[info] Using makefile-style concurrent boot in runlevel 2. [ 25.053500] audit: type=1800 audit(1544592753.871:21): pid=5836 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 25.073021] audit: type=1800 audit(1544592753.871:22): pid=5836 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 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 syzkaller login: [ 30.301561] sshd (5974) used greatest stack depth: 15440 bytes left Warning: Permanently added '10.128.0.152' (ECDSA) to the list of known hosts. executing program [ 37.042296] ================================================================== [ 37.049802] BUG: KASAN: use-after-free in tipc_group_bc_cong+0x327/0x3f0 [ 37.056624] Read of size 2 at addr ffff8881d9069d74 by task syz-executor912/5991 [ 37.064131] [ 37.065744] CPU: 1 PID: 5991 Comm: syz-executor912 Not tainted 4.20.0-rc6+ #274 [ 37.073172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.082502] Call Trace: [ 37.085079] dump_stack+0x244/0x39d [ 37.088693] ? dump_stack_print_info.cold.1+0x20/0x20 [ 37.093869] ? printk+0xa7/0xcf [ 37.097294] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 37.102126] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 37.107272] print_address_description.cold.7+0x9/0x1ff [ 37.112627] kasan_report.cold.8+0x242/0x309 [ 37.117024] ? tipc_group_bc_cong+0x327/0x3f0 [ 37.121507] __asan_report_load2_noabort+0x14/0x20 [ 37.126422] tipc_group_bc_cong+0x327/0x3f0 [ 37.131182] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 37.136269] ? tipc_group_cong+0x5d0/0x5d0 [ 37.140492] ? remove_wait_queue+0x1a6/0x360 [ 37.144893] ? add_wait_queue+0x2b0/0x2b0 [ 37.149030] ? __local_bh_enable_ip+0x160/0x260 [ 37.153699] tipc_send_group_bcast+0x50a/0xd90 [ 37.158277] ? tipc_sk_sock_err.isra.61+0x2f0/0x2f0 [ 37.163279] ? __init_waitqueue_head+0x150/0x150 [ 37.168029] ? mark_held_locks+0x130/0x130 [ 37.172259] ? futex_wake+0x760/0x760 [ 37.176048] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 37.181229] __tipc_sendmsg+0xeec/0x1d40 [ 37.185276] ? futex_wait+0x5ec/0xa50 [ 37.189189] ? tipc_sendmcast+0xf50/0xf50 [ 37.193332] ? zap_class+0x640/0x640 [ 37.197035] ? print_usage_bug+0xc0/0xc0 [ 37.201089] ? find_held_lock+0x36/0x1c0 [ 37.205139] ? mark_held_locks+0xc7/0x130 [ 37.209272] ? __local_bh_enable_ip+0x160/0x260 [ 37.213932] ? __local_bh_enable_ip+0x160/0x260 [ 37.218596] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 37.223165] ? trace_hardirqs_on+0xbd/0x310 [ 37.227474] ? lock_release+0xa00/0xa00 [ 37.231430] ? lock_sock_nested+0xe2/0x120 [ 37.235655] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.240765] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.246288] ? check_preemption_disabled+0x48/0x280 [ 37.251291] ? lock_sock_nested+0x9a/0x120 [ 37.255558] ? lock_sock_nested+0x9a/0x120 [ 37.259788] ? __local_bh_enable_ip+0x160/0x260 [ 37.264450] tipc_sendmsg+0x50/0x70 [ 37.268063] ? __tipc_sendmsg+0x1d40/0x1d40 [ 37.272382] sock_sendmsg+0xd5/0x120 [ 37.276085] ___sys_sendmsg+0x7fd/0x930 [ 37.280048] ? copy_msghdr_from_user+0x580/0x580 [ 37.284791] ? trace_hardirqs_on+0xbd/0x310 [ 37.289099] ? _raw_spin_unlock_bh+0x30/0x40 [ 37.293493] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.298602] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.304127] ? __fget_light+0x2e9/0x430 [ 37.308083] ? fget_raw+0x20/0x20 [ 37.311605] ? _raw_spin_unlock_bh+0x30/0x40 [ 37.315998] ? release_sock+0x1ec/0x2c0 [ 37.320014] ? __release_sock+0x3a0/0x3a0 [ 37.324163] ? __local_bh_enable_ip+0x160/0x260 [ 37.328830] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.334489] ? sockfd_lookup_light+0xc5/0x160 [ 37.338977] __sys_sendmsg+0x11d/0x280 [ 37.342850] ? __ia32_sys_shutdown+0x80/0x80 [ 37.347248] ? do_fast_syscall_32+0x150/0xfb2 [ 37.351778] ? do_fast_syscall_32+0x150/0xfb2 [ 37.356266] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.361353] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.366878] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 37.371619] do_fast_syscall_32+0x34d/0xfb2 [ 37.375927] ? do_int80_syscall_32+0x890/0x890 [ 37.380496] ? entry_SYSENTER_compat+0x68/0x7f [ 37.385244] ? trace_hardirqs_off_caller+0xbb/0x310 [ 37.390249] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.395081] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.399914] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.404913] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.409914] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.414917] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.419752] entry_SYSENTER_compat+0x70/0x7f [ 37.424190] RIP: 0023:0xf7feea29 [ 37.427552] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 37.446560] RSP: 002b:00000000f7fea1fc EFLAGS: 00000297 ORIG_RAX: 0000000000000172 [ 37.454249] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200001c0 [ 37.461501] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 37.468766] RBP: 00000000003d0f00 R08: 0000000000000000 R09: 0000000000000000 [ 37.476113] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 37.483368] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.490781] [ 37.492394] Allocated by task 5991: [ 37.496014] save_stack+0x43/0xd0 [ 37.499450] kasan_kmalloc+0xc7/0xe0 [ 37.503145] kmem_cache_alloc_trace+0x152/0x750 [ 37.507802] tipc_group_create+0x152/0xa70 [ 37.512019] tipc_setsockopt+0x2d1/0xd70 [ 37.516063] __compat_sys_setsockopt+0x329/0x860 [ 37.520799] __ia32_compat_sys_setsockopt+0xbd/0x150 [ 37.525895] do_fast_syscall_32+0x34d/0xfb2 [ 37.530219] entry_SYSENTER_compat+0x70/0x7f [ 37.534646] [ 37.536264] Freed by task 5992: [ 37.539532] save_stack+0x43/0xd0 [ 37.542970] __kasan_slab_free+0x102/0x150 [ 37.547232] kasan_slab_free+0xe/0x10 [ 37.551028] kfree+0xcf/0x230 [ 37.554125] tipc_group_delete+0x2e4/0x3f0 [ 37.558338] tipc_sk_leave+0x113/0x220 [ 37.562205] tipc_setsockopt+0x97d/0xd70 [ 37.566252] __compat_sys_setsockopt+0x329/0x860 [ 37.570993] __ia32_compat_sys_setsockopt+0xbd/0x150 [ 37.576144] do_fast_syscall_32+0x34d/0xfb2 [ 37.580457] entry_SYSENTER_compat+0x70/0x7f [ 37.584851] [ 37.586471] The buggy address belongs to the object at ffff8881d9069d00 [ 37.586471] which belongs to the cache kmalloc-192 of size 192 [ 37.599114] The buggy address is located 116 bytes inside of [ 37.599114] 192-byte region [ffff8881d9069d00, ffff8881d9069dc0) [ 37.610973] The buggy address belongs to the page: [ 37.615894] page:ffffea0007641a40 count:1 mapcount:0 mapping:ffff8881da800040 index:0x0 [ 37.624089] flags: 0x2fffc0000000200(slab) [ 37.628340] raw: 02fffc0000000200 ffffea000717b048 ffffea0007615e08 ffff8881da800040 [ 37.636222] raw: 0000000000000000 ffff8881d9069000 0000000100000010 0000000000000000 [ 37.644090] page dumped because: kasan: bad access detected [ 37.649787] [ 37.651474] Memory state around the buggy address: [ 37.656395] ffff8881d9069c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.663741] ffff8881d9069c80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.671088] >ffff8881d9069d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.678431] ^ [ 37.685442] ffff8881d9069d80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.692806] ffff8881d9069e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.700185] ================================================================== [ 37.707531] Disabling lock debugging due to kernel taint [ 37.713934] Kernel panic - not syncing: panic_on_warn set ... [ 37.719844] CPU: 0 PID: 5991 Comm: syz-executor912 Tainted: G B 4.20.0-rc6+ #274 [ 37.728665] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.737998] Call Trace: [ 37.740574] dump_stack+0x244/0x39d [ 37.744186] ? dump_stack_print_info.cold.1+0x20/0x20 [ 37.749422] panic+0x2ad/0x55c [ 37.752617] ? add_taint.cold.5+0x16/0x16 [ 37.756762] ? preempt_schedule+0x4d/0x60 [ 37.760905] ? ___preempt_schedule+0x16/0x18 [ 37.765301] ? trace_hardirqs_on+0xb4/0x310 [ 37.769610] kasan_end_report+0x47/0x4f [ 37.773566] kasan_report.cold.8+0x76/0x309 [ 37.777876] ? tipc_group_bc_cong+0x327/0x3f0 [ 37.782352] __asan_report_load2_noabort+0x14/0x20 [ 37.787344] tipc_group_bc_cong+0x327/0x3f0 [ 37.791659] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 37.796756] ? tipc_group_cong+0x5d0/0x5d0 [ 37.800984] ? remove_wait_queue+0x1a6/0x360 [ 37.805378] ? add_wait_queue+0x2b0/0x2b0 [ 37.809507] ? __local_bh_enable_ip+0x160/0x260 [ 37.814161] tipc_send_group_bcast+0x50a/0xd90 [ 37.818782] ? tipc_sk_sock_err.isra.61+0x2f0/0x2f0 [ 37.823796] ? __init_waitqueue_head+0x150/0x150 [ 37.828547] ? mark_held_locks+0x130/0x130 [ 37.832768] ? futex_wake+0x760/0x760 [ 37.836605] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 37.841785] __tipc_sendmsg+0xeec/0x1d40 [ 37.845892] ? futex_wait+0x5ec/0xa50 [ 37.849694] ? tipc_sendmcast+0xf50/0xf50 [ 37.853828] ? zap_class+0x640/0x640 [ 37.857525] ? print_usage_bug+0xc0/0xc0 [ 37.861574] ? find_held_lock+0x36/0x1c0 [ 37.865619] ? mark_held_locks+0xc7/0x130 [ 37.869759] ? __local_bh_enable_ip+0x160/0x260 [ 37.874423] ? __local_bh_enable_ip+0x160/0x260 [ 37.879082] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 37.883651] ? trace_hardirqs_on+0xbd/0x310 [ 37.888032] ? lock_release+0xa00/0xa00 [ 37.892010] ? lock_sock_nested+0xe2/0x120 [ 37.896240] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.901340] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.906969] ? check_preemption_disabled+0x48/0x280 [ 37.911969] ? lock_sock_nested+0x9a/0x120 [ 37.916187] ? lock_sock_nested+0x9a/0x120 [ 37.920407] ? __local_bh_enable_ip+0x160/0x260 [ 37.925065] tipc_sendmsg+0x50/0x70 [ 37.928681] ? __tipc_sendmsg+0x1d40/0x1d40 [ 37.932989] sock_sendmsg+0xd5/0x120 [ 37.936692] ___sys_sendmsg+0x7fd/0x930 [ 37.940653] ? copy_msghdr_from_user+0x580/0x580 [ 37.945396] ? trace_hardirqs_on+0xbd/0x310 [ 37.949705] ? _raw_spin_unlock_bh+0x30/0x40 [ 37.954096] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.959240] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.964778] ? __fget_light+0x2e9/0x430 [ 37.968749] ? fget_raw+0x20/0x20 [ 37.972190] ? _raw_spin_unlock_bh+0x30/0x40 [ 37.976601] ? release_sock+0x1ec/0x2c0 [ 37.980559] ? __release_sock+0x3a0/0x3a0 [ 37.984698] ? __local_bh_enable_ip+0x160/0x260 [ 37.989527] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.995047] ? sockfd_lookup_light+0xc5/0x160 [ 37.999527] __sys_sendmsg+0x11d/0x280 [ 38.003525] ? __ia32_sys_shutdown+0x80/0x80 [ 38.007920] ? do_fast_syscall_32+0x150/0xfb2 [ 38.012400] ? do_fast_syscall_32+0x150/0xfb2 [ 38.016882] ? trace_hardirqs_off_caller+0x310/0x310 [ 38.021973] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.027497] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 38.032246] do_fast_syscall_32+0x34d/0xfb2 [ 38.036551] ? do_int80_syscall_32+0x890/0x890 [ 38.041266] ? entry_SYSENTER_compat+0x68/0x7f [ 38.045839] ? trace_hardirqs_off_caller+0xbb/0x310 [ 38.050838] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.055676] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.060501] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.065500] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.070504] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.075503] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.080507] entry_SYSENTER_compat+0x70/0x7f [ 38.084902] RIP: 0023:0xf7feea29 [ 38.088260] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 38.107326] RSP: 002b:00000000f7fea1fc EFLAGS: 00000297 ORIG_RAX: 0000000000000172 [ 38.115122] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200001c0 [ 38.122383] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 38.129634] RBP: 00000000003d0f00 R08: 0000000000000000 R09: 0000000000000000 [ 38.137060] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 38.144516] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 38.152885] Kernel Offset: disabled [ 38.156504] Rebooting in 86400 seconds..