[info] Using makefile-style concurrent boot in runlevel 2. [ 26.808144] audit: type=1800 audit(1544582811.845:21): pid=5848 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.176' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 syzkaller login: [ 52.425296] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 52.663844] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.670812] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.677982] device bridge_slave_0 entered promiscuous mode [ 52.696350] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.702731] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.709851] device bridge_slave_1 entered promiscuous mode [ 52.726847] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 52.744383] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 52.794071] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 52.814155] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 52.886828] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 52.894467] team0: Port device team_slave_0 added [ 52.911102] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 52.918376] team0: Port device team_slave_1 added [ 52.935745] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 52.958171] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 52.976370] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 52.996929] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 53.135810] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.142359] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.149377] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.155737] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 53.655560] 8021q: adding VLAN 0 to HW filter on device bond0 [ 53.706072] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.756594] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 53.762833] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 53.771481] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.814747] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 54.355546] ================================================================== [ 54.363170] BUG: KASAN: use-after-free in tipc_group_bc_cong+0x327/0x3f0 [ 54.370001] Read of size 2 at addr ffff8881cdd6fd74 by task syz-executor932/6262 [ 54.377512] [ 54.379129] CPU: 0 PID: 6262 Comm: syz-executor932 Not tainted 4.20.0-rc6+ #150 [ 54.386560] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.395896] Call Trace: [ 54.398473] dump_stack+0x244/0x39d [ 54.402102] ? dump_stack_print_info.cold.1+0x20/0x20 [ 54.407282] ? printk+0xa7/0xcf [ 54.410550] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 54.415289] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 54.420451] print_address_description.cold.7+0x9/0x1ff [ 54.425880] kasan_report.cold.8+0x242/0x309 [ 54.430280] ? tipc_group_bc_cong+0x327/0x3f0 [ 54.434765] __asan_report_load2_noabort+0x14/0x20 [ 54.439682] tipc_group_bc_cong+0x327/0x3f0 [ 54.444132] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 54.449224] ? tipc_group_cong+0x5d0/0x5d0 [ 54.453459] ? remove_wait_queue+0x1a6/0x360 [ 54.457874] ? add_wait_queue+0x2b0/0x2b0 [ 54.462009] ? __local_bh_enable_ip+0x160/0x260 [ 54.466669] tipc_send_group_bcast+0x50a/0xd90 [ 54.471258] ? tipc_sk_sock_err.isra.61+0x2f0/0x2f0 [ 54.476267] ? __init_waitqueue_head+0x150/0x150 [ 54.481015] ? refill_pi_state_cache.part.8+0x310/0x310 [ 54.486380] ? mark_held_locks+0x130/0x130 [ 54.490603] ? futex_wait_setup+0x266/0x3e0 [ 54.494916] ? futex_wake+0x760/0x760 [ 54.498719] ? print_usage_bug+0xc0/0xc0 [ 54.502770] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 54.507955] __tipc_sendmsg+0xeec/0x1d40 [ 54.512057] ? futex_wait+0x5ec/0xa50 [ 54.515860] ? tipc_sendmcast+0xf50/0xf50 [ 54.520057] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 54.525242] ? zap_class+0x640/0x640 [ 54.528949] ? print_usage_bug+0xc0/0xc0 [ 54.533010] ? find_held_lock+0x36/0x1c0 [ 54.537066] ? find_held_lock+0x36/0x1c0 [ 54.541113] ? mark_held_locks+0xc7/0x130 [ 54.545245] ? __local_bh_enable_ip+0x160/0x260 [ 54.549924] ? __local_bh_enable_ip+0x160/0x260 [ 54.554581] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 54.559149] ? trace_hardirqs_on+0xbd/0x310 [ 54.563452] ? lock_release+0xa00/0xa00 [ 54.567406] ? lock_sock_nested+0xe2/0x120 [ 54.571632] ? trace_hardirqs_off_caller+0x310/0x310 [ 54.576724] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.582316] ? check_preemption_disabled+0x48/0x280 [ 54.587323] ? lock_sock_nested+0x9a/0x120 [ 54.591539] ? lock_sock_nested+0x9a/0x120 [ 54.595766] ? __local_bh_enable_ip+0x160/0x260 [ 54.600424] tipc_sendmsg+0x50/0x70 [ 54.604036] ? __tipc_sendmsg+0x1d40/0x1d40 [ 54.608341] sock_sendmsg+0xd5/0x120 [ 54.612045] ___sys_sendmsg+0x7fd/0x930 [ 54.616015] ? find_held_lock+0x36/0x1c0 [ 54.620060] ? copy_msghdr_from_user+0x580/0x580 [ 54.624798] ? __fd_install+0x2b5/0x8f0 [ 54.628760] ? check_preemption_disabled+0x48/0x280 [ 54.633765] ? __fget_light+0x2e9/0x430 [ 54.637726] ? fget_raw+0x20/0x20 [ 54.641184] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.646711] ? __fd_install+0x2f9/0x8f0 [ 54.650673] ? get_unused_fd_flags+0x1a0/0x1a0 [ 54.655250] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.660772] ? sockfd_lookup_light+0xc5/0x160 [ 54.665251] __sys_sendmsg+0x11d/0x280 [ 54.669130] ? __ia32_sys_shutdown+0x80/0x80 [ 54.673526] ? __x64_sys_futex+0x47f/0x6a0 [ 54.677745] ? do_syscall_64+0x9a/0x820 [ 54.681705] ? do_syscall_64+0x9a/0x820 [ 54.685667] ? trace_hardirqs_off_caller+0x310/0x310 [ 54.690765] __x64_sys_sendmsg+0x78/0xb0 [ 54.694822] do_syscall_64+0x1b9/0x820 [ 54.698702] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 54.704054] ? syscall_return_slowpath+0x5e0/0x5e0 [ 54.708967] ? trace_hardirqs_on_caller+0x310/0x310 [ 54.713967] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 54.718968] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 54.725616] ? __switch_to_asm+0x40/0x70 [ 54.729656] ? __switch_to_asm+0x34/0x70 [ 54.733708] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.738535] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.743705] RIP: 0033:0x447009 [ 54.746922] Code: e8 ec be 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 54.765809] RSP: 002b:00007f498e006ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 54.773501] RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 0000000000447009 [ 54.780752] RDX: 0000000000000000 RSI: 00000000200006c0 RDI: 0000000000000005 [ 54.788005] RBP: 00000000006ddc50 R08: 0000000000000000 R09: 0000000000000000 [ 54.795269] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc5c [ 54.802521] R13: 00007ffc0149482f R14: 00007f498e0079c0 R15: 0000000000000005 [ 54.809781] [ 54.811392] Allocated by task 6263: [ 54.815005] save_stack+0x43/0xd0 [ 54.818441] kasan_kmalloc+0xc7/0xe0 [ 54.822149] kmem_cache_alloc_trace+0x152/0x750 [ 54.826801] tipc_group_create+0x152/0xa70 [ 54.831018] tipc_setsockopt+0x2d1/0xd70 [ 54.835062] __sys_setsockopt+0x1ba/0x3c0 [ 54.839202] __x64_sys_setsockopt+0xbe/0x150 [ 54.843594] do_syscall_64+0x1b9/0x820 [ 54.847461] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.852627] [ 54.854245] Freed by task 6263: [ 54.857511] save_stack+0x43/0xd0 [ 54.860945] __kasan_slab_free+0x102/0x150 [ 54.865208] kasan_slab_free+0xe/0x10 [ 54.868992] kfree+0xcf/0x230 [ 54.872082] tipc_group_delete+0x2e4/0x3f0 [ 54.876296] tipc_sk_leave+0x113/0x220 [ 54.880165] tipc_setsockopt+0x97d/0xd70 [ 54.884208] __sys_setsockopt+0x1ba/0x3c0 [ 54.888349] __x64_sys_setsockopt+0xbe/0x150 [ 54.892742] do_syscall_64+0x1b9/0x820 [ 54.896615] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.901781] [ 54.903394] The buggy address belongs to the object at ffff8881cdd6fd00 [ 54.903394] which belongs to the cache kmalloc-192 of size 192 [ 54.916031] The buggy address is located 116 bytes inside of [ 54.916031] 192-byte region [ffff8881cdd6fd00, ffff8881cdd6fdc0) [ 54.927882] The buggy address belongs to the page: [ 54.932794] page:ffffea0007375bc0 count:1 mapcount:0 mapping:ffff8881da800040 index:0x0 [ 54.940922] flags: 0x2fffc0000000200(slab) [ 54.945143] raw: 02fffc0000000200 ffffea0007377f48 ffffea000738bf88 ffff8881da800040 [ 54.953015] raw: 0000000000000000 ffff8881cdd6f000 0000000100000010 0000000000000000 [ 54.960875] page dumped because: kasan: bad access detected [ 54.966562] [ 54.968168] Memory state around the buggy address: [ 54.973080] ffff8881cdd6fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.980422] ffff8881cdd6fc80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 54.987761] >ffff8881cdd6fd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.995095] ^ [ 55.002102] ffff8881cdd6fd80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 55.009443] ffff8881cdd6fe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.016782] ================================================================== [ 55.024119] Disabling lock debugging due to kernel taint [ 55.033917] Kernel panic - not syncing: panic_on_warn set ... [ 55.039821] CPU: 0 PID: 6262 Comm: syz-executor932 Tainted: G B 4.20.0-rc6+ #150 [ 55.048638] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.057985] Call Trace: [ 55.060560] dump_stack+0x244/0x39d [ 55.064171] ? dump_stack_print_info.cold.1+0x20/0x20 [ 55.069347] panic+0x2ad/0x55c [ 55.072525] ? add_taint.cold.5+0x16/0x16 [ 55.076664] ? preempt_schedule+0x4d/0x60 [ 55.081178] ? ___preempt_schedule+0x16/0x18 [ 55.085570] ? trace_hardirqs_on+0xb4/0x310 [ 55.089873] kasan_end_report+0x47/0x4f [ 55.093828] kasan_report.cold.8+0x76/0x309 [ 55.098132] ? tipc_group_bc_cong+0x327/0x3f0 [ 55.102614] __asan_report_load2_noabort+0x14/0x20 [ 55.107527] tipc_group_bc_cong+0x327/0x3f0 [ 55.111828] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 55.116914] ? tipc_group_cong+0x5d0/0x5d0 [ 55.121129] ? remove_wait_queue+0x1a6/0x360 [ 55.125522] ? add_wait_queue+0x2b0/0x2b0 [ 55.129656] ? __local_bh_enable_ip+0x160/0x260 [ 55.134309] tipc_send_group_bcast+0x50a/0xd90 [ 55.138876] ? tipc_sk_sock_err.isra.61+0x2f0/0x2f0 [ 55.143905] ? __init_waitqueue_head+0x150/0x150 [ 55.148651] ? refill_pi_state_cache.part.8+0x310/0x310 [ 55.154000] ? mark_held_locks+0x130/0x130 [ 55.158216] ? futex_wait_setup+0x266/0x3e0 [ 55.162520] ? futex_wake+0x760/0x760 [ 55.166316] ? print_usage_bug+0xc0/0xc0 [ 55.170359] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 55.175532] __tipc_sendmsg+0xeec/0x1d40 [ 55.179574] ? futex_wait+0x5ec/0xa50 [ 55.183366] ? tipc_sendmcast+0xf50/0xf50 [ 55.187495] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 55.192664] ? zap_class+0x640/0x640 [ 55.196360] ? print_usage_bug+0xc0/0xc0 [ 55.200402] ? find_held_lock+0x36/0x1c0 [ 55.204449] ? find_held_lock+0x36/0x1c0 [ 55.208497] ? mark_held_locks+0xc7/0x130 [ 55.212625] ? __local_bh_enable_ip+0x160/0x260 [ 55.217278] ? __local_bh_enable_ip+0x160/0x260 [ 55.221930] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 55.226503] ? trace_hardirqs_on+0xbd/0x310 [ 55.230805] ? lock_release+0xa00/0xa00 [ 55.234760] ? lock_sock_nested+0xe2/0x120 [ 55.238976] ? trace_hardirqs_off_caller+0x310/0x310 [ 55.244060] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.249845] ? check_preemption_disabled+0x48/0x280 [ 55.254848] ? lock_sock_nested+0x9a/0x120 [ 55.259060] ? lock_sock_nested+0x9a/0x120 [ 55.263275] ? __local_bh_enable_ip+0x160/0x260 [ 55.267927] tipc_sendmsg+0x50/0x70 [ 55.271531] ? __tipc_sendmsg+0x1d40/0x1d40 [ 55.275834] sock_sendmsg+0xd5/0x120 [ 55.279531] ___sys_sendmsg+0x7fd/0x930 [ 55.283489] ? find_held_lock+0x36/0x1c0 [ 55.287535] ? copy_msghdr_from_user+0x580/0x580 [ 55.292274] ? __fd_install+0x2b5/0x8f0 [ 55.296239] ? check_preemption_disabled+0x48/0x280 [ 55.301254] ? __fget_light+0x2e9/0x430 [ 55.305213] ? fget_raw+0x20/0x20 [ 55.308651] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.314167] ? __fd_install+0x2f9/0x8f0 [ 55.318120] ? get_unused_fd_flags+0x1a0/0x1a0 [ 55.322691] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.328212] ? sockfd_lookup_light+0xc5/0x160 [ 55.332687] __sys_sendmsg+0x11d/0x280 [ 55.336564] ? __ia32_sys_shutdown+0x80/0x80 [ 55.340954] ? __x64_sys_futex+0x47f/0x6a0 [ 55.345173] ? do_syscall_64+0x9a/0x820 [ 55.349130] ? do_syscall_64+0x9a/0x820 [ 55.353096] ? trace_hardirqs_off_caller+0x310/0x310 [ 55.358188] __x64_sys_sendmsg+0x78/0xb0 [ 55.362232] do_syscall_64+0x1b9/0x820 [ 55.366103] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 55.371448] ? syscall_return_slowpath+0x5e0/0x5e0 [ 55.376360] ? trace_hardirqs_on_caller+0x310/0x310 [ 55.381375] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 55.386379] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 55.393024] ? __switch_to_asm+0x40/0x70 [ 55.397068] ? __switch_to_asm+0x34/0x70 [ 55.401120] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.405945] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.411111] RIP: 0033:0x447009 [ 55.414288] Code: e8 ec be 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 55.433170] RSP: 002b:00007f498e006ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.440943] RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 0000000000447009 [ 55.448195] RDX: 0000000000000000 RSI: 00000000200006c0 RDI: 0000000000000005 [ 55.455454] RBP: 00000000006ddc50 R08: 0000000000000000 R09: 0000000000000000 [ 55.462703] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc5c [ 55.469954] R13: 00007ffc0149482f R14: 00007f498e0079c0 R15: 0000000000000005 [ 55.478392] Kernel Offset: disabled [ 55.482012] Rebooting in 86400 seconds..