Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 08cb589cb3d2dd9029191135b52ef229e8dcd7ae ("mm/debug_vm_pgtable: introduce struct pgtable_debug_args") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: boot on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +----------------------------------------------------------------------+------------+------------+ | | 35c5405269 | 08cb589cb3 | +----------------------------------------------------------------------+------------+------------+ | boot_successes | 20 | 0 | | boot_failures | 0 | 18 | | BUG:sleeping_function_called_from_invalid_context_at_mm/page_alloc.c | 0 | 18 | | initcall_debug_vm_pgtable_returned_with_preemption_imbalance | 0 | 18 | | WARNING:at_init/main.c:#do_one_initcall | 0 | 18 | | EIP:do_one_initcall | 0 | 18 | | Kernel_panic-not_syncing:No_working_init_found | 0 | 18 | +----------------------------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 9.433105][ T1] BUG: sleeping function called from invalid context at mm/page_alloc.c:5170 [ 9.434513][ T1] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1, name: swapper/0 [ 9.436116][ T1] no locks held by swapper/0/1. [ 9.436923][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.14.0-rc4-00161-g08cb589cb3d2 #1 [ 9.438398][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 9.439880][ T1] Call Trace: [ 9.440404][ T1] ? dump_stack_lvl (lib/dump_stack.c:106) [ 9.441154][ T1] ? dump_stack (lib/dump_stack.c:113) [ 9.441827][ T1] ? ___might_sleep.cold (kernel/sched/core.c:9155) [ 9.442645][ T1] ? __might_sleep (kernel/sched/core.c:9109 (discriminator 14)) [ 9.444795][ T1] ? __alloc_pages (include/linux/kernel.h:104 mm/page_alloc.c:5170 mm/page_alloc.c:5380) [ 9.445583][ T1] ? mem_encrypt_init+0x1/0x1 [ 9.446389][ T1] ? destroy_args (mm/debug_vm_pgtable.c:1219) [ 9.447193][ T1] ? debug_vm_pgtable (mm/debug_vm_pgtable.c:1208 mm/debug_vm_pgtable.c:1237) [ 9.448076][ T1] ? destroy_args (mm/debug_vm_pgtable.c:1219) [ 9.448863][ T1] ? do_one_initcall (init/main.c:1282) [ 9.449676][ T1] ? parse_args (kernel/params.c:190) [ 9.450470][ T1] ? kernel_init_freeable (init/main.c:1354 init/main.c:1371 init/main.c:1390 init/main.c:1592) [ 9.451358][ T1] ? rest_init (init/main.c:1476) [ 9.452063][ T1] ? kernel_init (init/main.c:1486) [ 9.452759][ T1] ? ret_from_fork (arch/x86/entry/entry_32.S:775) [ 9.453815][ T1] ------------[ cut here ]------------ [ 9.454758][ T1] initcall debug_vm_pgtable+0x0/0x77f returned with preemption imbalance [ 9.456186][ T1] WARNING: CPU: 1 PID: 1 at init/main.c:1295 do_one_initcall (init/main.c:1295 (discriminator 1)) [ 9.457445][ T1] Modules linked in: [ 9.458090][ T1] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 5.14.0-rc4-00161-g08cb589cb3d2 #1 [ 9.459706][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 9.461171][ T1] EIP: do_one_initcall (init/main.c:1295 (discriminator 1)) [ 9.462000][ T1] Code: 50 82 c4 41 c6 05 e4 18 21 42 01 e8 30 5e 8a 00 e9 4b ff ff ff 8d b6 00 00 00 00 8d 45 b0 50 56 68 94 85 c4 41 e8 a0 2b 8a 00 <0f> 0b 83 c4 0c e9 3b fe ff ff 8d b4 26 00 00 00 00 0f 0b e9 c4 fd All code ======== 0: 50 push %rax 1: 82 (bad) 2: c4 41 c6 05 (bad) 6: e4 18 in $0x18,%al 8: 21 42 01 and %eax,0x1(%rdx) b: e8 30 5e 8a 00 callq 0x8a5e40 10: e9 4b ff ff ff jmpq 0xffffffffffffff60 15: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi 1b: 8d 45 b0 lea -0x50(%rbp),%eax 1e: 50 push %rax 1f: 56 push %rsi 20: 68 94 85 c4 41 pushq $0x41c48594 25: e8 a0 2b 8a 00 callq 0x8a2bca 2a:* 0f 0b ud2 <-- trapping instruction 2c: 83 c4 0c add $0xc,%esp 2f: e9 3b fe ff ff jmpq 0xfffffffffffffe6f 34: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 3b: 0f 0b ud2 3d: e9 .byte 0xe9 3e: c4 .byte 0xc4 3f: fd std Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 83 c4 0c add $0xc,%esp 5: e9 3b fe ff ff jmpq 0xfffffffffffffe45 a: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 11: 0f 0b ud2 13: e9 .byte 0xe9 14: c4 .byte 0xc4 15: fd std [ 9.465300][ T1] EAX: 00000047 EBX: 00000000 ECX: 00000000 EDX: 00000000 [ 9.466578][ T1] ESI: 4227f12d EDI: 00000000 EBP: 4308bf80 ESP: 4308bf24 [ 9.467690][ T1] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 9.468863][ T1] CR0: 80050033 CR2: 00000000 CR3: 02452000 CR4: 000006d0 [ 9.469987][ T1] Call Trace: [ 9.470526][ T1] ? destroy_args (mm/debug_vm_pgtable.c:1219) [ 9.471286][ T1] ? kernel_init_freeable (init/main.c:1354 init/main.c:1371 init/main.c:1390 init/main.c:1592) [ 9.472186][ T1] ? rest_init (init/main.c:1476) [ 9.472928][ T1] ? kernel_init (init/main.c:1486) [ 9.473670][ T1] ? ret_from_fork (arch/x86/entry/entry_32.S:775) [ 9.474474][ T1] irq event stamp: 691587 [ 9.475423][ T1] hardirqs last enabled at (691599): finish_task_switch (arch/x86/include/asm/irqflags.h:45 arch/x86/include/asm/irqflags.h:80 kernel/sched/sched.h:1319 kernel/sched/core.c:4437 kernel/sched/core.c:4555) [ 9.476972][ T1] hardirqs last disabled at (691606): console_unlock (kernel/printk/printk.c:2589 (discriminator 1)) [ 9.478454][ T1] softirqs last enabled at (691504): __do_softirq (arch/x86/include/asm/preempt.h:27 kernel/softirq.c:402 kernel/softirq.c:587) [ 9.483939][ T1] softirqs last disabled at (691471): do_softirq_own_stack (arch/x86/kernel/irq_32.c:60 arch/x86/kernel/irq_32.c:149) [ 9.485605][ T1] ---[ end trace 3b56d1453479e08a ]--- [ 9.486758][ T1] Key type ._fscrypt registered [ 9.487526][ T1] Key type .fscrypt registered [ 9.488258][ T1] Key type fscrypt-provisioning registered [ 9.489550][ T1] fs-verity: Initialized fs-verity [ 9.493326][ T1] RAS: Correctable Errors collector initialized. [ 9.515841][ T83] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX [ 9.525083][ T83] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 9.558690][ T1] Sending DHCP requests ., OK [ 9.596038][ T1] IP-Config: Got DHCP answer from 10.0.2.2, my address is 10.0.2.15 [ 9.597328][ T1] IP-Config: Complete: [ 9.598008][ T1] device=eth0, hwaddr=52:54:00:12:34:56, ipaddr=10.0.2.15, mask=255.255.255.0, gw=10.0.2.2 [ 9.599711][ T1] host=vm-snb-i386-39, domain=, nis-domain=(none) [ 9.600844][ T1] bootserver=10.0.2.2, rootserver=10.0.2.2, rootpath= [ 9.600851][ T1] nameserver0=10.0.2.3 [ 9.608935][ T1] Freeing unused kernel image (initmem) memory: 1980K [ 9.645491][ T1] Write protecting kernel text and read-only data: 13960k [ 9.646776][ T1] rodata_test: all tests were successful [ 9.685428][ T1] Run /init as init process [ 9.686248][ T1] with arguments: [ 9.686919][ T1] /init [ 9.687400][ T1] with environment: [ 9.688043][ T1] HOME=/ [ 9.688564][ T1] TERM=linux [ 9.689125][ T1] user=lkp [ 9.689639][ T1] job=/lkp/jobs/scheduled/vm-snb-i386-39/boot-300-quantal-i386-core-20190426.cgz-08cb589cb3d2dd9029191135b52ef229e8dcd7ae-20210808-22832-1nqlo1e-0.yaml [ 9.692088][ T1] ARCH=i386 [ 9.692653][ T1] kconfig=i386-randconfig-a014-20210804 [ 9.693604][ T1] branch=linux-devel/devel-catchup-20210807-115448 [ 9.694715][ T1] commit=08cb589cb3d2dd9029191135b52ef229e8dcd7ae [ 9.696167][ T1] BOOT_IMAGE=/pkg/linux/i386-randconfig-a014-20210804/gcc-9/08cb589cb3d2dd9029191135b52ef229e8dcd7ae/vmlinuz-5.14.0-rc4-00161-g08cb589cb3d2 [ 9.698710][ T1] max_uptime=600 [ 9.699390][ T1] RESULT_ROOT=/result/boot/300/vm-snb-i386/quantal-i386-core-20190426.cgz/i386-randconfig-a014-20210804/gcc-9/08cb589cb3d2dd9029191135b52ef229e8dcd7ae/3 [ 9.702014][ T1] LKP_SERVER=internal-lkp-server [ 9.711118][ T1] selinux=0 [ 9.711695][ T1] softlockup_panic=1 [ 9.712361][ T1] prompt_ramdisk=0 [ 9.713011][ T1] vga=normal [ 9.714007][ T1] Failed to execute /init (error -14) [ 9.715082][ T1] Run /sbin/init as init process [ 9.715954][ T1] with arguments: [ 9.716630][ T1] /sbin/init [ 9.717250][ T1] with environment: [ 9.717992][ T1] HOME=/ [ 9.718561][ T1] TERM=linux [ 9.719146][ T1] user=lkp [ 9.719691][ T1] job=/lkp/jobs/scheduled/vm-snb-i386-39/boot-300-quantal-i386-core-20190426.cgz-08cb589cb3d2dd9029191135b52ef229e8dcd7ae-20210808-22832-1nqlo1e-0.yaml [ 9.722176][ T1] ARCH=i386 [ 9.722731][ T1] kconfig=i386-randconfig-a014-20210804 [ 9.723691][ T1] branch=linux-devel/devel-catchup-20210807-115448 [ 9.724867][ T1] commit=08cb589cb3d2dd9029191135b52ef229e8dcd7ae [ 9.726373][ T1] BOOT_IMAGE=/pkg/linux/i386-randconfig-a014-20210804/gcc-9/08cb589cb3d2dd9029191135b52ef229e8dcd7ae/vmlinuz-5.14.0-rc4-00161-g08cb589cb3d2 [ 9.728994][ T1] max_uptime=600 [ 9.729657][ T1] RESULT_ROOT=/result/boot/300/vm-snb-i386/quantal-i386-core-20190426.cgz/i386-randconfig-a014-20210804/gcc-9/08cb589cb3d2dd9029191135b52ef229e8dcd7ae/3 [ 9.732482][ T1] LKP_SERVER=internal-lkp-server [ 9.733399][ T1] selinux=0 [ 9.733996][ T1] softlockup_panic=1 [ 9.734732][ T1] prompt_ramdisk=0 [ 9.735457][ T1] vga=normal [ 9.736394][ T1] Starting init: /sbin/init exists but couldn't execute it (error -14) [ 9.737739][ T1] Run /etc/init as init process [ 9.738543][ T1] with arguments: [ 9.739148][ T1] /etc/init [ 9.739701][ T1] with environment: [ 9.740337][ T1] HOME=/ [ 9.740855][ T1] TERM=linux [ 9.741433][ T1] user=lkp [ 9.741970][ T1] job=/lkp/jobs/scheduled/vm-snb-i386-39/boot-300-quantal-i386-core-20190426.cgz-08cb589cb3d2dd9029191135b52ef229e8dcd7ae-20210808-22832-1nqlo1e-0.yaml [ 9.744425][ T1] ARCH=i386 [ 9.745124][ T1] kconfig=i386-randconfig-a014-20210804 [ 9.746079][ T1] branch=linux-devel/devel-catchup-20210807-115448 [ 9.747230][ T1] commit=08cb589cb3d2dd9029191135b52ef229e8dcd7ae [ 9.748302][ T1] BOOT_IMAGE=/pkg/linux/i386-randconfig-a014-20210804/gcc-9/08cb589cb3d2dd9029191135b52ef229e8dcd7ae/vmlinuz-5.14.0-rc4-00161-g08cb589cb3d2 [ 9.750873][ T1] max_uptime=600 [ 9.751480][ T1] RESULT_ROOT=/result/boot/300/vm-snb-i386/quantal-i386-core-20190426.cgz/i386-randconfig-a014-20210804/gcc-9/08cb589cb3d2dd9029191135b52ef229e8dcd7ae/3 [ 9.753917][ T1] LKP_SERVER=internal-lkp-server [ 9.754729][ T1] selinux=0 [ 9.755430][ T1] softlockup_panic=1 [ 9.756144][ T1] prompt_ramdisk=0 [ 9.756800][ T1] vga=normal [ 9.757516][ T1] Starting init: /etc/init exists but couldn't execute it (error -13) [ 9.758892][ T1] Run /bin/init as init process [ 9.759623][ T1] with arguments: [ 9.760214][ T1] /bin/init [ 9.760786][ T1] with environment: [ 9.761438][ T1] HOME=/ [ 9.761950][ T1] TERM=linux [ 9.762520][ T1] user=lkp [ 9.763099][ T1] job=/lkp/jobs/scheduled/vm-snb-i386-39/boot-300-quantal-i386-core-20190426.cgz-08cb589cb3d2dd9029191135b52ef229e8dcd7ae-20210808-22832-1nqlo1e-0.yaml [ 9.765918][ T1] ARCH=i386 [ 9.766460][ T1] kconfig=i386-randconfig-a014-20210804 [ 9.767445][ T1] branch=linux-devel/devel-catchup-20210807-115448 [ 9.768522][ T1] commit=08cb589cb3d2dd9029191135b52ef229e8dcd7ae [ 9.769590][ T1] BOOT_IMAGE=/pkg/linux/i386-randconfig-a014-20210804/gcc-9/08cb589cb3d2dd9029191135b52ef229e8dcd7ae/vmlinuz-5.14.0-rc4-00161-g08cb589cb3d2 [ 9.771938][ T1] max_uptime=600 [ 9.772617][ T1] RESULT_ROOT=/result/boot/300/vm-snb-i386/quantal-i386-core-20190426.cgz/i386-randconfig-a014-20210804/gcc-9/08cb589cb3d2dd9029191135b52ef229e8dcd7ae/3 [ 9.775497][ T1] LKP_SERVER=internal-lkp-server To reproduce: # build kernel cd linux cp config-5.14.0-rc4-00161-g08cb589cb3d2 .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare modules_prepare bzImage 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