Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. 2019/12/04 00:12:30 fuzzer started 2019/12/04 00:12:32 dialing manager at 10.128.0.26:42111 2019/12/04 00:12:32 syscalls: 2689 2019/12/04 00:12:32 code coverage: enabled 2019/12/04 00:12:32 comparison tracing: enabled 2019/12/04 00:12:32 extra coverage: extra coverage is not supported by the kernel 2019/12/04 00:12:32 setuid sandbox: enabled 2019/12/04 00:12:32 namespace sandbox: enabled 2019/12/04 00:12:32 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/04 00:12:32 fault injection: enabled 2019/12/04 00:12:32 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/04 00:12:32 net packet injection: enabled 2019/12/04 00:12:32 net device setup: enabled 2019/12/04 00:12:32 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/04 00:12:32 devlink PCI setup: PCI device 0000:00:10.0 is not available 00:12:33 executing program 0: socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000440)={0xffffffffffffffff, 0xffffffffffffffff}) bind$unix(r0, &(0x7f0000000000)=@file={0x1, './file0\x00'}, 0x6e) r1 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='.\x00', 0x0, 0x0) faccessat(r1, &(0x7f0000000080)='./file0\x00', 0x80200000003, 0x0) 00:12:33 executing program 1: socket$kcm(0xa, 0x0, 0x3a) r0 = openat$mixer(0xffffffffffffff9c, &(0x7f0000000380)='/dev/mixer\x00', 0x404002, 0x0) ioctl$SIOCRSSL2CALL(r0, 0x89e2, &(0x7f00000003c0)=@default) openat$cgroup_root(0xffffffffffffff9c, 0x0, 0x200002, 0x0) r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000180)='memory.events\x00', 0x26e1, 0x0) r2 = perf_event_open(&(0x7f0000000040)={0x0, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7fffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0x0, 0xffffffffffffffff, 0x0) ioctl$PERF_EVENT_IOC_PERIOD(r1, 0x4030582a, &(0x7f0000000040)) r3 = openat$cgroup_ro(0xffffffffffffffff, &(0x7f0000000200)='/group.sta\x9f\xd4t\x00+\x04J{\t\xab\v\x02t\xe1\t\x85\xa6\xfa\x15\xb3[\xa6\x94!\xf2\x04\xde\xc5f\x8a\x06\x00\x00\x00\xb9\x0f\xf8`\xe0\x1f&+\xaf\xacu\nm\\\xe2Y\xcba\xea\f\xd9DXX>\xef/\xc5\x97\xea\x93\xa7\xde\xc9\xb4\x16\x8eF\x8b\xe0Wm\x1d\x0e\xbf\x8b\xc4G\x8f\x8e\xd8[T|i$\x88\x04\x00\x00\x00\x00\x00\x00\x00\x90\x1eB\x8b\x98\xad\xd17_Q\xe15\x84\x8f\xea\x98\xc6\xe3WE\x11\xe0\xc6\x1f\xf2/\xf6\x1f', 0x2761, 0x0) sendmsg$kcm(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000000f80)}, 0x0) perf_event_open(&(0x7f0000000180)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1ff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2}, 0x0, 0xfffffffdffffffff, 0xffffffffffffffff, 0x0) ioctl$PERF_EVENT_IOC_SET_BPF(0xffffffffffffffff, 0x40042408, 0xffffffffffffffff) ioctl$sock_kcm_SIOCKCMCLONE(r2, 0x89e2, 0x0) sysfs$2(0x2, 0x400, &(0x7f00000000c0)=""/105) perf_event_open(&(0x7f0000000300)={0x0, 0xffffffffffffff32, 0x0, 0x0, 0xa7, 0x78, 0x0, 0x0, 0x10000, 0x23f4bfd4f66397ec, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x1, 0x0, 0x1, 0x0, 0x0, 0x1, 0xa, @perf_config_ext={0x2d, 0x6}, 0x8000, 0x0, 0x2}, 0x0, 0x2, 0xffffffffffffffff, 0x0) ioctl$PERF_EVENT_IOC_PERIOD(r3, 0x4030582a, &(0x7f0000000000)=0x6) openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.events\x00', 0x7a05, 0x1700) prctl$PR_SET_ENDIAN(0x14, 0x3) syz_open_dev$swradio(&(0x7f00000002c0)='/dev/swradio#\x00', 0x0, 0x2) openat$tun(0xffffffffffffff9c, 0x0, 0x0, 0x0) ioctl$PERF_EVENT_IOC_SET_FILTER(0xffffffffffffffff, 0x89f1, 0x0) syzkaller login: [ 56.267070][ T8163] IPVS: ftp: loaded support on port[0] = 21 [ 56.393893][ T8163] chnl_net:caif_netlink_parms(): no params data found [ 56.431923][ T8163] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.440945][ T8163] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.449312][ T8163] device bridge_slave_0 entered promiscuous mode [ 56.458062][ T8163] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.466283][ T8163] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.474318][ T8163] device bridge_slave_1 entered promiscuous mode 00:12:33 executing program 2: r0 = socket$inet_udplite(0x2, 0x2, 0x88) ioctl(r0, 0x1000008912, &(0x7f0000000000)="0800b5055e0bcfe87b0071") pipe(&(0x7f0000000080)={0xffffffffffffffff, 0xffffffffffffffff}) vmsplice(r2, &(0x7f00000000c0)=[{&(0x7f0000000180)="77690addcfbe1fbb66ec", 0xff3b}], 0x1, 0x1) close(r2) r3 = socket(0x10, 0x3, 0x0) setsockopt$netlink_NETLINK_TX_RING(r3, 0x10e, 0xc, &(0x7f0000000040)={0x7ff}, 0x17f) write(0xffffffffffffffff, &(0x7f0000000180)="1c0000002200", 0x6) splice(r1, 0x0, r2, 0x0, 0x10000, 0x0) [ 56.493415][ T8166] IPVS: ftp: loaded support on port[0] = 21 [ 56.500512][ T8163] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.512017][ T8163] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 56.534928][ T8163] team0: Port device team_slave_0 added [ 56.546303][ T8163] team0: Port device team_slave_1 added [ 56.651151][ T8163] device hsr_slave_0 entered promiscuous mode 00:12:34 executing program 3: r0 = socket$nl_route(0x10, 0x3, 0x0) sendmsg$nl_route(r0, &(0x7f0000000180)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f00000003c0)=@newlink={0x3c, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x1c, 0x12, @bridge={{0xc, 0x1, 'bridge\x00'}, {0xc, 0x2, [@IFLA_BR_GROUP_FWD_MASK={0x8}]}}}]}, 0x3c}}, 0x0) [ 56.729624][ T8163] device hsr_slave_1 entered promiscuous mode [ 56.884554][ T8169] IPVS: ftp: loaded support on port[0] = 21 [ 56.898263][ T8171] IPVS: ftp: loaded support on port[0] = 21 00:12:34 executing program 4: r0 = syz_open_dev$midi(&(0x7f0000000080)='/dev/midi#\x00', 0x2, 0x123002) write$P9_RLOPEN(r0, &(0x7f0000000040)={0x18}, 0x18) [ 56.932144][ T8163] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 57.003356][ T8163] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 57.072593][ T8163] netdevsim netdevsim0 netdevsim2: renamed from eth2 00:12:34 executing program 5: perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x81, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}, 0x0, 0x0, 0x7}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) r0 = add_key$keyring(0x0, 0x0, 0x0, 0x0, 0xfffffffffffffffe) r1 = syz_open_dev$midi(&(0x7f0000000000)='/dev/midi#\x00', 0x3, 0x430401) r2 = socket$inet6_sctp(0xa, 0x10000000005, 0x84) r3 = socket$inet6_sctp(0xa, 0x10000000005, 0x84) r4 = syz_open_dev$vbi(&(0x7f0000000040)='/dev/vbi#\x00', 0x3, 0x2) ioctl$VIDIOC_G_SLICED_VBI_CAP(r4, 0xc0745645, &(0x7f0000000100)={0x0, [], 0xa}) ioctl$VIDIOC_S_FMT(r4, 0xc0d05605, &(0x7f00000001c0)={0x8, @pix={0x0, 0x8, 0x32315258, 0xa8a8c16f673a3c76, 0x8, 0x8, 0x4, 0xffffff98, 0x1, 0x8, 0x7, 0x6}}) getsockopt$inet_sctp6_SCTP_GET_ASSOC_ID_LIST(r3, 0x84, 0x1d, &(0x7f000095dff8)={0x1, [0x0]}, &(0x7f000095dffc)=0x8) getsockopt$inet_sctp6_SCTP_PR_ASSOC_STATUS(r2, 0x84, 0x73, &(0x7f0000000000)={r5, 0x0, 0x20}, &(0x7f0000000080)=0x18) setsockopt$inet_sctp6_SCTP_RESET_STREAMS(r1, 0x84, 0x77, &(0x7f0000000040)={r5, 0x40, 0x2, [0x401, 0x401]}, 0xc) add_key$user(&(0x7f0000000480)='user\x00', &(0x7f0000000100)={'syz'}, &(0x7f0000000180)='X\\', 0x2, r0) r6 = syz_open_dev$mouse(&(0x7f0000000180)='/dev/input/mouse#\x00', 0x0, 0x0) sendmsg$nl_xfrm(r6, 0x0, 0x40000001) move_pages(0x0, 0x2c9, &(0x7f0000000000), &(0x7f000026bfec), &(0x7f0000002000), 0x0) [ 57.133597][ T8163] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 57.199116][ T8173] IPVS: ftp: loaded support on port[0] = 21 [ 57.272604][ T8163] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.279809][ T8163] bridge0: port 2(bridge_slave_1) entered forwarding state [ 57.287705][ T8163] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.294850][ T8163] bridge0: port 1(bridge_slave_0) entered forwarding state [ 57.324226][ T8166] chnl_net:caif_netlink_parms(): no params data found [ 57.333644][ T8176] IPVS: ftp: loaded support on port[0] = 21 [ 57.452993][ T8169] chnl_net:caif_netlink_parms(): no params data found [ 57.471352][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.480713][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.497236][ T8166] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.505315][ T8166] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.513522][ T8166] device bridge_slave_0 entered promiscuous mode [ 57.532286][ T8171] chnl_net:caif_netlink_parms(): no params data found [ 57.546281][ T8166] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.553751][ T8166] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.562317][ T8166] device bridge_slave_1 entered promiscuous mode [ 57.637870][ T8169] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.645341][ T8169] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.653979][ T8169] device bridge_slave_0 entered promiscuous mode [ 57.680397][ T8166] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.695313][ T8166] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.705089][ T8169] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.714160][ T8169] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.721984][ T8169] device bridge_slave_1 entered promiscuous mode [ 57.742003][ T8171] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.749202][ T8171] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.757039][ T8171] device bridge_slave_0 entered promiscuous mode [ 57.768212][ T8171] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.775369][ T8171] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.783891][ T8171] device bridge_slave_1 entered promiscuous mode [ 57.803514][ T8169] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.813472][ T8173] chnl_net:caif_netlink_parms(): no params data found [ 57.827296][ T8166] team0: Port device team_slave_0 added [ 57.843018][ T8169] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.865647][ T8166] team0: Port device team_slave_1 added [ 57.891973][ T8171] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.903240][ T8171] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.935610][ T8169] team0: Port device team_slave_0 added [ 57.947066][ T8171] team0: Port device team_slave_0 added [ 57.956502][ T8163] 8021q: adding VLAN 0 to HW filter on device bond0 [ 57.986610][ T8169] team0: Port device team_slave_1 added [ 58.005184][ T8171] team0: Port device team_slave_1 added [ 58.015658][ T8173] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.022912][ T8173] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.031838][ T8173] device bridge_slave_0 entered promiscuous mode [ 58.044345][ T8173] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.052785][ T8173] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.060612][ T8173] device bridge_slave_1 entered promiscuous mode [ 58.091595][ T8169] device hsr_slave_0 entered promiscuous mode [ 58.128902][ T8169] device hsr_slave_1 entered promiscuous mode [ 58.169442][ T8169] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.179882][ T8176] chnl_net:caif_netlink_parms(): no params data found [ 58.251256][ T8166] device hsr_slave_0 entered promiscuous mode [ 58.289122][ T8166] device hsr_slave_1 entered promiscuous mode [ 58.328716][ T8166] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.353066][ T8163] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.378658][ T8176] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.388122][ T8176] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.396823][ T8176] device bridge_slave_0 entered promiscuous mode [ 58.416155][ T8167] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.424619][ T8167] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.434487][ T8173] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.461526][ T8176] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.470986][ T8176] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.480625][ T8176] device bridge_slave_1 entered promiscuous mode [ 58.511306][ T8171] device hsr_slave_0 entered promiscuous mode [ 58.559072][ T8171] device hsr_slave_1 entered promiscuous mode [ 58.608608][ T8171] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.616926][ T8167] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 58.626043][ T8167] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 58.634635][ T8167] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.641726][ T8167] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.650430][ T8167] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 58.659178][ T8167] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 58.667456][ T8167] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.674670][ T8167] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.683311][ T8173] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.722550][ T3053] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 58.732180][ T3053] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 58.741118][ T3053] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 58.750099][ T3053] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 58.775717][ T8169] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 58.812402][ T8176] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.825231][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 58.833799][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 58.842411][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 58.851224][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 58.860363][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 58.870825][ T8173] team0: Port device team_slave_0 added [ 58.877073][ T8169] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 58.935278][ T8169] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 58.983206][ T8169] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 59.032333][ T8176] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.045710][ T8163] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 59.057753][ T8163] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 59.066586][ T8173] team0: Port device team_slave_1 added [ 59.077232][ T8166] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 59.137921][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 59.146389][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 59.170048][ T8166] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 59.202444][ T8166] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 59.283294][ T8176] team0: Port device team_slave_0 added [ 59.289962][ T8171] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 59.341117][ T8166] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 59.441333][ T8173] device hsr_slave_0 entered promiscuous mode [ 59.478907][ T8173] device hsr_slave_1 entered promiscuous mode [ 59.538626][ T8173] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.555278][ T8176] team0: Port device team_slave_1 added [ 59.561712][ T8171] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 59.621926][ T8171] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 59.672336][ T8171] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 59.758973][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 59.766461][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 59.794667][ T8163] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 59.802955][ T8173] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 59.840600][ T8173] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 59.891787][ T8173] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 59.953106][ T8173] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 60.051239][ T8176] device hsr_slave_0 entered promiscuous mode [ 60.079101][ T8176] device hsr_slave_1 entered promiscuous mode [ 60.118633][ T8176] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.193545][ T8176] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 60.230722][ T8176] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 60.301265][ T8176] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 165.328412][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 165.335204][ C0] rcu: 0-...!: (10499 ticks this GP) idle=f86/1/0x4000000000000002 softirq=10628/10628 fqs=3 [ 165.345777][ C0] (t=10501 jiffies g=6217 q=189) [ 165.350803][ C0] rcu: rcu_preempt kthread starved for 10496 jiffies! g6217 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 165.361894][ C0] rcu: RCU grace-period kthread stack dump: [ 165.367780][ C0] rcu_preempt R running task 29032 10 2 0x80004000 [ 165.375668][ C0] Call Trace: [ 165.378957][ C0] __schedule+0x9a0/0xcc0 [ 165.383281][ C0] schedule+0x181/0x210 [ 165.387435][ C0] schedule_timeout+0x14f/0x240 [ 165.392272][ C0] ? run_local_timers+0x120/0x120 [ 165.397285][ C0] rcu_gp_kthread+0xed8/0x1770 [ 165.402044][ C0] kthread+0x332/0x350 [ 165.406095][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 165.411192][ C0] ? kthread_blkcg+0xe0/0xe0 [ 165.415788][ C0] ret_from_fork+0x24/0x30 [ 165.420309][ C0] NMI backtrace for cpu 0 [ 165.424635][ C0] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.4.0-syzkaller #0 [ 165.432510][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 165.442566][ C0] Workqueue: events_unbound fsnotify_connector_destroy_workfn [ 165.450180][ C0] Call Trace: [ 165.453447][ C0] [ 165.456288][ C0] dump_stack+0x1fb/0x318 [ 165.460609][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 165.465444][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 165.471583][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 165.477635][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 165.483601][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 165.489483][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 165.494588][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 165.499791][ C0] ? trace_hardirqs_off+0x74/0x80 [ 165.504842][ C0] update_process_times+0x12d/0x180 [ 165.510128][ C0] tick_sched_timer+0x263/0x420 [ 165.514966][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 165.520501][ C0] __hrtimer_run_queues+0x403/0x840 [ 165.525701][ C0] hrtimer_interrupt+0x38c/0xda0 [ 165.530643][ C0] ? debug_smp_processor_id+0x9/0x20 [ 165.535918][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 165.541457][ C0] apic_timer_interrupt+0xf/0x20 [ 165.546404][ C0] [ 165.549332][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 [ 165.555473][ C0] Code: cd 07 48 89 de e8 64 02 3b 00 5b 5d c3 cc 48 8b 04 24 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 b8 81 8b 7e f7 c2 00 01 1f 00 75 2c <8b> 91 80 13 00 00 83 fa 02 75 21 48 8b 91 88 13 00 00 48 8b 32 48 [ 165.575239][ C0] RSP: 0018:ffffc90000dd78d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 165.583640][ C0] RAX: ffffffff81487326 RBX: ffffea00024ebe40 RCX: ffff8880a9ffa580 [ 165.591600][ C0] RDX: 0000000000000001 RSI: 00000000fffffffc RDI: ffffea00024ebe40 [ 165.600084][ C0] RBP: ffffc90000dd78f8 R08: 000000000003a768 R09: ffffed1013e8a287 [ 165.608052][ C0] R10: ffffed1013e8a287 R11: 0000000000000000 R12: ffff8880a6e90d20 [ 165.616026][ C0] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff88809f451428 [ 165.624000][ C0] ? mod_memcg_page_state+0x16/0x190 [ 165.629274][ C0] ? mod_memcg_page_state+0x16/0x190 [ 165.634546][ C0] free_thread_stack+0x168/0x590 [ 165.639493][ C0] put_task_stack+0xa3/0x130 [ 165.644074][ C0] finish_task_switch+0x3f1/0x550 [ 165.649091][ C0] __schedule+0x9a8/0xcc0 [ 165.653431][ C0] ? ___preempt_schedule+0x16/0x18 [ 165.658534][ C0] preempt_schedule+0xdb/0x120 [ 165.663287][ C0] ___preempt_schedule+0x16/0x18 [ 165.668214][ C0] _raw_spin_unlock_irqrestore+0xcc/0xe0 [ 165.673836][ C0] __call_srcu+0x7ab/0xb00 [ 165.678267][ C0] __synchronize_srcu+0x1cf/0x260 [ 165.683277][ C0] ? rcu_read_lock_any_held+0x1a0/0x1a0 [ 165.688834][ C0] synchronize_srcu+0x2cb/0x2f0 [ 165.693679][ C0] fsnotify_connector_destroy_workfn+0x44/0xb0 [ 165.699822][ C0] process_one_work+0x7ef/0x10d0 [ 165.704762][ C0] worker_thread+0xc01/0x1630 [ 165.709445][ C0] kthread+0x332/0x350 [ 165.713499][ C0] ? rcu_lock_release+0x30/0x30 [ 165.718334][ C0] ? kthread_blkcg+0xe0/0xe0 [ 165.722913][ C0] ret_from_fork+0x24/0x30