Messages in this thread | | | Date | Thu, 16 Dec 2021 19:58:40 +0800 | From | Carel Si <> | Subject | Re: [LKP] Re: [x86/mm/64] f154f29085: BUG:kernel_reboot-without-warning_in_boot_stage |
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Hi Boris,
On Thu, Dec 16, 2021 at 11:06:59AM +0100, Borislav Petkov wrote: > On Thu, Dec 16, 2021 at 03:04:16PM +0800, Yin Fengwei wrote: > > The testing was with Qemu. > > This is hardly what I asked for. > > > And we found that the hang is related with clang-14. > > I saw that already. > > > The original report showed the kernel is built with clang-14: > > # build kernel > > cd linux > > cp config-5.16.0-rc3-00003-gf154f290855b .config > > make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules > > make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install > > I saw that too. > > > Looks like KASAN related stub generated by clang-14 (KASAN_SHADOW_OFFSET and asan_report). > > This function is early function called before kasan_init. > > > > Looks like we need to disable KASAN_SANITIZE for arch/x86/kernel/cpu/common.c. So clang-14 will > > be happy with this kind of early TLB flush? Thanks. > > Ok, I don't understand: I asked for how exactly to reproduce and whether > you can send me your vmlinux you built with your clang-14. What I get is > some possible explanation about what might be happening. > > So what do you expect me to do? Say, "oh, sure, you're right, send me a > patch" without even being able to see for myself what the root cause is? > > What if it is not the kernel's fault but clang-14 is miscompiling crap > as in so many other cases? > > I built clang-14 and built with your .config and it works here fine. So > why does yours fail? > > Or what's the point of all this? > > I mean, if you cannot send me what I ask for, you can say so. Then I can > ignore this whole report altogether and waste my time somewhere else.
We have uploaded vmlinuz, modules.cgz, config as well as other related file to: https://download.01.org/0day-ci/lkp-qemu/pkg/linux/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/
Machine types can refer to: https://zerobin.net/?e107cf7b56495d80#MQLh14wUT9Osv1tWCwiQx/okkAN48Nq+drVPE0PiNPw=
If there's any other msg needed, pls feel free to propose, thanks.
Below are our full steps to reproduce the issue:
# download lkp-tests $ git clone https://github.com/intel/lkp-tests.git
$ cd lkp-tests/
# download vmlinuz $ wget https://download.01.org/0day-ci/lkp-qemu/pkg/linux/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/vmlinuz-5.16.0-rc3-00003-gf154f290855b
# dowmload modules.cgz $ wget https://download.01.org/0day-ci/lkp-qemu/pkg/linux/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/modules.cgz
# download job-script which is attached
# run lkp qemu lkp-tests$ sudo bin/lkp qemu -k vmlinuz-5.16.0-rc3-00003-gf154f290855b -m modules.cgz job-script
~/lkp-tests/pkg/lkp-src ~/lkp-tests x86_64 ==> Making package: lkp-src 0-1 (Thu 16 Dec 2021 07:26:22 PM CST) ==> Checking runtime dependencies... ==> Checking buildtime dependencies... ==> WARNING: Using existing $srcdir/ tree ==> Removing existing $pkgdir/ directory... ==> Starting build()... make: Entering directory '/home/carel/lkp-tests/bin/event' klcc -D_FORTIFY_SOURCE=2 -c -o wakeup.o wakeup.c klcc -Wl,-O1,--sort-common,--as-needed,-z,relro -static -o wakeup wakeup.o rm -f wakeup.o strip wakeup make: Leaving directory '/home/carel/lkp-tests/bin/event' ==> Entering fakeroot environment... x86_64 ==> Starting package()... ==> Creating package "lkp-src"... 103987 blocks renamed '/home/carel/.lkp/cache/lkp-x86_64.cgz.tmp' -> '/home/carel/.lkp/cache/lkp-x86_64.cgz' ==> Leaving fakeroot environment. ==> Finished making: lkp-src 0-1 (Thu 16 Dec 2021 07:26:24 PM CST) ~/lkp-tests 12 blocks result_root: /home/carel/.lkp//result/boot/1/vm-snb/debian-10.4-x86_64-20200603.cgz/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/0 downloading initrds ... use local modules: /home/carel/.lkp/cache/modules.cgz /usr/bin/wget -q --timeout=1800 --tries=1 --local-encoding=UTF-8 http://0day.sh.intel.com:80/~lkp/osimage/debian/debian-10.4-x86_64-20200603.cgz -N -P /home/carel/.lkp/cache/osimage/debian 440459 blocks /usr/bin/wget -q --timeout=1800 --tries=1 --local-encoding=UTF-8 http://0day.sh.intel.com:80/~lkp/osimage/deps/debian-10.4-x86_64-20200603.cgz/run-ipconfig_20200608.cgz -N -P /home/carel/.lkp/cache/osimage/deps/debian-10.4-x86_64-20200603.cgz 1773 blocks /usr/bin/wget -q --timeout=1800 --tries=1 --local-encoding=UTF-8 http://0day.sh.intel.com:80/~lkp/osimage/deps/debian-10.4-x86_64-20200603.cgz/lkp_20210707.cgz -N -P /home/carel/.lkp/cache/osimage/deps/debian-10.4-x86_64-20200603.cgz 2321 blocks /usr/bin/wget -q --timeout=1800 --tries=1 --local-encoding=UTF-8 http://0day.sh.intel.com:80/~lkp/osimage/deps/debian-10.4-x86_64-20200603.cgz/rsync-rootfs_20200608.cgz -N -P /home/carel/.lkp/cache/osimage/deps/debian-10.4-x86_64-20200603.cgz 6856 blocks exec command: qemu-system-x86_64 -enable-kvm -fsdev local,id=test_dev,path=/home/carel/.lkp//result/boot/1/vm-snb/debian-10.4-x86_64-20200603.cgz/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/0,security_model=none -device virtio-9p-pci,fsdev=test_dev,mount_tag=9p/virtfs_mount -kernel vmlinuz-5.16.0-rc3-00003-gf154f290855b -append root=/dev/ram0 user=lkp job=/lkp/jobs/scheduled/vm-snb-192/boot-1-debian-10.4-x86_64-20200603.cgz-f154f290855b070cc94dd44ad253c0ef8a9337bb-20211208-23538-lnvkeg-5.yaml ARCH=x86_64 kconfig=x86_64-randconfig-a013-20211207 branch=tip/x86/mm commit=f154f290855b070cc94dd44ad253c0ef8a9337bb BOOT_IMAGE=/pkg/linux/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/vmlinuz-5.16.0-rc3-00003-gf154f290855b vmalloc=128M initramfs_async=0 page_owner=on max_uptime=600 RESULT_ROOT=/result/boot/1/vm-snb/debian-10.4-x86_64-20200603.cgz/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/3 LKP_LOCAL_RUN=1 selinux=0 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 drbd.minor_count=8 systemd.log_level=err ignore_loglevel console=tty0 earlyprintk=ttyS0,115200 console=ttyS0,115200 vga=normal rw ip=dhcp result_service=9p/virtfs_mount -initrd /home/carel/.lkp/cache/final_initrd -smp 2 -m 3144M -no-reboot -watchdog i6300esb -rtc base=localtime -device e1000,netdev=net0 -netdev user,id=net0 -display none -monitor null -serial stdio early console in setup code early console in extract_kernel input_data: 0x0000000006ffc2e0 input_len: 0x000000000260cb2b output: 0x0000000001000000 output_len: 0x00000000079e7da4 kernel_total_size: 0x0000000008a2c000 needed_size: 0x0000000008c00000 trampoline_32bit: 0x000000000009d000 Physical KASLR using RDTSC... Virtual KASLR using RDTSC...
Decompressing Linux... Parsing ELF... Performing relocations... done. Booting the kernel.
> > -- > Regards/Gruss, > Boris. > > SUSE Software Solutions Germany GmbH, GF: Ivo Totev, HRB 36809, AG Nürnberg #!/bin/sh
export_top_env() { export suite='boot' export testcase='boot' export category='functional' export timeout='10m' export job_origin='boot.yaml' export queue_cmdline_keys='branch commit queue_at_least_once' export queue='validate' export testbox='vm-snb-192' export tbox_group='vm-snb' export branch='tip/x86/mm' export commit='f154f290855b070cc94dd44ad253c0ef8a9337bb' export kconfig='x86_64-randconfig-a013-20211207' export repeat_to=6 export nr_vm=160 export submit_id='61b0b1ba6033575bf2dd6891' export job_file='/lkp/jobs/scheduled/vm-snb-192/boot-1-debian-10.4-x86_64-20200603.cgz-f154f290855b070cc94dd44ad253c0ef8a9337bb-20211208-23538-lnvkeg-5.yaml' export id='f7fba8ffd432f1208eb1518f4a9090af53d90c47' export queuer_version='/lkp-src' export model='qemu-system-x86_64 -enable-kvm -cpu SandyBridge' export nr_cpu=2 export memory='16G' export need_kconfig=\{\"KVM_GUEST\"\=\>\"y\"\} export ssh_base_port=23032 export kernel_cmdline='vmalloc=128M initramfs_async=0 page_owner=on' export rootfs='debian-10.4-x86_64-20200603.cgz' export compiler='clang-14' export enqueue_time='2021-12-08 21:23:06 +0800' export _id='61b0b1ba6033575bf2dd6893' export _rt='/result/boot/1/vm-snb/debian-10.4-x86_64-20200603.cgz/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb' export user='lkp' export LKP_LOCAL_RUN=1 export result_root='/result/boot/1/vm-snb/debian-10.4-x86_64-20200603.cgz/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/3' export scheduler_version='/lkp/lkp/.src-20211208-134658' export arch='x86_64' export max_uptime=600 export initrd='/osimage/debian/debian-10.4-x86_64-20200603.cgz' export bootloader_append='root=/dev/ram0 user=lkp job=/lkp/jobs/scheduled/vm-snb-192/boot-1-debian-10.4-x86_64-20200603.cgz-f154f290855b070cc94dd44ad253c0ef8a9337bb-20211208-23538-lnvkeg-5.yaml ARCH=x86_64 kconfig=x86_64-randconfig-a013-20211207 branch=tip/x86/mm commit=f154f290855b070cc94dd44ad253c0ef8a9337bb BOOT_IMAGE=/pkg/linux/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/vmlinuz-5.16.0-rc3-00003-gf154f290855b vmalloc=128M initramfs_async=0 page_owner=on max_uptime=600 RESULT_ROOT=/result/boot/1/vm-snb/debian-10.4-x86_64-20200603.cgz/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/3 LKP_LOCAL_RUN=1 selinux=0 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 drbd.minor_count=8 systemd.log_level=err ignore_loglevel console=tty0 earlyprintk=ttyS0,115200 console=ttyS0,115200 vga=normal rw' export modules_initrd='/pkg/linux/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/modules.cgz' export bm_initrd='/osimage/deps/debian-10.4-x86_64-20200603.cgz/run-ipconfig_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/lkp_20210707.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/rsync-rootfs_20200608.cgz' export lkp_initrd='/osimage/user/lkp/lkp-x86_64.cgz' export site='inn' export LKP_CGI_PORT=80 export LKP_CIFS_PORT=139 export schedule_notify_address= export queue_at_least_once=1 export kernel='/pkg/linux/x86_64-randconfig-a013-20211207/clang-14/f154f290855b070cc94dd44ad253c0ef8a9337bb/vmlinuz-5.16.0-rc3-00003-gf154f290855b' export dequeue_time='2021-12-08 21:23:48 +0800' export job_initrd='/lkp/jobs/scheduled/vm-snb-192/boot-1-debian-10.4-x86_64-20200603.cgz-f154f290855b070cc94dd44ad253c0ef8a9337bb-20211208-23538-lnvkeg-5.cgz'
[ -n "$LKP_SRC" ] || export LKP_SRC=/lkp/${user:-lkp}/src }
run_job() { echo $$ > $TMP/run-job.pid
. $LKP_SRC/lib/http.sh . $LKP_SRC/lib/job.sh . $LKP_SRC/lib/env.sh
export_top_env
run_monitor $LKP_SRC/monitors/one-shot/wrapper boot-slabinfo run_monitor $LKP_SRC/monitors/one-shot/wrapper boot-meminfo run_monitor $LKP_SRC/monitors/one-shot/wrapper memmap run_monitor $LKP_SRC/monitors/no-stdout/wrapper boot-time run_monitor $LKP_SRC/monitors/wrapper kmsg run_monitor $LKP_SRC/monitors/wrapper heartbeat run_monitor $LKP_SRC/monitors/wrapper meminfo run_monitor $LKP_SRC/monitors/wrapper oom-killer run_monitor $LKP_SRC/monitors/plain/watchdog
run_test $LKP_SRC/tests/wrapper sleep 1 }
extract_stats() { export stats_part_begin= export stats_part_end=
$LKP_SRC/stats/wrapper boot-slabinfo $LKP_SRC/stats/wrapper boot-meminfo $LKP_SRC/stats/wrapper memmap $LKP_SRC/stats/wrapper boot-memory $LKP_SRC/stats/wrapper boot-time $LKP_SRC/stats/wrapper kernel-size $LKP_SRC/stats/wrapper kmsg $LKP_SRC/stats/wrapper sleep $LKP_SRC/stats/wrapper meminfo
$LKP_SRC/stats/wrapper time sleep.time $LKP_SRC/stats/wrapper dmesg $LKP_SRC/stats/wrapper kmsg $LKP_SRC/stats/wrapper last_state $LKP_SRC/stats/wrapper stderr $LKP_SRC/stats/wrapper time }
"$@"
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