[2J[01;01H[=3h[2J[01;01H[0m[35m[40m[0m[37m[40mEFI stub: Entering in SVC mode with MMU enabled EFI stub: Booting Linux Kernel... EFI stub: Using DTB from configuration table EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path EFI stub: Exiting boot services and installing virtual address map... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 5.10.195-cip38 (KernelCI@build-j50641-arm-gcc-10-multi-v7-defconfig-24kgf) (arm-linux-gnueabihf-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2) #1 SMP Tue Sep 19 12:59:56 UTC 2023 [ 0.000000] CPU: ARMv7 Processor [414fc0f0] revision 0 (ARMv7), cr=10c5387d [ 0.000000] CPU: div instructions available: patching division code [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache [ 0.000000] OF: fdt: Machine model: linux,dummy-virt [ 0.000000] random: crng init done [ 0.000000] earlycon: pl11 at MMIO 0x09000000 (options '') [ 0.000000] printk: bootconsole [pl11] enabled [ 0.000000] Memory policy: Data cache writealloc [ 0.000000] efi: EFI v2.70 by EDK II [ 0.000000] efi: SMBIOS=0x5fb78000 SMBIOS 3.0=0x5fb76000 MEMATTR=0x5e152a90 MEMRESERVE=0x5c6eae90 [ 0.000000] cma: Reserved 64 MiB at 0x56800000 [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x0000000040000000-0x000000005fffffff] [ 0.000000] Normal empty [ 0.000000] HighMem empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000040000000-0x000000005f9c6fff] [ 0.000000] node 0: [mem 0x000000005f9c7000-0x000000005fb88fff] [ 0.000000] node 0: [mem 0x000000005fb89000-0x000000005fffffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000040000000-0x000000005fffffff] [ 0.000000] On node 0 totalpages: 131072 [ 0.000000] DMA zone: 1024 pages used for memmap [ 0.000000] DMA zone: 0 pages reserved [ 0.000000] DMA zone: 131072 pages, LIFO batch:31 [ 0.000000] psci: probing for conduit method from DT. [ 0.000000] psci: PSCIv1.1 detected in firmware. [ 0.000000] psci: Using standard PSCI v0.2 function IDs [ 0.000000] psci: Trusted OS migration not required [ 0.000000] psci: SMC Calling Convention v1.0 [ 0.000000] percpu: Embedded 20 pages/cpu s49868 r8192 d23860 u81920 [ 0.000000] pcpu-alloc: s49868 r8192 d23860 u81920 alloc=20*4096 [ 0.000000] pcpu-alloc: [0] 0 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 130048 [ 0.000000] Kernel command line: console=ttyAMA0,115200 root=/dev/ram0 debug verbose console_msg_format=syslog earlycon deferred_probe_timeout=60 initrd=initrd <6>[ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear) <6>[ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear) <6>[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off <6>[ 0.000000] Memory: 419272K/524288K available (14336K kernel code, 2239K rwdata, 5364K rodata, 2048K init, 424K bss, 39480K reserved, 65536K cma-reserved, 0K highmem) <6>[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 <6>[ 0.000000] rcu: Hierarchical RCU implementation. <6>[ 0.000000] rcu: RCU event tracing is enabled. <6>[ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=16 to nr_cpu_ids=1. <6>[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. <6>[ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1 <6>[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16 <6>[ 0.000000] GICv2m: range[mem 0x08020000-0x08020fff], SPI[80:143] <6>[ 0.000000] arch_timer: cp15 timer(s) running at 62.50MHz (virt). <6>[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x1cd42e208c, max_idle_ns: 881590405314 ns <6>[ 0.000143] sched_clock: 56 bits at 62MHz, resolution 16ns, wraps every 4398046511096ns <6>[ 0.000477] Switching to timer-based delay loop, resolution 16ns <6>[ 0.004740] Console: colour dummy device 80x30 <6>[ 0.006111] Calibrating delay loop (skipped), value calculated using timer frequency.. 125.00 BogoMIPS (lpj=625000) <6>[ 0.006453] CPU: Testing write buffer coherency: ok <3>[ 0.007595] CPU0: Spectre v2: firmware did not set auxiliary control register IBE bit, system vulnerable <6>[ 0.008045] CPU0: Spectre BHB: enabling loop workaround for all CPUs <6>[ 0.008317] pid_max: default: 32768 minimum: 301 <6>[ 0.011841] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear) <6>[ 0.012088] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear) <3>[ 0.029497] /cpus/cpu@0 missing clock-frequency property <6>[ 0.029821] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 <6>[ 0.034484] Setting up static identity map for 0x40300000 - 0x403000ac <6>[ 0.036182] rcu: Hierarchical SRCU implementation. <6>[ 0.039586] Remapping and enabling EFI services. <6>[ 0.041468] smp: Bringing up secondary CPUs ... <6>[ 0.041712] smp: Brought up 1 node, 1 CPU <6>[ 0.041884] SMP: Total of 1 processors activated (125.00 BogoMIPS). <6>[ 0.042100] CPU: All CPU(s) started in SVC mode. <6>[ 0.049800] devtmpfs: initialized <6>[ 0.057434] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0 <6>[ 0.072690] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns <6>[ 0.073735] futex hash table entries: 256 (order: 2, 16384 bytes, linear) <6>[ 0.079014] pinctrl core: initialized pinctrl subsystem <6>[ 0.093841] SMBIOS 3.0.0 present. <6>[ 0.094188] DMI: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 <6>[ 0.099809] NET: Registered protocol family 16 <6>[ 0.116611] DMA: preallocated 256 KiB pool for atomic coherent allocations <6>[ 0.121324] thermal_sys: Registered thermal governor 'step_wise' <6>[ 0.121640] cpuidle: using governor menu <6>[ 0.122227] No ATAGs? <6>[ 0.123155] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers. <6>[ 0.123427] hw-breakpoint: maximum watchpoint size is 8 bytes. <6>[ 0.127428] Serial: AMBA PL011 UART driver <6>[ 0.166607] 9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 61, base_baud = 0) is a PL011 rev1 <6>[ 0.168194] printk: console [ttyAMA0] enabled <6>[ 0.168194] printk: console [ttyAMA0] enabled <6>[ 0.168646] printk: bootconsole [pl11] disabled <6>[ 0.168646] printk: bootconsole [pl11] disabled <6>[ 0.206987] iommu: Default domain type: Translated <6>[ 0.208967] vgaarb: loaded <5>[ 0.211035] SCSI subsystem initialized <7>[ 0.211770] libata version 3.00 loaded. <6>[ 0.212769] usbcore: registered new interface driver usbfs <6>[ 0.213073] usbcore: registered new interface driver hub <6>[ 0.213297] usbcore: registered new device driver usb <6>[ 0.214986] pps_core: LinuxPPS API ver. 1 registered <6>[ 0.215099] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <6>[ 0.215318] PTP clock support registered <6>[ 0.216798] Registered efivars operations <6>[ 0.231192] clocksource: Switched to clocksource arch_sys_counter <6>[ 1.037935] NET: Registered protocol family 2 <6>[ 1.039875] IP idents hash table entries: 8192 (order: 4, 65536 bytes, linear) <6>[ 1.043808] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear) <6>[ 1.044181] TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear) <6>[ 1.044511] TCP bind hash table entries: 4096 (order: 3, 32768 bytes, linear) <6>[ 1.044813] TCP: Hash tables configured (established 4096 bind 4096) <6>[ 1.045942] UDP hash table entries: 256 (order: 1, 8192 bytes, linear) <6>[ 1.046242] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear) <6>[ 1.047230] NET: Registered protocol family 1 <6>[ 1.049776] RPC: Registered named UNIX socket transport module. <6>[ 1.049966] RPC: Registered udp transport module. <6>[ 1.050112] RPC: Registered tcp transport module. <6>[ 1.050240] RPC: Registered tcp NFSv4.1 backchannel transport module. <6>[ 1.050512] PCI: CLS 0 bytes, default 64 <6>[ 1.053941] Trying to unpack rootfs image as initramfs... <6>[ 1.489427] Freeing initrd memory: 7704K <5>[ 1.492091] Initialise system trusted keyrings <6>[ 1.493557] workingset: timestamp_bits=30 max_order=17 bucket_order=0 <6>[ 1.501758] squashfs: version 4.0 (2009/01/31) Phillip Lougher <5>[ 1.503964] NFS: Registering the id_resolver key type <5>[ 1.504324] Key type id_resolver registered <5>[ 1.504482] Key type id_legacy registered <6>[ 1.504888] nfs4filelayout_init: NFSv4 File Layout Driver Registering... <6>[ 1.505119] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering... <6>[ 1.505575] ntfs: driver 2.1.32 [Flags: R/O]. <5>[ 1.506560] Key type asymmetric registered <5>[ 1.506767] Asymmetric key parser 'x509' registered <6>[ 1.507111] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247) <6>[ 1.507391] io scheduler mq-deadline registered <6>[ 1.507591] io scheduler kyber registered <6>[ 1.523210] pl061_gpio 9030000.pl061: PL061 GPIO chip registered <6>[ 1.528180] pci-host-generic 3f000000.pcie: host bridge /pcie@10000000 ranges: <6>[ 1.529079] pci-host-generic 3f000000.pcie: IO 0x003eff0000..0x003effffff -> 0x0000000000 <6>[ 1.529809] pci-host-generic 3f000000.pcie: MEM 0x0010000000..0x003efeffff -> 0x0010000000 <6>[ 1.530089] pci-host-generic 3f000000.pcie: MEM 0x8000000000..0xffffffffff -> 0x8000000000 <6>[ 1.533237] pci-host-generic 3f000000.pcie: ECAM at [mem 0x3f000000-0x3fffffff] for [bus 00-0f] <6>[ 1.534198] pci-host-generic 3f000000.pcie: PCI host bridge to bus 0000:00 <6>[ 1.534538] pci_bus 0000:00: root bus resource [bus 00-0f] <6>[ 1.534818] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] <6>[ 1.535017] pci_bus 0000:00: root bus resource [mem 0x10000000-0x3efeffff] <6>[ 1.536282] pci 0000:00:00.0: [1b36:0008] type 00 class 0x060000 <6>[ 1.538662] pci 0000:00:01.0: [1af4:1000] type 00 class 0x020000 <6>[ 1.539073] pci 0000:00:01.0: reg 0x10: [io 0x0040-0x005f] <6>[ 1.539278] pci 0000:00:01.0: reg 0x14: [mem 0x10049000-0x10049fff] <6>[ 1.539659] pci 0000:00:01.0: reg 0x20: [mem 0x10044000-0x10047fff 64bit pref] <6>[ 1.540080] pci 0000:00:01.0: reg 0x30: [mem 0xfffc0000-0xffffffff pref] <6>[ 1.540590] pci 0000:00:02.0: [1af4:1001] type 00 class 0x010000 <6>[ 1.540758] pci 0000:00:02.0: reg 0x10: [io 0x0000-0x003f] <6>[ 1.540906] pci 0000:00:02.0: reg 0x14: [mem 0x10048000-0x10048fff] <6>[ 1.541100] pci 0000:00:02.0: reg 0x20: [mem 0x10040000-0x10043fff 64bit pref] <6>[ 1.542343] PCI: bus0: Fast back to back transfers disabled <6>[ 1.543394] pci 0000:00:01.0: BAR 6: assigned [mem 0x10000000-0x1003ffff pref] <6>[ 1.543666] pci 0000:00:01.0: BAR 4: assigned [mem 0x10040000-0x10043fff 64bit pref] <6>[ 1.543970] pci 0000:00:02.0: BAR 4: assigned [mem 0x10044000-0x10047fff 64bit pref] <6>[ 1.544185] pci 0000:00:01.0: BAR 1: assigned [mem 0x10048000-0x10048fff] <6>[ 1.544345] pci 0000:00:02.0: BAR 1: assigned [mem 0x10049000-0x10049fff] <6>[ 1.544573] pci 0000:00:02.0: BAR 0: assigned [io 0x1000-0x103f] <6>[ 1.544801] pci 0000:00:01.0: BAR 0: assigned [io 0x1040-0x105f] <6>[ 1.559253] virtio-pci 0000:00:01.0: enabling device (0100 -> 0103) <6>[ 1.561559] virtio-pci 0000:00:02.0: enabling device (0100 -> 0103) <6>[ 1.614465] Serial: 8250/16550 driver, 5 ports, IRQ sharing enabled <6>[ 1.618729] SuperH (H)SCI(F) driver initialized <6>[ 1.620077] msm_serial: driver initialized <6>[ 1.620409] STMicroelectronics ASC driver initialized <6>[ 1.621686] STM32 USART driver initialized <6>[ 1.647252] brd: module loaded <6>[ 1.657375] loop: module loaded <5>[ 1.664771] virtio_blk virtio1: [vda] 1048576 512-byte logical blocks (537 MB/512 MiB) <6>[ 1.665060] vda: detected capacity change from 0 to 536870912 <5>[ 1.681411] physmap-flash 0.flash: physmap platform flash device: [mem 0x00000000-0x03ffffff] <6>[ 1.682770] 0.flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000 <6>[ 1.683381] Intel/Sharp Extended Query Table at 0x0031 <6>[ 1.684012] Using buffer write method <7>[ 1.684442] erase region 0: offset=0x0,size=0x40000,blocks=256 <5>[ 1.685920] physmap-flash 0.flash: physmap platform flash device: [mem 0x04000000-0x07ffffff] <6>[ 1.686473] 0.flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000 <6>[ 1.686711] Intel/Sharp Extended Query Table at 0x0031 <6>[ 1.687164] Using buffer write method <7>[ 1.687292] erase region 0: offset=0x0,size=0x40000,blocks=256 <5>[ 1.687483] Concatenating MTD devices: <5>[ 1.687630] (0): \"0.flash\" <5>[ 1.687747] (1): \"0.flash\" <5>[ 1.687843] into device \"0.flash\" <6>[ 1.781133] CAN device driver interface <6>[ 1.782220] bgmac_bcma: Broadcom 47xx GBit MAC driver loaded <6>[ 1.783334] e1000e: Intel(R) PRO/1000 Network Driver <6>[ 1.783478] e1000e: Copyright(c) 1999 - 2015 Intel Corporation. <6>[ 1.783783] igb: Intel(R) Gigabit Ethernet Network Driver <6>[ 1.783938] igb: Copyright (c) 2007-2014 Intel Corporation. <6>[ 1.787748] pegasus: v0.9.3 (2013/04/25), Pegasus/Pegasus II USB Ethernet driver <6>[ 1.788025] usbcore: registered new interface driver pegasus <6>[ 1.788251] usbcore: registered new interface driver asix <6>[ 1.788450] usbcore: registered new interface driver ax88179_178a <6>[ 1.788706] usbcore: registered new interface driver cdc_ether <6>[ 1.788944] usbcore: registered new interface driver smsc75xx <6>[ 1.789205] usbcore: registered new interface driver smsc95xx <6>[ 1.789445] usbcore: registered new interface driver net1080 <6>[ 1.789887] usbcore: registered new interface driver cdc_subset <6>[ 1.790161] usbcore: registered new interface driver zaurus <6>[ 1.790466] usbcore: registered new interface driver cdc_ncm <6>[ 1.792895] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver <6>[ 1.793111] ehci-pci: EHCI PCI platform driver <6>[ 1.793424] ehci-platform: EHCI generic platform driver <6>[ 1.793769] ehci-orion: EHCI orion driver <6>[ 1.794049] SPEAr-ehci: EHCI SPEAr driver <6>[ 1.794338] ehci-st: EHCI STMicroelectronics driver <6>[ 1.794643] ehci-exynos: EHCI Exynos driver <6>[ 1.794934] ehci-atmel: EHCI Atmel driver <6>[ 1.795219] tegra-ehci: Tegra EHCI driver <6>[ 1.795509] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver <6>[ 1.795781] ohci-pci: OHCI PCI platform driver <6>[ 1.796060] ohci-platform: OHCI generic platform driver <6>[ 1.796394] SPEAr-ohci: OHCI SPEAr driver <6>[ 1.796635] ohci-st: OHCI STMicroelectronics driver <6>[ 1.796910] ohci-atmel: OHCI Atmel driver <6>[ 1.798096] usbcore: registered new interface driver usb-storage <6>[ 1.803235] i2c /dev entries driver <6>[ 1.814518] sdhci: Secure Digital Host Controller Interface driver <6>[ 1.814696] sdhci: Copyright(c) Pierre Ossman <6>[ 1.816372] Synopsys Designware Multimedia Card Interface Driver <6>[ 1.817641] sdhci-pltfm: SDHCI platform and OF driver helper <6>[ 1.821611] ledtrig-cpu: registered to indicate activity on CPUs <6>[ 1.825429] pstore: Registered efi as persistent store backend <6>[ 1.826694] usbcore: registered new interface driver usbhid <6>[ 1.826882] usbhid: USB HID core driver <6>[ 1.832189] NET: Registered protocol family 10 <6>[ 1.837542] Segment Routing with IPv6 <6>[ 1.838008] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver <6>[ 1.840450] NET: Registered protocol family 17 <6>[ 1.840758] can: controller area network core <6>[ 1.841295] NET: Registered protocol family 29 <6>[ 1.841490] can: raw protocol <6>[ 1.841712] can: broadcast manager protocol <6>[ 1.841939] can: netlink gateway - max_hops=1 <5>[ 1.842961] Key type dns_resolver registered <6>[ 1.843317] ThumbEE CPU extension supported. <5>[ 1.843507] Registering SWP/SWPB emulation handler <5>[ 1.844710] Loading compiled-in X.509 certificates <6>[ 1.850404] pstore: Using crash dump compression: deflate <6>[ 1.858079] input: gpio-keys as /devices/platform/gpio-keys/input/input0 <6>[ 1.863369] uart-pl011 9000000.pl011: no DMA platform data <6>[ 1.944299] Freeing unused kernel memory: 2048K <6>[ 1.957442] Run /init as init process <7>[ 1.957585] with arguments: <7>[ 1.957673] /init <7>[ 1.957757] verbose <7>[ 1.957858] with environment: <7>[ 1.957990] HOME=/ <7>[ 1.958062] TERM=linux Starting syslogd: OK Starting klogd: OK Running sysctl: OK Populating /dev using udev: <30>[ 2.487502] udevd[75]: starting version 3.2.9 <27>[ 2.530558] udevd[75]: specified user 'tss' unknown <27>[ 2.533525] udevd[75]: specified group 'tss' unknown <30>[ 2.553642] udevd[76]: starting eudev-3.2.9 done Saving random seed: OK Starting network: OK Starting dropbear sshd: OK /bin/sh: can't access tty; job control turned off / # / # # # / # mkdir /lava-117583 mkdir /lava-117583 / # mount /dev/disk/by-uuid/1f93dfe1-c3ee-4be0-b393-0ebb43272384 -t ext2 /lava-117583 mount /dev/disk/by-uuid/1f93dfe1-c3ee-4be0-b393-0ebb43272384 -t ext2 /lava-1 17583 <6>[ 9.471564] EXT4-fs (vda): mounting ext2 file system using the ext4 subsystem <6>[ 9.493720] EXT4-fs (vda): mounted filesystem without journal. Opts: (null) / # ls -la /lava-117583/bin/lava-test-runner ls -la /lava-117583/bin/lava-test-runner -rwxr-xr-x 1 root root 1039 Sep 19 2023 [1;32m/lava-117583/bin/lava-test-runner[m / # export SHELL=/bin/sh export SHELL=/bin/sh / # . /lava-117583/environment . /lava-117583/environment / # /lava-117583/bin/lava-test-runner /lava-117583/0 /lava-117583/bin/lava-test-runner /lava-117583/0 + export 'TESTRUN_ID=0_dmesg' + cd /lava-117583/0/tests/0_dmesg + cat uuid + UUID=117583_1.1.3.1 + set +x <8>[ 10.176942] + KERNELCI_LAVA=y /bin/sh /opt/kernelci/dmesg.sh <8>[ 10.293130] <8>[ 10.384175] <8>[ 10.475763] + set +x <8>[ 10.479234] # / # #mkdir /lava-117583 / # mkdir /lava-117583mount /dev/disk/by-uuid/1f93dfe1-c3ee-4be0-b393-0ebb43272384 -t ext2 /lava-117583 mkdir: can't create directory '/lava-117583': File exists / # mount /dev/disk/by-uuid/1f93dfe1-c3ee-4be0-b393-0ebb43272384 -t ext2 /lava-1 17583ls -la /lava-117583/bin/lava-test-runner mount: mounting /dev/disk/by-uuid/1f93dfe1-c3ee-4be0-b393-0ebb43272384 on /lava-117583 failed: Device or resource busy / # ls -la /lava-117583/bin/lava-test-runnerexport SHELL=/bin/sh -rwxr-xr-x 1 root root 1039 Sep 19 2023 [1;32m/lava-117583/bin/lava-test-runner[m / # export SHELL=/bin/sh. /lava-117583/environment / # . /lava-117583/environment/lava-117583/bin/lava-test-runner /lava-117583/1 / # /lava-117583/bin/lava-test-runner /lava-117583/1 + export 'TESTRUN_ID=1_bootrr' + cd /lava-117583/1/tests/1_bootrr + cat uuid + UUID=117583_1.1.3.5 + set +x <8>[ 11.416877] + export 'PATH=/opt/bootrr/libexec/bootrr/helpers:/lava-117583/1/../bin:/sbin:/usr/sbin:/bin:/usr/bin' + cd /opt/bootrr/libexec/bootrr + sh helpers/bootrr-auto /lava-117583/1/../bin/lava-test-case <8>[ 11.541723] /lava-117583/1/../bin/lava-test-case <8>[ 11.624795] /lava-117583/1/../bin/lava-test-case <8>[ 11.696587] + set +x <8>[ 11.755905] / # poweroff poweroff