FYI, we noticed the below changes on https://github.com/0day-ci/linux Shawn-Guo/scatterlist-use-sg_dma_len-in-sg_set_page/20160411-105225 commit c38ecfb12e9a4c0c17d0879090741d6ce2a200de ("scatterlist: use sg_dma_len() in sg_set_page()") +------------------------------------------------------------------+----------+------------+ | | v4.6-rc3 | c38ecfb12e | +------------------------------------------------------------------+----------+------------+ | kernel_BUG_at_crypto/scatterwalk.c | 0 | 32 | | invalid_opcode:#[##]DEBUG_PAGEALLOC | 0 | 32 | | RIP:scatterwalk_start | 0 | 32 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 32 | | backtrace:bt_selftest_smp | 0 | 32 | | backtrace:bt_selftest_init | 0 | 32 | +------------------------------------------------------------------+----------+------------+ [ 20.259507] cryptomgr_probe (141) used greatest stack depth: 14344 bytes left [ 20.260567] cryptomgr_probe (145) used greatest stack depth: 14280 bytes left [ 20.261260] ------------[ cut here ]------------ [ 20.261681] kernel BUG at crypto/scatterwalk.c:37! [ 20.262293] invalid opcode: 0000 [#1] DEBUG_PAGEALLOC [ 20.262776] Modules linked in: [ 20.263070] CPU: 0 PID: 1 Comm: swapper Not tainted 4.6.0-rc3-00001-gc38ecfb #1 [ 20.263714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 20.264500] task: ffff88001217c000 ti: ffff880012180000 task.ti: ffff880012180000 [ 20.265162] RIP: 0010:[] [] scatterwalk_start+0x41/0x55 [ 20.265959] RSP: 0000:ffff880012183b00 EFLAGS: 00010246 [ 20.266434] RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff8aa734f6 [ 20.267063] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8bad0048 [ 20.267700] RBP: ffff880012183b20 R08: ffff880012183d20 R09: 0000000000000002 [ 20.268330] R10: ffff880012183c80 R11: 0000000000000000 R12: ffff880012183d30 [ 20.268966] R13: ffff880012183bf0 R14: 0000000000000000 R15: 0000000000000000 [ 20.269592] FS: 0000000000000000(0000) GS:ffffffff8b830000(0000) knlGS:0000000000000000 [ 20.270332] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.270844] CR2: 0000000000000000 CR3: 000000000b80c000 CR4: 00000000000006f0 [ 20.271474] Stack: [ 20.271661] ffff880012183bd0 0000000000000002 0000000000000000 ffff880012183c80 [ 20.272364] ffff880012183b58 ffffffff8ac82d82 ffff880012183bd0 0000000000000010 [ 20.273069] ffff880010dafc68 0000000000000010 ffffffff8aa734f6 ffff880012183b68 [ 20.273776] Call Trace: [ 20.274006] [] blkcipher_walk_first+0x12d/0x243 [ 20.274552] [] ? aes_decrypt+0x6d/0x6d [ 20.275034] [] blkcipher_walk_virt+0x3a/0x3c [ 20.275557] [] crypto_ecb_crypt+0x2e/0x97 [ 20.276060] [] ? __kernel_fpu_end+0x41/0x43 [ 20.276582] [] crypto_ecb_encrypt+0x46/0x55 [ 20.277102] [] ? setkey+0x10a/0x117 [ 20.277574] [] ? pvclock_clocksource_read+0x6e/0x110 [ 20.278187] [] ? sg_assign_page+0x3a/0x5a [ 20.278764] [] skcipher_crypt_blkcipher+0x35/0x37 [ 20.279337] [] ? skcipher_crypt_blkcipher+0x35/0x37 [ 20.279921] [] skcipher_encrypt_blkcipher+0x18/0x1a [ 20.280504] [] smp_e+0x140/0x1a5 [ 20.280969] [] smp_ah+0x3e/0x81 [ 20.281398] [] bt_selftest_smp+0x127/0x856 [ 20.281919] [] ? debug_mutex_unlock+0x233/0x2ac [ 20.282468] [] ? __mutex_unlock_slowpath+0x1bd/0x1c8 [ 20.283054] [] ? mutex_unlock+0x9/0xb [ 20.283527] [] bt_selftest_init+0x197/0x1ae [ 20.284045] [] ? test_ecdh_sample+0x96/0x96 [ 20.284570] [] do_one_initcall+0x12f/0x21c [ 20.285095] [] kernel_init_freeable+0x115/0x1d3 [ 20.285645] [] kernel_init+0x9/0x15b [ 20.286138] [] ret_from_fork+0x22/0x40 [ 20.286617] [] ? rest_init+0xba/0xba [ 20.287085] Code: fd 49 89 f4 48 c7 c7 48 00 ad 8b 45 85 f6 0f 94 c3 31 d2 89 de 48 83 c3 02 e8 2c 63 ec ff 48 ff 04 dd 68 26 c4 8b 45 85 f6 75 02 <0f> 0b 41 8b 44 24 08 5b 41 5c 41 89 45 08 41 5d 41 5e 5d c3 31 [ 20.289560] RIP [] scatterwalk_start+0x41/0x55 [ 20.290117] RSP [ 20.290459] ---[ end trace 9e10e2ce7abe5940 ]--- [ 20.290886] Kernel panic - not syncing: Fatal exception FYI, raw QEMU command line is: qemu-system-x86_64 -enable-kvm -cpu Westmere -kernel /pkg/linux/x86_64-randconfig-n0-04111246/gcc-5/c38ecfb12e9a4c0c17d0879090741d6ce2a200de/vmlinuz-4.6.0-rc3-00001-gc38ecfb -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-yocto-ia32-13/bisect_boot-1-yocto-minimal-i386.cgz-x86_64-randconfig-n0-04111246-c38ecfb12e9a4c0c17d0879090741d6ce2a200de-20160411-124852-85aq5l-0.yaml ARCH=x86_64 kconfig=x86_64-randconfig-n0-04111246 branch=linux-devel/devel-spot-201604111237 commit=c38ecfb12e9a4c0c17d0879090741d6ce2a200de BOOT_IMAGE=/pkg/linux/x86_64-randconfig-n0-04111246/gcc-5/c38ecfb12e9a4c0c17d0879090741d6ce2a200de/vmlinuz-4.6.0-rc3-00001-gc38ecfb max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-ia32/yocto-minimal-i386.cgz/x86_64-randconfig-n0-04111246/gcc-5/c38ecfb12e9a4c0c17d0879090741d6ce2a200de/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-kbuild-yocto-ia32-13::dhcp drbd.minor_count=8' -initrd /fs/sde1/initrd-vm-kbuild-yocto-ia32-13 -m 320 -smp 1 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sde1/disk0-vm-kbuild-yocto-ia32-13,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-ia32-13 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-ia32-13 -daemonize -display none -monitor null Thanks, Xiaolong Ye