[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 43.660508][ T27] audit: type=1800 audit(1575363464.094:25): pid=8064 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 43.691371][ T27] audit: type=1800 audit(1575363464.094:26): pid=8064 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 43.726886][ T27] audit: type=1800 audit(1575363464.094:27): pid=8064 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 '10.128.10.2' (ECDSA) to the list of known hosts. 2019/12/03 08:57:54 fuzzer started 2019/12/03 08:57:56 dialing manager at 10.128.0.26:38907 2019/12/03 08:57:56 syscalls: 2697 2019/12/03 08:57:56 code coverage: enabled 2019/12/03 08:57:56 comparison tracing: enabled 2019/12/03 08:57:56 extra coverage: extra coverage is not supported by the kernel 2019/12/03 08:57:56 setuid sandbox: enabled 2019/12/03 08:57:56 namespace sandbox: enabled 2019/12/03 08:57:56 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 08:57:56 fault injection: enabled 2019/12/03 08:57:56 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 08:57:56 net packet injection: enabled 2019/12/03 08:57:56 net device setup: enabled 2019/12/03 08:57:56 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 08:57:56 devlink PCI setup: PCI device 0000:00:10.0 is not available 08:57:57 executing program 0: socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000280)={0xffffffffffffffff, 0xffffffffffffffff}) r1 = dup(r0) perf_event_open(&(0x7f0000000040)={0x2, 0x70, 0x1f, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0x0, 0xffffffffffffffff, 0x0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) socket(0x3, 0x0, 0x0) 08:57:57 executing program 1: socketpair$unix(0x1, 0x3, 0x0, &(0x7f0000000280)={0xffffffffffffffff, 0xffffffffffffffff}) r2 = fcntl$dupfd(r1, 0x0, r0) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) bpf$BPF_PROG_DETACH(0x9, &(0x7f0000000040)={0x0, 0xffffffffffffffff, 0x3}, 0x10) syzkaller login: [ 57.276975][ T8228] IPVS: ftp: loaded support on port[0] = 21 [ 57.401599][ T8228] chnl_net:caif_netlink_parms(): no params data found 08:57:57 executing program 2: r0 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1) getsockopt$bt_hci(r0, 0x0, 0x0, 0x0, 0x0) [ 57.487567][ T8228] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.495167][ T8228] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.504502][ T8231] IPVS: ftp: loaded support on port[0] = 21 [ 57.545621][ T8228] device bridge_slave_0 entered promiscuous mode [ 57.569719][ T8228] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.576943][ T8228] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.584717][ T8228] device bridge_slave_1 entered promiscuous mode [ 57.633910][ T8228] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.667140][ T8228] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link 08:57:58 executing program 3: r0 = socket$inet6(0xa, 0x80003, 0xff) ioctl(r0, 0x1000008912, &(0x7f0000000080)="0800b5055e0bcfe87b2071") bpf$PROG_LOAD(0x5, &(0x7f0000000100)={0xd, 0x4, &(0x7f0000000000)=@framed={{}, [@call={0x63, 0x11, 0x4}]}, &(0x7f00000000c0)='GPL\x00', 0x4, 0x1000, &(0x7f0000000200)=""/4096, 0x0, 0x4, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0}, 0x70) [ 57.720898][ T8228] team0: Port device team_slave_0 added [ 57.738434][ T8228] team0: Port device team_slave_1 added [ 57.749107][ T8233] IPVS: ftp: loaded support on port[0] = 21 [ 57.828013][ T8228] device hsr_slave_0 entered promiscuous mode [ 57.885714][ T8228] device hsr_slave_1 entered promiscuous mode 08:57:58 executing program 4: perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x41bf, 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) r0 = fsopen(&(0x7f0000000400)='devpts\x00', 0x0) fsmount(0xffffffffffffffff, 0x0, 0x0) fsconfig$FSCONFIG_SET_STRING(0xffffffffffffffff, 0x6, 0x0, 0x0, 0x0) r1 = syz_open_dev$usbfs(&(0x7f0000000840)='/dev/bus/usb/00#/00#\x00', 0x908, 0x40000) dup2(r0, r1) mq_timedreceive(0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0) r2 = openat$hwrng(0xffffffffffffff9c, &(0x7f0000000000)='/dev/hwrng\x00', 0x204080, 0x0) setsockopt$inet_sctp6_SCTP_DISABLE_FRAGMENTS(r2, 0x84, 0x8, &(0x7f0000000040)=0x101, 0x4) r3 = creat(&(0x7f0000000000)='./bus\x00', 0x0) fcntl$setstatus(r3, 0x4, 0x6000) io_setup(0x1ff, &(0x7f00000004c0)=0x0) r5 = syz_open_procfs(0x0, &(0x7f0000000100)='net/arp\x00') lseek(r5, 0x2, 0x0) getresuid(&(0x7f0000000240), &(0x7f0000000280), &(0x7f00000002c0)) sendfile(0xffffffffffffffff, r5, 0x0, 0x80000000) ioctl$VIDIOC_QBUF(0xffffffffffffffff, 0xc058560f, &(0x7f00000001c0)={0xffffffe0, 0x4, 0x4, 0x10, {0x77359400}, {0x0, 0x0, 0x6, 0x14, 0x2, 0xe8, "02eeb70a"}, 0xff, 0x3, @planes=&(0x7f0000000180)={0xb604, 0x400, @fd=r3, 0x200}, 0x4}) ioctl$FS_IOC_RESVSP(r3, 0x40305828, &(0x7f0000000100)={0x0, 0x0, 0x35b2, 0xe0b7}) io_submit(r4, 0x1, &(0x7f0000000540)=[&(0x7f00000000c0)={0x0, 0x0, 0x0, 0x1, 0x0, r3, &(0x7f0000000000), 0x10000}]) socket$inet(0x2, 0xa, 0x0) [ 57.971992][ T8235] IPVS: ftp: loaded support on port[0] = 21 [ 58.072711][ T8231] chnl_net:caif_netlink_parms(): no params data found [ 58.103877][ T8228] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.160323][ T8228] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.199517][ T8228] netdevsim netdevsim0 netdevsim2: renamed from eth2 08:57:58 executing program 5: r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000040)='/dev/ptmx\x00', 0x0, 0x0) ioctl$TCSETS(r0, 0x40045431, &(0x7f0000000080)) r1 = syz_open_pts(r0, 0x0) ioctl$TIOCSETD(r1, 0x5423, &(0x7f0000000100)=0x1b) ioctl$TCSETSF(r1, 0x5412, &(0x7f00000001c0)) [ 58.272969][ T8228] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.284683][ T8239] IPVS: ftp: loaded support on port[0] = 21 [ 58.433983][ T8233] chnl_net:caif_netlink_parms(): no params data found [ 58.468387][ T8241] IPVS: ftp: loaded support on port[0] = 21 [ 58.484265][ T8231] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.491519][ T8231] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.500102][ T8231] device bridge_slave_0 entered promiscuous mode [ 58.507736][ T8231] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.514774][ T8231] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.523023][ T8231] device bridge_slave_1 entered promiscuous mode [ 58.543014][ T8233] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.550850][ T8233] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.558576][ T8233] device bridge_slave_0 entered promiscuous mode [ 58.589310][ T8231] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.599866][ T8233] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.607111][ T8233] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.614677][ T8233] device bridge_slave_1 entered promiscuous mode [ 58.640529][ T8231] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.689866][ T8231] team0: Port device team_slave_0 added [ 58.697361][ T8231] team0: Port device team_slave_1 added [ 58.717609][ T8233] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.729619][ T8233] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.753064][ T8233] team0: Port device team_slave_0 added [ 58.760539][ T8233] team0: Port device team_slave_1 added [ 58.798055][ T8231] device hsr_slave_0 entered promiscuous mode [ 58.855752][ T8231] device hsr_slave_1 entered promiscuous mode [ 58.905512][ T8231] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.932411][ T8235] chnl_net:caif_netlink_parms(): no params data found [ 58.952328][ T8239] chnl_net:caif_netlink_parms(): no params data found [ 59.023484][ T8235] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.031111][ T8235] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.041205][ T8235] device bridge_slave_0 entered promiscuous mode [ 59.066072][ T8231] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 59.158056][ T8233] device hsr_slave_0 entered promiscuous mode [ 59.205686][ T8233] device hsr_slave_1 entered promiscuous mode [ 59.255435][ T8233] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.267503][ T8228] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.277901][ T8235] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.285048][ T8235] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.293005][ T8235] device bridge_slave_1 entered promiscuous mode [ 59.331860][ T8231] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 59.379360][ T8231] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 59.417870][ T8239] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.424919][ T8239] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.433489][ T8239] device bridge_slave_0 entered promiscuous mode [ 59.441486][ T8239] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.449043][ T8239] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.458686][ T8239] device bridge_slave_1 entered promiscuous mode [ 59.479794][ T8231] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 59.544755][ T8235] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.559790][ T8235] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.573807][ T8243] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.582822][ T8243] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.592969][ T8228] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.604925][ T8241] chnl_net:caif_netlink_parms(): no params data found [ 59.614942][ T8239] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.630787][ T8239] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.657052][ T8239] team0: Port device team_slave_0 added [ 59.663092][ T8243] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 59.672563][ T8243] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.681422][ T8243] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.688603][ T8243] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.708802][ T8243] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 59.724055][ T8233] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 59.788657][ T8239] team0: Port device team_slave_1 added [ 59.794435][ T8233] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 59.855103][ T8235] team0: Port device team_slave_0 added [ 59.865152][ T8235] team0: Port device team_slave_1 added [ 59.872023][ T8233] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 59.948856][ T8233] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 60.008876][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 60.028120][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.036763][ T8247] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.044335][ T8247] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.098422][ T8239] device hsr_slave_0 entered promiscuous mode [ 60.135819][ T8239] device hsr_slave_1 entered promiscuous mode [ 60.175965][ T8239] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.227865][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 60.237467][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 60.264504][ T8241] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.272737][ T8241] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.281483][ T8241] device bridge_slave_0 entered promiscuous mode [ 60.290012][ T8241] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.297557][ T8241] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.305529][ T8241] device bridge_slave_1 entered promiscuous mode [ 60.323733][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 60.333132][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.377468][ T8235] device hsr_slave_0 entered promiscuous mode [ 60.425806][ T8235] device hsr_slave_1 entered promiscuous mode [ 60.465531][ T8235] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.482809][ T8241] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.499656][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.517854][ T8241] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.529671][ T8239] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 60.557518][ T8239] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 60.597551][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 60.607041][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.615492][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 60.623889][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.639941][ T8228] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 60.653081][ T8228] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.670806][ T8239] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 60.730126][ T3091] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 60.739258][ T3091] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.770703][ T8241] team0: Port device team_slave_0 added [ 60.780378][ T8239] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 60.843386][ T8231] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.856078][ T8241] team0: Port device team_slave_1 added [ 60.938394][ T8241] device hsr_slave_0 entered promiscuous mode [ 60.996560][ T8241] device hsr_slave_1 entered promiscuous mode [ 61.035497][ T8241] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.046786][ T8235] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 61.100655][ T8235] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 61.149542][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 61.157185][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 61.164649][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.173183][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.184198][ T8228] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 61.196390][ T8231] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.206730][ T8235] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 61.238182][ T8235] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 61.330611][ T8233] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.351277][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.360237][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.370727][ T8247] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.378139][ T8247] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.387044][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.395775][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.404149][ T8247] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.411344][ T8247] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.419703][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.428369][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.437294][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.446083][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.454878][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.463162][ T8247] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.481759][ T8233] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.511276][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.523036][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.534909][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.551298][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.560885][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.580458][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.590863][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.604338][ T8236] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.622320][ T8231] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.664139][ T8231] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 166.555297][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 166.562146][ C0] rcu: 0-...!: (10499 ticks this GP) idle=13a/1/0x4000000000000002 softirq=10659/10659 fqs=42 [ 166.572809][ C0] (t=10501 jiffies g=6361 q=196) [ 166.577834][ C0] rcu: rcu_preempt kthread starved for 10418 jiffies! g6361 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 166.588921][ C0] rcu: RCU grace-period kthread stack dump: [ 166.594799][ C0] rcu_preempt R running task 29032 10 2 0x80004000 [ 166.602687][ C0] Call Trace: [ 166.606087][ C0] __schedule+0x9a0/0xcc0 [ 166.610495][ C0] schedule+0x181/0x210 [ 166.614664][ C0] schedule_timeout+0x14f/0x240 [ 166.619513][ C0] ? run_local_timers+0x120/0x120 [ 166.624529][ C0] rcu_gp_kthread+0xed8/0x1770 [ 166.629820][ C0] kthread+0x332/0x350 [ 166.634481][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 166.639578][ C0] ? kthread_blkcg+0xe0/0xe0 [ 166.644155][ C0] ret_from_fork+0x24/0x30 [ 166.648571][ C0] NMI backtrace for cpu 0 [ 166.652909][ C0] CPU: 0 PID: 8228 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 [ 166.661139][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 166.671283][ C0] Call Trace: [ 166.675162][ C0] [ 166.678010][ C0] dump_stack+0x1fb/0x318 [ 166.682334][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 166.687174][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 166.693318][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 166.699371][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 166.705341][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 166.711220][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 166.716325][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 166.721536][ C0] ? trace_hardirqs_off+0x74/0x80 [ 166.726561][ C0] update_process_times+0x12d/0x180 [ 166.731835][ C0] tick_sched_timer+0x263/0x420 [ 166.736677][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.742224][ C0] __hrtimer_run_queues+0x403/0x840 [ 166.747448][ C0] hrtimer_interrupt+0x38c/0xda0 [ 166.752410][ C0] ? debug_smp_processor_id+0x9/0x20 [ 166.757692][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 166.763253][ C0] apic_timer_interrupt+0xf/0x20 [ 166.768202][ C0] [ 166.771270][ C0] RIP: 0010:mod_memcg_page_state+0x16/0x190 [ 166.777161][ C0] Code: 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 54 53 41 89 f6 48 89 fb e8 da 28 2e 00 <48> 83 c3 38 48 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 [ 166.796754][ C0] RSP: 0018:ffffc90001eb7ba0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 166.805151][ C0] RAX: ffffffff81487326 RBX: ffffea00025c4d00 RCX: ffff8880a0a241c0 [ 166.813374][ C0] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea00025c4d00 [ 166.821337][ C0] RBP: ffffc90001eb7bc0 R08: 000000000003a768 R09: ffffed10151d92cf [ 166.829296][ C0] R10: ffffed10151d92cf R11: 0000000000000000 R12: ffff88809c231520 [ 166.837262][ C0] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff8880a8ec9668 [ 166.845235][ C0] ? mod_memcg_page_state+0x16/0x190 [ 166.850515][ C0] free_thread_stack+0x168/0x590 [ 166.855443][ C0] put_task_stack+0xa3/0x130 [ 166.860023][ C0] finish_task_switch+0x3f1/0x550 [ 166.865042][ C0] __schedule+0x9a8/0xcc0 [ 166.869371][ C0] schedule+0x181/0x210 [ 166.873520][ C0] do_nanosleep+0x1d0/0x6c0 [ 166.878023][ C0] hrtimer_nanosleep+0x3a6/0x5b0 [ 166.882955][ C0] ? trace_hrtimer_expire_exit+0x2d0/0x2d0 [ 166.888755][ C0] __x64_sys_nanosleep+0x186/0x1d0 [ 166.893860][ C0] do_syscall_64+0xf7/0x1c0 [ 166.898356][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 166.904236][ C0] RIP: 0033:0x458b20 [ 166.908115][ C0] Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d 11 fe 61 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 d1 fb ff c3 48 83 ec 08 e8 ea 46 00 00 [ 166.927710][ C0] RSP: 002b:00007ffdd457f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 166.936109][ C0] RAX: ffffffffffffffda RBX: 000000000000f05a RCX: 0000000000458b20 [ 166.944066][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffdd457f030 [ 166.952025][ C0] RBP: 0000000000000002 R08: 0000000000000001 R09: 00000000018fe940 [ 166.959985][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 [ 166.967967][ C0] R13: 00007ffdd457f080 R14: 000000000000f049 R15: 00007ffdd457f090