- 18 Nov, 2016 37 commits
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Bill Kuzeja authored
commit a5dd506e upstream. A system can get hung task timeouts if a qlogic board fails during initialization (if the board breaks again or fails the init). The hang involves the scsi scan. In a nutshell, since commit beb9e315 ("qla2xxx: Prevent removal and board_disable race"): ...it is possible to have freed ha (base_vha->hw) early by a call to qla2x00_remove_one when pdev->enable_cnt equals zero: if (!atomic_read(&pdev->enable_cnt)) { scsi_host_put(base_vha->host); kfree(ha); pci_set_drvdata(pdev, NULL); return; Almost always, the scsi_host_put above frees the vha structure (attached to the end of the Scsi_Host we're putting) since it's the last put, and life is good. However, if we are entering this routine because the adapter has broken sometime during initialization AND a scsi scan is already in progress (and has done its own scsi_host_get), vha will not be freed. What's worse, the scsi scan will access the freed ha structure through qla2xxx_scan_finished: if (time > vha->hw->loop_reset_delay * HZ) return 1; The scsi scan keeps checking to see if a scan is complete by calling qla2xxx_scan_finished. There is a timeout value that limits the length of time a scan can take (hw->loop_reset_delay, usually set to 5 seconds), but this definition is in the data structure (hw) that can get freed early. This can yield unpredictable results, the worst of which is that the scsi scan can hang indefinitely. This happens when the freed structure gets reused and loop_reset_delay gets overwritten with garbage, which the scan obliviously uses as its timeout value. The fix for this is simple: at the top of qla2xxx_scan_finished, check for the UNLOADING bit in the vha structure (_vha is not freed at this point). If UNLOADING is set, we exit the scan for this adapter immediately. After this last reference to the ha structure, we'll exit the scan for this adapter, and continue on. This problem is hard to hit, but I have run into it doing negative testing many times now (with a test specifically designed to bring it out), so I can verify that this fix works. My testing has been against a RHEL7 driver variant, but the bug and patch are equally relevant to to the upstream driver. Fixes: beb9e315 ("qla2xxx: Prevent removal and board_disable race") Signed-off-by:
Bill Kuzeja <william.kuzeja@stratus.com> Acked-by:
Himanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Lorenzo Bianconi authored
commit d304286a upstream. fix scale configuration/parsing for h3lis331dl accel driver when sensitivity is higher than 1(m/s^2)/digit Signed-off-by:
Lorenzo Bianconi <lorenzo.bianconi@st.com> Fixes: 1e52fefc ("iio: accel: Add support for the h3lis331dl accelerometer") Signed-off-by:
Jonathan Cameron <jic23@kernel.org> Signed-off-by:
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Song Hongyan authored
commit 8af644a7 upstream. This fix makes newer ISH hubs work. Previous ones worked by lucky coincidence. Rotation sensor function does not work due to miss PM function. Add common hid sensor iio pm function for rotation sensor. Further clarification from Srinivas: If CONFIG_PM is not defined, then this prevents this sensor to function. So above commit caused this. This sensor was supposed to be always on to trigger wake up in prior external hubs. But with the new ISH hub this is not the case. Signed-off-by:
Song Hongyan <hongyan.song@intel.com> Fixes: 2b89635e ("iio: hid_sensor_hub: Common PM functions") 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:
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by:
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Oliver Neukum authored
commit 7309aa84 upstream. variable struct usb_cdc_parsed_header h may be used uninitialized in acm_probe. In kernel 4.8. /* handle quirks deadly to normal probing*/ if (quirks == NO_UNION_NORMAL) ... goto skip_normal_probe; } we bypass call to cdc_parse_cdc_header(&h, intf, buffer, buflen); but later use h in if (h.usb_cdc_country_functional_desc) { /* export the country data */ Signed-off-by:
Oliver Neukum <oneukum@suse.com> Reported-by:
Victor Sologoubov <victor0@rambler.ru> Signed-off-by:
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Scott Wood authored
commit 7c1c5413 upstream. The boot-time frequency of a CPU is considered its rated maximum, as we have no other source of such information. However, this was previously only used for chips with 80% restrictions on secondary PLLs. This usually wasn't a problem because most chips/configs boot with a divider of /1, with other dividers being used only for dynamic frequency reduction. However, at least one config (LS1021A at less than 1 GHz) uses a different divider for top speed. This was causing cpufreq to set a frequency beyond the chip's rated speed. This is fixed by applying a 100%-of-initial-speed limit to all CPU PLLs, similar to the existing 80% limit that only applied to some. Signed-off-by:
Scott Wood <oss@buserror.net> Signed-off-by:
Stephen Boyd <sboyd@codeaurora.org> Signed-off-by:
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Azael Avalos authored
commit 1c80e960 upstream. Bug 150611 uncovered that the WMI ID used by the toshiba-wmi driver is not Toshiba specific, and as such, the driver was being loaded on non Toshiba laptops too. This patch adds a DMI matching list checking for TOSHIBA as the vendor, refusing to load if it is not. Also the WMI GUID was renamed, dropping the TOSHIBA_ prefix, to better reflect that such GUID is not a Toshiba specific one. Signed-off-by:
Azael Avalos <coproscefalo@gmail.com> Signed-off-by:
Darren Hart <dvhart@linux.intel.com> Signed-off-by:
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Richard Weinberger authored
commit d8e9e5e8 upstream. Don't pass a size larger than iov_len to kernel_sendmsg(). Otherwise it will cause a NULL pointer deref when kernel_sendmsg() returns with rv < size. DRBD as external module has been around in the kernel 2.4 days already. We used to be compatible to 2.4 and very early 2.6 kernels, we used to use rv = sock_sendmsg(sock, &msg, iov.iov_len); then later changed to rv = kernel_sendmsg(sock, &msg, &iov, 1, size); when we should have used rv = kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len); tcp_sendmsg() used to totally ignore the size parameter. 57be5bda ip: convert tcp_sendmsg() to iov_iter primitives changes that, and exposes our long standing error. Even with this error exposed, to trigger the bug, we would need to have an environment (config or otherwise) causing us to not use sendpage() for larger transfers, a failing connection, and have it fail "just at the right time". Apparently that was unlikely enough for most, so this went unnoticed for years. Still, it is known to trigger at least some of these, and suspected for the others: [0] http://lists.linbit.com/pipermail/drbd-user/2016-July/023112.html [1] http://lists.linbit.com/pipermail/drbd-dev/2016-March/003362.html [2] https://forums.grsecurity.net/viewtopic.php?f=3&t=4546 [3] https://ubuntuforums.org/showthread.php?t=2336150 [4] http://e2.howsolveproblem.com/i/1175162/ This should go into 4.9, and into all stable branches since and including v4.0, which is the first to contain the exposing change. It is correct for all stable branches older than that as well (which contain the DRBD driver; which is 2.6.33 and up). It requires a small "conflict" resolution for v4.4 and earlier, with v4.5 we dropped the comment block immediately preceding the kernel_sendmsg(). Fixes: b411b363 ("The DRBD driver") Cc: viro@zeniv.linux.org.uk Cc: christoph.lechleitner@iteg.at Cc: wolfgang.glas@iteg.at Reported-by:
Christoph Lechleitner <christoph.lechleitner@iteg.at> Tested-by:
Richard Weinberger <richard@nod.at> [changed oneliner to be "obvious" without context; more verbose message] Signed-off-by:
Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by:
Jens Axboe <axboe@fb.com> 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:
David Miller <davem@davemloft.net> Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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Johan Hovold authored
commit 18266403 upstream. The TIOCMIWAIT implementation would return -EINVAL if any of the three supported signals were included in the mask. Instead of returning an error in case TIOCM_CTS is included, simply drop the mask check completely, which is in accordance with how other drivers implement this ioctl. Fixes: 5a6a62bd ("cdc-acm: add TIOCMIWAIT") Signed-off-by:
Johan Hovold <johan@kernel.org> Acked-by:
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Vivek Gautam authored
commit 9b9d7cdd upstream. Fixing the sequence of events in dwc3_core_init() error exit path. dwc3_core_exit() call is also removed from the error path since, whatever it's doing is already done. Fixes: c499ff71 usb: dwc3: core: re-factor init and exit paths Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Cc: Greg KH <gregkh@linuxfoundation.org> Signed-off-by:
Vivek Gautam <vivek.gautam@codeaurora.org> 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:
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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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Ian Abbott authored
commit 55abe816 upstream. `ni_tio_clock_period_ps()` used to return the clock period in picoseconds, and had a `BUG()` call for invalid cases. It was changed to pass the clock period back via a pointer parameter and return an error for the invalid cases. Unfortunately the code to handle user-specified clock sources with user-specified clock period is still returning the clock period the old way, which can lead to the caller not getting the clock period, or seeing an unexpected error. Fix it by passing the clock period via the pointer parameter and returning `0`. Fixes: b42ca86a ("staging: comedi: ni_tio: remove BUG() checks for ni_tio_get_clock_src()") Signed-off-by:
Ian Abbott <abbotti@mev.co.uk> Signed-off-by:
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Huacai Chen authored
commit 33c027ae upstream. Early commit 30ca5cb6 ("staging: sm750fb: change definition of PANEL_PLANE_TL fields") and 27b047bb ("staging: sm750fb: change definition of PANEL_PLANE_BR fields") modify the register bit fields definitions. But the modifications are wrong, because the bit mask of "bit field 10:0" is not 0xeff, but 0x7ff. The wrong definition bugs makes display very strange. Signed-off-by:
Huacai Chen <chenhc@lemote.com> Signed-off-by:
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Arnd Bergmann authored
commit 34eee70a upstream. The ad5933_i2c_read function returns an error code to indicate whether it could read data or not. However ad5933_work() ignores this return code and just accesses the data unconditionally, which gets detected by gcc as a possible bug: drivers/staging/iio/impedance-analyzer/ad5933.c: In function 'ad5933_work': drivers/staging/iio/impedance-analyzer/ad5933.c:649:16: warning: 'status' may be used uninitialized in this function [-Wmaybe-uninitialized] This adds minimal error handling so we only evaluate the data if it was correctly read. Link: https://patchwork.kernel.org/patch/8110281/Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
Lars-Peter Clausen <lars@metafoo.de> Signed-off-by:
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Ulf Hansson authored
commit fe1b5700 upstream. In the eMMC 4.51 version of the spec, an EXT_CSD field called GENERIC_CMD6_TIME[248] was added. This allows cards to specify the maximum time it may need to move out from its busy state, when a CMD6 command has been sent. In cases when the card is compliant to versions < 4.51 of the eMMC spec, obviously the core needs to use a fall-back value for this timeout, which currently is set to 10 minutes. This value is completely in the wrong range and importantly in some cases it causes a card initialization to take more than 10 minute to complete. Earlier this scenario was avoided as the mmc core used CMD13 to poll the card, to find out when it stopped signaling busy. Commit 08573eaf ("mmc: mmc: do not use CMD13 to get status after speed mode switch") changed this behavior. Instead of reverting that commit, which would cause other issues, let's instead start by picking a simple solution for the problem, by using a 500ms default generic CMD6 timeout. The reason for using exactly 500ms, comes from observations that shows it's quite common for cards to specify 250ms. 500ms is two times that value so likely it should be enough for most cards. Fixes: 08573eaf ("mmc: mmc: do not use CMD13 to get status after speed mode switch") Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Tested-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Adrian Hunter authored
commit 69b962a6 upstream. In the busy response case (i.e. !host->data), an unexpected data interrupt would result in clearing the data command as though it had completed but without informing the upper layers and thus resulting in a hang. Fix by only clearing the data command for data interrupts that are expected. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Signed-off-by:
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Adrian Hunter authored
commit 6ebebeab upstream. CMD line reset during an ongoing data transfer can cause the data transfer to hang. Fix by delaying the reset until the data transfer is finished. Signed-off-by:
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Laura Abbott authored
commit c25badc9 upstream. When converting to a shared library in ac5a181d ("cpupower: Add cpuidle parts into library"), cpu_freq_cpu_exists() was converted to cpupower_is_cpu_online(). cpu_req_cpu_exists() returned 0 on success and -ENOSYS on failure whereas cpupower_is_cpu_online returns 1 on success. Check for the correct return value in cpufreq-set. Link: https://bugzilla.redhat.com/show_bug.cgi?id=1374212 Fixes: ac5a181d (cpupower: Add cpuidle parts into library) Reported-by:
Julian Seward <jseward@acm.org> Signed-off-by:
Laura Abbott <labbott@redhat.com> Acked-by:
Thomas Renninger <trenn@suse.com> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Mika Westerberg authored
commit d2cdf5dc upstream. When the system is suspended to S3 the BIOS might re-initialize certain GPIO pins back to their original state or it may re-program interrupt mask of others. For example Acer TravelMate B116-M had BIOS bug where certain GPIO pin (MF_ISH_GPIO_5) was programmed to trigger on high level, and the pin state was high once the BIOS gave control to the OS on resume. This triggers lots of messages like: irq 117, desc: ffff88017a61e600, depth: 1, count: 0, unhandled: 0 ->handle_irq(): ffffffff8109b613, handle_bad_irq+0x0/0x1e0 ->irq_data.chip(): ffffffffa0020180, chv_pinctrl_exit+0x2d84/0x12 [pinctrl_cherryview] ->action(): (null) IRQ_NOPROBE set We reset the mask back to known state in chv_pinctrl_resume() but that is called only after device interrupts have already been enabled. Now, this particular issue was fixed by upgrading the BIOS to the latest (v1.23) but not everybody upgrades their BIOSes so we fix it up in the driver as well. Prevent the possible interrupt storm by moving suspend and resume hooks to be called at _noirq time instead. Since device interrupts are still disabled we can restore the mask back to known state before interrupt storm happens. Reported-by:
Christian Steiner <christian.steiner@outlook.de> Signed-off-by:
Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by:
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Mika Westerberg authored
commit 56211121 upstream. If async suspend is enabled, the driver may access registers concurrently with another instance which may fail because of the bug in Cherryview GPIO hardware. Prevent this by taking the shared lock while accessing the hardware in suspend and resume hooks. Signed-off-by:
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Alexey Brodkin authored
commit a79a8121 upstream. We used to use generic implementation of dma_map_ops.mmap which is dma_common_mmap() but that only worked for simpler cached mappings when vaddr = paddr. If a driver requests uncached DMA buffer kernel maps it to virtual address so that MMU gets involved and page uncached status takes into account. In that case usage of dma_common_mmap() lead to mapping of vaddr to vaddr for user-space which is obviously wrong. For more detals please refer to verbose explanation here [1]. So here we implement our own version of mmap() which always deals with dma_addr and maps underlying memory to user-space properly (note that DMA buffer mapped to user-space is always uncached because there's no way to properly manage cache from user-space). [1] https://lkml.org/lkml/2016/10/26/973Reviewed-by:
Catalin Marinas <catalin.marinas@arm.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by:
Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by:
Vineet Gupta <vgupta@synopsys.com> Signed-off-by:
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Bjorn Helgaas authored
commit 16d917b1 upstream. If we're using a shadow copy of a PCI device ROM, the shadow copy is in RAM and the device never sees accesses to it and doesn't respond to it. We don't have to route the shadow range to the PCI device, and the device doesn't have to claim the range. Previously we treated the shadow copy as though it were the ROM BAR, and we failed to claim it because the region wasn't routed to the device: pci 0000:01:00.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff] pci_bus 0000:01: Allocating resources pci 0000:01:00.0: can't claim BAR 6 [mem 0x000c0000-0x000dffff]: no compatible bridge window The failure path of pcibios_allocate_dev_rom_resource() cleared out the resource start address, which also caused the following ioremap() warning: WARNING: CPU: 0 PID: 116 at /build/linux-akdJXO/linux-4.8.0/arch/x86/mm/ioremap.c:121 __ioremap_caller+0x1ec/0x370 ioremap on RAM at 0x0000000000000000 - 0x000000000001ffff Handle an option ROM shadow copy as RAM, without trying to insert it into the iomem resource tree. This fixes a regression caused by 0c0e0736 ("PCI: Set ROM shadow location in arch code, not in PCI core"), which appeared in v4.6. The regression causes video device initialization to fail. This was reported on AMD Turks, but it likely affects others as well. Fixes: 0c0e0736 ("PCI: Set ROM shadow location in arch code, not in PCI core") Reported-and-tested-by:
Vecu Bosseur <vecu.bosseur@gmail.com> Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1627496 Link: https://bugzilla.kernel.org/show_bug.cgi?id=175391 Link: https://bugzilla.redhat.com/show_bug.cgi?id=1352272Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Signed-off-by:
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Vineet Gupta authored
commit 922cc171 upstream. The current code doesn't even compile as somehow the inline assembly can't see the register names defined as ARC_RTC_* I'm pretty sure It worked when I first got it merged, but the tools were definitely different then. So better to write this in "C" anyways. Acked-by:
Daniel Lezcano <daniel.lezcano@linaro.org> 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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Andrey Ryabinin authored
commit 70d78fe7 upstream. It could be not possible to freeze coredumping task when it waits for 'core_state->startup' completion, because threads are frozen in get_signal() before they got a chance to complete 'core_state->startup'. Inability to freeze a task during suspend will cause suspend to fail. Also CRIU uses cgroup freezer during dump operation. So with an unfreezable task the CRIU dump will fail because it waits for a transition from 'FREEZING' to 'FROZEN' state which will never happen. Use freezer_do_not_count() to tell freezer to ignore coredumping task while it waits for core_state->startup completion. Link: http://lkml.kernel.org/r/1475225434-3753-1-git-send-email-aryabinin@virtuozzo.comSigned-off-by:
Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by:
Pavel Machek <pavel@ucw.cz> Acked-by:
Oleg Nesterov <oleg@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Tejun Heo <tj@kernel.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Michal Hocko <mhocko@kernel.org> 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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Mike Kravetz authored
commit 96b96a96 upstream. Error paths in hugetlb_cow() and hugetlb_no_page() may free a newly allocated huge page. If a reservation was associated with the huge page, alloc_huge_page() consumed the reservation while allocating. When the newly allocated page is freed in free_huge_page(), it will increment the global reservation count. However, the reservation entry in the reserve map will remain. This is not an issue for shared mappings as the entry in the reserve map indicates a reservation exists. But, an entry in a private mapping reserve map indicates the reservation was consumed and no longer exists. This results in an inconsistency between the reserve map and the global reservation count. This 'leaks' a reserved huge page. Create a new routine restore_reserve_on_error() to restore the reserve entry in these specific error paths. This routine makes use of a new function vma_add_reservation() which will add a reserve entry for a specific address/page. In general, these error paths were rarely (if ever) taken on most architectures. However, powerpc contained arch specific code that that resulted in an extra fault and execution of these error paths on all private mappings. Fixes: 67961f9d ("mm/hugetlb: fix huge page reserve accounting for private mappings) Link: http://lkml.kernel.org/r/1476933077-23091-2-git-send-email-mike.kravetz@oracle.comSigned-off-by:
Mike Kravetz <mike.kravetz@oracle.com> Reported-by:
Jan Stancek <jstancek@redhat.com> Tested-by:
Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by:
Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Kirill A . Shutemov <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by:
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Naoya Horiguchi authored
commit c3901e72 upstream. When memory_failure() runs on a thp tail page after pmd is split, we trigger the following VM_BUG_ON_PAGE(): page:ffffd7cd819b0040 count:0 mapcount:0 mapping: (null) index:0x1 flags: 0x1fffc000400000(hwpoison) page dumped because: VM_BUG_ON_PAGE(!page_count(p)) ------------[ cut here ]------------ kernel BUG at /src/linux-dev/mm/memory-failure.c:1132! memory_failure() passed refcount and page lock from tail page to head page, which is not needed because we can pass any subpage to split_huge_page(). Fixes: 61f5d698 ("mm: re-enable THP") Link: http://lkml.kernel.org/r/1477961577-7183-1-git-send-email-n-horiguchi@ah.jp.nec.comSigned-off-by:
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by:
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Jann Horn authored
commit dd111be6 upstream. When root activates a swap partition whose header has the wrong endianness, nr_badpages elements of badpages are swabbed before nr_badpages has been checked, leading to a buffer overrun of up to 8GB. This normally is not a security issue because it can only be exploited by root (more specifically, a process with CAP_SYS_ADMIN or the ability to modify a swap file/partition), and such a process can already e.g. modify swapped-out memory of any other userspace process on the system. Link: http://lkml.kernel.org/r/1477949533-2509-1-git-send-email-jann@thejh.netSigned-off-by:
Jann Horn <jann@thejh.net> Acked-by:
Kees Cook <keescook@chromium.org> Acked-by:
Jerome Marchand <jmarchan@redhat.com> Acked-by:
Johannes Weiner <hannes@cmpxchg.org> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Hugh Dickins <hughd@google.com> Signed-off-by:
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Hugh Dickins authored
commit 9956edf3 upstream. If shmem_alloc_page() does not set PageLocked and PageSwapBacked, then shmem_replace_page() needs to do so for itself. Without this, it puts newpage on the wrong lru, re-unlocks the unlocked newpage, and system descends into "Bad page" reports and freeze; or if CONFIG_DEBUG_VM=y, it hits an earlier VM_BUG_ON_PAGE(!PageLocked), depending on config. But shmem_replace_page() is not a common path: it's only called when swapin (or swapoff) finds the page was already read into an unsuitable zone: usually all zones are suitable, but gem objects for a few drm devices (gma500, omapdrm, crestline, broadwater) require zone DMA32 if there's more than 4GB of ram. Fixes: 800d8c63 ("shmem: add huge pages support") Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1611062003510.11253@eggly.anvilsSigned-off-by:
Hugh Dickins <hughd@google.com> Acked-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by:
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Vlastimil Babka authored
commit 5e322bee upstream. Christian Borntraeger reports: With commit 8ea1d2a1 ("mm, frontswap: convert frontswap_enabled to static key") kmemleak complains about a memory leak in swapon unreferenced object 0x3e09ba56000 (size 32112640): comm "swapon", pid 7852, jiffies 4294968787 (age 1490.770s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: __vmalloc_node_range+0x194/0x2d8 vzalloc+0x58/0x68 SyS_swapon+0xd60/0x12f8 system_call+0xd6/0x270 Turns out kmemleak is right. We now allocate the frontswap map depending on the kernel config (and no longer on the enablement) swapfile.c: [...] if (IS_ENABLED(CONFIG_FRONTSWAP)) frontswap_map = vzalloc(BITS_TO_LONGS(maxpages) * sizeof(long)); but later on this is passed along --> enable_swap_info(p, prio, swap_map, cluster_info, frontswap_map); and ignored if frontswap is disabled --> frontswap_init(p->type, frontswap_map); static inline void frontswap_init(unsigned type, unsigned long *map) { if (frontswap_enabled()) __frontswap_init(type, map); } Thing is, that frontswap map is never freed. The leakage is relatively not that bad, because swapon is an infrequent and privileged operation. However, if the first frontswap backend is registered after a swap type has been already enabled, it will WARN_ON in frontswap_register_ops() and frontswap will not be available for the swap type. Fix this by making sure the map is assigned by frontswap_init() as long as CONFIG_FRONTSWAP is enabled. Fixes: 8ea1d2a1 ("mm, frontswap: convert frontswap_enabled to static key") Link: http://lkml.kernel.org/r/20161026134220.2566-1-vbabka@suse.czSigned-off-by:
Vlastimil Babka <vbabka@suse.cz> Reported-by:
Christian Borntraeger <borntraeger@de.ibm.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Juergen Gross <jgross@suse.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Signed-off-by:
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Sean Young authored
commit ba13e98f upstream. When receiving a nec repeat, ensure the correct scancode is repeated rather than a random value from the stack. This removes the need for the bogus uninitialized_var() and also fixes the warnings: drivers/media/usb/dvb-usb/dib0700_core.c: In function ‘dib0700_rc_urb_completion’: drivers/media/usb/dvb-usb/dib0700_core.c:679: warning: ‘protocol’ may be used uninitialized in this function [sean addon: So after writing the patch and submitting it, I've bought the hardware on ebay. Without this patch you get random scancodes on nec repeats, which the patch indeed fixes.] Signed-off-by:
Sean Young <sean@mess.org> Tested-by:
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murray foster authored
commit aa5f9209 upstream. Mismatching stream names in DAPM route and widget definitions are causing compilation errors. Fixing these names allows the cs4270 driver to compile and function. [Errors must be at probe time not compile time -- broonie] Signed-off-by:
Murray Foster <mrafoster@gmail.com> Acked-by:
Paul Handrigan <Paul.Handrigan@cirrus.com> Signed-off-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
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Takashi Iwai authored
commit 027a9fe6 upstream. The ALSA proc handler allows currently the write in the unlimited size until kmalloc() fails. But basically the write is supposed to be only for small inputs, mostly for one line inputs, and we don't have to handle too large sizes at all. Since the kmalloc error results in the kernel warning, it's better to limit the size beforehand. This patch adds the limit of 16kB, which must be large enough for the currently existing code. Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Takashi Iwai authored
commit 6809cd68 upstream. Currently the ALSA proc handler allows read or write even if the proc file were write-only or read-only. It's mostly harmless, does thing but allocating memory and ignores the input/output. But it doesn't tell user about the invalid use, and it's confusing and inconsistent in comparison with other proc files. This patch adds some sanity checks and let the proc handler returning an -EIO error when the invalid read/write is performed. Signed-off-by:
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- 15 Nov, 2016 3 commits
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Greg Kroah-Hartman authored
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Sumit Saxena authored
commit 5e5ec175 upstream. This patch will fix regression caused by commit 1e793f6f ("scsi: megaraid_sas: Fix data integrity failure for JBOD (passthrough) devices"). The problem was that the MEGASAS_IS_LOGICAL macro did not have braces and as a result the driver ended up exposing a lot of non-existing SCSI devices (all SCSI commands to channels 1,2,3 were returned as SUCCESS-DID_OK by driver). [mkp: clarified patch description] Fixes: 1e793f6fReported-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
Kashyap Desai <kashyap.desai@broadcom.com> Signed-off-by:
Sumit Saxena <sumit.saxena@broadcom.com> Tested-by:
Tomas Henzl <thenzl@redhat.com> Tested-by:
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Kashyap Desai authored
commit 1e793f6f upstream. Commit 02b01e01 ("megaraid_sas: return sync cache call with success") modified the driver to successfully complete SYNCHRONIZE_CACHE commands without passing them to the controller. Disk drive caches are only explicitly managed by controller firmware when operating in RAID mode. So this commit effectively disabled writeback cache flushing for any drives used in JBOD mode, leading to data integrity failures. [mkp: clarified patch description] Fixes: 02b01e01Signed-off-by:
Hannes Reinecke <hare@suse.com> Reviewed-by:
Ewan D. Milne <emilne@redhat.com> Signed-off-by:
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