[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.203' (ECDSA) to the list of known hosts.
2021/04/08 08:42:04 fuzzer started
2021/04/08 08:42:05 dialing manager at 10.128.0.163:45381
2021/04/08 08:42:05 syscalls: 3557
2021/04/08 08:42:05 code coverage: enabled
2021/04/08 08:42:05 comparison tracing: enabled
2021/04/08 08:42:05 extra coverage: enabled
2021/04/08 08:42:05 setuid sandbox: enabled
2021/04/08 08:42:05 namespace sandbox: enabled
2021/04/08 08:42:05 Android sandbox: /sys/fs/selinux/policy does not exist
2021/04/08 08:42:05 fault injection: enabled
2021/04/08 08:42:05 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2021/04/08 08:42:05 net packet injection: enabled
2021/04/08 08:42:05 net device setup: enabled
2021/04/08 08:42:05 concurrency sanitizer: enabled
2021/04/08 08:42:05 devlink PCI setup: PCI device 0000:00:10.0 is not available
2021/04/08 08:42:05 USB emulation: enabled
2021/04/08 08:42:05 hci packet injection: enabled
2021/04/08 08:42:05 wifi device emulation: enabled
2021/04/08 08:42:05 802.15.4 emulation: enabled
2021/04/08 08:42:06 suppressing KCSAN reports in functions: 'ext4_free_inode' 'blk_mq_rq_ctx_init' 'ext4_free_inodes_count' '__filemap_fdatawrite_range' 'expire_timers' 'xas_clear_mark' 'ext4_mb_good_group' 'generic_write_end' '__xa_clear_mark' '__ext4_new_inode' 'blk_mq_dispatch_rq_list' 'blk_mq_sched_dispatch_requests' 
2021/04/08 08:42:06 fetching corpus: 0, signal 0/2000 (executing program)
2021/04/08 08:42:07 fetching corpus: 49, signal 20972/24599 (executing program)
2021/04/08 08:42:07 fetching corpus: 99, signal 38181/43209 (executing program)
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2021/04/08 08:42:08 fetching corpus: 896, signal 116499/135983 (executing program)
syzkaller login: [   33.839213][ T8373] ==================================================================
[   33.847334][ T8373] BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me
[   33.854859][ T8373] 
[   33.857159][ T8373] write to 0xffff888105ec302c of 4 bytes by task 8375 on cpu 0:
[   33.864758][ T8373]  futex_wait_queue_me+0x186/0x250
[   33.869847][ T8373]  futex_wait+0x145/0x400
[   33.874154][ T8373]  do_futex+0x1062/0x1cd0
[   33.878457][ T8373]  __se_sys_futex+0x2a8/0x390
[   33.883109][ T8373]  __x64_sys_futex+0x74/0x80
[   33.887707][ T8373]  do_syscall_64+0x39/0x80
[   33.892098][ T8373]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   33.897981][ T8373] 
[   33.900279][ T8373] read to 0xffff888105ec302c of 4 bytes by task 8373 on cpu 1:
[   33.907793][ T8373]  __send_signal+0x27f/0x790
[   33.912384][ T8373]  send_signal+0x398/0x3e0
[   33.916774][ T8373]  do_send_sig_info+0x9b/0xe0
[   33.921441][ T8373]  do_send_specific+0xc7/0x100
[   33.926190][ T8373]  __x64_sys_tgkill+0x108/0x140
[   33.931018][ T8373]  do_syscall_64+0x39/0x80
2021/04/08 08:42:08 fetching corpus: 946, signal 119006/139092 (executing program)
[   33.935408][ T8373]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   33.941364][ T8373] 
[   33.943672][ T8373] Reported by Kernel Concurrency Sanitizer on:
[   33.949789][ T8373] CPU: 1 PID: 8373 Comm: syz-fuzzer Not tainted 5.12.0-rc6-syzkaller #0
[   33.958089][ T8373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.968206][ T8373] ==================================================================
2021/04/08 08:42:08 fetching corpus: 996, signal 121805/142372 (executing program)
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2021/04/08 08:42:15 starting 6 fuzzer processes
08:42:15 executing program 0:
mmap(&(0x7f0000008000/0x600000)=nil, 0x600000, 0x800002, 0x10, 0xffffffffffffffff, 0x0)
fallocate(0xffffffffffffffff, 0x0, 0x0, 0x0)
perf_event_open(&(0x7f0000000700)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7, 0x0, 0x0, 0x0, 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, @perf_config_ext}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0)
write(0xffffffffffffffff, 0x0, 0x0)
fcntl$setpipe(0xffffffffffffffff, 0x407, 0x0)
vmsplice(0xffffffffffffffff, &(0x7f0000000000)=[{0x0}], 0x1, 0x0)
r0 = syz_open_dev$sg(&(0x7f0000000180)='/dev/sg#\x00', 0x0, 0x5)
writev(r0, &(0x7f0000000000)=[{&(0x7f0000000100)="ae88bff8240200005a90f57f07703aeff0f64ebbee07962c22772e11b44e69d90cf41bdd2ac8bb8c43b460e46292", 0x2e}, {&(0x7f0000000040)="53000000fcffffff7704030000002000000000100000000000004000000000000800", 0x22}], 0x2)

08:42:15 executing program 1:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0)
mmap(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1800003, 0x12, r0, 0x0)
preadv(r0, &(0x7f0000000280), 0x18, 0xd9f, 0x0)
mount_setattr(0xffffffffffffffff, 0x0, 0x0, &(0x7f00000001c0)={0x0, 0x74}, 0x20)

08:42:15 executing program 2:
r0 = socket$inet_udp(0x2, 0x2, 0x0)
setsockopt$inet_opts(r0, 0x0, 0x4, &(0x7f0000000240)="070a052208c559771f", 0x9)
getsockopt$inet_opts(r0, 0x0, 0x4, 0x0, &(0x7f0000000200))

08:42:15 executing program 3:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0)
mmap(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1800003, 0x12, r1, 0x0)
preadv(r1, &(0x7f0000000280), 0x13, 0xd9f, 0x0)
sendmsg$IPSET_CMD_CREATE(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000040)={0x4c, 0x2, 0x6, 0x101, 0x6c, 0xf0ffff, {}, [@IPSET_ATTR_FAMILY={0x5, 0x5, 0x2}, @IPSET_ATTR_PROTOCOL={0x5, 0x1, 0x6}, @IPSET_ATTR_TYPENAME={0x13, 0x3, 'hash:net,iface\x00'}, @IPSET_ATTR_SETNAME={0x9, 0x2, 'syz2\x00'}, @IPSET_ATTR_REVISION={0x5}]}, 0x4c}}, 0x0)

08:42:15 executing program 4:
r0 = openat$zero(0xffffffffffffff9c, &(0x7f0000000000)='/dev/zero\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0)
mmap(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x2800004, 0x12, r1, 0x0)
preadv(r0, &(0x7f0000000280)=[{0x0}], 0x1, 0x0, 0x0)
mmap(&(0x7f0000000000/0xfbe000)=nil, 0xfbe000, 0x7, 0x31, 0xffffffffffffffff, 0x0)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = socket$nl_generic(0x10, 0x3, 0x10)
r4 = syz_genetlink_get_family_id$team(&(0x7f0000000040)='team\x00', 0xffffffffffffffff)
ioctl$ifreq_SIOCGIFINDEX_team(r2, 0x8933, &(0x7f0000000380)={'team0\x00', <r5=>0x0})
sendmsg$TEAM_CMD_OPTIONS_SET(r3, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000003c0)={0x5c, r4, 0x1, 0x0, 0x0, {}, [{{0x8, 0x1, r5}, {0x40, 0x2, 0x0, 0x1, [{0x3c, 0x1, @name={{0x24, 0x1, 'mode\x00'}, {0x5}, {0xb, 0x4, 'random\x00'}}}]}}]}, 0x5c}, 0x1, 0x4}, 0x0)

08:42:16 executing program 5:
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r2 = syz_genetlink_get_family_id$netlbl_unlabel(&(0x7f00000001c0)='NLBL_UNLBL\x00', r1)
sendmsg$NLBL_UNLABEL_C_STATICADDDEF(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)=ANY=[@ANYBLOB='L\x00\x00\x00', @ANYRES16=r2, @ANYBLOB="dd040000000000000000060000000f0007003a6e636f6e66696e6564000014000200fc00020087f980f48a2e966d00000000140003"], 0x4c}}, 0x0)

[   41.965281][ T8397] IPVS: ftp: loaded support on port[0] = 21
[   42.049296][ T8397] chnl_net:caif_netlink_parms(): no params data found
[   42.083379][ T8397] bridge0: port 1(bridge_slave_0) entered blocking state
[   42.090421][ T8397] bridge0: port 1(bridge_slave_0) entered disabled state
[   42.097999][ T8397] device bridge_slave_0 entered promiscuous mode
[   42.105705][ T8397] bridge0: port 2(bridge_slave_1) entered blocking state
[   42.115249][ T8397] bridge0: port 2(bridge_slave_1) entered disabled state
[   42.122729][ T8397] device bridge_slave_1 entered promiscuous mode
[   42.137031][ T8397] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   42.147835][ T8397] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   42.167624][ T8399] IPVS: ftp: loaded support on port[0] = 21
[   42.172677][ T8397] team0: Port device team_slave_0 added
[   42.180189][ T8397] team0: Port device team_slave_1 added
[   42.193110][ T8397] batman_adv: batadv0: Adding interface: batadv_slave_0
[   42.200041][ T8397] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[   42.225931][ T8397] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   42.238765][ T8397] batman_adv: batadv0: Adding interface: batadv_slave_1
[   42.245747][ T8397] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[   42.272245][ T8397] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   42.323618][ T8397] device hsr_slave_0 entered promiscuous mode
[   42.333113][ T8401] IPVS: ftp: loaded support on port[0] = 21
[   42.342415][ T8397] device hsr_slave_1 entered promiscuous mode
[   42.389814][ T8399] chnl_net:caif_netlink_parms(): no params data found
[   42.463799][ T8401] chnl_net:caif_netlink_parms(): no params data found
[   42.473024][ T8399] bridge0: port 1(bridge_slave_0) entered blocking state
[   42.487654][ T8399] bridge0: port 1(bridge_slave_0) entered disabled state
[   42.495333][ T8399] device bridge_slave_0 entered promiscuous mode
[   42.520410][ T8403] IPVS: ftp: loaded support on port[0] = 21
[   42.528255][ T8399] bridge0: port 2(bridge_slave_1) entered blocking state
[   42.535663][ T8399] bridge0: port 2(bridge_slave_1) entered disabled state
[   42.543327][ T8399] device bridge_slave_1 entered promiscuous mode
[   42.552709][ T8397] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   42.576643][ T8397] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   42.585952][ T8397] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   42.594821][ T8401] bridge0: port 1(bridge_slave_0) entered blocking state
[   42.601901][ T8401] bridge0: port 1(bridge_slave_0) entered disabled state
[   42.609172][ T8401] device bridge_slave_0 entered promiscuous mode
[   42.616708][ T8399] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   42.626700][ T8397] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   42.638965][ T8401] bridge0: port 2(bridge_slave_1) entered blocking state
[   42.646031][ T8401] bridge0: port 2(bridge_slave_1) entered disabled state
[   42.653699][ T8401] device bridge_slave_1 entered promiscuous mode
[   42.660907][ T8399] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   42.708368][ T8399] team0: Port device team_slave_0 added
[   42.715134][ T8399] team0: Port device team_slave_1 added
[   42.721438][ T8401] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   42.739735][ T8401] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   42.763954][ T8405] IPVS: ftp: loaded support on port[0] = 21
[   42.797747][ T8397] bridge0: port 2(bridge_slave_1) entered blocking state
[   42.804831][ T8397] bridge0: port 2(bridge_slave_1) entered forwarding state
[   42.812075][ T8397] bridge0: port 1(bridge_slave_0) entered blocking state
[   42.819091][ T8397] bridge0: port 1(bridge_slave_0) entered forwarding state
[   42.864386][ T8399] batman_adv: batadv0: Adding interface: batadv_slave_0
[   42.871372][ T8399] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[   42.897383][ T8399] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   42.910076][ T8399] batman_adv: batadv0: Adding interface: batadv_slave_1
[   42.917016][ T8399] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[   42.943133][ T8399] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   42.962344][ T8401] team0: Port device team_slave_0 added
[   42.972906][ T8403] chnl_net:caif_netlink_parms(): no params data found
[   42.982674][ T8401] team0: Port device team_slave_1 added
[   42.995611][ T8407] IPVS: ftp: loaded support on port[0] = 21
[   43.030526][ T8399] device hsr_slave_0 entered promiscuous mode
[   43.037098][ T8399] device hsr_slave_1 entered promiscuous mode
[   43.043918][ T8399] debugfs: Directory 'hsr0' with parent 'hsr' already present!
[   43.051449][ T8399] Cannot create hsr debugfs directory
[   43.071541][ T8401] batman_adv: batadv0: Adding interface: batadv_slave_0
[   43.078643][ T8401] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[   43.104694][ T8401] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   43.143906][ T4848] bridge0: port 1(bridge_slave_0) entered disabled state
[   43.152450][ T4848] bridge0: port 2(bridge_slave_1) entered disabled state
[   43.164273][ T8401] batman_adv: batadv0: Adding interface: batadv_slave_1
[   43.171198][ T8401] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[   43.197206][ T8401] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   43.226001][ T8401] device hsr_slave_0 entered promiscuous mode
[   43.232597][ T8401] device hsr_slave_1 entered promiscuous mode
[   43.238933][ T8401] debugfs: Directory 'hsr0' with parent 'hsr' already present!
[   43.246711][ T8401] Cannot create hsr debugfs directory
[   43.253678][ T8403] bridge0: port 1(bridge_slave_0) entered blocking state
[   43.260722][ T8403] bridge0: port 1(bridge_slave_0) entered disabled state
[   43.268421][ T8403] device bridge_slave_0 entered promiscuous mode
[   43.276877][ T8403] bridge0: port 2(bridge_slave_1) entered blocking state
[   43.283940][ T8403] bridge0: port 2(bridge_slave_1) entered disabled state
[   43.291387][ T8403] device bridge_slave_1 entered promiscuous mode
[   43.312815][ T8397] 8021q: adding VLAN 0 to HW filter on device bond0
[   43.326849][ T8405] chnl_net:caif_netlink_parms(): no params data found
[   43.364825][ T8403] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   43.384979][ T8403] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   43.396233][   T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
[   43.403834][   T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   43.412812][ T8397] 8021q: adding VLAN 0 to HW filter on device team0
[   43.419786][ T8399] netdevsim netdevsim1 netdevsim0: renamed from eth0
[   43.435984][ T8399] netdevsim netdevsim1 netdevsim1: renamed from eth1
[   43.461981][ T8399] netdevsim netdevsim1 netdevsim2: renamed from eth2
[   43.473271][ T8407] chnl_net:caif_netlink_parms(): no params data found
[   43.494484][   T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   43.503105][   T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[   43.511312][   T36] bridge0: port 1(bridge_slave_0) entered blocking state
[   43.518340][   T36] bridge0: port 1(bridge_slave_0) entered forwarding state
[   43.531918][ T8403] team0: Port device team_slave_0 added
[   43.537653][ T8399] netdevsim netdevsim1 netdevsim3: renamed from eth3
[   43.555959][ T8405] bridge0: port 1(bridge_slave_0) entered blocking state
[   43.563099][ T8405] bridge0: port 1(bridge_slave_0) entered disabled state
[   43.570458][ T8405] device bridge_slave_0 entered promiscuous mode
[   43.579308][ T8405] bridge0: port 2(bridge_slave_1) entered blocking state
[   43.587215][ T8405] bridge0: port 2(bridge_slave_1) entered disabled state
[   43.594833][ T8405] device bridge_slave_1 entered promiscuous mode
[   43.602365][ T8403] team0: Port device team_slave_1 added
[   43.615098][   T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   43.623698][   T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[   43.632375][   T36] bridge0: port 2(bridge_slave_1) entered blocking state
[   43.639380][   T36] bridge0: port 2(bridge_slave_1) entered forwarding state
[   43.647176][   T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready
[   43.669376][ T8407] bridge0: port 1(bridge_slave_0) entered blocking state
[   43.676864][ T8407] bridge0: port 1(bridge_slave_0) entered disabled state
[   43.684514][ T8407] device bridge_slave_0 entered promiscuous mode
[   43.693958][ T8407] bridge0: port 2(bridge_slave_1) entered blocking state
[   43.700977][ T8407] bridge0: port 2(bridge_slave_1) entered disabled state
[   43.709021][ T8407] device bridge_slave_1 entered promiscuous mode
[   43.733653][ T8405] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   43.744109][ T8403] batman_adv: batadv0: Adding interface: batadv_slave_0
[   43.751041][ T8403] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[   43.777399][ T8403] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   43.788618][   T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready
[   43.799659][ T8407] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   43.812120][ T8401] netdevsim netdevsim2 netdevsim0: renamed from eth0
[   43.820956][ T8405] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   43.830763][ T8403] batman_adv: batadv0: Adding interface: batadv_slave_1
[   43.837995][ T8403] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[   43.864317][ T8403] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active