[Bug 1783746] Re: ipmmu is always registered
** Changed in: linux (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
This bug was fixed in the package linux - 4.15.0-38.41 --- linux (4.15.0-38.41) bionic; urgency=medium * linux: 4.15.0-38.41 -proposed tracker (LP: #1797061) * Silent data corruption in Linux kernel 4.15 (LP: #1796542) - block: add a lower-level bio_add_page interface - block: bio_iov_iter_get_pages: fix size of last iovec - blkdev: __blkdev_direct_IO_simple: fix leak in error case - block: bio_iov_iter_get_pages: pin more pages for multi-segment IOs linux (4.15.0-37.40) bionic; urgency=medium * linux: 4.15.0-37.40 -proposed tracker (LP: #1795564) * hns3: enable ethtool rx-vlan-filter on supported hw (LP: #1793394) - net: hns3: Add vlan filter setting by ethtool command -K * hns3: Modifying channel parameters will reset ring parameters back to defaults (LP: #1793404) - net: hns3: Fix desc num set to default when setting channel * hisi_sas: Add SATA FIX check for v3 hw (LP: #1794151) - scsi: hisi_sas: Add SATA FIS check for v3 hw * Fix potential corruption using SAS controller on HiSilicon arm64 boards (LP: #1794156) - scsi: hisi_sas: add memory barrier in task delivery function * hisi_sas: Reduce unnecessary spin lock contention (LP: #1794165) - scsi: hisi_sas: Tidy hisi_sas_task_prep() * Add functional level reset support for the SAS controller on HiSilicon D06 systems (LP: #1794166) - scsi: hisi_sas: tidy host controller reset function a bit - scsi: hisi_sas: relocate some common code for v3 hw - scsi: hisi_sas: Implement handlers of PCIe FLR for v3 hw * HiSilicon SAS controller doesn't recover from PHY STP link timeout (LP: #1794172) - scsi: hisi_sas: tidy channel interrupt handler for v3 hw - scsi: hisi_sas: Fix the failure of recovering PHY from STP link timeout * getxattr: always handle namespaced attributes (LP: #1789746) - getxattr: use correct xattr length * Fix unusable NVIDIA GPU after S3 (LP: #1793338) - PCI: Reprogram bridge prefetch registers on resume * Fails to boot under Xen PV: BUG: unable to handle kernel paging request at edc21fd9 (LP: #1789118) - x86/EISA: Don't probe EISA bus for Xen PV guests * qeth: use vzalloc for QUERY OAT buffer (LP: #1793086) - s390/qeth: use vzalloc for QUERY OAT buffer * SRU: Enable middle button of touchpad on ThinkPad P72 (LP: #1793463) - Input: elantech - enable middle button of touchpad on ThinkPad P72 * Dell new AIO requires a new uart backlight driver (LP: #1727235) - SAUCE: platform/x86: dell-uart-backlight: new backlight driver for DELL AIO - updateconfigs for Dell UART backlight driver * [Ubuntu] s390/crypto: Fix return code checking in cbc_paes_crypt. (LP: #1794294) - s390/crypto: Fix return code checking in cbc_paes_crypt() * hns3: Retrieve RoCE MSI-X config from firmware (LP: #1793221) - net: hns3: Fix MSIX allocation issue for VF - net: hns3: Refine the MSIX allocation for PF * net: hns: Avoid hang when link is changed while handling packets (LP: #1792209) - net: hns: add the code for cleaning pkt in chip - net: hns: add netif_carrier_off before change speed and duplex * Page leaking in cachefiles_read_backing_file while vmscan is active (LP: #1793430) - SAUCE: cachefiles: Page leaking in cachefiles_read_backing_file while vmscan is active * some nvidia p1000 graphic cards hang during the boot (LP: #1791569) - drm/nouveau/gr/gf100-: virtualise tpc_mask + apply fixes from traces * Error reported when creating ZFS pool with "-t" option, despite successful pool creation (LP: #1769937) - SAUCE: (noup) Update zfs to 0.7.5-1ubuntu16.4 * Fix I2C touchpanels' interrupt storms after system suspend (LP: #1792309) - HID: i2c-hid: Fix flooded incomplete report after S3 on Rayd touchscreen - HID: i2c-hid: Don't reset device upon system resume * ipmmu is always registered (LP: #1783746) - iommu/ipmmu-vmsa: Don't register as BUS IOMMU if machine doesn't have IPMMU- VMSA * Bionic update: upstream stable patchset 2018-09-27 (LP: #1794889) - clocksource/drivers/imx-tpm: Correct some registers operation flow - Input: synaptics-rmi4 - fix an unchecked out of memory error path - KVM: X86: fix incorrect reference of trace_kvm_pi_irte_update - x86: Add check for APIC access address for vmentry of L2 guests - MIPS: io: Prevent compiler reordering writeX() - nfp: ignore signals when communicating with management FW - perf report: Fix switching to another perf.data file - fsnotify: fix ignore mask logic in send_to_group() - MIPS: io: Add barrier after register read in readX() - s390/smsgiucv: disable SMSG on module unload - isofs: fix potential memory leak in mount option parsing - MIPS: dts: Boston: Fix PCI bus dtc warnings: - spi: sh-msiof: Fix bit field overflow writes to TSCR/RSCR - doc: Add vendor prefix for Kieback & Peter GmbH - dt-bindings:
[Bug 1783746] Re: ipmmu is always registered
** Tags removed: verification-needed-bionic ** Tags added: verification-done-bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- bionic' to 'verification-done-bionic'. If the problem still exists, change the tag 'verification-needed-bionic' to 'verification-failed- bionic'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
** Changed in: linux (Ubuntu Bionic) Status: New => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
** Description changed: + [Impact] + + The ipmmu-vmsa driver registers itself to the system via an initcall() + to ipmmu_init(), and in case it's the first (or the only) iommu driver, + it registers its iommu ops to the platform bus - in the tegra2 case, + there's no iommu hardware, so all drivers bail out, except for the + ipmmu-vmsa. + + Later on, during boot, when the Tegra host1x is probing + (drivers/gpu/host1x/dev.c::host1x_probe()), it checks if an iommu device + is present (drivers/iommu/iommu.c::iommu_present() that does so by + identifying if any iommu ops were registered) and attach to the + supposedly present device, incurring in a null pointer dereference. + + Upstream quickly acknowledged the problem, and rolled a patch to + restrict the ipmmu-vmsa driver to register if and only if a compatible + device is present. + + The fix appared initially in 4.19, and was later backported via stable + to 4.18.x, and this is a clean cherry pick of that commit. + + [Fix] + + Apply the attached patch and recompile. + + [How to test] + + Try to boot a patched kernel on a Tegra2 board. + + [Regession potential] + + None, the fix is trivial. + + -- + + Original bug: + Hi, booting the bionic kernel (4.15.0-29-generic) on my Tegra20 device (no iommu), I found it crashes during display driver setup. The bootlog (and crash) is attached. Asking on Tegra IRC channel, digetx found that this is caused by the IPMMU-VMSA driver which is always registered via initcall. Adding "initcall_blacklist=ipmmu_init" to the kernel parameters makes it boot fine. Maybe this buggy driver should be disabled in the config (or fixed somehow)? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
The patch looks good, but i'll have to wait until it's pulled into Linus tree. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
** Changed in: linux (Ubuntu) Assignee: (unassigned) => Paolo Pisati (p-pisati) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
It is possible that it didn't show up in older kernels (4.4 for X) because Tegra didn't used the IOMMU at that time. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
It started after upgrade from X to B. This may only show up on Tegra2, which does not have an IOMMU, and which creates problems if one is registered. Sorry, I don't understand the technical details. AFAICT, the whole driver is still broken in mainline kernel (since 3.20). An upstream fixed is currently proposed. See: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git/commit/?h=next=5c5c87411488af3cd082221e567498d813d0fe83 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem? Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.18 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.18-rc6 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1783746] Re: ipmmu is always registered
** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783746 Title: ipmmu is always registered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783746/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
