+ Nathan for the clang weirdness below... On Tue, Sep 02, 2025 at 04:45:12PM +0800, kernel test robot wrote: > > > Hello, > > > this could be a noise, we didn't see the relation between the patch with the > issue we observed. however, we rebuild the kernels for both this commit and > parent 3 times. > ( > our bot chose 894af4a1cde61c as the parent as below > * 19f370d45aceea x86/microcode: Add microcode= cmdline parsing > * 894af4a1cde61c (tip/x86/core, peterz-queue/x86/core) objtool: Validate kCFI calls > ) > > and for each rerun of both this commit and parent, we run more times, but the > issue is still quite persistent while parent keeps clean: > > ========================================================================================= > tbox_group/testcase/rootfs/kconfig/compiler/runtime/group/nr_groups: > vm-snb/trinity/debian-11.1-i386-20220923.cgz/x86_64-randconfig-006-20250826/clang-20/300s/group-01/5 > > 894af4a1cde61c34 19f370d45aceea5ab4c52e3afa0 > ---------------- --------------------------- > fail:runs %reproduction fail:runs > | | | > :200 74% 149:200 last_state.is_incomplete_run > :200 74% 147:200 last_state.running > :200 75% 150:200 dmesg.CFI_failure_at_kobj_attr_show > :200 75% 150:200 dmesg.Kernel_panic-not_syncing:Fatal_exception > :200 75% 150:200 dmesg.Oops:invalid_opcode:#[##]KASAN > :200 75% 150:200 dmesg.RIP:kobj_attr_show > :200 75% 150:200 dmesg.boot_failures > > so we just follow our report rule to still report this results FYI. > > if it's really irrelevant, sorry maybe our env issues (though we still cannot > figure out for now). and if you can help us to figure out the potential problem > from our dmesg in below link, it will be very apprecidated! Yeah, I don't know what you did here but building with that .config, I can't even boot that kernel in a VM because doing: qemu-... -kernel bzImage ... sends me into grub and asks me to select the default kernel. And my qemu script boots arbitrary kernels just fine. Also, I used clang-20 from here: https://mirrors.edge.kernel.org/pub/tools/llvm/ and version 20.1.8 took something like ~10(!) minutes to link vmlinux with that config. Just FYI for Nathan, maybe something's weird there. > below is full report. Leaving it in. > > > kernel test robot noticed "CFI_failure_at_kobj_attr_show" on: > > commit: 19f370d45aceea5ab4c52e3afa00226fb99c3fc8 ("[PATCH -v1 1/2] x86/microcode: Add microcode= cmdline parsing") > url: https://github.com/intel-lab-lkp/linux/commits/Borislav-Petkov/x86-microcode-Add-microcode-cmdline-parsing/20250820-215624 > base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git 894af4a1cde61c3401f237184fb770f72ff12df8 > patch link: https://lore.kernel.org/all/20250820135043.19048-2-bp@xxxxxxxxxx/ > patch subject: [PATCH -v1 1/2] x86/microcode: Add microcode= cmdline parsing > > in testcase: trinity > version: trinity-i386-abe9de86-1_20230429 > with following parameters: > > runtime: 300s > group: group-01 > nr_groups: 5 > > > > config: x86_64-randconfig-006-20250826 > compiler: clang-20 > test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G > > (please refer to attached dmesg/kmsg for entire log/backtrace) > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot <oliver.sang@xxxxxxxxx> > | Closes: https://lore.kernel.org/oe-lkp/202509021646.bc78d9ef-lkp@xxxxxxxxx > > > The kernel config and materials to reproduce are available at: > https://download.01.org/0day-ci/archive/20250902/202509021646.bc78d9ef-lkp@xxxxxxxxx > > > [ 453.382281][ T7761] CFI failure at kobj_attr_show+0x59/0x80 (target: nilfs_feature_revision_show+0x0/0x30; expected type: 0x1b8aae92) > [ 453.386793][ T7761] Oops: invalid opcode: 0000 [#1] KASAN > [ 453.388638][ T7761] CPU: 0 UID: 65534 PID: 7761 Comm: trinity-c2 Not tainted 6.17.0-rc2-00017-g19f370d45ace #1 NONE > [ 453.391831][ T7761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > [ 453.395231][ T7761] RIP: 0010:kobj_attr_show+0x59/0x80 > [ 453.397175][ T7761] Code: 08 00 74 08 4c 89 e7 e8 75 90 d2 fb 4d 8b 1c 24 4d 85 db 74 1f 4c 89 ff 4c 89 f6 48 89 da 41 ba 6e 51 75 e4 45 03 53 f1 74 02 <0f> 0b 2e e8 ef d7 08 00 eb 07 48 c7 c0 fb ff ff ff 5b 41 5c 41 5e > [ 453.403170][ T7761] RSP: 0018:ffffc90002b57a48 EFLAGS: 00010287 > [ 453.405399][ T7761] RAX: 1ffffffff11d2fe9 RBX: ffff8881255ce000 RCX: dffffc0000000000 > [ 453.408012][ T7761] RDX: ffff8881255ce000 RSI: ffffffff88e97f20 RDI: ffff888106a5e250 > [ 453.410593][ T7761] RBP: ffffc90002b57a68 R08: ffff8881255cefff R09: 0000000000000000 > [ 453.413717][ T7761] R10: 0000000082bfb03f R11: ffffffff82621360 R12: ffffffff88e97f48 > [ 453.416820][ T7761] R13: 1ffff110295a3e80 R14: ffffffff88e97f20 R15: ffff888106a5e250 > [ 453.419944][ T7761] FS: 0000000000000000(0000) GS:0000000000000000(0063) knlGS:00000000f7ed7280 > [ 453.422938][ T7761] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 > [ 453.425060][ T7761] CR2: 00000000f7795414 CR3: 000000015b1cc000 CR4: 00000000000406b0 > [ 453.427781][ T7761] Call Trace: > [ 453.429070][ T7761] <TASK> > [ 453.430222][ T7761] sysfs_kf_seq_show+0x2a9/0x390 > [ 453.431885][ T7761] ? __cfi_kobj_attr_show+0x10/0x10 > [ 453.433693][ T7761] kernfs_seq_show+0x107/0x15b > [ 453.435360][ T7761] seq_read_iter+0x55d/0xdeb > [ 453.436971][ T7761] ? kernfs_fop_read_iter+0x14c/0x4a0 > [ 453.438770][ T7761] kernfs_fop_read_iter+0x14c/0x4a0 > [ 453.440385][ T7761] ? __import_iovec+0x31b/0x3db > [ 453.441900][ T7761] do_iter_readv_writev+0x3de/0x590 > [ 453.443609][ T7761] vfs_readv+0x15d/0x3f5 > [ 453.445305][ T7761] ? trace_sys_enter+0x54/0xe5 > [ 453.447044][ T7761] do_readv+0xde/0x190 > [ 453.448551][ T7761] __ia32_sys_readv+0x80/0x90 > [ 453.450192][ T7761] ia32_sys_call+0x2dbd/0x2efb > [ 453.451877][ T7761] __do_fast_syscall_32+0xaa/0x2a5 > [ 453.453640][ T7761] do_fast_syscall_32+0x36/0x8b > [ 453.455342][ T7761] do_SYSENTER_32+0x1f/0x3b > [ 453.456962][ T7761] entry_SYSENTER_compat_after_hwframe+0x78/0x82 > [ 453.459058][ T7761] RIP: 0023:0xf7ede539 > [ 453.460559][ T7761] Code: 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 > [ 453.466394][ T7761] RSP: 002b:00000000ffa4237c EFLAGS: 00000292 ORIG_RAX: 0000000000000091 > [ 453.469176][ T7761] RAX: ffffffffffffffda RBX: 00000000000000f5 RCX: 00000000571a6370 > [ 453.471897][ T7761] RDX: 00000000000000af RSI: 0000000000000013 RDI: 0000000000000002 > [ 453.474598][ T7761] RBP: 00000000201a2903 R08: 0000000000000000 R09: 0000000000000000 > [ 453.477296][ T7761] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > [ 453.479969][ T7761] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > [ 453.482612][ T7761] </TASK> > [ 453.483846][ T7761] Modules linked in: > [ 453.485501][ T7761] ---[ end trace 0000000000000000 ]--- > [ 453.487396][ T7761] RIP: 0010:kobj_attr_show+0x59/0x80 > [ 453.489298][ T7761] Code: 08 00 74 08 4c 89 e7 e8 75 90 d2 fb 4d 8b 1c 24 4d 85 db 74 1f 4c 89 ff 4c 89 f6 48 89 da 41 ba 6e 51 75 e4 45 03 53 f1 74 02 <0f> 0b 2e e8 ef d7 08 00 eb 07 48 c7 c0 fb ff ff ff 5b 41 5c 41 5e > [ 453.495522][ T7761] RSP: 0018:ffffc90002b57a48 EFLAGS: 00010287 > [ 453.497663][ T7761] RAX: 1ffffffff11d2fe9 RBX: ffff8881255ce000 RCX: dffffc0000000000 > [ 453.500363][ T7761] RDX: ffff8881255ce000 RSI: ffffffff88e97f20 RDI: ffff888106a5e250 > [ 453.503133][ T7761] RBP: ffffc90002b57a68 R08: ffff8881255cefff R09: 0000000000000000 > [ 453.505897][ T7761] R10: 0000000082bfb03f R11: ffffffff82621360 R12: ffffffff88e97f48 > [ 453.508738][ T7761] R13: 1ffff110295a3e80 R14: ffffffff88e97f20 R15: ffff888106a5e250 > [ 453.511482][ T7761] FS: 0000000000000000(0000) GS:0000000000000000(0063) knlGS:00000000f7ed7280 > [ 453.514551][ T7761] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 > [ 453.516790][ T7761] CR2: 00000000f7795414 CR3: 000000015b1cc000 CR4: 00000000000406b0 > [ 453.519505][ T7761] Kernel panic - not syncing: Fatal exception > [ 453.521564][ T7761] Kernel Offset: disabled > > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki > -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
