FYI, we noticed the following commit (built with gcc-7): commit: f241bb1f42aa95a996c0c6ec8ff38e4306ec0281 ("IMA: support for per policy rule template formats") https://git.kernel.org/cgit/linux/kernel/git/zohar/linux-integrity.git next-queued-testing in testcase: rcutorture with following parameters: runtime: 300s test: default torture_type: srcud test-description: rcutorture is rcutorture kernel module load/unload test. test-url: https://www.kernel.org/doc/Documentation/RCU/torture.txt on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 2G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +----------------------------------------------------------------+------------+------------+ | | 2cd4737bc8 | f241bb1f42 | +----------------------------------------------------------------+------------+------------+ | boot_successes | 26 | 0 | | boot_failures | 12 | 7 | | BUG:soft_lockup-CPU##stuck_for#s | 1 | | | RIP:__do_softirq | 1 | | | RIP:generic_exec_single | 1 | | | Kernel_panic-not_syncing:softlockup:hung_tasks | 1 | | | BUG:kernel_reboot-without-warning_in_test_stage | 11 | | | BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h | 0 | 7 | +----------------------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <rong.a.chen(a)intel.com&gt; [ 7.918069] BUG: sleeping function called from invalid context at mm/slab.h:418 [ 7.920610] in_atomic(): 1, irqs_disabled(): 0, pid: 1, name: swapper/0 [ 7.923304] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc1-00007-gf241bb1 #2 [ 7.925336] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 7.927606] Call Trace: [ 7.928472] dump_stack+0x5c/0x7b [ 7.929481] ___might_sleep+0xf1/0x110 [ 7.930530] __kmalloc+0x186/0x220 [ 7.931507] template_desc_init_fields+0x1a3/0x2a0 [ 7.932919] ? inode_doinit_with_dentry+0x250/0x4e0 [ 7.934281] ? selinux_inode_getsecid+0x30/0x30 [ 7.936534] ? security_inode_alloc+0x4d/0x90 [ 7.938397] ? __d_instantiate+0x34/0xf0 [ 7.939905] ? set_debug_rodata+0x11/0x11 [ 7.941193] lookup_template_desc+0x7f/0xa0 [ 7.942369] ? hash_setup+0xa6/0xa6 [ 7.943381] ima_template_desc_current+0x2e/0x40 [ 7.944663] hash_setup+0xe/0xa6 [ 7.945873] init_ima+0x18/0x8a [ 7.946830] ? hash_setup+0xa6/0xa6 [ 7.947892] do_one_initcall+0x46/0x214 [ 7.949029] kernel_init_freeable+0x1c7/0x272 [ 7.950376] ? rest_init+0xd0/0xd0 [ 7.951404] kernel_init+0xa/0x110 [ 7.952531] ret_from_fork+0x35/0x40 [ 7.954077] ima: No TPM chip found, activating TPM-bypass! [ 7.955570] ima: Allocated hash algorithm: sha1 [ 7.956858] No architecture policies found [ 7.960449] evm: Initialising EVM extended attributes: [ 7.961870] evm: security.selinux [ 7.962906] evm: security.apparmor [ 7.963878] evm: security.ima [ 7.964769] evm: security.capability [ 7.965790] evm: HMAC attrs: 0x1 [ 7.968979] PM: Magic number: 7:687:860 [ 7.970343] rtc_cmos 00:00: setting system clock to 2019-06-18T00:52:12 UTC (1560819132) [ 10.026662] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX [ 10.029407] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 10.041086] Sending DHCP requests ., OK [ 10.046350] IP-Config: Got DHCP answer from 10.0.2.2, my address is 10.0.2.15 [ 10.048145] IP-Config: Complete: [ 10.049163] device=eth0, hwaddr=52:54:00:12:34:56, ipaddr=10.0.2.15, mask=255.255.255.0, gw=10.0.2.2 [ 10.051802] host=vm-snb-quantal-x86_64-726, domain=, nis-domain=(none) [ 10.053678] bootserver=10.0.2.2, rootserver=10.0.2.2, rootpath= [ 10.053680] nameserver0=10.0.2.3 [ 10.059316] Freeing unused decrypted memory: 2040K [ 10.062003] Freeing unused kernel image memory: 2504K [ 10.075092] Write protecting the kernel read-only data: 22528k [ 10.077905] Freeing unused kernel image memory: 2012K [ 10.080302] Freeing unused kernel image memory: 1924K [ 10.081764] rodata_test: all tests were successful [ 10.083218] Run /init as init process [ 10.090919] random: init: uninitialized urandom read (12 bytes read) [ 10.205441] random: mountall: uninitialized urandom read (12 bytes read) LKP: HOSTNAME vm-snb-quantal-x86_64-726, MAC 52:54:00:12:34:56, kernel 5.2.0-rc1-00007-gf241bb1 2, serial console /dev/ttyS0 [ 10.349986] udevd[268]: starting version 175 [ 10.546386] hostname: the specified hostname is invalid [ 10.546391] [ 10.552166] Kernel tests: Boot OK! [ 10.552170] [ 10.555238] /lkp/lkp/src/bin/run-lkp [ 10.555241] [ 10.564058] piix4_smbus 0000:00:01.3: SMBus Host Controller at 0x700, revision 0 [ 10.670662] RESULT_ROOT=/result/rcutorture/300s-default-srcud/vm-snb-quantal-x86_64/quantal-core-x86_64-2019-04-26.cgz/x86_64-rhel-7.6/gcc-7/f241bb1f42aa95a996c0c6ec8ff38e4306ec0281/3 [ 10.670667] [ 10.691373] libata version 3.00 loaded. [ 10.703581] job=/lkp/jobs/scheduled/vm-snb-quantal-x86_64-726/rcutorture-300s-default-srcud-quantal-core-x86_64-2019-0-20190618-5865-18zeb9r-1.yaml [ 10.703586] [ 10.811722] init: failsafe main process (418) killed by TERM signal [ 10.829247] result_service=raw_upload, RESULT_MNT=/inn/result, RESULT_ROOT=/inn/result/rcutorture/300s-default-srcud/vm-snb-quantal-x86_64/quantal-core-x86_64-2019-04-26.cgz/x86_64-rhel-7.6/gcc-7/f241bb1f42aa95a996c0c6ec8ff38e4306ec0281/3 [ 10.829252] [ 10.836612] ata_piix 0000:00:01.1: version 2.13 [ 10.848885] run-job /lkp/jobs/scheduled/vm-snb-quantal-x86_64-726/rcutorture-300s-default-srcud-quantal-core-x86_64-2019-0-20190618-5865-18zeb9r-1.yaml [ 10.848890] [ 10.865329] Floppy drive(s): fd0 is 2.88M AMI BIOS [ 10.868606] random: dd: uninitialized urandom read (4096 bytes read) [ 10.896214] FDC 0 is a S82078B [ 10.901731] init: rc-sysinit main process (442) killed by TERM signal [ 10.928934] scsi host0: ata_piix [ 10.957326] scsi host1: ata_piix [ 10.958503] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc0c0 irq 14 [ 10.960303] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc0c8 irq 15 [ 10.979394] parport_pc 00:04: reported by Plug and Play ACPI [ 10.981457] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE] [ 10.981953] /usr/bin/wget -q --timeout=1800 --tries=1 --local-encoding=UTF-8 http://inn:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/sche... -O /dev/null [ 10.981958] [ 11.000909] ppdev: user-space parallel port driver [ 11.005896] bochs-drm 0000:00:02.0: remove_conflicting_pci_framebuffers: bar 0: 0xfd000000 -> 0xfdffffff [ 11.008124] bochs-drm 0000:00:02.0: remove_conflicting_pci_framebuffers: bar 2: 0xfebf0000 -> 0xfebf0fff [ 11.010168] bochs-drm 0000:00:02.0: vgaarb: deactivate vga console [ 11.012995] Console: switching to colour dummy device 80x25 [ 11.013930] [drm] Found bochs VGA, ID 0xb0c0. [ 11.014714] [drm] Framebuffer size 16384 kB @ 0xfd000000, mmio @ 0xfebf0000. [ 11.015998] [TTM] Zone kernel: Available graphics memory: 1017352 KiB [ 11.017033] [TTM] Initializing pool allocator [ 11.017691] [TTM] Initializing DMA pool allocator [ 11.019198] [drm] Initialized bochs-drm 1.0.0 20130925 for 0000:00:02.0 on minor 0 [ 11.023705] fbcon: bochs-drmdrmfb (fb0) is primary device [ 11.024753] Console: switching to colour frame buffer device 128x48 [ 11.029324] bochs-drm 0000:00:02.0: fb0: bochs-drmdrmfb frame buffer device [ 11.036999] target ucode: To reproduce: # build kernel cd linux cp config-5.2.0-rc1-00007-gf241bb1 .config make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Rong Chen