[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 45.020084][ T25] audit: type=1800 audit(1575414714.113:25): pid=8185 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 45.039602][ T25] audit: type=1800 audit(1575414714.113:26): pid=8185 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 45.086371][ T25] audit: type=1800 audit(1575414714.123:27): pid=8185 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.85' (ECDSA) to the list of known hosts. 2019/12/03 23:12:03 fuzzer started 2019/12/03 23:12:05 dialing manager at 10.128.0.26:42111 2019/12/03 23:12:05 syscalls: 2689 2019/12/03 23:12:05 code coverage: enabled 2019/12/03 23:12:05 comparison tracing: enabled 2019/12/03 23:12:05 extra coverage: extra coverage is not supported by the kernel 2019/12/03 23:12:05 setuid sandbox: enabled 2019/12/03 23:12:05 namespace sandbox: enabled 2019/12/03 23:12:05 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 23:12:05 fault injection: enabled 2019/12/03 23:12:05 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 23:12:05 net packet injection: enabled 2019/12/03 23:12:05 net device setup: enabled 2019/12/03 23:12:05 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 23:12:05 devlink PCI setup: PCI device 0000:00:10.0 is not available 23:12:06 executing program 0: sendmsg(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000100)=[{&(0x7f0000000040)="2f0000001c0005a4ffffff000d000000020000000b001000ec0091c913000180f0ff7014f4afc9ce9c", 0x29}], 0x1}, 0x0) r0 = socket(0x10, 0x80002, 0x0) socketpair$unix(0x1, 0x3, 0x0, &(0x7f0000000240)={0xffffffffffffffff, 0xffffffffffffffff}) r3 = fcntl$dupfd(r2, 0x0, r1) ioctl$PERF_EVENT_IOC_ENABLE(r3, 0x8912, 0x400200) sendmmsg$alg(r0, &(0x7f0000000140)=[{0x6, 0x0, &(0x7f0000000100), 0x6, &(0x7f0000000100)}], 0x492492492492805, 0x0) 23:12:06 executing program 1: r0 = socket$netlink(0x10, 0x3, 0x0) writev(r0, &(0x7f00000000c0)=[{&(0x7f0000000000)="290000005200190f00003fffffffda060a00ea110000000500"/41, 0x29}], 0x1) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000080)={0xffffffffffffffff, 0xffffffffffffffff}) r2 = dup(r1) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) recvmmsg(r0, &(0x7f0000007c80), 0x400000000000046, 0x2, 0x0) syzkaller login: [ 57.694995][ T8348] IPVS: ftp: loaded support on port[0] = 21 [ 57.877329][ T8351] IPVS: ftp: loaded support on port[0] = 21 [ 57.877495][ T8348] chnl_net:caif_netlink_parms(): no params data found 23:12:07 executing program 2: r0 = socket$inet_udp(0x2, 0x2, 0x0) setsockopt$SO_BINDTODEVICE(r0, 0x1, 0x19, &(0x7f00000000c0)='ip_vti0\x00', 0x10) perf_event_open(&(0x7f0000000040)={0x2, 0x70, 0x1f, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0x0, 0xffffffffffffffff, 0x0) perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7f, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) connect$inet(r0, &(0x7f0000000100)={0x2, 0x0, @rand_addr=0x80000000}, 0x10) sendmmsg(r0, &(0x7f0000007fc0), 0x400000000000030, 0x0) [ 57.963361][ T8348] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.972872][ T8348] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.981037][ T8348] device bridge_slave_0 entered promiscuous mode [ 58.000370][ T8348] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.010672][ T8348] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.018694][ T8348] device bridge_slave_1 entered promiscuous mode [ 58.077112][ T8348] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.098987][ T8348] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.155707][ T8351] chnl_net:caif_netlink_parms(): no params data found [ 58.178684][ T8348] team0: Port device team_slave_0 added [ 58.189327][ T8354] IPVS: ftp: loaded support on port[0] = 21 [ 58.197036][ T8348] team0: Port device team_slave_1 added 23:12:07 executing program 3: perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4141, 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, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) open(&(0x7f0000000100)='./file0\x00', 0x0, 0x0) perf_event_open(&(0x7f0000000040)={0x2, 0x70, 0x1f, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 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) add_key$keyring(0x0, 0x0, 0x0, 0x0, 0xfffffffffffffffe) r0 = add_key$user(&(0x7f00000000c0)='user\x00', &(0x7f0000000040)={'syz', 0x3}, &(0x7f0000000340)="585ccbe4ed83b836c1a6474914dc55e72206297b6895b66147b3c7218a9169a85ea0bdc9e1587a050000000000000042e33089754c8107c3cd3923dd4a71c2ff06007b6b4816122d2550829eaa9435c99926022b8753a188748c569f435fb3bae96efb74b50ec93c152f5e8e198a29e5c0d0c60000ce0637ce003d661ff5ff70e48884ca000018cea71fcfacf40d32e4b58a8d2725561f6110fd7b06f90b5274cc5c1e298a16324fe27da2a9d5ba9ff3c009d308bd73f4772539", 0x2b2, 0xfffffffffffffffe) r1 = add_key$user(&(0x7f0000000280)='user\x00', &(0x7f0000000180)={'syz'}, &(0x7f0000000000)="03", 0x1, 0xfffffffffffffffd) r2 = add_key$user(&(0x7f00000000c0)='user\x00', &(0x7f0000000000)={'syz'}, &(0x7f0000000380)="585ccbe4ed83b836c1a6474914dc55e72206297b6895b66147b3c7218a9169a85ea0bdc9e1587a050000000000000042e33089754c8107c3cd3923dd4a71c2ff06007b6b4816122d2550829eaa9435c99926022b8753a188748c569f435fb3bae96efb74b50ec93c152f5e8e198a29e5c0d0c60000ce0637ce", 0x79, 0xfffffffffffffffe) keyctl$dh_compute(0x17, &(0x7f0000000140)={r1, r0, r2}, &(0x7f0000000440)=""/243, 0x23d, &(0x7f0000000240)={&(0x7f0000000080)={'tgr128-generic\x00'}}) keyctl$instantiate(0xc, 0x0, 0x0, 0x0, 0x0) ioctl$VIDIOC_G_STD(0xffffffffffffffff, 0x80085617, 0x0) [ 58.299225][ T8348] device hsr_slave_0 entered promiscuous mode [ 58.326771][ T8348] device hsr_slave_1 entered promiscuous mode [ 58.398836][ T8351] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.405958][ T8351] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.414151][ T8351] device bridge_slave_0 entered promiscuous mode [ 58.450627][ T8351] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.458625][ T8351] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.476822][ T8351] device bridge_slave_1 entered promiscuous mode 23:12:07 executing program 4: syz_open_dev$video(&(0x7f0000000100)='/dev/video#\x00', 0x0, 0x0) r0 = syz_open_dev$video(0x0, 0x0, 0x0) ioctl$VIDIOC_S_FMT(r0, 0xc0d05604, &(0x7f0000000180)={0x3, @vbi}) [ 58.537355][ T8356] IPVS: ftp: loaded support on port[0] = 21 [ 58.558846][ T8348] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.650135][ T8351] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.672185][ T8348] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.719043][ T8348] netdevsim netdevsim0 netdevsim2: renamed from eth2 23:12:07 executing program 5: perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7f, 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, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) open(0x0, 0x0, 0x0) ioctl$SNDRV_CTL_IOCTL_ELEM_READ(0xffffffffffffffff, 0xc4c85512, 0x0) getresgid(0x0, 0x0, 0x0) gettid() getgroups(0x2, &(0x7f00000000c0)=[0x0, 0xffffffffffffffff]) r0 = socket$inet6(0xa, 0x400000000001, 0x0) close(r0) r1 = socket$inet6_sctp(0xa, 0x801, 0x84) setsockopt$inet_sctp_SCTP_SOCKOPT_BINDX_ADD(r1, 0x84, 0x64, &(0x7f0000cf6fe4)=[@in6={0xa, 0x4e23, 0x0, @loopback}], 0x1c) connect$inet6(r1, &(0x7f0000000080)={0xa, 0x4e23, 0x0, @loopback}, 0x1c) r2 = open(&(0x7f0000000080)='./bus\x00', 0x141042, 0xf89b8fcc1b35afea) ftruncate(r2, 0x200004) openat$dsp(0xffffffffffffff9c, 0x0, 0x0, 0x0) setsockopt$inet_sctp6_SCTP_STREAM_SCHEDULER(r0, 0x84, 0x7b, &(0x7f0000000100)={0x0, 0x2}, 0x8) sendfile(r0, r2, 0x0, 0x80001d00c0d0) [ 58.759255][ T8351] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.788928][ T8358] IPVS: ftp: loaded support on port[0] = 21 [ 58.800671][ T8348] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.913740][ T8348] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.921252][ T8348] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.929433][ T8348] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.936704][ T8348] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.973278][ T3013] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.981821][ T3013] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.001638][ T8361] IPVS: ftp: loaded support on port[0] = 21 [ 59.018402][ T8351] team0: Port device team_slave_0 added [ 59.028310][ T8351] team0: Port device team_slave_1 added [ 59.060795][ T8354] chnl_net:caif_netlink_parms(): no params data found [ 59.119053][ T8351] device hsr_slave_0 entered promiscuous mode [ 59.156706][ T8351] device hsr_slave_1 entered promiscuous mode [ 59.216586][ T8351] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.264995][ T8354] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.272694][ T8354] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.280636][ T8354] device bridge_slave_0 entered promiscuous mode [ 59.317429][ T8354] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.324757][ T8354] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.332638][ T8354] device bridge_slave_1 entered promiscuous mode [ 59.346024][ T8348] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.355492][ T8351] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 59.409939][ T8351] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 59.477485][ T8354] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.493637][ T8348] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.509895][ T8354] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.523105][ T8351] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 59.570502][ T8351] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 59.629523][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.639016][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.675251][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 59.688471][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.698191][ T8360] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.705545][ T8360] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.713342][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 59.722827][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.731954][ T8360] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.739203][ T8360] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.747300][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 59.756050][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 59.764691][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 59.773228][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.784268][ T8360] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 59.794048][ T8354] team0: Port device team_slave_0 added [ 59.860909][ T8354] team0: Port device team_slave_1 added [ 59.870336][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 59.882610][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.945737][ T8358] chnl_net:caif_netlink_parms(): no params data found [ 59.972181][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 59.981428][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 59.990126][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 59.998871][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.007874][ T8361] chnl_net:caif_netlink_parms(): no params data found [ 60.027433][ T8356] chnl_net:caif_netlink_parms(): no params data found [ 60.044150][ T8348] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.108234][ T8354] device hsr_slave_0 entered promiscuous mode [ 60.157319][ T8354] device hsr_slave_1 entered promiscuous mode [ 60.206479][ T8354] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.233885][ T8358] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.241171][ T8358] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.249513][ T8358] device bridge_slave_0 entered promiscuous mode [ 60.280365][ T8358] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.288429][ T8358] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.296093][ T8358] device bridge_slave_1 entered promiscuous mode [ 60.336169][ T8351] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.363660][ T8361] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.372972][ T8361] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.381165][ T8361] device bridge_slave_0 entered promiscuous mode [ 60.389756][ T8356] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.397599][ T8356] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.405559][ T8356] device bridge_slave_0 entered promiscuous mode [ 60.413853][ T8356] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.421429][ T8356] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.430612][ T8356] device bridge_slave_1 entered promiscuous mode [ 60.448838][ T8358] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.464933][ T8361] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.472878][ T8361] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.481571][ T8361] device bridge_slave_1 entered promiscuous mode [ 60.503228][ T8356] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.515642][ T8358] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.530652][ T8361] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.550421][ T8356] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.561614][ T8354] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 60.613799][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 60.621544][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 60.629654][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 60.637835][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.648001][ T8348] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.663076][ T8351] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.671490][ T8361] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.689243][ T8354] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 60.750598][ T8354] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 60.812869][ T8354] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 60.877590][ T8358] team0: Port device team_slave_0 added [ 60.899042][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 60.908207][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.917631][ T2729] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.925054][ T2729] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.941093][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 60.950999][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.960930][ T2729] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.968430][ T2729] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.984097][ T8361] team0: Port device team_slave_0 added [ 60.994031][ T8356] team0: Port device team_slave_0 added [ 61.002163][ T8358] team0: Port device team_slave_1 added [ 61.069463][ T8358] device hsr_slave_0 entered promiscuous mode [ 61.116738][ T8358] device hsr_slave_1 entered promiscuous mode [ 61.186436][ T8358] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.202239][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.210880][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.220677][ T2729] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.233482][ T8361] team0: Port device team_slave_1 added [ 61.244067][ T8356] team0: Port device team_slave_1 added [ 166.276288][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 166.283170][ C0] rcu: 0-...!: (1 GPs behind) idle=926/1/0x4000000000000002 softirq=10914/10916 fqs=40 [ 166.293346][ C0] (t=10500 jiffies g=6289 q=86) [ 166.298571][ C0] rcu: rcu_preempt kthread starved for 10416 jiffies! g6289 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 166.309747][ C0] rcu: RCU grace-period kthread stack dump: [ 166.316338][ C0] rcu_preempt R running task 29104 10 2 0x80004000 [ 166.324264][ C0] Call Trace: [ 166.327556][ C0] __schedule+0x9a0/0xcc0 [ 166.331973][ C0] schedule+0x181/0x210 [ 166.336207][ C0] schedule_timeout+0x14f/0x240 [ 166.341065][ C0] ? run_local_timers+0x120/0x120 [ 166.346447][ C0] rcu_gp_kthread+0xed8/0x1770 [ 166.351221][ C0] kthread+0x332/0x350 [ 166.355641][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 166.360754][ C0] ? kthread_blkcg+0xe0/0xe0 [ 166.365333][ C0] ret_from_fork+0x24/0x30 [ 166.370418][ C0] NMI backtrace for cpu 0 [ 166.374752][ C0] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.4.0-syzkaller #0 [ 166.382719][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 166.393526][ C0] Workqueue: 0x0 (bond0) [ 166.397853][ C0] Call Trace: [ 166.401155][ C0] [ 166.404022][ C0] dump_stack+0x1fb/0x318 [ 166.408355][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 166.413235][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 166.419403][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 166.425462][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 166.431433][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 166.437323][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 166.442425][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 166.447613][ C0] ? trace_hardirqs_off+0x74/0x80 [ 166.452627][ C0] update_process_times+0x12d/0x180 [ 166.457850][ C0] tick_sched_timer+0x263/0x420 [ 166.462882][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.470159][ C0] __hrtimer_run_queues+0x403/0x840 [ 166.475363][ C0] hrtimer_interrupt+0x38c/0xda0 [ 166.480307][ C0] ? debug_smp_processor_id+0x9/0x20 [ 166.485595][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 166.491132][ C0] apic_timer_interrupt+0xf/0x20 [ 166.496054][ C0] [ 166.498996][ C0] RIP: 0010:free_thread_stack+0x133/0x590 [ 166.504704][ C0] Code: 00 ea ff ff 48 01 c7 be 03 00 00 00 e8 06 a2 60 00 e9 5d 04 00 00 e8 5c 2d 2e 00 48 89 df 31 f6 e8 42 af 6e 00 43 80 3c 2e 00 <74> 08 4c 89 e7 e8 43 a4 69 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 [ 166.524535][ C0] RSP: 0018:ffffc90000dd7c30 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 166.533029][ C0] RAX: 0000000000000001 RBX: ffffea00024d6700 RCX: 0000000000000000 [ 166.541062][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00024d6700 [ 166.549468][ C0] RBP: ffffc90000dd7c68 R08: dffffc0000000000 R09: fffffbfff120248a [ 166.557433][ C0] R10: fffffbfff120248a R11: 0000000000000000 R12: ffff8880a2dfb3a0 [ 166.566445][ C0] R13: dffffc0000000000 R14: 1ffff110145bf674 R15: ffff88809fd27668 [ 166.574442][ C0] put_task_stack+0xa3/0x130 [ 166.579021][ C0] finish_task_switch+0x3f1/0x550 [ 166.584301][ C0] __schedule+0x9a8/0xcc0 [ 166.588811][ C0] schedule+0x181/0x210 [ 166.592958][ C0] worker_thread+0x10d6/0x1630 [ 166.597732][ C0] kthread+0x332/0x350 [ 166.601797][ C0] ? rcu_lock_release+0x30/0x30 [ 166.606639][ C0] ? kthread_blkcg+0xe0/0xe0 [ 166.611221][ C0] ret_from_fork+0x24/0x30