- 30 Oct, 2020 10 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull PNP fix from Rafael Wysocki: "Make function names in kerneldoc comments match the actual names of the functions that they correspond to (Mauro Carvalho Chehab)" * tag 'pnp-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PNP: fix kernel-doc markups
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull device properties framework fixes from Rafael Wysocki: "Fix the secondary firmware node handling while manipulating the primary firmware node for a given device (Andy Shevchenko)" * tag 'devprop-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: device property: Don't clear secondary pointer for shared primary firmware node device property: Keep secondary firmware node secondary by type
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull ACPI fixes from Rafael Wysocki: "These fix three assorted minor issues. Specifics: - Eliminate compiler warning emitted when building the ACPI dock driver (Arnd Bergmann). - Drop lid_init_state quirk for Acer SW5-012 that is not needed any more after recent changes (Hans de Goede). - Fix "missing minus" typo in the NFIT parsing code (Zhang Qilong)" * tag 'acpi-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: button: Drop no longer necessary Acer SW5-012 lid_init_state quirk ACPI: NFIT: Fix comparison to '-ENXIO' ACPI: dock: fix enum-conversion warning -
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull power management fixes from Rafael Wysocki: "These fix a few issues related to running intel_pstate in the passive mode with HWP enabled, correct the handling of the max_cstate module parameter in intel_idle and make a few janitorial changes. Specifics: - Modify Kconfig to prevent configuring either the "conservative" or the "ondemand" governor as the default cpufreq governor if intel_pstate is selected, in which case "schedutil" is the default choice for the default governor setting (Rafael Wysocki). - Modify the cpufreq core, intel_pstate and the schedutil governor to avoid missing updates of the HWP max limit when intel_pstate operates in the passive mode with HWP enabled (Rafael Wysocki). - Fix max_cstate module parameter handling in intel_idle for processor models with C-state tables coming from ACPI (Chen Yu). - Clean up assorted pieces of power management code (Jackie Zamow, Tom Rix, Zhang Qilong)" * tag 'pm-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: schedutil: Always call driver if CPUFREQ_NEED_UPDATE_LIMITS is set cpufreq: Introduce cpufreq_driver_test_flags() cpufreq: speedstep: remove unneeded semicolon PM: sleep: fix typo in kernel/power/process.c intel_idle: Fix max_cstate for processor models without C-state tables cpufreq: intel_pstate: Avoid missing HWP max updates in passive mode cpufreq: Introduce CPUFREQ_NEED_UPDATE_LIMITS driver flag cpufreq: Avoid configuring old governors as default with intel_pstate cpufreq: e_powersaver: remove unreachable break -
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmcLinus Torvalds authored
Pull MMC host fixes from Ulf Hansson: - sdhci: Fix performance regression with auto CMD auto select - sdhci-of-esdhc: Fix initialization for eMMC HS400 mode - sdhci-of-esdhc: Fix timeout bug for tuning commands * tag 'mmc-v5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: sdhci-of-esdhc: make sure delay chain locked for HS400 mmc: sdhci-of-esdhc: set timeout to max before tuning mmc: sdhci: Use Auto CMD Auto Select only when v4_mode is true
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git://anongit.freedesktop.org/drm/drmLinus Torvalds authored
Pull drm fixes from Dave Airlie: "A busier rc2 than normal, have larger sets of fixes for amdgpu + nouveau, along with some i915, docs, core, panel, sun4i, v3d, vc4 fixes. Nothing spooky though or pumpkin related. docs: - kernel doc fixes core: - fix shmem helpers dma-buf mmap bug amdgpu: - Add new navi1x PCI ID - GPUVM reserved area fixes - Misc display fixes - Fix bad interactions between display code and CONFIG_KGDB - Fixes for SMU manual fan control and i2c nouveau: - endian regression fix for old gpus - buffer object refcount fix - uapi start/end alignment fix - display notifier fix - display clock checking fixes i915: - Fix max memory region size calculation - Restore ILK-M RPS support, restoring performance - Reject 90/270 degreerotated initial fbs panel: - mantix reset fixes sun4i: - scalar fix vc4: - hdmi audio fixes v3d: - fix double free" * tag 'drm-fixes-2020-10-30-1' of git://anongit.freedesktop.org/drm/drm: (42 commits) drm/nouveau/kms/nv50-: Fix clock checking algorithm in nv50_dp_mode_valid() drm/nouveau/kms/nv50-: Get rid of bogus nouveau_conn_mode_valid() drm/nouveau/device: fix changing endianess code to work on older GPUs drm/nouveau/gem: fix "refcount_t: underflow; use-after-free" drm/nouveau/kms/nv50-: Program notifier offset before requesting disp caps drm/nouveau/nouveau: fix the start/end range for migration drm/i915: Reject 90/270 degree rotated initial fbs drm/i915: Restore ILK-M RPS support drm/i915/region: fix max size calculation drm/vc4: Rework the structure conversion functions drm/vc4: hdmi: Add a name to the codec DAI component drm/shme-helpers: Fix dma_buf_mmap forwarding bug drm/vc4: hdmi: Avoid sleeping in atomic context drm/amdgpu/pm: fix the fan speed in fan1_input in manual mode for navi1x drm/amd/pm: fix the wrong fan speed in fan1_input drm/amdgpu/swsmu: drop smu i2c bus on navi1x drm/vc4: drv: Add error handding for bind drm: drm_print.h: fix kernel-doc markups drm: kernel-doc: drm_dp_helper.h: fix a typo drm: kernel-doc: add description for a new function parameter ...
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Rafael J. Wysocki authored
* acpi-button: ACPI: button: Drop no longer necessary Acer SW5-012 lid_init_state quirk * acpi-dock: ACPI: dock: fix enum-conversion warning
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Rafael J. Wysocki authored
* pm-cpuidle: intel_idle: Fix max_cstate for processor models without C-state tables * pm-sleep: PM: sleep: fix typo in kernel/power/process.c
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Dave Airlie authored
Merge tag 'drm-intel-fixes-2020-10-29' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes - Fix max memory region size calculation (Matt) - Restore ILK-M RPS support, restoring performance (Ville) - Reject 90/270 degreerotated initial fbs (Ville) Signed-off-by:
Dave Airlie <airlied@redhat.com> From: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201030004442.GA146813@intel.com
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git://github.com/skeggsb/linuxDave Airlie authored
Fixes an endian regression on older GPUs, a refcount overflow, a migration fix and 3 display fixes. Signed-off-by:
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- 29 Oct, 2020 30 commits
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git://anongit.freedesktop.org/drm/drm-miscDave Airlie authored
First round of drm-misc-fixes with a couple of leftovers from drm-misc-fixes next. Some reset fixes for the mantix panel, some fixes for a scaler issue on sun4i, many kernel-doc fixes and various fixes for vc4 (mostly HDMI audio related) Signed-off-by:
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Lyude Paul authored
While I thought I had this correct (since it actually did reject modes like I expected during testing), Ville Syrjala from Intel pointed out that the logic here isn't correct. max_clock refers to the max data rate supported by the DP encoder. So, limiting it to the output of ds_clock (which refers to the maximum dotclock of the downstream DP device) doesn't make any sense. Additionally, since we're using the connector's bpc as the canonical BPC we should use this in mode_valid until we support dynamically setting the bpp based on bandwidth constraints. https://lists.freedesktop.org/archives/dri-devel/2020-September/280276.html For more info. So, let's rewrite this using Ville's advice. v2: * Ville pointed out I mixed up the dotclock and the link rate. So fix that... * ...and also rename all the variables in this function to be more appropriately labeled so I stop mixing them up. * Reuse the bpp from the connector for now until we have dynamic bpp selection. * Use use DIV_ROUND_UP for calculating the mode rate like i915 does, which we should also have been doing from the start Signed-off-by:
Lyude Paul <lyude@redhat.com> Fixes: 409d3813 ("drm/nouveau/kms/nv50-: Use downstream DP clock limits for mode validation") Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Lyude Paul <lyude@redhat.com> Cc: Ben Skeggs <bskeggs@redhat.com> Signed-off-by:
Ben Skeggs <bskeggs@redhat.com>
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Lyude Paul authored
Ville also pointed out that I got a lot of the logic here wrong as well, whoops. While I don't think anyone's likely using 3D output with nouveau, the next patch will make nouveau_conn_mode_valid() make a lot less sense. So, let's just get rid of it and open-code it like before, while taking care to move the 3D frame packing calculations on the dot clock into the right place. Signed-off-by:
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Karol Herbst authored
With this we try to detect if the endianess switch works and assume LE if not. Suggested by Ben. Fixes: 51c05340 ("drm/nouveau/device: detect if changing endianness failed") Signed-off-by:
Karol Herbst <kherbst@redhat.com> Cc: <stable@vger.kernel.org> # v5.8+ Signed-off-by:
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Karol Herbst authored
we can't use nouveau_bo_ref here as no ttm object was allocated and nouveau_bo_ref mainly deals with that. Simply deallocate the object. Signed-off-by:
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Lyude Paul authored
Not entirely sure why this never came up when I originally tested this (maybe some BIOSes already have this setup?) but the ->caps_init vfunc appears to cause the display engine to throw an exception on driver init, at least on my ThinkPad P72: nouveau 0000:01:00.0: disp: chid 0 mthd 008c data 00000000 0000508c 0000102b This is magic nvidia speak for "You need to have the DMA notifier offset programmed before you can call NV507D_GET_CAPABILITIES." So, let's fix this by doing that, and also perform an update afterwards to prevent racing with the GPU when reading capabilities. v2: * Don't just program the DMA notifier offset, make sure to actually perform an update v3: * Don't call UPDATE() * Actually read the correct notifier fields, as apparently the CAPABILITIES_DONE field lives in a different location than the main NV_DISP_CORE_NOTIFIER_1 field. As well, 907d+ use a different CAPABILITIES_DONE field then pre-907d cards. v4: * Don't forget to check the return value of core507d_read_caps() v5: * Get rid of NV50_DISP_CAPS_NTFY[14], use NV50_DISP_CORE_NTFY * Disable notifier after calling GetCapabilities() Signed-off-by:
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Ralph Campbell authored
The user level OpenCL code shouldn't have to align start and end addresses to a page boundary. That is better handled in the nouveau driver. The npages field is also redundant since it can be computed from the start and end addresses. Signed-off-by:
Ralph Campbell <rcampbell@nvidia.com> Signed-off-by:
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Dave Airlie authored
Merge tag 'amd-drm-fixes-5.10-2020-10-29' of git://people.freedesktop.org/~agd5f/linux into drm-fixes amd-drm-fixes-5.10-2020-10-29: amdgpu: - Add new navi1x PCI ID - GPUVM reserved area fixes - Misc display fixes - Fix bad interactions between display code and CONFIG_KGDB - Fixes for SMU manual fan control and i2c Signed-off-by:
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Linus Torvalds authored
Merge tag 'fallthrough-fixes-clang-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux Pull fallthrough fix from Gustavo A. R. Silva: "This fixes a ton of fall-through warnings when building with Clang 12.0.0 and -Wimplicit-fallthrough" * tag 'fallthrough-fixes-clang-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: include: jhash/signal: Fix fall-through warnings for Clang
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from Jakub Kicinski: "Current release regressions: - r8169: fix forced threading conflicting with other shared interrupts; we tried to fix the use of raise_softirq_irqoff from an IRQ handler on RT by forcing hard irqs, but this driver shares legacy PCI IRQs so drop the _irqoff() instead - tipc: fix memory leak caused by a recent syzbot report fix to tipc_buf_append() Current release - bugs in new features: - devlink: Unlock on error in dumpit() and fix some error codes - net/smc: fix null pointer dereference in smc_listen_decline() Previous release - regressions: - tcp: Prevent low rmem stalls with SO_RCVLOWAT. - net: protect tcf_block_unbind with block lock - ibmveth: Fix use of ibmveth in a bridge; the self-imposed filtering to only send legal frames to the hypervisor was too strict - net: hns3: Clear the CMDQ registers before unmapping BAR region; incorrect cleanup order was leading to a crash - bnxt_en - handful of fixes to fixes: - Send HWRM_FUNC_RESET fw command unconditionally, even if there are PCIe errors being reported - Check abort error state in bnxt_open_nic(). - Invoke cancel_delayed_work_sync() for PFs also. - Fix regression in workqueue cleanup logic in bnxt_remove_one(). - mlxsw: Only advertise link modes supported by both driver and device, after removal of 56G support from the driver 56G was not cleared from advertised modes - net/smc: fix suppressed return code Previous release - always broken: - netem: fix zero division in tabledist, caused by integer overflow - bnxt_en: Re-write PCI BARs after PCI fatal error. - cxgb4: set up filter action after rewrites - net: ipa: command payloads already mapped Misc: - s390/ism: fix incorrect system EID, it's okay to change since it was added in current release - vsock: use ns_capable_noaudit() on socket create to suppress false positive audit messages" * tag 'net-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (36 commits) r8169: fix issue with forced threading in combination with shared interrupts netem: fix zero division in tabledist ibmvnic: fix ibmvnic_set_mac mptcp: add missing memory scheduling in the rx path tipc: fix memory leak caused by tipc_buf_append() gtp: fix an use-before-init in gtp_newlink() net: protect tcf_block_unbind with block lock ibmveth: Fix use of ibmveth in a bridge. net/sched: act_mpls: Add softdep on mpls_gso.ko ravb: Fix bit fields checking in ravb_hwtstamp_get() devlink: Unlock on error in dumpit() devlink: Fix some error codes chelsio/chtls: fix memory leaks in CPL handlers chelsio/chtls: fix deadlock issue net: hns3: Clear the CMDQ registers before unmapping BAR region bnxt_en: Send HWRM_FUNC_RESET fw command unconditionally. bnxt_en: Check abort error state in bnxt_open_nic(). bnxt_en: Re-write PCI BARs after PCI fatal error. bnxt_en: Invoke cancel_delayed_work_sync() for PFs also. bnxt_en: Fix regression in workqueue cleanup logic in bnxt_remove_one(). ... -
git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds authored
Pull rdma fixes from Jason Gunthorpe: "The good news is people are testing rc1 in the RDMA world - the bad news is testing of the for-next area is not as good as I had hoped, as we really should have caught at least the rdma_connect_locked() issue before now. Notable merge window regressions that didn't get caught/fixed in time for rc1: - Fix in kernel users of rxe, they were broken by the rapid fix to undo the uABI breakage in rxe from another patch - EFA userspace needs to read the GID table but was broken with the new GID table logic - Fix user triggerable deadlock in mlx5 using devlink reload - Fix deadlock in several ULPs using rdma_connect from the CM handler callbacks - Memory leak in qedr" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: RDMA/qedr: Fix memory leak in iWARP CM RDMA: Add rdma_connect_locked() RDMA/uverbs: Fix false error in query gid IOCTL RDMA/mlx5: Fix devlink deadlock on net namespace deletion RDMA/rxe: Fix small problem in network_type patch -
Heiner Kallweit authored
As reported by Serge flag IRQF_NO_THREAD causes an error if the interrupt is actually shared and the other driver(s) don't have this flag set. This situation can occur if a PCI(e) legacy interrupt is used in combination with forced threading. There's no good way to deal with this properly, therefore we have to remove flag IRQF_NO_THREAD. For fixing the original forced threading issue switch to napi_schedule(). Fixes: 424a646e ("r8169: fix operation under forced interrupt threading") Link: https://www.spinics.net/lists/netdev/msg694960.htmlReported-by:
Serge Belyshev <belyshev@depni.sinp.msu.ru> Signed-off-by:
Heiner Kallweit <hkallweit1@gmail.com> Tested-by:
Jakub Kicinski <kuba@kernel.org>
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Aleksandr Nogikh authored
Currently it is possible to craft a special netlink RTM_NEWQDISC command that can result in jitter being equal to 0x80000000. It is enough to set the 32 bit jitter to 0x02000000 (it will later be multiplied by 2^6) or just set the 64 bit jitter via TCA_NETEM_JITTER64. This causes an overflow during the generation of uniformly distributed numbers in tabledist(), which in turn leads to division by zero (sigma != 0, but sigma * 2 is 0). The related fragment of code needs 32-bit division - see commit 9b0ed89 ("netem: remove unnecessary 64 bit modulus"), so switching to 64 bit is not an option. Fix the issue by keeping the value of jitter within the range that can be adequately handled by tabledist() - [0;INT_MAX]. As negative std deviation makes no sense, take the absolute value of the passed value and cap it at INT_MAX. Inside tabledist(), switch to unsigned 32 bit arithmetic in order to prevent overflows. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:Aleksandr Nogikh <nogikh@google.com> Reported-by: syzbot+ec762a6342ad0d3c0d8f@syzkaller.appspotmail.com Acked-by:
Stephen Hemminger <stephen@networkplumber.org> Link: https://lore.kernel.org/r/20201028170731.1383332-1-aleksandrnogikh@gmail.comSigned-off-by:
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Lijun Pan authored
Jakub Kicinski brought up a concern in ibmvnic_set_mac(). ibmvnic_set_mac() does this: ether_addr_copy(adapter->mac_addr, addr->sa_data); if (adapter->state != VNIC_PROBED) rc = __ibmvnic_set_mac(netdev, addr->sa_data); So if state == VNIC_PROBED, the user can assign an invalid address to adapter->mac_addr, and ibmvnic_set_mac() will still return 0. The fix is to validate ethernet address at the beginning of ibmvnic_set_mac(), and move the ether_addr_copy to the case of "adapter->state != VNIC_PROBED". Fixes: c26eba03 ("ibmvnic: Update reset infrastructure to support tunable parameters") Signed-off-by:
Lijun Pan <ljp@linux.ibm.com> Link: https://lore.kernel.org/r/20201027220456.71450-1-ljp@linux.ibm.comSigned-off-by:
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Paolo Abeni authored
When moving the skbs from the subflow into the msk receive queue, we must schedule there the required amount of memory. Try to borrow the required memory from the subflow, if needed, so that we leverage the existing TCP heuristic. Fixes: 6771bfd9 ("mptcp: update mptcp ack sequence from work queue") Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Reviewed-by:
Mat Martineau <mathew.j.martineau@linux.intel.com> Link: https://lore.kernel.org/r/f6143a6193a083574f11b00dbf7b5ad151bc4ff4.1603810630.git.pabeni@redhat.comSigned-off-by:
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Ville Syrjälä authored
We don't currently handle the initial fb readout correctly for 90/270 degree rotated scanout. Reject it. Cc: stable@vger.kernel.org Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201020194330.28568-1-ville.syrjala@linux.intel.comReviewed-by:
Chris Wilson <chris@chris-wilson.co.uk> (cherry picked from commit a40a8305) Signed-off-by:
Rodrigo Vivi <rodrigo.vivi@intel.com>
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Ville Syrjälä authored
Restore RPS for ILK-M. We lost it when an extra HAS_RPS() check appeared in intel_rps_enable(). Unfortunaltey this just makes the performance worse on my ILK because intel_ips insists on limiting the GPU freq to the minimum. If we don't do the RPS init then intel_ips will not limit the frequency for whatever reason. Either it can't get at some required information and thus makes wrong decisions, or we mess up some weights/etc. and cause it to make the wrong decisions when RPS init has been done, or the entire thing is just wrong. Would require a bunch of reverse engineering to figure out what's going on. Cc: stable@vger.kernel.org Cc: Chris Wilson <chris@chris-wilson.co.uk> Fixes: 9c878557 ("drm/i915/gt: Use the RPM config register to determine clk frequencies") Signed-off-by:
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Matthew Auld authored
We are incorrectly limiting the max allocation size as per the mm max_order, which is effectively the largest power-of-two that we can fit in the region size. However, it's normal to setup the region or allocator with a non-power-of-two size(for example 3G), which we should already handle correctly, except it seems for the early too-big-check. v2: make sure we also exercise the I915_BO_ALLOC_CONTIGUOUS path, which is quite different, since for that we are actually limited by the largest power-of-two that we can fit within the region size. (Chris) Fixes: b908be54 ("drm/i915: support creating LMEM objects") Signed-off-by:
Matthew Auld <matthew.auld@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: CQ Tang <cq.tang@intel.com> Reviewed-by:
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Gustavo A. R. Silva authored
In preparation to enable -Wimplicit-fallthrough for Clang, explicitly add break statements instead of letting the code fall through to the next case. This patch adds four break statements that, together, fix almost 40,000 warnings when building Linux 5.10-rc1 with Clang 12.0.0 and this[1] change reverted. Notice that in order to enable -Wimplicit-fallthrough for Clang, such change[1] is meant to be reverted at some point. So, this patch helps to move in that direction. Something important to mention is that there is currently a discrepancy between GCC and Clang when dealing with switch fall-through to empty case statements or to cases that only contain a break/continue/return statement[2][3][4]. Now that the -Wimplicit-fallthrough option has been globally enabled[5], any compiler should really warn on missing either a fallthrough annotation or any of the other case-terminating statements (break/continue/return/ goto) when falling through to the next case statement. Making exceptions to this introduces variation in case handling which may continue to lead to bugs, misunderstandings, and a general lack of robustness. The point of enabling options like -Wimplicit-fallthrough is to prevent human error and aid developers in spotting bugs before their code is even built/ submitted/committed, therefore eliminating classes of bugs. So, in order to really accomplish this, we should, and can, move in the direction of addressing any error-prone scenarios and get rid of the unintentional fallthrough bug-class in the kernel, entirely, even if there is some minor redundancy. Better to have explicit case-ending statements than continue to have exceptions where one must guess as to the right result. The compiler will eliminate any actual redundancy. [1] commit e2079e93 ("kbuild: Do not enable -Wimplicit-fallthrough for clang for now") [2] https://github.com/ClangBuiltLinux/linux/issues/636 [3] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91432 [4] https://godbolt.org/z/xgkvIh [5] commit a035d552 ("Makefile: Globally enable fall-through warning") Co-developed-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fsLinus Torvalds authored
Pull AFS fixes from David Howells: - Fix copy_file_range() to an afs file now returning EINVAL if the splice_write file op isn't supplied. - Fix a deref-before-check in afs_unuse_cell(). - Fix a use-after-free in afs_xattr_get_acl(). - Fix afs to not try to clear PG_writeback when laundering a page. - Fix afs to take a ref on a page that it sets PG_private on and to drop that ref when clearing PG_private. This is done through recently added helpers. - Fix a page leak if write_begin() fails. - Fix afs_write_begin() to not alter the dirty region info stored in page->private, but rather do this in afs_write_end() instead when we know what we actually changed. - Fix afs_invalidatepage() to alter the dirty region info on a page when partial page invalidation occurs so that we don't inadvertantly include a span of zeros that will get written back if a page gets laundered due to a remote 3rd-party induced invalidation. We mustn't, however, reduce the dirty region if the page has been seen to be mapped (ie. we got called through the page_mkwrite vector) as the page might still be mapped and we might lose data if the file is extended again. - Fix the dirty region info to have a lower resolution if the size of the page is too large for this to be encoded (e.g. powerpc32 with 64K pages). Note that this might not be the ideal way to handle this, since it may allow some leakage of undirtied zero bytes to the server's copy in the case of a 3rd-party conflict. To aid the last two fixes, two additional changes: - Wrap the manipulations of the dirty region info stored in page->private into helper functions. - Alter the encoding of the dirty region so that the region bounds can be stored with one fewer bit, making a bit available for the indication of mappedness. * tag 'afs-fixes-20201029' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: afs: Fix dirty-region encoding on ppc32 with 64K pages afs: Fix afs_invalidatepage to adjust the dirty region afs: Alter dirty range encoding in page->private afs: Wrap page->private manipulations in inline functions afs: Fix where page->private is set during write afs: Fix page leak on afs_write_begin() failure afs: Fix to take ref on page when PG_private is set afs: Fix afs_launder_page to not clear PG_writeback afs: Fix a use after free in afs_xattr_get_acl() afs: Fix tracing deref-before-check afs: Fix copy_file_range()
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Tung Nguyen authored
Commit ed42989e ("tipc: fix the skb_unshare() in tipc_buf_append()") replaced skb_unshare() with skb_copy() to not reduce the data reference counter of the original skb intentionally. This is not the correct way to handle the cloned skb because it causes memory leak in 2 following cases: 1/ Sending multicast messages via broadcast link The original skb list is cloned to the local skb list for local destination. After that, the data reference counter of each skb in the original list has the value of 2. This causes each skb not to be freed after receiving ACK: tipc_link_advance_transmq() { ... /* release skb */ __skb_unlink(skb, &l->transmq); kfree_skb(skb); <-- memory exists after being freed } 2/ Sending multicast messages via replicast link Similar to the above case, each skb cannot be freed after purging the skb list: tipc_mcast_xmit() { ... __skb_queue_purge(pkts); <-- memory exists after being freed } This commit fixes this issue by using skb_unshare() instead. Besides, to avoid use-after-free error reported by KASAN, the pointer to the fragment is set to NULL before calling skb_unshare() to make sure that the original skb is not freed after freeing the fragment 2 times in case skb_unshare() returns NULL. Fixes: ed42989e ("tipc: fix the skb_unshare() in tipc_buf_append()") Acked-by:
Jon Maloy <jmaloy@redhat.com> Reported-by:
Thang Hoang Ngo <thang.h.ngo@dektech.com.au> Signed-off-by:
Tung Nguyen <tung.q.nguyen@dektech.com.au> Reviewed-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Cong Wang <xiyou.wangcong@gmail.com> Link: https://lore.kernel.org/r/20201027032403.1823-1-tung.q.nguyen@dektech.com.auSigned-off-by:
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Masahiro Fujiwara authored
*_pdp_find() from gtp_encap_recv() would trigger a crash when a peer sends GTP packets while creating new GTP device. RIP: 0010:gtp1_pdp_find.isra.0+0x68/0x90 [gtp] <SNIP> Call Trace: <IRQ> gtp_encap_recv+0xc2/0x2e0 [gtp] ? gtp1_pdp_find.isra.0+0x90/0x90 [gtp] udp_queue_rcv_one_skb+0x1fe/0x530 udp_queue_rcv_skb+0x40/0x1b0 udp_unicast_rcv_skb.isra.0+0x78/0x90 __udp4_lib_rcv+0x5af/0xc70 udp_rcv+0x1a/0x20 ip_protocol_deliver_rcu+0xc5/0x1b0 ip_local_deliver_finish+0x48/0x50 ip_local_deliver+0xe5/0xf0 ? ip_protocol_deliver_rcu+0x1b0/0x1b0 gtp_encap_enable() should be called after gtp_hastable_new() otherwise *_pdp_find() will access the uninitialized hash table. Fixes: 1e3a3abd ("gtp: make GTP sockets in gtp_newlink optional") Signed-off-by:
Masahiro Fujiwara <fujiwara.masahiro@gmail.com> Link: https://lore.kernel.org/r/20201027114846.3924-1-fujiwara.masahiro@gmail.comSigned-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4Linus Torvalds authored
Pull ext4 fixes from Ted Ts'o: "Bug fixes for the new ext4 fast commit feature, plus a fix for the 'data=journal' bug fix. Also use the generic casefolding support which has now landed in fs/libfs.c for 5.10" * tag 'ext4_for_linus_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: indicate that fast_commit is available via /sys/fs/ext4/feature/... ext4: use generic casefolding support ext4: do not use extent after put_bh ext4: use IS_ERR() for error checking of path ext4: fix mmap write protection for data=journal mode jbd2: fix a kernel-doc markup ext4: use s_mount_flags instead of s_mount_state for fast commit state ext4: make num of fast commit blocks configurable ext4: properly check for dirty state in ext4_inode_datasync_dirty() ext4: fix double locking in ext4_fc_commit_dentry_updates()
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David Howells authored
The dirty region bounds stored in page->private on an afs page are 15 bits on a 32-bit box and can, at most, represent a range of up to 32K within a 32K page with a resolution of 1 byte. This is a problem for powerpc32 with 64K pages enabled. Further, transparent huge pages may get up to 2M, which will be a problem for the afs filesystem on all 32-bit arches in the future. Fix this by decreasing the resolution. For the moment, a 64K page will have a resolution determined from PAGE_SIZE. In the future, the page will need to be passed in to the helper functions so that the page size can be assessed and the resolution determined dynamically. Note that this might not be the ideal way to handle this, since it may allow some leakage of undirtied zero bytes to the server's copy in the case of a 3rd-party conflict. Fixing that would require a separately allocated record and is a more complicated fix. Fixes: 4343d008 ("afs: Get rid of the afs_writeback record") Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
David Howells <dhowells@redhat.com> Reviewed-by:
Matthew Wilcox (Oracle) <willy@infradead.org>
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David Howells authored
Fix afs_invalidatepage() to adjust the dirty region recorded in page->private when truncating a page. If the dirty region is entirely removed, then the private data is cleared and the page dirty state is cleared. Without this, if the page is truncated and then expanded again by truncate, zeros from the expanded, but no-longer dirty region may get written back to the server if the page gets laundered due to a conflicting 3rd-party write. It mustn't, however, shorten the dirty region of the page if that page is still mmapped and has been marked dirty by afs_page_mkwrite(), so a flag is stored in page->private to record this. Fixes: 4343d008 ("afs: Get rid of the afs_writeback record") Signed-off-by:
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David Howells authored
Currently, page->private on an afs page is used to store the range of dirtied data within the page, where the range includes the lower bound, but excludes the upper bound (e.g. 0-1 is a range covering a single byte). This, however, requires a superfluous bit for the last-byte bound so that on a 4KiB page, it can say 0-4096 to indicate the whole page, the idea being that having both numbers the same would indicate an empty range. This is unnecessary as the PG_private bit is clear if it's an empty range (as is PG_dirty). Alter the way the dirty range is encoded in page->private such that the upper bound is reduced by 1 (e.g. 0-0 is then specified the same single byte range mentioned above). Applying this to both bounds frees up two bits, one of which can be used in a future commit. This allows the afs filesystem to be compiled on ppc32 with 64K pages; without this, the following warnings are seen: ../fs/afs/internal.h: In function 'afs_page_dirty_to': ../fs/afs/internal.h:881:15: warning: right shift count >= width of type [-Wshift-count-overflow] 881 | return (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK; | ^~ ../fs/afs/internal.h: In function 'afs_page_dirty': ../fs/afs/internal.h:886:28: warning: left shift count >= width of type [-Wshift-count-overflow] 886 | return ((unsigned long)to << __AFS_PAGE_PRIV_SHIFT) | from; | ^~ Fixes: 4343d008 ("afs: Get rid of the afs_writeback record") Signed-off-by: -
David Howells authored
The afs filesystem uses page->private to store the dirty range within a page such that in the event of a conflicting 3rd-party write to the server, we write back just the bits that got changed locally. However, there are a couple of problems with this: (1) I need a bit to note if the page might be mapped so that partial invalidation doesn't shrink the range. (2) There aren't necessarily sufficient bits to store the entire range of data altered (say it's a 32-bit system with 64KiB pages or transparent huge pages are in use). So wrap the accesses in inline functions so that future commits can change how this works. Also move them out of the tracing header into the in-directory header. There's not really any need for them to be in the tracing header. Signed-off-by: -
David Howells authored
In afs, page->private is set to indicate the dirty region of a page. This is done in afs_write_begin(), but that can't take account of whether the copy into the page actually worked. Fix this by moving the change of page->private into afs_write_end(). Fixes: 4343d008 ("afs: Get rid of the afs_writeback record") Signed-off-by:
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David Howells authored
Fix the leak of the target page in afs_write_begin() when it fails. Fixes: 15b4650e ("afs: convert to new aops") Signed-off-by:
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David Howells authored
Fix afs to take a ref on a page when it sets PG_private on it and to drop the ref when removing the flag. Note that in afs_write_begin(), a lot of the time, PG_private is already set on a page to which we're going to add some data. In such a case, we leave the bit set and mustn't increment the page count. As suggested by Matthew Wilcox, use attach/detach_page_private() where possible. Fixes: 31143d5d ("AFS: implement basic file write support") Reported-by:
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