- 23 Feb, 2017 40 commits
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Sebastian Andrzej Siewior authored
commit 8ae94224 upstream. Debian started to build the gcc with -fPIE by default so the kernel build ends before it starts properly with: |kernel/bounds.c:1:0: error: code model kernel does not support PIC mode Also add to KBUILD_AFLAGS due to: |gcc -Wp,-MD,arch/x86/entry/vdso/vdso32/.note.o.d … -mfentry -DCC_USING_FENTRY … vdso/vdso32/note.S |arch/x86/entry/vdso/vdso32/note.S:1:0: sorry, unimplemented: -mfentry isn’t supported for 32-bit in combination with -fpic Tagging it stable so it is possible to compile recent stable kernels as well. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Michal Marek <mmarek@suse.com> [bwh: Backported to 3.16: adjust context] Signed-off-by:
Ben Hutchings <ben@decadent.org.uk>
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Johan Hovold authored
commit c7262aaa upstream. Make sure to drop the references taken by of_get_child_by_name() and bus_find_device() before returning from cpsw_phy_sel(). Note that holding a reference to the cpsw-phy-sel device does not prevent the devres-managed private data from going away. Fixes: 5892cd13 ("drivers: net: cpsw-phy-sel: Add new driver...") Cc: Mugunthan V N <mugunthanvnm@ti.com> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Cc: linux-omap@vger.kernel.org Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Fabio Estevam authored
commit f91346e8 upstream. An interrupt may occur right after devm_request_irq() is called and prior to the spinlock initialization, leading to a kernel oops, as the interrupt handler uses the spinlock. In order to prevent this problem, move the spinlock initialization prior to requesting the interrupts. Fixes: e4243f13 (mmc: mxs-mmc: add mmc host driver for i.MX23/28) Signed-off-by:
Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by:
Marek Vasut <marex@denx.de> Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> [bwh: Backported to 3.16 adjust context] Signed-off-by:
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Marc Dietrich authored
commit 68fae2f3 upstream. This basicly reverts commit e534f3e9 (staging:nvec: Introduce the use of the managed version of kzalloc). Serio struct should never by managed because it is refcounted. Doing so will lead to a double free oops on module remove. Signed-off-by:
Marc Dietrich <marvin24@gmx.de> Fixes: e534f3e9 ("staging:nvec: Introduce the use of the managed version of kzalloc") Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> [bwh: Backported to 3.16: adjust context] Signed-off-by:
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Paul Fertser authored
commit 17c1c9ba upstream. This reverts commit 36b30d61. This is necessary to detect paz00 (ac100) touchpad properly as one speaking ETPS/2 protocol. Without it X.org's synaptics driver doesn't work as the touchpad is detected as an ImPS/2 mouse instead. Commit ec6184b1 changed the way auto-detection is performed on ports marked as pass through and made the issue apparent. A pass through port is an additional PS/2 port used to connect a slave device to a master device that is using PS/2 to communicate with the host (so slave's PS/2 communication is tunneled over master's PS/2 link). "Synaptics PS/2 TouchPad Interfacing Guide" describes such a setup (PS/2 PASS-THROUGH OPTION section). Since paz00's embedded controller is not connected to a PS/2 port itself, the PS/2 interface it exposes is not a pass-through one. Signed-off-by:
Paul Fertser <fercerpav@gmail.com> Acked-by:
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Paul Fertser authored
commit d8f8a74d upstream. This command was sent behind serio's back and the answer to it was confusing atkbd probe function which lead to the elantech touchpad getting detected as a keyboard. To prevent this from happening just let every party do its part of the job. Signed-off-by:
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Doug Brown authored
commit 9bfef729 upstream. This patch adds support for the TI CC3200 LaunchPad board, which uses a custom USB vendor ID and product ID. Channel A is used for JTAG, and channel B is used for a UART. Signed-off-by:
Doug Brown <doug@schmorgal.com> Signed-off-by:
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Song Hongyan authored
commit 6f77199e upstream. While testing, it was observed that on some platforms the scale value from iio sysfs for gyroscope is always 0 (E.g. Yoga 260). This results in the final angular velocity component values to be zeros. This is caused by insufficient precision of scale value displayed in sysfs. If the precision is changed to nano from current micro, then this is sufficient to display the scale value on this platform. Since this can be a problem for all other HID sensors, increase scale precision of all HID sensors to nano from current micro. Results on Yoga 260: name scale before scale now -------------------------------------------- gyro_3d 0.000000 0.000000174 als 0.001000 0.001000000 magn_3d 0.000001 0.000001000 accel_3d 0.000009 0.000009806 Signed-off-by:
Song Hongyan <hongyan.song@intel.com> Acked-by:
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by:
Jonathan Cameron <jic23@kernel.org> Signed-off-by:
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Sachin Kamat authored
commit a0342342 upstream. Move the 'static' keyword to beginning of definition to silence the following compilation warning: drivers/iio/common/hid-sensors/hid-sensor-attributes.c:34:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration] Signed-off-by:
Sachin Kamat <sachin.kamat@samsung.com> Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by:
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Vladimir Zapolskiy authored
commit 147b36d5 upstream. Race condition between registering an I2C device driver and deregistering an I2C adapter device which is assumed to manage that I2C device may lead to a NULL pointer dereference due to the uninitialized list head of driver clients. The root cause of the issue is that the I2C bus may know about the registered device driver and thus it is matched by bus_for_each_drv(), but the list of clients is not initialized and commonly it is NULL, because I2C device drivers define struct i2c_driver as static and clients field is expected to be initialized by I2C core: i2c_register_driver() i2c_del_adapter() driver_register() ... bus_add_driver() ... ... bus_for_each_drv(..., __process_removed_adapter) ... i2c_do_del_adapter() ... list_for_each_entry_safe(..., &driver->clients, ...) INIT_LIST_HEAD(&driver->clients); To solve the problem it is sufficient to do clients list head initialization before calling driver_register(). The problem was found while using an I2C device driver with a sluggish registration routine on a bus provided by a physically detachable I2C master controller, but practically the oops may be reproduced under the race between arbitraty I2C device driver registration and managing I2C bus device removal e.g. by unbinding the latter over sysfs: % echo 21a4000.i2c > /sys/bus/platform/drivers/imx-i2c/unbind Unable to handle kernel NULL pointer dereference at virtual address 00000000 Internal error: Oops: 17 [#1] SMP ARM CPU: 2 PID: 533 Comm: sh Not tainted 4.9.0-rc3+ #61 Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) task: e5ada400 task.stack: e4936000 PC is at i2c_do_del_adapter+0x20/0xcc LR is at __process_removed_adapter+0x14/0x1c Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 35bd004a DAC: 00000051 Process sh (pid: 533, stack limit = 0xe4936210) Stack: (0xe4937d28 to 0xe4938000) Backtrace: [<c0667be0>] (i2c_do_del_adapter) from [<c0667cc0>] (__process_removed_adapter+0x14/0x1c) [<c0667cac>] (__process_removed_adapter) from [<c0516998>] (bus_for_each_drv+0x6c/0xa0) [<c051692c>] (bus_for_each_drv) from [<c06685ec>] (i2c_del_adapter+0xbc/0x284) [<c0668530>] (i2c_del_adapter) from [<bf0110ec>] (i2c_imx_remove+0x44/0x164 [i2c_imx]) [<bf0110a8>] (i2c_imx_remove [i2c_imx]) from [<c051a838>] (platform_drv_remove+0x2c/0x44) [<c051a80c>] (platform_drv_remove) from [<c05183d8>] (__device_release_driver+0x90/0x12c) [<c0518348>] (__device_release_driver) from [<c051849c>] (device_release_driver+0x28/0x34) [<c0518474>] (device_release_driver) from [<c0517150>] (unbind_store+0x80/0x104) [<c05170d0>] (unbind_store) from [<c0516520>] (drv_attr_store+0x28/0x34) [<c05164f8>] (drv_attr_store) from [<c0298acc>] (sysfs_kf_write+0x50/0x54) [<c0298a7c>] (sysfs_kf_write) from [<c029801c>] (kernfs_fop_write+0x100/0x214) [<c0297f1c>] (kernfs_fop_write) from [<c0220130>] (__vfs_write+0x34/0x120) [<c02200fc>] (__vfs_write) from [<c0221088>] (vfs_write+0xa8/0x170) [<c0220fe0>] (vfs_write) from [<c0221e74>] (SyS_write+0x4c/0xa8) [<c0221e28>] (SyS_write) from [<c0108a20>] (ret_fast_syscall+0x0/0x1c) Signed-off-by:
Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Signed-off-by:
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Lance Richardson authored
commit 9ee6c5dc upstream. Some configurations (e.g. geneve interface with default MTU of 1500 over an ethernet interface with 1500 MTU) result in the transmission of packets that exceed the configured MTU. While this should be considered to be a "bad" configuration, it is still allowed and should not result in the sending of packets that exceed the configured MTU. Fix by dropping the assumption in ip_finish_output_gso() that locally originated gso packets will never need fragmentation. Basic testing using iperf (observing CPU usage and bandwidth) have shown no measurable performance impact for traffic not requiring fragmentation. Fixes: c7ba65d7 ("net: ip: push gso skb forwarding handling down the stack") Reported-by:
Jan Tluka <jtluka@redhat.com> Signed-off-by:
Lance Richardson <lrichard@redhat.com> Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
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Oliver Neukum authored
commit cf0ea4da upstream. Like many similar devices it needs a quirk to work. Issuing the request gets the device into an irrecoverable state. Signed-off-by:
Oliver Neukum <oneukum@suse.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
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Laura Abbott authored
commit 849eca7b upstream. Like other KVM switches, the Aten DVI KVM switch needs a quirk to avoid spewing errors: [791759.606542] usb 1-5.4: input irq status -75 received [791759.614537] usb 1-5.4: input irq status -75 received [791759.622542] usb 1-5.4: input irq status -75 received Add it. Signed-off-by:
Laura Abbott <labbott@fedoraproject.org> Signed-off-by:
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Stefan Richter authored
commit e9300a4b upstream. RFC 2734 defines the datagram_size field in fragment encapsulation headers thus: datagram_size: The encoded size of the entire IP datagram. The value of datagram_size [...] SHALL be one less than the value of Total Length in the datagram's IP header (see STD 5, RFC 791). Accordingly, the eth1394 driver of Linux 2.6.36 and older set and got this field with a -/+1 offset: ether1394_tx() /* transmit */ ether1394_encapsulate_prep() hdr->ff.dg_size = dg_size - 1; ether1394_data_handler() /* receive */ if (hdr->common.lf == ETH1394_HDR_LF_FF) dg_size = hdr->ff.dg_size + 1; else dg_size = hdr->sf.dg_size + 1; Likewise, I observe OS X 10.4 and Windows XP Pro SP3 to transmit 1500 byte sized datagrams in fragments with datagram_size=1499 if link fragmentation is required. Only firewire-net sets and gets datagram_size without this offset. The result is lacking interoperability of firewire-net with OS X, Windows XP, and presumably Linux' eth1394. (I did not test with the latter.) For example, FTP data transfers to a Linux firewire-net box with max_rec smaller than the 1500 bytes MTU - from OS X fail entirely, - from Win XP start out with a bunch of fragmented datagrams which time out, then continue with unfragmented datagrams because Win XP temporarily reduces the MTU to 576 bytes. So let's fix firewire-net's datagram_size accessors. Note that firewire-net thereby loses interoperability with unpatched firewire-net, but only if link fragmentation is employed. (This happens with large broadcast datagrams, and with large datagrams on several FireWire CardBus cards with smaller max_rec than equivalent PCI cards, and it can be worked around by setting a small enough MTU.) Signed-off-by:
Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by:
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John David Anglin authored
commit 6ed51832 upstream. We have one critical section in the syscall entry path in which we switch from the userspace stack to kernel stack. In the event of an external interrupt, the interrupt code distinguishes between those two states by analyzing the value of sr7. If sr7 is zero, it uses the kernel stack. Therefore it's important, that the value of sr7 is in sync with the currently enabled stack. This patch now disables interrupts while executing the critical section. This prevents the interrupt handler to possibly see an inconsistent state which in the worst case can lead to crashes. Interestingly, in the syscall exit path interrupts were already disabled in the critical section which switches back to the userspace stack. Signed-off-by:
John David Anglin <dave.anglin@bell.net> Signed-off-by:
Helge Deller <deller@gmx.de> Signed-off-by:
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Eli Cooper authored
commit 23f4ffed upstream. skb->cb may contain data from previous layers. In the observed scenario, the garbage data were misinterpreted as IP6CB(skb)->frag_max_size, so that small packets sent through the tunnel are mistakenly fragmented. This patch unconditionally clears the control buffer in ip6tunnel_xmit(), which affects ip6_tunnel, ip6_udp_tunnel and ip6_gre. Currently none of these tunnels set IP6CB(skb)->flags, otherwise it needs to be done earlier. Signed-off-by:
Eli Cooper <elicooper@gmx.com> Signed-off-by:
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Johan Hovold authored
commit ceb75787 upstream. Make sure to drop the reference taken by class_find_device() after opening the RTC device. Fixes: 77437fd4 (pm: boot time suspend selftest) Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Jason Gunthorpe authored
commit 812d4788 upstream. This fixes the irq allocation in this driver to not print: irq: Cannot allocate irq_descs @ IRQ34, assuming pre-allocated irq: Cannot allocate irq_descs @ IRQ66, assuming pre-allocated Which happens because the driver already called irq_alloc_descs() and so the change to use irq_domain_add_simple resulted in calling irq_alloc_descs() twice. Modernize the irq allocation in this driver to use the irq_domain_add_linear flow directly and eliminate the use of irq_domain_add_simple/legacy Fixes: ce931f57 ("gpio/mvebu: convert to use irq_domain_add_simple()") Signed-off-by:
Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> [bwh: Backported to 3.16: - Keep using irq_set_handler_data(), irq_set_chained_handler() - Adjust context] Signed-off-by:
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Johan Hovold authored
commit d6124b40 upstream. This subsystem consistently fails to drop the device reference taken by class_find_device(). Note that some of these lookup functions already take a reference to the returned data, while others claim no reference is needed (or does not seem need one). Fixes: 183b9b59 ("uwb: add the UWB stack (core files)") Signed-off-by:
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Felipe Balbi authored
commit fd9afd3c upstream. According to Dave Miller "the networking stack has a hard requirement that all SKBs which are transmitted must have their completion signalled in a fininte amount of time. This is because, until the SKB is freed by the driver, it holds onto socket, netfilter, and other subsystem resources." In summary, this means that using TX IRQ throttling for the networking gadgets is, at least, complex and we should avoid it for the time being. Reported-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Tested-by:
Felipe Balbi <felipe.balbi@linux.intel.com> [bwh: Backported to 3.16: adjust filename, context] Signed-off-by:
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Andy Gospodarek authored
commit fcdefcca upstream. Current bgmac code initializes some DMA settings in the receive control register for some hardware and then immediately clears those settings. Not clearing those settings results in ~420Mbps *improvement* in throughput; this system can now receive frames at line-rate on Broadcom 5871x hardware compared to ~520Mbps today. I also tested a few other values but found there to be no discernible difference in CPU utilization even if burst size and prefetching values are different. On the hardware tested there was no need to keep the code that cleared all but bits 16-17, but since there is a wide variety of hardware that used this driver (I did not look at all hardware docs for hardware using this IP block), I find it wise to move this call up and clear bits just after reading the default value from the hardware rather than completely removing it. This is a good candidate for -stable >=3.14 since that is when the code that was supposed to improve performance (but did not) was introduced. Signed-off-by:
Andy Gospodarek <gospo@broadcom.com> Fixes: 56ceecde ("bgmac: initialize the DMA controller of core...") Cc: Hauke Mehrtens <hauke@hauke-m.de> Acked-by:
Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by:
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Oliver Hartkopp authored
commit deb507f9 upstream. Andrey Konovalov reported an issue with proc_register in bcm.c. As suggested by Cong Wang this patch adds a lock_sock() protection and a check for unsuccessful proc_create_data() in bcm_connect(). Reference: http://marc.info/?l=linux-netdev&m=147732648731237Reported-by:
Andrey Konovalov <andreyknvl@google.com> Suggested-by:
Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
Oliver Hartkopp <socketcan@hartkopp.net> Acked-by:
Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by:
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Jakub Sitnicki authored
commit f89c56ce upstream. Similar to commit c146066a ("ipv4: Don't use ufo handling on later transformed packets"), don't perform UFO on packets that will be IPsec transformed. To detect it we rely on the fact that headerlen in dst_entry is non-zero only for transformation bundles (xfrm_dst objects). Unwanted segmentation can be observed with a NETIF_F_UFO capable device, such as a dummy device: DEV=dum0 LEN=1493 ip li add $DEV type dummy ip addr add fc00::1/64 dev $DEV nodad ip link set $DEV up ip xfrm policy add dir out src fc00::1 dst fc00::2 \ tmpl src fc00::1 dst fc00::2 proto esp spi 1 ip xfrm state add src fc00::1 dst fc00::2 \ proto esp spi 1 enc 'aes' 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b tcpdump -n -nn -i $DEV -t & socat /dev/zero,readbytes=$LEN udp6:[fc00::2]:$LEN tcpdump output before: IP6 fc00::1 > fc00::2: frag (0|1448) ESP(spi=0x00000001,seq=0x1), length 1448 IP6 fc00::1 > fc00::2: frag (1448|48) IP6 fc00::1 > fc00::2: ESP(spi=0x00000001,seq=0x2), length 88 ... and after: IP6 fc00::1 > fc00::2: frag (0|1448) ESP(spi=0x00000001,seq=0x1), length 1448 IP6 fc00::1 > fc00::2: frag (1448|80) Fixes: e89e9cf5 ("[IPv4/IPv6]: UFO Scatter-gather approach") Signed-off-by:
Jakub Sitnicki <jkbs@redhat.com> Acked-by:
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Alexander Usyskin authored
commit 582ab27a upstream. NFC version reply size checked against only header size, not against full message size. That may lead potentially to uninitialized memory access in version data. That leads to warnings when version data is accessed: drivers/misc/mei/bus-fixup.c: warning: '*((void *)&ver+11)' may be used uninitialized in this function [-Wuninitialized]: => 212:2 Reported in Build regressions/improvements in v4.9-rc3 https://lkml.org/lkml/2016/10/30/57 Fixes: 59fcd7c6 (mei: nfc: Initial nfc implementation) Signed-off-by:
Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by:
Tomas Winkler <tomas.winkler@intel.com> Signed-off-by:
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Liping Zhang authored
commit c17c3cdf upstream. When the memory is exhausted, then we will fail to add the NFT_MSG_NEWSET transaction. In such case, we should destroy the set before we free it. Fixes: 958bee14 ("netfilter: nf_tables: use new transaction infrastructure to handle sets") Signed-off-by:
Liping Zhang <zlpnobody@gmail.com> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Matt Redfearn authored
commit 34563769 upstream. Commit c6017e79 ("virtio: console: add locks around buffer removal in port unplug path") added locking around the freeing of buffers in the vq. However, when free_buf() is called with can_sleep = true and rproc is enabled, it calls dma_free_coherent() directly, requiring interrupts to be enabled. Currently a WARNING is triggered due to the spin locking around free_buf, with a call stack like this: WARNING: CPU: 3 PID: 121 at ./include/linux/dma-mapping.h:433 free_buf+0x1a8/0x288 Call Trace: [<8040c538>] show_stack+0x74/0xc0 [<80757240>] dump_stack+0xd0/0x110 [<80430d98>] __warn+0xfc/0x130 [<80430ee0>] warn_slowpath_null+0x2c/0x3c [<807e7c6c>] free_buf+0x1a8/0x288 [<807ea590>] remove_port_data+0x50/0xac [<807ea6a0>] unplug_port+0xb4/0x1bc [<807ea858>] virtcons_remove+0xb0/0xfc [<807b6734>] virtio_dev_remove+0x58/0xc0 [<807f918c>] __device_release_driver+0xac/0x134 [<807f924c>] device_release_driver+0x38/0x50 [<807f7edc>] bus_remove_device+0xfc/0x130 [<807f4b74>] device_del+0x17c/0x21c [<807f4c38>] device_unregister+0x24/0x38 [<807b6b50>] unregister_virtio_device+0x28/0x44 Fix this by restructuring the loops to allow the locks to only be taken where it is necessary to protect the vqs, and release it while the buffer is being freed. Fixes: c6017e79 ("virtio: console: add locks around buffer removal in port unplug path") Signed-off-by:
Matt Redfearn <matt.redfearn@imgtec.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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Ashok Raj authored
commit 1c387188 upstream. The VT-d specification (§8.3.3) says: ‘Virtual Functions’ of a ‘Physical Function’ are under the scope of the same remapping unit as the ‘Physical Function’. The BIOS is not required to list all the possible VFs in the scope tables, and arguably *shouldn't* make any attempt to do so, since there could be a huge number of them. This has been broken basically for ever — the VF is never going to match against a specific unit's scope, so it ends up being assigned to the INCLUDE_ALL IOMMU. Which was always actually correct by coincidence, but now we're looking at Root-Complex integrated devices with SR-IOV support it's going to start being wrong. Fix it to simply use pci_physfn() before doing the lookup for PCI devices. Signed-off-by:
Sainath Grandhi <sainath.grandhi@intel.com> Signed-off-by:
Ashok Raj <ashok.raj@intel.com> Signed-off-by:
David Woodhouse <dwmw2@infradead.org> Signed-off-by:
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Boris Brezillon authored
commit 7e251bb2 upstream. The current ndelay() macro definition has an extra semi-colon at the end of the line thus leading to a compilation error when ndelay is used in a conditional block without curly braces like this one: if (cond) ndelay(t); else ... which, after the preprocessor pass gives: if (cond) m68k_ndelay(t);; else ... thus leading to the following gcc error: error: 'else' without a previous 'if' Remove this extra semi-colon. Signed-off-by:
Boris Brezillon <boris.brezillon@free-electrons.com> Fixes: c8ee038b ("m68k: Implement ndelay() based on the existing udelay() logic") Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Jack Morgenstein authored
commit d2582a03 upstream. mlx4_en_DUMP_ETH_STATS took the *counter mutex* and then called the FW command, with WRAPPED attribute. As a result, the fw command is wrapped on the Hypervisor when it calls mlx4_en_DUMP_ETH_STATS. The FW command wrapper flow on the hypervisor takes the *slave_cmd_mutex* during processing. At the same time, a VF could be in the process of coming up, and could call mlx4_QUERY_FUNC_CAP. On the hypervisor, the command flow takes the *slave_cmd_mutex*, then executes mlx4_QUERY_FUNC_CAP_wrapper. mlx4_QUERY_FUNC_CAP wrapper calls mlx4_get_default_counter_index(), which takes the *counter mutex*. DEADLOCK. The fix is that the DUMP_ETH_STATS fw command should be called with the NATIVE attribute, so that on the hypervisor, this command does not enter the wrapper flow. Since the Hypervisor no longer goes through the wrapper code, we also simply return 0 in mlx4_DUMP_ETH_STATS_wrapper (i.e.the function succeeds, but the returned data will be all zeroes). No need to test if it is the Hypervisor going through the wrapper. Fixes: f9baff50 ("mlx4_core: Add "native" argument to mlx4_cmd ...") Signed-off-by:
Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
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Erez Shitrit authored
commit 8d59de8f upstream. Currently there is a race between incoming traffic and initialization flow. HW is able to receive the packets after INIT_PORT is done and unicast steering is configured. Before we set priv->port_up NAPI is not scheduled and receive queues become full. Therefore we never get new interrupts about the completions. This issue could happen if running heavy traffic during bringing port up. The resolution is to schedule NAPI once port_up is set. If receive queues were full this will process all cqes and release them. Fixes: c27a02cd ("mlx4_en: Add driver for Mellanox ConnectX 10GbE NIC") Signed-off-by:
Erez Shitrit <erezsh@mellanox.com> Signed-off-by:
Eugenia Emantayev <eugenia@mellanox.com> Signed-off-by:
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Eugenia Emantayev authored
commit 4850cf45 upstream. When doing roundup_pow_of_two for large enough number with bit 31, an overflow will occur and a value equal to 1 will be returned. In this case 1 will be subtracted from the return value and division by zero will be reached. Fixes: 31c128b6 ("net/mlx4_en: Choose time-stamping shift value according to HW frequency") Signed-off-by:
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Jack Morgenstein authored
commit aa0c08fe upstream. The resource type enum in the resource tracker was incorrect. RES_EQ was put in the position of RES_NPORT_ID (a FC resource). Since the remaining resources maintain their current values, and RES_EQ is not passed from slaves to the hypervisor in any FW command, this change affects only the hypervisor. Therefore, there is no backwards-compatibility issue. Fixes: 623ed84b ("mlx4_core: initial header-file changes for SRIOV support") Signed-off-by:
Moshe Shemesh <moshe@mellanox.com> Signed-off-by:
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Willem de Bruijn authored
commit 104ba78c upstream. When transmitting on a packet socket with PACKET_VNET_HDR and PACKET_QDISC_BYPASS, validate device support for features requested in vnet_hdr. Drop TSO packets sent to devices that do not support TSO or have the feature disabled. Note that the latter currently do process those packets correctly, regardless of not advertising the feature. Because of SKB_GSO_DODGY, it is not sufficient to test device features with netif_needs_gso. Full validate_xmit_skb is needed. Switch to software checksum for non-TSO packets that request checksum offload if that device feature is unsupported or disabled. Note that similar to the TSO case, device drivers may perform checksum offload correctly even when not advertising it. When switching to software checksum, packets hit skb_checksum_help, which has two BUG_ON checksum not in linear segment. Packet sockets always allocate at least up to csum_start + csum_off + 2 as linear. Tested by running github.com/wdebruij/kerneltools/psock_txring_vnet.c ethtool -K eth0 tso off tx on psock_txring_vnet -d $dst -s $src -i eth0 -l 2000 -n 1 -q -v psock_txring_vnet -d $dst -s $src -i eth0 -l 2000 -n 1 -q -v -N ethtool -K eth0 tx off psock_txring_vnet -d $dst -s $src -i eth0 -l 1000 -n 1 -q -v -G psock_txring_vnet -d $dst -s $src -i eth0 -l 1000 -n 1 -q -v -G -N v2: - add EXPORT_SYMBOL_GPL(validate_xmit_skb_list) Fixes: d346a3fa ("packet: introduce PACKET_QDISC_BYPASS socket option") Signed-off-by:
Willem de Bruijn <willemb@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Acked-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
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Noa Osherovich authored
commit 6b276190 upstream. Currently the firmware can't work with a page with dma address 0. Passing such an address to the firmware will cause the give_pages command to fail. To avoid this, in case we get a 0 dma address of a page from the dma engine, we avoid passing it to FW by remapping to get an address other than 0. Fixes: bf0bf77f ('mlx5: Support communicating arbitrary host...') Signed-off-by:
Noa Osherovich <noaos@mellanox.com> Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Signed-off-by:
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NeilBrown authored
commit 1217e1d1 upstream. mddev->curr_resync usually records where the current resync is up to, but during the starting phase it has some "magic" values. 1 - means that the array is trying to start a resync, but has yielded to another array which shares physical devices, and also needs to start a resync 2 - means the array is trying to start resync, but has found another array which shares physical devices and has already started resync. 3 - means that resync has commensed, but it is possible that nothing has actually been resynced yet. It is important that this value not be visible to user-space and particularly that it doesn't get written to the metadata, as the resync or recovery checkpoint. In part, this is because it may be slightly higher than the correct value, though this is very rare. In part, because it is not a multiple of 4K, and some devices only support 4K aligned accesses. There are two places where this value is propagates into either ->curr_resync_completed or ->recovery_cp or ->recovery_offset. These currently avoid the propagation of values 1 and 3, but will allow 3 to leak through. Change them to only propagate the value if it is > 3. As this can cause an array to fail, the patch is suitable for -stable. Reported-by:
Viswesh <viswesh.vichu@gmail.com> Signed-off-by:
NeilBrown <neilb@suse.com> Signed-off-by:
Shaohua Li <shli@fb.com> [bwh: Backported to 3.16: there is only one comparison to fix] Signed-off-by:
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Richard Weinberger authored
commit a00052a2 upstream. Commit c83ed4c9 ("ubifs: Abort readdir upon error") broke overlayfs support because the fix exposed an internal error code to VFS. Reported-by:
Peter Rosin <peda@axentia.se> Tested-by:
Ralph Sennhauser <ralph.sennhauser@gmail.com> Tested-by:
Richard Weinberger <richard@nod.at> [bwh: Backported to 3.16: adjust context] Signed-off-by:
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Gerald Schaefer authored
commit a7a7aeef upstream. When interrupting an application which was allocating DMAable memory, it was possible, that the DMA memory was deallocated twice, leading to the error symptoms below. Thanks to Gerald, who analyzed the problem and provided this patch. I agree with his analysis of the problem: ddcb_cmd_fixups() -> genwqe_alloc_sync_sgl() (fails in f/lpage, but sgl->sgl != NULL and f/lpage maybe also != NULL) -> ddcb_cmd_cleanup() -> genwqe_free_sync_sgl() (double free, because sgl->sgl != NULL and f/lpage maybe also != NULL) In this scenario we would have exactly the kind of double free that would explain the WARNING / Bad page state, and as expected it is caused by broken error handling (cleanup). Using the Ubuntu git source, tag Ubuntu-4.4.0-33.52, he was able to reproduce the "Bad page state" issue, and with the patch on top he could not reproduce it any more. ------------[ cut here ]------------ WARNING: at /build/linux-o03cxz/linux-4.4.0/arch/s390/include/asm/pci_dma.h:141 Modules linked in: qeth_l2 ghash_s390 prng aes_s390 des_s390 des_generic sha512_s390 sha256_s390 sha1_s390 sha_common genwqe_card qeth crc_itu_t qdio ccwgroup vmur dm_multipath dasd_eckd_mod dasd_mod CPU: 2 PID: 3293 Comm: genwqe_gunzip Not tainted 4.4.0-33-generic #52-Ubuntu task: 0000000032c7e270 ti: 00000000324e4000 task.ti: 00000000324e4000 Krnl PSW : 0404c00180000000 0000000000156346 (dma_update_cpu_trans+0x9e/0xa8) R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3 Krnl GPRS: 00000000324e7bcd 0000000000c3c34a 0000000027628298 000000003215b400 0000000000000400 0000000000001fff 0000000000000400 0000000116853000 07000000324e7b1e 0000000000000001 0000000000000001 0000000000000001 0000000000001000 0000000116854000 0000000000156402 00000000324e7a38 Krnl Code: 000000000015633a: 95001000 cli 0(%r1),0 000000000015633e: a774ffc3 brc 7,1562c4 #0000000000156342: a7f40001 brc 15,156344 >0000000000156346: 92011000 mvi 0(%r1),1 000000000015634a: a7f4ffbd brc 15,1562c4 000000000015634e: 0707 bcr 0,%r7 0000000000156350: c00400000000 brcl 0,156350 0000000000156356: eb7ff0500024 stmg %r7,%r15,80(%r15) Call Trace: ([<00000000001563e0>] dma_update_trans+0x90/0x228) [<00000000001565dc>] s390_dma_unmap_pages+0x64/0x160 [<00000000001567c2>] s390_dma_free+0x62/0x98 [<000003ff801310ce>] __genwqe_free_consistent+0x56/0x70 [genwqe_card] [<000003ff801316d0>] genwqe_free_sync_sgl+0xf8/0x160 [genwqe_card] [<000003ff8012bd6e>] ddcb_cmd_cleanup+0x86/0xa8 [genwqe_card] [<000003ff8012c1c0>] do_execute_ddcb+0x110/0x348 [genwqe_card] [<000003ff8012c914>] genwqe_ioctl+0x51c/0xc20 [genwqe_card] [<000000000032513a>] do_vfs_ioctl+0x3b2/0x518 [<0000000000325344>] SyS_ioctl+0xa4/0xb8 [<00000000007b86c6>] system_call+0xd6/0x264 [<000003ff9e8e520a>] 0x3ff9e8e520a Last Breaking-Event-Address: [<0000000000156342>] dma_update_cpu_trans+0x9a/0xa8 ---[ end trace 35996336235145c8 ]--- BUG: Bad page state in process jbd2/dasdb1-8 pfn:3215b page:000003d100c856c0 count:-1 mapcount:0 mapping: (null) index:0x0 flags: 0x3fffc0000000000() page dumped because: nonzero _count Signed-off-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
Frank Haverkamp <haver@linux.vnet.ibm.com> Signed-off-by:
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Ido Yariv authored
commit bd768e14 upstream. vcpu->arch.wbinvd_dirty_mask may still be used after freeing it, corrupting memory. For example, the following call trace may set a bit in an already freed cpu mask: kvm_arch_vcpu_load vcpu_load vmx_free_vcpu_nested vmx_free_vcpu kvm_arch_vcpu_free Fix this by deferring freeing of wbinvd_dirty_mask. Signed-off-by:
Ido Yariv <ido@wizery.com> Reviewed-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> [bwh: Backported to 3.16: adjust context] Signed-off-by:
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Michael Holzheu authored
commit 237d6e68 upstream. Since commit d86bd1be ("mm/slub: support left redzone") it is no longer guaranteed that kmalloc(PAGE_SIZE) returns page aligned memory. After the above commit we get an error for diag224 because aligned memory is required. This leads to the following user visible error: # mount none -t s390_hypfs /sys/hypervisor/ mount: unknown filesystem type 's390_hypfs' # dmesg | grep hypfs hypfs.cccfb8: The hardware system does not provide all functions required by hypfs hypfs.7a79f0: Initialization of hypfs failed with rc=-61 Fix this problem and use get_free_page() instead of kmalloc() to get correctly aligned memory. Signed-off-by:
Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Daniel Mentz authored
commit 62e931fa upstream. gen_pool_alloc_algo() iterates over the chunks of a pool trying to find a contiguous block of memory that satisfies the allocation request. The shortcut if (size > atomic_read(&chunk->avail)) continue; makes the loop skip over chunks that do not have enough bytes left to fulfill the request. There are two situations, though, where an allocation might still fail: (1) The available memory is not contiguous, i.e. the request cannot be fulfilled due to external fragmentation. (2) A race condition. Another thread runs the same code concurrently and is quicker to grab the available memory. In those situations, the loop calls pool->algo() to search the entire chunk, and pool->algo() returns some value that is >= end_bit to indicate that the search failed. This return value is then assigned to start_bit. The variables start_bit and end_bit describe the range that should be searched, and this range should be reset for every chunk that is searched. Today, the code fails to reset start_bit to 0. As a result, prefixes of subsequent chunks are ignored. Memory allocations might fail even though there is plenty of room left in these prefixes of those other chunks. Fixes: 7f184275 ("lib, Make gen_pool memory allocator lockless") Link: http://lkml.kernel.org/r/1477420604-28918-1-git-send-email-danielmentz@google.comSigned-off-by:
Daniel Mentz <danielmentz@google.com> Reviewed-by:
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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