On Tue, Oct 10, 2017 at 5:13 AM, kernel test robot <xiaolong...@intel.com> wrote: > > FYI, we noticed the following commit (built with gcc-4.9): > > commit: a94b9367e044ba672c9f4105eb1516ff6ff4948a ("ipv6: grab rt->rt6i_ref > before allocating pcpu rt") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master > > in testcase: boot > > on test machine: qemu-system-x86_64 -enable-kvm -smp 2 -m 512M > > caused below changes (please refer to attached dmesg/kmsg for entire > log/backtrace): > > > +--------------------------------------------+------------+------------+ > | | 2b760fcf5c | a94b9367e0 | > +--------------------------------------------+------------+------------+ > | boot_successes | 8 | 4 | > | boot_failures | 0 | 4 | > | BUG:using_smp_processor_id()in_preemptible | 0 | 4 | > +--------------------------------------------+------------+------------+ > > > > [ 28.927206] BUG: using smp_processor_id() in preemptible [00000000] code: > odhcpd/1011 > [ 28.928424] caller is debug_smp_processor_id+0x17/0x19 > [ 28.929085] CPU: 1 PID: 1011 Comm: odhcpd Not tainted > 4.14.0-rc3-00908-ga94b936 #1 > [ 28.930196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > 1.10.2-1 04/01/2014 > [ 28.931421] Call Trace: > [ 28.931765] dump_stack+0x85/0xbe > [ 28.932244] check_preemption_disabled+0xdb/0xed > [ 28.932845] debug_smp_processor_id+0x17/0x19 > [ 28.933421] ip6_pol_route+0x541/0x607 > [ 28.933993] ip6_pol_route_output+0x11/0x13 > [ 28.934547] fib6_rule_action+0xbf/0x1ff > [ 28.935088] ? ip6_pol_route_input+0x17/0x17 > [ 28.935725] fib_rules_lookup+0x18e/0x245 > [ 28.936255] ? fib_rules_lookup+0x18e/0x245 > [ 28.936819] ? ip6_pol_route_input+0x17/0x17 > [ 28.937404] fib6_rule_lookup+0x5a/0xe9 > [ 28.937944] ? ip6_pol_route_input+0x17/0x17 > [ 28.938579] ip6_route_output_flags+0xd0/0xdc > [ 28.939147] ip6_dst_lookup_tail+0x57/0x1aa > [ 28.939748] ip6_dst_lookup_flow+0x33/0x73 > [ 28.940347] ip6_datagram_dst_update+0x25b/0x4c2 > [ 28.940947] ? save_stack_trace+0x16/0x18 > [ 28.941697] __ip6_datagram_connect+0x218/0x2ba > [ 28.942286] ? __ip6_datagram_connect+0x218/0x2ba > [ 28.942897] ? __local_bh_enable_ip+0x87/0xa8 > [ 28.943471] ? lock_sock_nested+0x42/0x90 > [ 28.944080] ip6_datagram_connect+0x26/0x3a > [ 28.944634] ip6_datagram_connect_v6_only+0x14/0x16 > [ 28.945296] inet_dgram_connect+0x4a/0x64 > [ 28.945815] SyS_connect+0x7e/0xbf > [ 28.946373] ? __might_fault+0x79/0x7f > [ 28.946934] compat_SyS_socketcall+0x113/0x219 > [ 28.947797] ? do_int80_syscall_32+0x22/0x1c1 > [ 28.948438] ? trace_hardirqs_on_caller+0x174/0x190 > [ 28.949063] do_int80_syscall_32+0x74/0x1c1 > [ 28.949664] entry_INT80_compat+0x32/0x50 > [ 28.950269] RIP: 0023:0xf7ef2384 > [ 28.950735] RSP: 002b:00000000ffa89318 EFLAGS: 00000296 ORIG_RAX: > 0000000000000066 > [ 28.951736] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: > 00000000ffa89328 > [ 28.952670] RDX: 00000000f7f38000 RSI: 00000000ffa89328 RDI: > 00000000ffa89440 > [ 28.953572] RBP: 00000000ffa89388 R08: 0000000000000000 R09: > 0000000000000000 > [ 28.954538] R10: 0000000000000000 R11: 0000000000000000 R12: > 0000000000000000 > [ 28.955533] R13: 0000000000000000 R14: 0000000000000000 R15: > 0000000000000000 > > Elapsed time: 30 > > initrds=( > /osimage/openwrt/openwrt-i386-2016-03-16.cgz > > /lkp/scheduled/vm-lkp-nex04-openwrt-ia32-27/boot-1-openwrt-i386-2016-03-16.cgz-a94b9367e044ba672c9f4105eb1516ff6ff4948a-20171009-12855-139piyy-0.cgz > /lkp/lkp/lkp-i386.cgz > ) > > cat "${initrds[@]}" > /fs/sdb1/initrd-vm-lkp-nex04-openwrt-ia32-27 > > kvm=( > qemu-system-x86_64 > -enable-kvm > -kernel > /pkg/linux/x86_64-randconfig-h0-10091308/gcc-4.9/a94b9367e044ba672c9f4105eb1516ff6ff4948a/vmlinuz-4.14.0-rc3-00908-ga94b936 > -initrd /fs/sdb1/initrd-vm-lkp-nex04-openwrt-ia32-27 > -m 512 > -smp 2 > -device e1000,netdev=net0 > -netdev user,id=net0,hostfwd=tcp::23296-:22 > -boot order=nc > -no-reboot > -watchdog i6300esb > -watchdog-action debug > -rtc base=localtime > -pidfile /dev/shm/kboot/pid-vm-lkp-nex04-openwrt-ia32-27 > -serial file:/dev/shm/kboot/vm-lkp-nex04-openwrt-ia32-27/serial > -serial file:/dev/shm/kboot/vm-lkp-nex04-openwrt-ia32-27/kmsg > -daemonize > -display none > -monitor null > ) > > append=( > ip=::::vm-lkp-nex04-openwrt-ia32-27::dhcp > root=/dev/ram0 > user=lkp > > job=/lkp/scheduled/vm-lkp-nex04-openwrt-ia32-27/boot-1-openwrt-i386-2016-03-16.cgz-a94b9367e044ba672c9f4105eb1516ff6ff4948a-20171009-12855-139piyy-0.yaml > ARCH=x86_64 > kconfig=x86_64-randconfig-h0-10091308 > branch=linux-devel/devel-spot-201710090350 > commit=a94b9367e044ba672c9f4105eb1516ff6ff4948a > > BOOT_IMAGE=/pkg/linux/x86_64-randconfig-h0-10091308/gcc-4.9/a94b9367e044ba672c9f4105eb1516ff6ff4948a/vmlinuz-4.14.0-rc3-00908-ga94b936 > max_uptime=600 > > RESULT_ROOT=/result/boot/1/vm-lkp-nex04-openwrt-ia32/openwrt-i386-2016-03-16.cgz/x86_64-randconfig-h0-10091308/gcc-4.9/a94b9367e044ba672c9f4105eb1516ff6ff4948a/0 > LKP_SERVER=inn > 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 > > > To reproduce: > > 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, > Xiaolong
Hi Xiaolong We believe this was fixed in commit 951f788a80ff8b6339c5c1ab888b0d4b4352efd8 ipv6: fix a BUG in rt6_get_pcpu_route()