While booting qemu_arm64 and qemu_arm with Linux version 5.8.0-rc3-next-20200706 the kernel panic noticed due to kernel NULL pointer dereference. metadata: git branch: master git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git commit: 5680d14d59bddc8bcbc5badf00dbbd4374858497 git describe: next-20200706 make_kernelversion: 5.8.0-rc3 kernel-config: https://builds.tuxbuild.com/Glr-Ql1wbp3qN3cnHogyNA/kernel.config qemu arm64 boot crash log, [ 0.972053] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 0.975301] Mem abort info: [ 0.976316] ESR = 0x96000004 [ 0.977378] EC = 0x25: DABT (current EL), IL = 32 bits [ 0.979363] SET = 0, FnV = 0 [ 0.980458] EA = 0, S1PTW = 0 [ 0.981583] Data abort info: [ 0.982634] ISV = 0, ISS = 0x00000004 [ 0.984213] CM = 0, WnR = 0 [ 0.985260] [0000000000000000] user address but active_mm is swapper [ 0.987600] Internal error: Oops: 96000004 [#1] PREEMPT SMP [ 0.989557] Modules linked in: [ 0.990671] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.8.0-rc3-next-20200706 #1 [ 0.993711] Hardware name: linux,dummy-virt (DT) [ 0.995708] pstate: 00000005 (nzcv daif -PAN -UAO BTYPE=--) [ 0.998168] pc : pl011_dma_probe+0x90/0x360 [ 1.000015] lr : pl011_dma_probe+0x84/0x360 [ 1.001827] sp : ffff800011f4b880 [ 1.003294] x29: ffff800011f4b880 x28: ffff0000fada5800 [ 1.005562] x27: ffff800011e057d8 x26: 0000000000020002 [ 1.007884] x25: ffff8000110c0ed0 x24: ffff8000110c0b70 [ 1.010164] x23: 0000000000000000 x22: ffff0000faca8000 [ 1.012438] x21: ffff0000faee6000 x20: 0000000000000000 [ 1.014724] x19: ffff0000faee7480 x18: 0000000000000002 [ 1.016977] x17: 0000000000001400 x16: 0000000000001c00 [ 1.019270] x15: 0000000000000001 x14: 000000000003a051 [ 1.021544] x13: ffff000000000000 x12: 0000000000000010 [ 1.023805] x11: 0000000000000004 x10: 0101010101010101 [ 1.026091] x9 : fffffffffffffffc x8 : 7f7f7f7f7f7f7f7f [ 1.028354] x7 : fefefeff646c606d x6 : 0a0c0c1680808080 [ 1.030645] x5 : 00000000160c0c0a x4 : 0000000000000000 [ 1.032887] x3 : ffff800011de1878 x2 : 0000000000000000 [ 1.035179] x1 : 5d22d5f0b315de00 x0 : 0000000000000000 [ 1.037439] Call trace: [ 1.038640] pl011_dma_probe+0x90/0x360 [ 1.040281] pl011_startup+0x268/0x2f0 [ 1.041935] uart_startup.part.0+0x124/0x2d8 [ 1.043777] uart_port_activate+0x60/0x98 [ 1.045483] tty_port_open+0x90/0x248 [ 1.047163] uart_open+0x1c/0x30 [ 1.048568] tty_open+0xf4/0x478 [ 1.049973] chrdev_open+0xa4/0x1a0 [ 1.051491] do_dentry_open+0x12c/0x398 [ 1.053156] vfs_open+0x2c/0x38 [ 1.054551] path_openat+0x86c/0xdf0 [ 1.056103] do_filp_open+0x78/0x100 [ 1.057651] do_sys_openat2+0x1e4/0x2a0 [ 1.059410] do_sys_open+0x58/0xa0 [ 1.060866] console_on_rootfs+0x24/0x68 [ 1.062577] kernel_init_freeable+0x1f4/0x254 [ 1.064450] kernel_init+0x14/0x110 [ 1.065972] ret_from_fork+0x10/0x34 [ 1.067504] Code: 97fcf14c aa0003f4 b140041f 54000488 (f9400280) [ 1.070107] ---[ end trace 8001204d6659f3e5 ]--- [ 1.072104] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.074875] SMP: stopping secondary CPUs [ 1.076613] Kernel Offset: disabled [ 1.078123] CPU features: 0x240002,20002004 [ 1.079916] Memory Limit: none [ 1.081255] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]--- Full test log, https://lkft.validation.linaro.org/scheduler/job/1542193#L510 qemu command, /usr/bin/qemu-system-aarch64 -cpu host -machine virt-2.10,accel=kvm -nographic -net nic,model=virtio,macaddr=BA:DD:AD:CC:09:05 -net tap -m 2048 -monitor none -kernel /kernel/Image --append "console=ttyAMA0 root=/dev/vda rw" -hda /rootfs/rpb-console-image-lkft-juno-20200521172852-2689.rootfs.ext4 -m 4096 -smp 4 -nographic -drive format=qcow2,file=lava-guest.qcow2,media=disk,if=virtio,id=lavatest -- Linaro LKFT https://lkft.linaro.org
