Greeting, FYI, we noticed the following commit (built with gcc-9): commit: d4c6399900364facd84c9e35ce1540b6046c345f ("vmlinux.lds.h: Avoid orphan section with !SMP") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: trinity version: trinity-x86_64-03f10b67-1_20210401 with following parameters: runtime: 300s test-description: Trinity is a linux system call fuzz tester. test-url: http://codemonkey.org.uk/projects/trinity/ on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 103.254262] BUG: unable to handle page fault for address: ffffffffbb443040 [ 103.255486] #PF: supervisor write access in kernel mode [ 103.256427] #PF: error_code(0x0002) - not-present page [ 103.257362] PGD 2cec37067 P4D 2cec37067 PUD 2cec38063 PMD 100235063 PTE 800ffffd2f9bc062 [ 103.258757] Oops: 0002 [#1] KASAN PTI [ 103.259355] CPU: 0 PID: 1 Comm: swapper Not tainted 5.13.0-rc2+ #1 [ 103.260390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 103.261811] RIP: 0010:kvm_guest_apic_eoi_write+0x12/0x90 [ 103.262740] Code: 00 48 c7 c7 28 8d b1 ba e8 2b b5 60 00 eb cc 66 0f 1f 84 00 00 00 00 00 53 be 08 00 00 00 48 c7 c7 40 30 44 bb e8 ee b8 60 00 <48> 0f ba 35 95 d0 59 05 00 72 4e 48 c7 c0 80 fc 7f b9 48 ba 00 00 [ 103.265736] RSP: 0018:ffffc90000007fc8 EFLAGS: 00010046 [ 103.266640] RAX: 0000000000000001 RBX: ffffffffb97ffa40 RCX: ffffffffb5ea5fa2 [ 103.267869] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffffbb443040 [ 103.269087] RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff7688609 [ 103.270329] R10: ffffffffbb443047 R11: fffffbfff7688608 R12: 0000000000000000 [ 103.271490] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 103.272646] FS: 0000000000000000(0000) GS:ffffffffb9a7f000(0000) knlGS:0000000000000000 [ 103.273993] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.274963] CR2: ffffffffbb443040 CR3: 00000002cec34000 CR4: 00000000000406b0 [ 103.276150] Call Trace: [ 103.276564] [ 103.276913] __sysvec_apic_timer_interrupt+0x62/0x370 [ 103.277781] sysvec_apic_timer_interrupt+0x62/0x80 [ 103.278602] [ 103.278984] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 103.279890] RIP: 0010:call_rcu+0xc/0x150 [ 103.280559] Code: c7 c7 e0 db 05 ba e8 d3 23 33 02 85 c0 75 cc eb 9f 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 b8 00 00 00 00 00 fc ff df 55 53 <48> 89 fb 48 83 c7 08 48 89 fa 48 c1 ea 03 48 83 ec 08 80 3c 02 00 [ 103.283542] RSP: 0018:ffffc9000001fdb8 EFLAGS: 00000246 [ 103.284404] RAX: dffffc0000000000 RBX: fffff52000003fc6 RCX: 1ffffffff75653d5 [ 103.285532] RDX: 1ffff92000003fdd RSI: ffffffffb60b1810 RDI: ffffc9000001fe80 [ 103.286712] RBP: ffffc9000001fe80 R08: ffffc9000001fe60 R09: 0000000000000000 [ 103.287888] R10: 0000000000000001 R11: ffffc9000001fe90 R12: ffffc9000001fe60 [ 103.289058] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 [ 103.290290] ? rcu_tasks_pregp_step+0x10/0x10 [ 103.291029] __wait_rcu_gp+0x160/0x440 [ 103.291650] rcu_barrier+0x83/0xc0 [ 103.292234] ? poll_state_synchronize_rcu+0x10/0x10 [ 103.293040] ? synchronize_rcu+0x80/0x80 [ 103.293720] ? lockdep_hardirqs_on_prepare+0x26b/0x3e0 [ 103.294554] ? trace_hardirqs_on+0x3d/0x1d0 [ 103.295279] ? _vdso_data+0xf80/0xf80 [ 103.295919] ? _vdso_data+0xf80/0xf80 [ 103.296525] ? free_kernel_image_pages+0xd/0x30 [ 103.297307] ? rest_init+0x18e/0x18e [ 103.297937] kernel_init+0x20/0x112 [ 103.298537] ret_from_fork+0x22/0x30 [ 103.299197] Modules linked in: [ 103.299740] CR2: ffffffffbb443040 [ 103.300304] ---[ end trace 733607da50d3f759 ]--- To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k job-script # job-script is attached in this email --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang