- 06 Nov, 2019 1 commit
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git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller authored
Daniel Borkmann says: ==================== pull-request: bpf 2019-11-02 The following pull-request contains BPF updates for your *net* tree. We've added 6 non-merge commits during the last 6 day(s) which contain a total of 8 files changed, 35 insertions(+), 9 deletions(-). The main changes are: 1) Fix ppc BPF JIT's tail call implementation by performing a second pass to gather a stable JIT context before opcode emission, from Eric Dumazet. 2) Fix build of BPF samples sys_perf_event_open() usage to compiled out unavailable test_attr__{enabled,open} checks. Also fix potential overflows in bpf_map_{area_alloc,charge_init} on 32 bit archs, from Björn Töpel. 3) Fix narrow loads of bpf_sysctl context fields with offset > 0 on big endian archs like s390x and also improve the test coverage, from Ilya Leoshkevich. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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- 05 Nov, 2019 4 commits
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Ivan Khoronzhuk authored
Don't swap oper and admin schedules too early, it's not correct and causes crash. Steps to reproduce: 1) tc qdisc replace dev eth0 parent root handle 100 taprio \ num_tc 3 \ map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 \ queues 1@0 1@1 1@2 \ base-time $SOME_BASE_TIME \ sched-entry S 01 80000 \ sched-entry S 02 15000 \ sched-entry S 04 40000 \ flags 2 2) tc qdisc replace dev eth0 parent root handle 100 taprio \ base-time $SOME_BASE_TIME \ sched-entry S 01 90000 \ sched-entry S 02 20000 \ sched-entry S 04 40000 \ flags 2 3) tc qdisc replace dev eth0 parent root handle 100 taprio \ base-time $SOME_BASE_TIME \ sched-entry S 01 150000 \ sched-entry S 02 200000 \ sched-entry S 04 40000 \ flags 2 Do 2 3 2 .. steps more times if not happens and observe: [ 305.832319] Unable to handle kernel write to read-only memory at virtual address ffff0000087ce7f0 [ 305.910887] CPU: 0 PID: 0 Comm: swapper/0 Not tainted [ 305.919306] Hardware name: Texas Instruments AM654 Base Board (DT) [...] [ 306.017119] x1 : ffff800848031d88 x0 : ffff800848031d80 [ 306.022422] Call trace: [ 306.024866] taprio_free_sched_cb+0x4c/0x98 [ 306.029040] rcu_process_callbacks+0x25c/0x410 [ 306.033476] __do_softirq+0x10c/0x208 [ 306.037132] irq_exit+0xb8/0xc8 [ 306.040267] __handle_domain_irq+0x64/0xb8 [ 306.044352] gic_handle_irq+0x7c/0x178 [ 306.048092] el1_irq+0xb0/0x128 [ 306.051227] arch_cpu_idle+0x10/0x18 [ 306.054795] do_idle+0x120/0x138 [ 306.058015] cpu_startup_entry+0x20/0x28 [ 306.061931] rest_init+0xcc/0xd8 [ 306.065154] start_kernel+0x3bc/0x3e4 [ 306.068810] Code: f2fbd5b7 f2fbd5b6 d503201f f9400422 (f9000662) [ 306.074900] ---[ end trace 96c8e2284a9d9d6e ]--- [ 306.079507] Kernel panic - not syncing: Fatal exception in interrupt [ 306.085847] SMP: stopping secondary CPUs [ 306.089765] Kernel Offset: disabled Try to explain one of the possible crash cases: The "real" admin list is assigned when admin_sched is set to new_admin, it happens after "swap", that assigns to oper_sched NULL. Thus if call qdisc show it can crash. Farther, next second time, when sched list is updated, the admin_sched is not NULL and becomes the oper_sched, previous oper_sched was NULL so just skipped. But then admin_sched is assigned new_admin, but schedules to free previous assigned admin_sched (that already became oper_sched). Farther, next third time, when sched list is updated, while one more swap, oper_sched is not null, but it was happy to be freed already (while prev. admin update), so while try to free oper_sched the kernel panic happens at taprio_free_sched_cb(). So, move the "swap emulation" where it should be according to function comment from code. Fixes: 9c66d156 ("taprio: Add support for hardware offloading") Signed-off-by:Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Acked-by:
Vinicius Costa Gomes <vinicius.gomes@intel.com> Tested-by:
Vladimir Oltean <olteanv@gmail.com> Signed-off-by:
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David S. Miller authored
Merge tag 'linux-can-fixes-for-5.4-20191105' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can Marc Kleine-Budde says: ==================== pull-request: can 2019-11-05 this is a pull request of 33 patches for net/master. In the first patch Wen Yang's patch adds a missing of_node_put() to CAN device infrastructure. Navid Emamdoost's patch for the gs_usb driver fixes a memory leak in the gs_can_open() error path. Johan Hovold provides two patches, one for the mcba_usb, the other for the usb_8dev driver. Both fix a use-after-free after USB-disconnect. Joakim Zhang's patch improves the flexcan driver, the ECC mechanism is now completely disabled instead of masking the interrupts. The next three patches all target the peak_usb driver. Stephane Grosjean's patch fixes a potential out-of-sync while decoding packets, Johan Hovold's patch fixes a slab info leak, Jeroen Hofstee's patch adds missing reporting of bus off recovery events. Followed by three patches for the c_can driver. Kurt Van Dijck's patch fixes detection of potential missing status IRQs, Jeroen Hofstee's patches add a chip reset on open and add missing reporting of bus off recovery events. Appana Durga Kedareswara rao's patch for the xilinx driver fixes the flags field initialization for axi CAN. The next seven patches target the rx-offload helper, they are by me and Jeroen Hofstee. The error handling in case of a queue overflow is fixed removing a memory leak. Further the error handling in case of queue overflow and skb OOM is cleaned up. The next two patches are by me and target the flexcan and ti_hecc driver. In case of a error during can_rx_offload_queue_sorted() the error counters in the drivers are incremented. Jeroen Hofstee provides 6 patches for the ti_hecc driver, which properly stop the device in ifdown, improve the rx-offload support (which hit mainline in v5.4-rc1), and add missing FIFO overflow and state change reporting. The following four patches target the j1939 protocol. Colin Ian King's patch fixes a memory leak in the j1939_sk_errqueue() handling. Three patches by Oleksij Rempel fix a memory leak on socket release and fix the EOMA packet in the transport protocol. Timo Schlüßler's patch fixes a potential race condition in the mcp251x driver on after suspend. The last patch is by Yegor Yefremov and updates the SPDX-License-Identifier to v3.0. ==================== Signed-off-by:
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Yegor Yefremov authored
The "GPL-2.0" license identifier changed to "GPL-2.0-only" in SPDX v3.0. Signed-off-by:
Yegor Yefremov <yegorslists@googlemail.com> Acked-by:
Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Timo Schlüßler authored
In mcp251x_restart_work_handler() the variable to stop the interrupt handler (priv->force_quit) is reset after the chip is restarted and thus a interrupt might occur. This patch fixes the potential race condition by resetting force_quit before enabling interrupts. Signed-off-by:
Timo Schlüßler <schluessler@krause.de> Signed-off-by:
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- 04 Nov, 2019 33 commits
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Oleksij Rempel authored
We were sending malformed EOMA with total message size set to 0. This issue has been fixed in the previous patch. In this patch a sanity check is added to the RX path and a error message is displayed. Signed-off-by:
Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by:
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Oleksij Rempel authored
can: j1939: transport: j1939_session_fresh_new(): make sure EOMA is send with the total message size set We were sending malformed EOMA messageswith total message size set to 0. This patch fixes the bug. Reported-by: https://github.com/linux-can/can-utils/issues/159Signed-off-by:
Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be> Signed-off-by:
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Oleksij Rempel authored
Filters array is coped from user space and linked to the j1939 socket. On socket release this memory was not freed. Fixes: 9d71dd0c ("can: add support of SAE J1939 protocol") Signed-off-by:
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Colin Ian King authored
Currently the error return paths do not free skb and this results in a memory leak. Fix this by freeing them before the return. Addresses-Coverity: ("Resource leak") Fixes: 9d71dd0c ("can: add support of SAE J1939 protocol") Signed-off-by:Colin Ian King <colin.king@canonical.com> Acked-by:
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Jeroen Hofstee authored
While the ti_hecc has interrupts to report when the error counters increase to a certain level and which change state it doesn't handle the case that the error counters go down again, so the reported state can actually be wrong. Since there is no interrupt for that, do update state based on the error counters, when the state is not error active and goes down again. Signed-off-by:
Jeroen Hofstee <jhofstee@victronenergy.com> Signed-off-by:
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Jeroen Hofstee authored
The HECC_CANES register handles the flags specially, it only updates the flags after a one is written to them. Since the interrupt for frame errors is not enabled an old error can hence been seen when a state interrupt arrives. For example if the device is not connected to the CAN-bus the error warning interrupt will have HECC_CANES indicating there is no ack. The error passive interrupt thereafter will have HECC_CANES flagging that there is a warning level. And if thereafter there is a message successfully send HECC_CANES points to an error passive event, while in reality it became error warning again. In summary, the state is not always reported correctly. So handle the state changes and frame errors separately. The state changes are now based on the interrupt flags and handled directly when they occur. The reporting of the frame errors is still done as before, as a side effect of another interrupt. note: the hecc_clear_bit will do a read, modify, write. So it will not only clear the bit, but also reset all other bits being set as a side affect, hence it is replaced with only clearing the flags. note: The HECC_CANMC_CCR is no longer cleared in the state change interrupt, it is completely unrelated. And use net_ratelimit to make checkpatch happy. Signed-off-by:
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Jeroen Hofstee authored
When the rx FIFO overflows the ti_hecc would silently drop them since the overwrite protection is enabled for all mailboxes. So disable it for the lowest priority mailbox and return a proper error value when receive message lost is set. Drop the message itself in that case, since it might be partially updated. Signed-off-by:
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Jeroen Hofstee authored
Release the mailbox after reading it, so it can be reused a bit earlier. Since "can: rx-offload: continue on error" all pending message bits are cleared directly, so remove clearing them in ti_hecc. Suggested-by:
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Jeroen Hofstee authored
The HECC_CANMIM is set in the xmit path and cleared in the interrupt. Since this is done with a read, modify, write action the register might end up with some more MIM enabled then intended, since it is not protected. That doesn't matter at all, since the tx interrupt disables the mailbox with HECC_CANME (while holding a spinlock). So lets just always keep MIM set. While at it, since the mailbox direction never changes, don't set it every time a message is send, ti_hecc_reset() already sets them to tx. Signed-off-by:
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Jeroen Hofstee authored
When the interface goes down, the CPK should no longer take an active part in the CAN-bus communication, like sending acks and error frames. So enable configuration mode in ti_hecc_stop, so the CPK is no longer active. When a transceiver switch is present the acks and errors don't make it to the bus, but disabling the CPK then does prevent oddities, like ti_hecc_reset() failing, since the CPK can become bus-off and starts counting the 11 bit recessive bits, which seems to block the reset. It can also cause invalid interrupts and disrupt the CAN-bus, since transmission can be stopped in the middle of a message, by disabling the tranceiver while the CPK is sending. Since the CPK is disabled after normal power on, it is typically only seen when the interface is restarted. Signed-off-by:
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Marc Kleine-Budde authored
can: ti_hecc: ti_hecc_error(): increase error counters if skb enqueueing via can_rx_offload_queue_sorted() fails The call to can_rx_offload_queue_sorted() may fail and return an error (in the current implementation due to resource shortage). The passed skb is consumed. This patch adds incrementing of the appropriate error counters to let the device statistics reflect that there's a problem. Signed-off-by: -
Marc Kleine-Budde authored
The call to can_rx_offload_queue_sorted() may fail and return an error (in the current implementation due to resource shortage). The passed skb is consumed. This patch adds incrementing of the appropriate error counters to let the device statistics reflect that there's a problem. Reported-by:
Martin Hundebøll <martin@geanix.com> Signed-off-by:
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Marc Kleine-Budde authored
In case of a resource shortage, i.e. the rx_offload queue will overflow or a skb fails to be allocated (due to OOM), can_rx_offload_offload_one() will call mailbox_read() to discard the mailbox and return an ERR_PTR. If the hardware FIFO is empty can_rx_offload_offload_one() will return NULL. In case a CAN frame was read from the hardware, can_rx_offload_offload_one() returns the skb containing it. Without this patch can_rx_offload_irq_offload_fifo() bails out if no skb returned, regardless of the reason. Similar to can_rx_offload_irq_offload_timestamp() in case of a resource shortage the whole FIFO should be discarded, to avoid an IRQ storm and give the system some time to recover. However if the FIFO is empty the loop can be left. With this patch the loop is left in case of empty FIFO, but not on errors. Signed-off-by: -
Jeroen Hofstee authored
In case of a resource shortage, i.e. the rx_offload queue will overflow or a skb fails to be allocated (due to OOM), can_rx_offload_offload_one() will call mailbox_read() to discard the mailbox and return an ERR_PTR. However can_rx_offload_irq_offload_timestamp() bails out in the error case. In case of a resource shortage all mailboxes should be discarded, to avoid an IRQ storm and give the system some time to recover. Since can_rx_offload_irq_offload_timestamp() is typically called from a while loop, all message will eventually be discarded. So let's continue on error instead to discard them directly. Signed-off-by:
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Marc Kleine-Budde authored
can: rx-offload: can_rx_offload_offload_one(): use ERR_PTR() to propagate error value in case of errors Before this patch can_rx_offload_offload_one() returns a pointer to a skb containing the read CAN frame or a NULL pointer. However the meaning of the NULL pointer is ambiguous, it can either mean the requested mailbox is empty or there was an error. This patch fixes this situation by returning: - pointer to skb on success - NULL pointer if mailbox is empty - ERR_PTR() in case of an error All users of can_rx_offload_offload_one() have been adopted, no functional change intended. Signed-off-by: -
Marc Kleine-Budde authored
If the rx-offload skb_queue is full or the skb allocation fails (due to OOM), the mailbox contents is discarded. This patch adds the incrementing of the rx_fifo_errors statistics counter. Signed-off-by: -
Marc Kleine-Budde authored
can: rx-offload: can_rx_offload_offload_one(): do not increase the skb_queue beyond skb_queue_len_max The skb_queue is a linked list, holding the skb to be processed in the next NAPI call. Without this patch, the queue length in can_rx_offload_offload_one() is limited to skb_queue_len_max + 1. As the skb_queue is a linked list, no array or other resources are accessed out-of-bound, however this behaviour is counterintuitive. This patch limits the rx-offload skb_queue length to skb_queue_len_max. Fixes: d254586c ("can: rx-offload: Add support for HW fifo based irq offloading") Signed-off-by:
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Marc Kleine-Budde authored
If the rx-offload skb_queue is full can_rx_offload_queue_tail() will not queue the skb and return with an error. This patch frees the skb in case of a full queue, which brings can_rx_offload_queue_tail() in line with the can_rx_offload_queue_sorted() function, which has been adjusted in the previous patch. The return value is adjusted to -ENOBUFS to better reflect the actual problem. The device stats handling is left to the caller. Fixes: d254586c ("can: rx-offload: Add support for HW fifo based irq offloading") Reported-by:
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Marc Kleine-Budde authored
If the rx-offload skb_queue is full can_rx_offload_queue_sorted() will not queue the skb and return with an error. None of the callers of this function, issue a kfree_skb() to free the not queued skb. This results in a memory leak. This patch fixes the problem by freeing the skb in case of a full queue. The return value is adjusted to -ENOBUFS to better reflect the actual problem. The device stats handling is left to the callers, as this function might be used in both the rx and tx path. Fixes: 55059f2b ("can: rx-offload: introduce can_rx_offload_get_echo_skb() and can_rx_offload_queue_sorted() functions") Cc: linux-stable <stable@vger.kernel.org> Cc: Martin Hundebøll <martin@geanix.com> Reported-by:
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Appana Durga Kedareswara rao authored
AXI CANIP doesn't support tx fifo empty interrupt feature(TXFEMP), update the flags filed in the driver for AXI CAN case accordingly. Fixes: 3281b380 ("can: xilinx_can: Fix flags field initialization for axi can and canps") Reported-by:
Anssi Hannula <anssi.hannula@bitwise.fi> Signed-off-by:
Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com> Signed-off-by:
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Jeroen Hofstee authored
While the state is updated when the error counters increase and decrease, there is no event when the bus recovers and the error counters decrease again. So add that event as well. Change the state going downward to be ERROR_PASSIVE -> ERROR_WARNING -> ERROR_ACTIVE instead of directly to ERROR_ACTIVE again. Signed-off-by:
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Jeroen Hofstee authored
When the CAN interface is closed it the hardwre is put in power down mode, but does not reset the error counters / state. Reset the D_CAN on open, so the reported state and the actual state match. According to [1], the C_CAN module doesn't have the software reset. [1] http://www.bosch-semiconductors.com/media/ip_modules/pdf_2/c_can_fd8/users_manual_c_can_fd8_r210_1.pdfSigned-off-by:
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Kurt Van Dijck authored
When the status register is read without the status IRQ pending, the chip may not raise the interrupt line for an upcoming status interrupt and the driver may miss a status interrupt. It is critical that the BUSOFF status interrupt is forwarded to the higher layers, since no more interrupts will follow without intervention. Thanks to Wolfgang and Joe for bringing up the first idea. Signed-off-by:
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Jeroen Hofstee authored
While the state changes are reported when the error counters increase and decrease, there is no event when the bus recovers and the error counters decrease again. So add those as well. Change the state going downward to be ERROR_PASSIVE -> ERROR_WARNING -> ERROR_ACTIVE instead of directly to ERROR_ACTIVE again. Signed-off-by:
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Johan Hovold authored
Fix a small slab info leak due to a failure to clear the command buffer at allocation. The first 16 bytes of the command buffer are always sent to the device in pcan_usb_send_cmd() even though only the first two may have been initialised in case no argument payload is provided (e.g. when waiting for a response). Fixes: bb478555 ("can: usb: PEAK-System Technik USB adapters driver core") Cc: stable <stable@vger.kernel.org> # 3.4 Reported-by: syzbot+863724e7128e14b26732@syzkaller.appspotmail.com Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Stephane Grosjean authored
When decoding a buffer received from PCAN-USB, the first timestamp read in a packet is a 16-bit coded time base, and the next ones are an 8-bit offset to this base, regardless of the type of packet read. This patch corrects a potential loss of synchronization by using a timestamp index read from the buffer, rather than an index of received data packets, to determine on the sizeof the timestamp to be read from the packet being decoded. Signed-off-by:
Stephane Grosjean <s.grosjean@peak-system.com> Fixes: 46be265d ("can: usb: PEAK-System Technik PCAN-USB specific part") Cc: linux-stable <stable@vger.kernel.org> Signed-off-by:
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Joakim Zhang authored
The ECC (memory error detection and correction) mechanism can be activated or not, controlled by the ECCDIS bit in CAN_MECR. When disabled, updates on indications and reporting registers are stopped. So if want to disable ECC completely, had better assert ECCDIS bit, not just mask the related interrupts. Fixes: cdce8448 ("can: flexcan: add vf610 support for FlexCAN") Signed-off-by:
Joakim Zhang <qiangqing.zhang@nxp.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
The driver was accessing its driver data after having freed it. Fixes: 0024d8ad ("can: usb_8dev: Add support for USB2CAN interface from 8 devices") Cc: stable <stable@vger.kernel.org> # 3.9 Cc: Bernd Krumboeck <b.krumboeck@gmail.com> Cc: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by:
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Johan Hovold authored
The driver was accessing its driver data after having freed it. Fixes: 51f3baad ("can: mcba_usb: Add support for Microchip CAN BUS Analyzer") Cc: stable <stable@vger.kernel.org> # 4.12 Cc: Remigiusz Kołłątaj <remigiusz.kollataj@mobica.com> Reported-by: syzbot+e29b17e5042bbc56fae9@syzkaller.appspotmail.com Signed-off-by:
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Navid Emamdoost authored
In gs_can_open() if usb_submit_urb() fails the allocated urb should be released. Fixes: d08e973a ("can: gs_usb: Added support for the GS_USB CAN devices") Cc: linux-stable <stable@vger.kernel.org> Signed-off-by:
Navid Emamdoost <navid.emamdoost@gmail.com> Signed-off-by:
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Wen Yang authored
of_node_put() needs to be called when the device node which is got from of_get_child_by_name() finished using. Fixes: 2290aefa ("can: dev: Add support for limiting configured bitrate") Cc: Franklin S Cooper Jr <fcooper@ti.com> Signed-off-by:
Wen Yang <wenyang@linux.alibaba.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by:
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Eric Dumazet authored
For some reason I missed the case of DCCP passive flows in my previous patch. Fixes: a904a069 ("inet: stop leaking jiffies on the wire") Signed-off-by:
Eric Dumazet <edumazet@google.com> Reported-by:
Thiemo Nagel <tnagel@google.com> Signed-off-by:
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Chuhong Yuan authored
This driver forgets to disable and unprepare clks when remove. Add calls to clk_disable_unprepare to fix it. Signed-off-by:
Chuhong Yuan <hslester96@gmail.com> Signed-off-by:
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- 02 Nov, 2019 2 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Fix free/alloc races in batmanadv, from Sven Eckelmann. 2) Several leaks and other fixes in kTLS support of mlx5 driver, from Tariq Toukan. 3) BPF devmap_hash cost calculation can overflow on 32-bit, from Toke Høiland-Jørgensen. 4) Add an r8152 device ID, from Kazutoshi Noguchi. 5) Missing include in ipv6's addrconf.c, from Ben Dooks. 6) Use siphash in flow dissector, from Eric Dumazet. Attackers can easily infer the 32-bit secret otherwise etc. 7) Several netdevice nesting depth fixes from Taehee Yoo. 8) Fix several KCSAN reported errors, from Eric Dumazet. For example, when doing lockless skb_queue_empty() checks, and accessing sk_napi_id/sk_incoming_cpu lockless as well. 9) Fix jumbo packet handling in RXRPC, from David Howells. 10) Bump SOMAXCONN and tcp_max_syn_backlog values, from Eric Dumazet. 11) Fix DMA synchronization in gve driver, from Yangchun Fu. 12) Several bpf offload fixes, from Jakub Kicinski. 13) Fix sk_page_frag() recursion during memory reclaim, from Tejun Heo. 14) Fix ping latency during high traffic rates in hisilicon driver, from Jiangfent Xiao. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (146 commits) net: fix installing orphaned programs net: cls_bpf: fix NULL deref on offload filter removal selftests: bpf: Skip write only files in debugfs selftests: net: reuseport_dualstack: fix uninitalized parameter r8169: fix wrong PHY ID issue with RTL8168dp net: dsa: bcm_sf2: Fix IMP setup for port different than 8 net: phylink: Fix phylink_dbg() macro gve: Fixes DMA synchronization. inet: stop leaking jiffies on the wire ixgbe: Remove duplicate clear_bit() call Documentation: networking: device drivers: Remove stray asterisks e1000: fix memory leaks i40e: Fix receive buffer starvation for AF_XDP igb: Fix constant media auto sense switching when no cable is connected net: ethernet: arc: add the missed clk_disable_unprepare igb: Enable media autosense for the i350. igb/igc: Don't warn on fatal read failures when the device is removed tcp: increase tcp_max_syn_backlog max value net: increase SOMAXCONN to 4096 netdevsim: Fix use-after-free during device dismantle ... -
git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds authored
Pull NFS client bugfixes from Anna Schumaker: "This contains two delegation fixes (with the RCU lock leak fix marked for stable), and three patches to fix destroying the the sunrpc back channel. Stable bugfixes: - Fix an RCU lock leak in nfs4_refresh_delegation_stateid() Other fixes: - The TCP back channel mustn't disappear while requests are outstanding - The RDMA back channel mustn't disappear while requests are outstanding - Destroy the back channel when we destroy the host transport - Don't allow a cached open with a revoked delegation" * tag 'nfs-for-5.4-3' of git://git.linux-nfs.org/projects/anna/linux-nfs: NFS: Fix an RCU lock leak in nfs4_refresh_delegation_stateid() NFSv4: Don't allow a cached open with a revoked delegation SUNRPC: Destroy the back channel when we destroy the host transport SUNRPC: The RDMA back channel mustn't disappear while requests are outstanding SUNRPC: The TCP back channel mustn't disappear while requests are outstanding
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