FYI, we noticed the following commit (built with gcc-7): commit: 65d69a05938b05836f270501ba217ff521748312 ("platform/x86: Add SoCWatch driver for v2.6") 2018-09-30 11:20:01 in testcase: trinity with following parameters: runtime: 300s test-description: Trinity is a linux system call fuzz tester. test-url: http://codemonkey.org.uk/projects/trinity/ on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -m 256M caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +----------------------------------------------------------------+-----------+------------+ | | v4.19-rc5 | 65d69a0593 | +----------------------------------------------------------------+-----------+------------+ | boot_successes | 38 | 0 | | boot_failures | 0 | 6 | | WARNING:Could_NOT_find_tracepoint_structs_for_some_tracepoints | 0 | 6 | +----------------------------------------------------------------+-----------+------------+ [ 13.385284] WARNING: Could NOT find tracepoint structs for some tracepoints! [ 13.386543] ----------------------------------------- [ 13.387472] OK: LOADED SoC Watch Driver [ 13.388183] ----------------------------------------- [ 13.397539] NET: Registered protocol family 26 [ 13.398667] NET: Registered protocol family 10 [ 13.399578] _warn_unseeded_randomness: 2 callbacks suppressed [ 13.399585] random: get_random_u32 called from neigh_hash_alloc+0x79/0x8d with crng_init=0 [ 13.402803] random: get_random_bytes called from ipv6_regen_rndid+0x16/0x9b with crng_init=0 [ 13.404535] random: get_random_u32 called from bucket_table_alloc+0xfa/0x118 with crng_init=0 [ 13.406080] Segment Routing with IPv6 [ 13.406800] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver [ 13.408580] NET: Registered protocol family 17 [ 13.409404] NET: Registered protocol family 15 [ 13.410209] NET: Registered protocol family 5 [ 13.411054] NET: Registered protocol family 9 [ 13.411868] X25: Linux Version 0.2 [ 13.412503] NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team [ 13.414017] DECnet: Routing cache hash table of 256 buckets, 11Kbytes [ 13.415219] NET: Registered protocol family 12 [ 13.416041] 8021q: 802.1Q VLAN Support v1.8 [ 13.416815] 9pnet: Installing 9P2000 support [ 13.417693] NET: Registered protocol family 36 [ 13.418998] batman_adv: B.A.T.M.A.N. advanced 2018.2 (compatibility version 15) loaded [ 13.421089] ... APIC ID: 00000000 (0) [ 13.421784] ... APIC VERSION: 01050014 [ 13.421832] 0000000000000000000000000000000000000000000000000000000000000000 [ 13.421832] 0000000000000000000000000000000000000000000000000000000000000000 [ 13.421832] 0000000000000000000000000000000000000000000000000000000000001000 [ 13.426313] number of MP IRQ sources: 15. [ 13.427051] number of IO-APIC #0 registers: 24. [ 13.427855] testing the IO APIC....................... [ 13.428776] IO APIC #0...... [ 13.429328] .... register #00: 00000000 [ 13.430025] ....... : physical APIC id: 00 [ 13.430772] ....... : Delivery Type: 0 [ 13.431488] ....... : LTS : 0 [ 13.432209] .... register #01: 00170011 [ 13.432893] ....... : max redirection entries: 17 [ 13.433769] ....... : PRQ implemented: 0 [ 13.434540] ....... : IO APIC version: 11 [ 13.435316] .... register #02: 00000000 [ 13.436024] ....... : arbitration: 00 [ 13.436727] .... IRQ redirection table: [ 13.437437] IOAPIC 0: [ 13.437895] pin00, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.439271] pin01, enabled , edge , high, V(23), IRR(0), S(0), logical , D(01), M(0) [ 13.440637] pin02, enabled , edge , high, V(30), IRR(0), S(0), logical , D(01), M(0) [ 13.442014] pin03, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.443375] pin04, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.444742] pin05, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.446125] pin06, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.447519] pin07, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.448892] pin08, enabled , edge , high, V(24), IRR(0), S(0), logical , D(01), M(0) [ 13.450294] pin09, enabled , level, high, V(21), IRR(0), S(0), logical , D(01), M(0) [ 13.451656] pin0a, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.453056] pin0b, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.454443] pin0c, enabled , edge , high, V(22), IRR(0), S(0), logical , D(01), M(0) [ 13.455842] pin0d, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.457239] pin0e, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.458624] pin0f, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.460038] pin10, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.461432] pin11, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.462811] pin12, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.464192] pin13, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.465563] pin14, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.466938] pin15, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.468335] pin16, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.469708] pin17, disabled, edge , high, V(00), IRR(0), S(0), physical, D(00), M(0) [ 13.471064] IRQ to pin mappings: [ 13.471622] IRQ0 -> 0:2 [ 13.472092] IRQ1 -> 0:1 [ 13.472549] IRQ3 -> 0:3 [ 13.473029] IRQ4 -> 0:4 [ 13.473476] IRQ5 -> 0:5 [ 13.473944] IRQ6 -> 0:6 [ 13.474388] IRQ7 -> 0:7 [ 13.474817] IRQ8 -> 0:8 [ 13.475285] IRQ9 -> 0:9 [ 13.475729] IRQ10 -> 0:10 [ 13.476225] IRQ11 -> 0:11 [ 13.476691] IRQ12 -> 0:12 [ 13.477198] IRQ13 -> 0:13 [ 13.477667] IRQ14 -> 0:14 [ 13.478171] IRQ15 -> 0:15 [ 13.478643] .................................... done. [ 13.479558] Using IPI Shortcut mode [ 13.481221] sched_clock: Marking stable (13283604071, 197228228)->(13552011153, -71178854) [ 13.483335] page_owner is disabled [ 13.484476] Key type trusted registered [ 13.485511] Key type encrypted registered [ 13.486274] AppArmor: AppArmor sha1 policy hashing enabled [ 13.487801] BIOS EDD facility v0.16 2004-Jun-25, 2 devices found [ 13.494276] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 13.496588] 8021q: adding VLAN 0 to HW filter on device eth0 [ 15.538457] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX [ 15.540593] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 15.542696] _warn_unseeded_randomness: 6 callbacks suppressed [ 15.542703] random: get_random_bytes called from addrconf_dad_kick+0x6e/0x9b with crng_init=0 [ 15.551871] Sending DHCP requests . [ 15.551884] random: get_random_bytes called from ip_auto_config+0x6c8/0x1302 with crng_init=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, eywa