** Description changed: On Ubuntu 26.04 with linux-image-7.0.0-29-generic, no out-of-tree kernel module will load. Modules build cleanly and sign correctly, but insmod fails with "Invalid module format" and the kernel logs an invalid relocation target. Reproducer — a six-line module with no dependencies is enough: - mkdir -p ~/hellomod && cd ~/hellomod - printf '#include <linux/module.h>\nstatic int __init h(void){return 0;}\nstatic void __exit b(void){}\nmodule_init(h);\nmodule_exit(b);\nMODULE_LICENSE("GPL");\n' > hello.c - printf 'obj-m += hello.o\n' > Makefile - make -C /lib/modules/$(uname -r)/build M=$PWD modules - sudo /usr/src/linux-headers-$(uname -r)/scripts/sign-file sha256 \ - /var/lib/shim-signed/mok/MOK.priv /var/lib/shim-signed/mok/MOK.der hello.ko - sudo insmod hello.ko + mkdir -p ~/hellomod && cd ~/hellomod + printf '#include <linux/module.h>\nstatic int __init h(void){return 0;}\nstatic void __exit b(void){}\nmodule_init(h);\nmodule_exit(b);\nMODULE_LICENSE("GPL");\n' > hello.c + printf 'obj-m += hello.o\n' > Makefile + make -C /lib/modules/$(uname -r)/build M=$PWD modules + sudo /usr/src/linux-headers-$(uname -r)/scripts/sign-file sha256 \ + /var/lib/shim-signed/mok/MOK.priv /var/lib/shim-signed/mok/MOK.der hello.ko + sudo insmod hello.ko Expected: module loads. Actual: insmod: ERROR: could not insert module hello.ko: Invalid module format dmesg: - module: x86/modules: Invalid relocation target, existing value is - nonzero for sec 41, idx 1, type 1, loc ffffffffc31564d0, val - ffffffffc34c0010 + module: x86/modules: Invalid relocation target, existing value is + nonzero for sec 41, idx 1, type 1, loc ffffffffc31564d0, val + ffffffffc34c0010 readelf identifies the failing section as .gnu.linkonce.this_module. Its relocation section contains only the two standard entries every kernel module has: - Offset Type Symbol - 0x138 R_X86_64_64 init_module + 0 - 0x490 R_X86_64_64 cleanup_module + 0 + Offset Type Symbol + 0x138 R_X86_64_64 init_module + 0 + 0x490 R_X86_64_64 cleanup_module + 0 Environment: - Ubuntu 26.04 LTS - Linux 7.0.0-29-generic #29-Ubuntu SMP PREEMPT_DYNAMIC Fri Jul 17 2026 - Kernel built with gcc 15.2.0 (Ubuntu 15.2.0-16ubuntu1), GNU ld 2.46 - Modules built with the same gcc 15.2.0 — vermagic matches - linux-image, linux-headers and linux-modules are all 7.0.0-29.29, so - there is no version skew between the running kernel and the build - headers - Secure Boot enabled, MOK enrolled, signing verified working (an - unsigned module fails differently, with "Key was rejected by service") - CONFIG_MODULE_COMPRESS_ZSTD=y - CONFIG_MITIGATION_ITS=y, but the CPU reports "Not affected" and booting - with indirect_target_selection=off makes no difference - nvidia on this system is the prebuilt linux-modules-nvidia-595-open - package, built alongside the kernel rather than via DKMS, so it is - not a working out-of-tree counter-example. There are no other DKMS - modules installed to compare against. + Ubuntu 26.04 LTS + Linux 7.0.0-29-generic #29-Ubuntu SMP PREEMPT_DYNAMIC Fri Jul 17 2026 + Kernel built with gcc 15.2.0 (Ubuntu 15.2.0-16ubuntu1), GNU ld 2.46 + Modules built with the same gcc 15.2.0 — vermagic matches + linux-image, linux-headers and linux-modules are all 7.0.0-29.29, so + there is no version skew between the running kernel and the build + headers + Secure Boot enabled, MOK enrolled, signing verified working (an + unsigned module fails differently, with "Key was rejected by service") + CONFIG_MODULE_COMPRESS_ZSTD=y + CONFIG_MITIGATION_ITS=y, but the CPU reports "Not affected" and booting + with indirect_target_selection=off makes no difference + nvidia on this system is the prebuilt linux-modules-nvidia-595-open + package, built alongside the kernel rather than via DKMS, so it is + not a working out-of-tree counter-example. There are no other DKMS + modules installed to compare against. Originally found while trying to load tuxedo-drivers for keyboard backlight control. Reproduced with tuxedo-drivers 4.22.3, tuxedo-drivers 4.21.0 and tuxedo-keyboard 3.2.10 — three releases across two unrelated codebases, all failing identically — which is what led to the minimal reproducer above. Caveat: very small modules do appear to load (tuxedo_compatibility_check, ~12KB, loads fine), so there may be a discriminator I have not identified, and the failure may not be as universal as the reproducer suggests. No earlier kernel is installed on this system, so I have not been able to test whether this is specific to the 7.0.0-29 ABI. + + Regression in 7.0.0-29-generic: out-of-tree modules fail to load with + "Invalid relocation target" on .gnu.linkonce.this_module (works on + 7.0.0-27) + ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-29-generic 7.0.0-29.29 ProcVersionSignature: Ubuntu 7.0.0-29.29-generic 7.0.12 Uname: Linux 7.0.0-29-generic x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC1: matt 5277 F.... wireplumber - /dev/snd/controlC0: matt 5277 F.... wireplumber - /dev/snd/seq: matt 5271 F.... pipewire + USER PID ACCESS COMMAND + /dev/snd/controlC1: matt 5277 F.... wireplumber + /dev/snd/controlC0: matt 5277 F.... wireplumber + /dev/snd/seq: matt 5271 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sat Aug 15 21:42:44 2026 InstallationDate: Installed on 2026-08-15 (0 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) IwDevWlp5s0f0Link: Not connected. Lsusb: - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub - Bus 001 Device 002: ID 1e7d:2c2e ROCCAT Lua Mouse - Bus 001 Device 003: ID 5986:2170 Bison Electronics Inc. BisonCam,NB Pro - Bus 001 Device 004: ID 8087:0036 Intel Corp. BE200 Bluetooth - Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub + Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 001 Device 002: ID 1e7d:2c2e ROCCAT Lua Mouse + Bus 001 Device 003: ID 5986:2170 Bison Electronics Inc. BisonCam,NB Pro + Bus 001 Device 004: ID 8087:0036 Intel Corp. BE200 Bluetooth + Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub MachineType: 3XS Gamer ProcEnviron: - LANG=en_US.UTF-8 - PATH=(custom, no user) - SHELL=/bin/bash - TERM=xterm-256color - XDG_RUNTIME_DIR=<set> + LANG=en_US.UTF-8 + PATH=(custom, no user) + SHELL=/bin/bash + TERM=xterm-256color + XDG_RUNTIME_DIR=<set> ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-29-generic root=UUID=7cabd3ec-7315-40bf-9c08-7a571a4ec64a ro quiet splash indirect_target_selection=off crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/05/2025 dmi.bios.release: 7.8 dmi.bios.vendor: INSYDE Corp. dmi.bios.version: 1.07.08 dmi.board.asset.tag: Tag 12345 dmi.board.name: V3xxSNR dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.ec.firmware.release: 9.5 dmi.modalias: dmi:bvnINSYDECorp.:bvr1.07.08:bd12/05/2025:br7.8:efr9.5:svn3XS:pnGamer:pvrNotApplicable:rvnNotebook:rnV3xxSNR:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A:sku562254:pfaScanComputers: dmi.product.family: Scan Computers dmi.product.name: Gamer dmi.product.sku: 562254 dmi.product.version: Not Applicable dmi.sys.vendor: 3XS -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2163585 Title: No out-of-tree kernel module can load on 7.0.0-29-generic: "Invalid relocation target" on R_X86_64_64 against .gnu.linkonce.this_module Status in linux package in Ubuntu: New Bug description: On Ubuntu 26.04 with linux-image-7.0.0-29-generic, no out-of-tree kernel module will load. Modules build cleanly and sign correctly, but insmod fails with "Invalid module format" and the kernel logs an invalid relocation target. Reproducer — a six-line module with no dependencies is enough: mkdir -p ~/hellomod && cd ~/hellomod printf '#include <linux/module.h>\nstatic int __init h(void){return 0;}\nstatic void __exit b(void){}\nmodule_init(h);\nmodule_exit(b);\nMODULE_LICENSE("GPL");\n' > hello.c printf 'obj-m += hello.o\n' > Makefile make -C /lib/modules/$(uname -r)/build M=$PWD modules sudo /usr/src/linux-headers-$(uname -r)/scripts/sign-file sha256 \ /var/lib/shim-signed/mok/MOK.priv /var/lib/shim-signed/mok/MOK.der hello.ko sudo insmod hello.ko Expected: module loads. Actual: insmod: ERROR: could not insert module hello.ko: Invalid module format dmesg: module: x86/modules: Invalid relocation target, existing value is nonzero for sec 41, idx 1, type 1, loc ffffffffc31564d0, val ffffffffc34c0010 readelf identifies the failing section as .gnu.linkonce.this_module. Its relocation section contains only the two standard entries every kernel module has: Offset Type Symbol 0x138 R_X86_64_64 init_module + 0 0x490 R_X86_64_64 cleanup_module + 0 Environment: Ubuntu 26.04 LTS Linux 7.0.0-29-generic #29-Ubuntu SMP PREEMPT_DYNAMIC Fri Jul 17 2026 Kernel built with gcc 15.2.0 (Ubuntu 15.2.0-16ubuntu1), GNU ld 2.46 Modules built with the same gcc 15.2.0 — vermagic matches linux-image, linux-headers and linux-modules are all 7.0.0-29.29, so there is no version skew between the running kernel and the build headers Secure Boot enabled, MOK enrolled, signing verified working (an unsigned module fails differently, with "Key was rejected by service") CONFIG_MODULE_COMPRESS_ZSTD=y CONFIG_MITIGATION_ITS=y, but the CPU reports "Not affected" and booting with indirect_target_selection=off makes no difference nvidia on this system is the prebuilt linux-modules-nvidia-595-open package, built alongside the kernel rather than via DKMS, so it is not a working out-of-tree counter-example. There are no other DKMS modules installed to compare against. Originally found while trying to load tuxedo-drivers for keyboard backlight control. Reproduced with tuxedo-drivers 4.22.3, tuxedo-drivers 4.21.0 and tuxedo-keyboard 3.2.10 — three releases across two unrelated codebases, all failing identically — which is what led to the minimal reproducer above. Caveat: very small modules do appear to load (tuxedo_compatibility_check, ~12KB, loads fine), so there may be a discriminator I have not identified, and the failure may not be as universal as the reproducer suggests. No earlier kernel is installed on this system, so I have not been able to test whether this is specific to the 7.0.0-29 ABI. Regression in 7.0.0-29-generic: out-of-tree modules fail to load with "Invalid relocation target" on .gnu.linkonce.this_module (works on 7.0.0-27) ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-29-generic 7.0.0-29.29 ProcVersionSignature: Ubuntu 7.0.0-29.29-generic 7.0.12 Uname: Linux 7.0.0-29-generic x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: matt 5277 F.... wireplumber /dev/snd/controlC0: matt 5277 F.... wireplumber /dev/snd/seq: matt 5271 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sat Aug 15 21:42:44 2026 InstallationDate: Installed on 2026-08-15 (0 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) IwDevWlp5s0f0Link: Not connected. Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 1e7d:2c2e ROCCAT Lua Mouse Bus 001 Device 003: ID 5986:2170 Bison Electronics Inc. BisonCam,NB Pro Bus 001 Device 004: ID 8087:0036 Intel Corp. BE200 Bluetooth Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub MachineType: 3XS Gamer ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-29-generic root=UUID=7cabd3ec-7315-40bf-9c08-7a571a4ec64a ro quiet splash indirect_target_selection=off crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/05/2025 dmi.bios.release: 7.8 dmi.bios.vendor: INSYDE Corp. dmi.bios.version: 1.07.08 dmi.board.asset.tag: Tag 12345 dmi.board.name: V3xxSNR dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.ec.firmware.release: 9.5 dmi.modalias: dmi:bvnINSYDECorp.:bvr1.07.08:bd12/05/2025:br7.8:efr9.5:svn3XS:pnGamer:pvrNotApplicable:rvnNotebook:rnV3xxSNR:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A:sku562254:pfaScanComputers: dmi.product.family: Scan Computers dmi.product.name: Gamer dmi.product.sku: 562254 dmi.product.version: Not Applicable dmi.sys.vendor: 3XS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2163585/+subscriptions
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