpd to (2^64 Bytes - 2GiB) Bytes. rtnl_link_stats64 has __u64 type and atomic_long_read returns atomic_long_t which is signed. Due to the conversation we get an incorrect value on 32bit systems if the MSB of the atomic_long_t value is set. CC: Tom Parkin <tparkin@katalix.com> Fixes: 7b7c0719 ("l2tp: avoid deadlock in l2tp stats update") Signed-off-by:
Dominik Heidler <dheidler@suse.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Philippe Reynes authored
This function is not defined, so no need to declare it. As I don't have the hardware, I'd be very pleased if someone may test this patch. Signed-off-by:
Philippe Reynes <tremyfr@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Yuval Mintz says: ==================== bnx2x: Fix malicious VFs indication It was discovered that for a VF there's a simple [yet uncommon] scenario which would cause device firmware to declare that VF as malicious - Add a vlan interface on top of a VF and disable txvlan offloading for that VF [causing VF to transmit packets where vlan is on payload]. Patch #1 corrects driver transmission to prevent this issue. Patch #2 is a by-product correcting PF behavior once a VF is declared malicious. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mintz, Yuval authored
Once firmware indicates that a given VF is malicious and until that VF passes an FLR all bets are off - PF can't know anything is happening to the VF [since VF can't communicate anything to its PF]. But PF is currently still periodically asking device to collect statistics for the VF which might in turn fill logs by IOMMU blocking memory access done by the VF's PCI function [in the case VF has unmapped its buffers]. Signed-off-by:
Yuval Mintz <Yuval.Mintz@cavium.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mintz, Yuval authored
VF clients are configured as enforced, meaning firmware is validating the correctness of their ethertype/vid during transmission. Once txvlan is disabled, VF would start getting SKBs for transmission here vlan is on the payload - but it'll pass the packet's ethertype instead of the vid, leading to firmware declaring it as malicious. Signed-off-by:
Yuval Mintz <Yuval.Mintz@cavium.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- Jun 10, 2017
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David S. Miller authored
Merge tag 'linux-can-fixes-for-4.12-20170609' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can Marc Kleine-Budde says: ==================== pull-request: can 2017-06-09 this is a pull request of 6 patches for net/master. There's a patch by Stephane Grosjean that fixes an uninitialized symbol warning in the peak_canfd driver. A patch by Johan Hovold to fix the product-id endianness in an error message in the the peak_usb driver. A patch by Oliver Hartkopp to enable CAN FD for virtual CAN devices by default. Three patches by me, one makes the helper function can_change_state() robust to be called with cf == NULL. The next patch fixes a memory leak in the gs_usb driver. And the last one fixes a lockdep splat by properly initialize the per-net can_rcvlists_lock spin_lock. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Johannes Berg authored
The change to remove free_netdev() from ieee80211_if_free() erroneously didn't add the necessary free_netdev() for when ieee80211_if_free() is called directly in one place, rather than as the priv_destructor. Add the missing call. Fixes: cf124db5 ("net: Fix inconsistent teardown and release of private netdev state.") Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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ashwanth@codeaurora.org authored
IPI's from the victim cpu are not handled in dev_cpu_callback. So these pending IPI's would be sent to the remote cpu only when NET_RX is scheduled on the victim cpu and since this trigger is unpredictable it would result in packet latencies on the remote cpu. This patch add support to send the pending ipi's of victim cpu. Signed-off-by:
Ashwanth Goli <ashwanth@codeaurora.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mario Molitor authored
1.) Bugfix of function stmmac_get_tx_hwtstamp. Corrected the tx timestamp available check (same as 4.8 and older) Change printout from info syslevel to debug. 2.) Bugfix of function stmmac_get_rx_hwtstamp. Corrected the rx timestamp available check (same as 4.8 and older) Change printout from info syslevel to debug. Fixes: ba1ffd74 ("stmmac: fix PTP support for GMAC4") Signed-off-by:
Mario Molitor <mario_molitor@web.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mario Molitor authored
According the CYCLON V documention only the bit 16 of snaptypesel should set. (more information see Table 17-20 (cv_5v4.pdf) : Timestamp Snapshot Dependency on Register Bits) Fixes: d2042052 ("stmmac: update the PTP header file") Signed-off-by:
Mario Molitor <mario_molitor@web.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Krister Johansen authored
It looks like this: Message from syslogd@flamingo at Apr 26 00:45:00 ... kernel:unregister_netdevice: waiting for lo to become free. Usage count = 4 They seem to coincide with net namespace teardown. The message is emitted by netdev_wait_allrefs(). Forced a kdump in netdev_run_todo, but found that the refcount on the lo device was already 0 at the time we got to the panic. Used bcc to check the blocking in netdev_run_todo. The only places where we're off cpu there are in the rcu_barrier() and msleep() calls. That behavior is expected. The msleep time coincides with the amount of time we spend waiting for the refcount to reach zero; the rcu_barrier() wait times are not excessive. After looking through the list of callbacks that the netdevice notifiers invoke in this path, it appears that the dst_dev_event is the most interesting. The dst_ifdown path places a hold on the loopback_dev as part of releasing the dev associated with the original dst cache entry. Most of our notifier callbacks are straight-forward, but this one a) looks complex, and b) places a hold on the network interface in question. I constructed a new bcc script that watches various events in the liftime of a dst cache entry. Note that dst_ifdown will take a hold on the loopback device until the invalidated dst entry gets freed. [ __dst_free] on DST: ffff883ccabb7900 IF tap1008300eth0 invoked at 1282115677036183 __dst_free rcu_nocb_kthread kthread ret_from_fork Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- Jun 09, 2017
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Mateusz Jurczyk authored
Verify that the caller-provided sockaddr structure is large enough to contain the sa_family field, before accessing it in bind() and connect() handlers of the AF_UNIX socket. Since neither syscall enforces a minimum size of the corresponding memory region, very short sockaddrs (zero or one byte long) result in operating on uninitialized memory while referencing .sa_family. Signed-off-by:
Mateusz Jurczyk <mjurczyk@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Joe Perches authored
Fixes: 0d7e2d21 ("IB/ipoib: add get_link_ksettings in ethtool") Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Oliver Hartkopp authored
CAN FD capable CAN interfaces can handle (classic) CAN 2.0 frames too. New users usually fail at their first attempt to explore CAN FD on virtual CAN interfaces due to the current CAN_MTU default. Set the MTU to CANFD_MTU by default to reduce this confusion. If someone *really* needs a 'classic CAN'-only device this can be set with the 'ip' tool with e.g. 'ip link set vcan0 mtu 16' as before. Signed-off-by:
Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Marc Kleine-Budde authored
This patch uses spin_lock_init() instead of __SPIN_LOCK_UNLOCKED() to initialize the per namespace net->can.can_rcvlists_lock lock to fix this lockdep warning: | INFO: trying to register non-static key. | the code is fine but needs lockdep annotation. | turning off the locking correctness validator. | CPU: 0 PID: 186 Comm: candump Not tainted 4.12.0-rc3+ #47 | Hardware name: Marvell Kirkwood (Flattened Device Tree) | [<c0016644>] (unwind_backtrace) from [<c00139a8>] (show_stack+0x18/0x1c) | [<c00139a8>] (show_stack) from [<c0058c8c>] (register_lock_class+0x1e4/0x55c) | [<c0058c8c>] (register_lock_class) from [<c005bdfc>] (__lock_acquire+0x148/0x1990) | [<c005bdfc>] (__lock_acquire) from [<c005deec>] (lock_acquire+0x174/0x210) | [<c005deec>] (lock_acquire) from [<c04a6780>] (_raw_spin_lock+0x50/0x88) | [<c04a6780>] (_raw_spin_lock) from [<bf02116c>] (can_rx_register+0x94/0x15c [can]) | [<bf02116c>] (can_rx_register [can]) from [<bf02a868>] (raw_enable_filters+0x60/0xc0 [can_raw]) | [<bf02a868>] (raw_enable_filters [can_raw]) from [<bf02ac14>] (raw_enable_allfilters+0x2c/0xa0 [can_raw]) | [<bf02ac14>] (raw_enable_allfilters [can_raw]) from [<bf02ad38>] (raw_bind+0xb0/0x250 [can_raw]) | [<bf02ad38>] (raw_bind [can_raw]) from [<c03b5fb8>] (SyS_bind+0x70/0xac) | [<c03b5fb8>] (SyS_bind) from [<c000f8c0>] (ret_fast_syscall+0x0/0x1c) Cc: Mario Kicherer <dev@kicherer.org> Acked-by:
Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Marc Kleine-Budde authored
This patch adds the missing kfree() in gs_cmd_reset() to free the memory that is not used anymore after usb_control_msg(). Cc: linux-stable <stable@vger.kernel.org> Cc: Maximilian Schneider <max@schneidersoft.net> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Johan Hovold authored
Make sure to use the USB device product-id stored in host-byte order in a probe error message. Also remove a redundant reassignment of the local usb_dev variable which had already been used to retrieve the product id. Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Stephane Grosjean authored
This patch fixes two uninitialized symbol warnings in the new code adding support of the PEAK-System PCAN-PCI Express FD boards, in the socket-CAN network protocol family. Signed-off-by:
Stephane Grosjean <s.grosjean@peak-system.com> Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Marc Kleine-Budde authored
In OOM situations where no skb can be allocated, can_change_state() may be called with cf == NULL. As this function updates the state and error statistics it's not an option to skip the call to can_change_state() in OOM situations. This patch makes can_change_state() robust, so that it can be called with cf == NULL. Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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David Ahern authored
Commit 1aa6c4f6 ("net: vrf: Add l3mdev rules on first device create") adds the l3mdev FIB rule the first time a VRF device is created. However, it only creates the rule once and only in the namespace the first device is created - which may not be init_net. Fix by using the net_generic capability to make the add_fib_rules flag per network namespace. Fixes: 1aa6c4f6 ("net: vrf: Add l3mdev rules on first device create") Reported-by:
Petr Machata <petrm@mellanox.com> Signed-off-by:
David Ahern <dsahern@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
I noticed that test_l4lb was failing in selftests: # ./test_progs test_pkt_access:PASS:ipv4 77 nsec test_pkt_access:PASS:ipv6 44 nsec test_xdp:PASS:ipv4 2933 nsec test_xdp:PASS:ipv6 1500 nsec test_l4lb:PASS:ipv4 377 nsec test_l4lb:PASS:ipv6 544 nsec test_l4lb:FAIL:stats 6297600000 200000 test_tcp_estats:PASS: 0 nsec Summary: 7 PASSED, 1 FAILED Tracking down the issue actually revealed that endianness selection in bpf_endian.h is broken when compiled with clang with bpf target. test_pkt_access.c, test_l4lb.c is compiled with __BYTE_ORDER as __BIG_ENDIAN, test_xdp.c as __LITTLE_ENDIAN! test_l4lb noticeably fails, because the test accounts bytes via bpf_ntohs(ip6h->payload_len) and bpf_ntohs(iph->tot_len), and compares them against a defined value and given a wrong endianness, the test outcome is different, of course. Turns out that there are actually two bugs: i) when we do __BYTE_ORDER comparison with __LITTLE_ENDIAN/__BIG_ENDIAN, then depending on the include order we see different outcomes. Reason is that __BYTE_ORDER is undefined due to missing endian.h include. Before we include the asm/byteorder.h (e.g. through linux/in.h), then __BYTE_ORDER equals __LITTLE_ENDIAN since both are undefined, after the include which correctly pulls in linux/byteorder/little_endian.h, __LITTLE_ENDIAN is defined, but given __BYTE_ORDER is still undefined, we match on __BYTE_ORDER equals to __BIG_ENDIAN since __BIG_ENDIAN is also undefined at that point, sigh. ii) But even that would be wrong, since when compiling the test cases with clang, one can select between bpfeb and bpfel targets for cross compilation. Hence, we can also not rely on what the system's endian.h provides, but we need to look at the compiler's defined endianness. The compiler defines __BYTE_ORDER__, and we can match __ORDER_LITTLE_ENDIAN__ and __ORDER_BIG_ENDIAN__, which also reflects targets bpf (native), bpfel, bpfeb correctly, thus really only rely on that. After patch: # ./test_progs test_pkt_access:PASS:ipv4 74 nsec test_pkt_access:PASS:ipv6 42 nsec test_xdp:PASS:ipv4 2340 nsec test_xdp:PASS:ipv6 1461 nsec test_l4lb:PASS:ipv4 400 nsec test_l4lb:PASS:ipv6 530 nsec test_tcp_estats:PASS: 0 nsec Summary: 7 PASSED, 0 FAILED Fixes: 43bcf707 ("bpf: fix _htons occurences in test_progs") Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Nicolas Dichtel authored
Each time a new speed is added, the bonding 802.3ad isn't updated. Add a comment to remind the developer to update this driver. Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by:
Andy Gospodarek <andy@greyhouse.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Nicolas Dichtel authored
This patch adds 14 Gbps enum definition, and fixes aggregated bandwidth calculation based on above slave links. Fixes: 0d7e2d21 ("IB/ipoib: add get_link_ksettings in ethtool") Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by:
Andy Gospodarek <andy@greyhouse.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Thibaut Collet authored
This patch adds [5|50] Gbps enum definition, and fixes aggregated bandwidth calculation based on above slave links. Fixes: c9a70d43 ("net-next: ethtool: Added port speed macros.") Signed-off-by:
Thibaut Collet <thibaut.collet@6wind.com> Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by:
Andy Gospodarek <andy@greyhouse.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Nicolas Dichtel authored
The first netlink attribute (value 0) must always be defined as none/unspec. Because we cannot change an existing UAPI, I add a comment to point the mistake and avoid to propagate it in a new ovs API in the future. Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Arnd Bergmann authored
While discussing the possible merits of clang warning about unused initialized functions, I found one function that was clearly meant to be called but never actually is. __ila_hash_secret_init() initializes the hash value for the ila locator, apparently this is intended to prevent hash collision attacks, but this ends up being a read-only zero constant since there is no caller. I could find no indication of why it was never called, the earliest patch submission for the module already was like this. If my interpretation is right, we certainly want to backport the patch to stable kernels as well. I considered adding it to the ila_xlat_init callback, but for best effect the random data is read as late as possible, just before it is first used. The underlying net_get_random_once() is already highly optimized to avoid overhead when called frequently. Fixes: 7f00feaf ("ila: Add generic ILA translation facility") Cc: stable@vger.kernel.org Link: https://www.spinics.net/lists/kernel/msg2527243.html Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- Jun 08, 2017
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David S. Miller authored
drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c: In function ‘rtw_cfg80211_add_monitor_if’: drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2670:10: error: ‘struct net_device’ has no member named ‘destructor’ mon_ndev->destructor = rtw_ndev_destructor; ^ Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Stephen Hemminger says: ==================== netvsc: bug fixes These are bugfixes for netvsc driver in 4.12. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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stephen hemminger authored
The work queue and handling of network filter parameters should be in rndis_device. This gets rid of warning from RCU checks, eliminates a race and cleans up code. Signed-off-by:
Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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stephen hemminger authored
The ndo_poll_controller function needs to schedule NAPI to pick up arriving packets and send completions. Otherwise no data will ever be received. For simple case of netconsole, it also will allow send completions to happen. Without this netpoll will eventually get stuck. Signed-off-by:
Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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stephen hemminger authored
The ethtool info command calls the netvsc get_sset_count with RTNL but not with RCU. Which causes warning: drivers/net/hyperv/netvsc_drv.c:1010 suspicious rcu_dereference_check() usage! Signed-off-by:
Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David Ahern authored
Roopa reported attempts to delete a bond device that is referenced in a multipath route is hanging: $ ifdown bond2 # ifupdown2 command that deletes virtual devices unregister_netdevice: waiting for bond2 to become free. Usage count = 2 Steps to reproduce: echo 1 > /proc/sys/net/ipv6/conf/all/ignore_routes_with_linkdown ip link add dev bond12 type bond ip link add dev bond13 type bond ip addr add 2001:db8:2::0/64 dev bond12 ip addr add 2001:db8:3::0/64 dev bond13 ip route add 2001:db8:33::0/64 nexthop via 2001:db8:2::2 nexthop via 2001:db8:3::2 ip link del dev bond12 ip link del dev bond13 The root cause is the recent change to keep routes on a linkdown. Update the check to detect when the device is unregistering and release the route for that case. Fixes: a1a22c12 ("net: ipv6: Keep nexthop of multipath route on admin down") Reported-by:
Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by:
David Ahern <dsahern@gmail.com> Acked-by:
Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mintz, Yuval authored
Some of the structure's fields are not initialized by the rtnetlink. If driver doesn't set those in ndo_get_vf_config(), they'd leak memory to user. Signed-off-by:
Yuval Mintz <Yuval.Mintz@cavium.com> CC: Michal Schmidt <mschmidt@redhat.com> Reviewed-by:
Greg Rose <gvrose8192@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mateusz Jurczyk authored
Verify that the length of the socket buffer is sufficient to cover the nlmsghdr structure before accessing the nlh->nlmsg_len field for further input sanitization. If the client only supplies 1-3 bytes of data in sk_buff, then nlh->nlmsg_len remains partially uninitialized and contains leftover memory from the corresponding kernel allocation. Operating on such data may result in indeterminate evaluation of the nlmsg_len < sizeof(*nlh) expression. The bug was discovered by a runtime instrumentation designed to detect use of uninitialized memory in the kernel. The patch prevents this and other similar tools (e.g. KMSAN) from flagging this behavior in the future. Signed-off-by:
Mateusz Jurczyk <mjurczyk@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
This reverts commit 85eac2ba . There is an updated version of this fix which we should use instead. Signed-off-by:
David S. Miller <davem@davemloft.net>
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