[....] 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. [ 28.960499] kauditd_printk_skb: 7 callbacks suppressed [ 28.960510] audit: type=1800 audit(1544582148.221:29): pid=5868 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.993547] audit: type=1800 audit(1544582148.221:30): pid=5868 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.633716] sshd (6006) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.10.54' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 137.721236] ================================================================== [ 137.728891] BUG: KASAN: use-after-free in tipc_group_bc_cong+0x327/0x3f0 [ 137.735716] Read of size 2 at addr ffff8881c68ba174 by task syz-executor753/2505 [ 137.743224] [ 137.744837] CPU: 0 PID: 2505 Comm: syz-executor753 Not tainted 4.20.0-rc6+ #339 [ 137.752265] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 137.761600] Call Trace: [ 137.764173] dump_stack+0x244/0x39d [ 137.767790] ? dump_stack_print_info.cold.1+0x20/0x20 [ 137.772965] ? printk+0xa7/0xcf [ 137.776245] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 137.781202] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 137.786295] print_address_description.cold.7+0x9/0x1ff [ 137.791691] kasan_report.cold.8+0x242/0x309 [ 137.796120] ? tipc_group_bc_cong+0x327/0x3f0 [ 137.800609] __asan_report_load2_noabort+0x14/0x20 [ 137.805522] tipc_group_bc_cong+0x327/0x3f0 [ 137.809833] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 137.814924] ? tipc_group_cong+0x5d0/0x5d0 [ 137.819144] ? remove_wait_queue+0x1a6/0x360 [ 137.823540] ? add_wait_queue+0x2b0/0x2b0 [ 137.827674] ? __local_bh_enable_ip+0x160/0x260 [ 137.832333] tipc_send_group_bcast+0x50a/0xd90 [ 137.836927] ? tipc_sk_sock_err.isra.61+0x2f0/0x2f0 [ 137.841945] ? __init_waitqueue_head+0x150/0x150 [ 137.846685] ? refill_pi_state_cache.part.8+0x310/0x310 [ 137.852037] ? print_usage_bug+0xc0/0xc0 [ 137.856091] ? mark_held_locks+0x130/0x130 [ 137.860308] ? futex_wait_setup+0x266/0x3e0 [ 137.864620] ? futex_wake+0x760/0x760 [ 137.868407] ? __lock_acquire+0x62f/0x4c20 [ 137.872627] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 137.877805] __tipc_sendmsg+0xeec/0x1d40 [ 137.881851] ? futex_wait+0x5ec/0xa50 [ 137.885673] ? tipc_sendmcast+0xf50/0xf50 [ 137.889824] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 137.894999] ? zap_class+0x640/0x640 [ 137.898697] ? print_usage_bug+0xc0/0xc0 [ 137.902751] ? find_held_lock+0x36/0x1c0 [ 137.906796] ? mark_held_locks+0xc7/0x130 [ 137.910976] ? __local_bh_enable_ip+0x160/0x260 [ 137.915777] ? __local_bh_enable_ip+0x160/0x260 [ 137.920435] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 137.925004] ? trace_hardirqs_on+0xbd/0x310 [ 137.929310] ? lock_release+0xa00/0xa00 [ 137.933276] ? lock_sock_nested+0xe2/0x120 [ 137.937497] ? trace_hardirqs_off_caller+0x310/0x310 [ 137.942596] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 137.948143] ? check_preemption_disabled+0x48/0x280 [ 137.953157] ? lock_sock_nested+0x9a/0x120 [ 137.957376] ? lock_sock_nested+0x9a/0x120 [ 137.961597] ? __local_bh_enable_ip+0x160/0x260 [ 137.966251] tipc_sendmsg+0x50/0x70 [ 137.969861] ? __tipc_sendmsg+0x1d40/0x1d40 [ 137.974169] sock_sendmsg+0xd5/0x120 [ 137.977867] ___sys_sendmsg+0x7fd/0x930 [ 137.981828] ? __local_bh_enable_ip+0x160/0x260 [ 137.986484] ? copy_msghdr_from_user+0x580/0x580 [ 137.991226] ? _raw_spin_unlock_bh+0x30/0x40 [ 137.995634] ? trace_hardirqs_off_caller+0x310/0x310 [ 138.000723] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 138.006261] ? check_preemption_disabled+0x48/0x280 [ 138.011453] ? release_sock+0x1ec/0x2c0 [ 138.015415] ? __fget_light+0x2e9/0x430 [ 138.019374] ? fget_raw+0x20/0x20 [ 138.022810] ? release_sock+0x1ec/0x2c0 [ 138.026766] ? __release_sock+0x3a0/0x3a0 [ 138.030899] ? tipc_nametbl_build_group+0x273/0x360 [ 138.035902] ? tipc_setsockopt+0x726/0xd70 [ 138.040126] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 138.045656] ? sockfd_lookup_light+0xc5/0x160 [ 138.050140] __sys_sendmsg+0x11d/0x280 [ 138.054026] ? __ia32_sys_shutdown+0x80/0x80 [ 138.058447] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 138.063965] ? fput+0x130/0x1a0 [ 138.067232] ? __x64_sys_futex+0x47f/0x6a0 [ 138.071467] ? do_syscall_64+0x9a/0x820 [ 138.075443] ? do_syscall_64+0x9a/0x820 [ 138.079407] ? trace_hardirqs_off_caller+0x310/0x310 [ 138.084497] __x64_sys_sendmsg+0x78/0xb0 [ 138.088558] do_syscall_64+0x1b9/0x820 [ 138.092444] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 138.097796] ? syscall_return_slowpath+0x5e0/0x5e0 [ 138.102710] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 138.107540] ? trace_hardirqs_on_caller+0x310/0x310 [ 138.112547] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 138.117558] ? prepare_exit_to_usermode+0x291/0x3b0 [ 138.122584] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 138.127416] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 138.132595] RIP: 0033:0x446719 [ 138.135786] Code: e8 1c b4 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 138.154673] RSP: 002b:00007fae7c00ece8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 138.162365] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446719 [ 138.169636] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000006 [ 138.176890] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 138.184142] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 138.191395] R13: 00007ffde2c5b37f R14: 00007fae7c00f9c0 R15: 00000000006dbd2c [ 138.198657] [ 138.200293] Allocated by task 2505: [ 138.203906] save_stack+0x43/0xd0 [ 138.207346] kasan_kmalloc+0xc7/0xe0 [ 138.211040] kmem_cache_alloc_trace+0x152/0x750 [ 138.215696] tipc_group_create+0x152/0xa70 [ 138.219912] tipc_setsockopt+0x2d1/0xd70 [ 138.223954] __sys_setsockopt+0x1ba/0x3c0 [ 138.228087] __x64_sys_setsockopt+0xbe/0x150 [ 138.232482] do_syscall_64+0x1b9/0x820 [ 138.236351] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 138.241519] [ 138.243127] Freed by task 2506: [ 138.246389] save_stack+0x43/0xd0 [ 138.249825] __kasan_slab_free+0x102/0x150 [ 138.254061] kasan_slab_free+0xe/0x10 [ 138.257852] kfree+0xcf/0x230 [ 138.260943] tipc_group_delete+0x2e4/0x3f0 [ 138.265161] tipc_sk_leave+0x113/0x220 [ 138.269032] tipc_setsockopt+0x97d/0xd70 [ 138.273093] __sys_setsockopt+0x1ba/0x3c0 [ 138.277227] __x64_sys_setsockopt+0xbe/0x150 [ 138.281622] do_syscall_64+0x1b9/0x820 [ 138.285491] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 138.290659] [ 138.292272] The buggy address belongs to the object at ffff8881c68ba100 [ 138.292272] which belongs to the cache kmalloc-192 of size 192 [ 138.304913] The buggy address is located 116 bytes inside of [ 138.304913] 192-byte region [ffff8881c68ba100, ffff8881c68ba1c0) [ 138.316769] The buggy address belongs to the page: [ 138.321682] page:ffffea00071a2e80 count:1 mapcount:0 mapping:ffff8881da800040 index:0x0 [ 138.329808] flags: 0x2fffc0000000200(slab) [ 138.334028] raw: 02fffc0000000200 ffffea0007227f48 ffffea00071ed008 ffff8881da800040 [ 138.341892] raw: 0000000000000000 ffff8881c68ba000 0000000100000010 0000000000000000 [ 138.349768] page dumped because: kasan: bad access detected [ 138.355454] [ 138.357058] Memory state around the buggy address: [ 138.361967] ffff8881c68ba000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 138.369307] ffff8881c68ba080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 138.376651] >ffff8881c68ba100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 138.383991] ^ [ 138.390984] ffff8881c68ba180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 138.398379] ffff8881c68ba200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 138.405718] ================================================================== [ 138.413053] Disabling lock debugging due to kernel taint [ 138.419058] Kernel panic - not syncing: panic_on_warn set ... [ 138.424965] CPU: 0 PID: 2505 Comm: syz-executor753 Tainted: G B 4.20.0-rc6+ #339 [ 138.433799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 138.443133] Call Trace: [ 138.445717] dump_stack+0x244/0x39d [ 138.449336] ? dump_stack_print_info.cold.1+0x20/0x20 [ 138.454519] panic+0x2ad/0x55c [ 138.457699] ? add_taint.cold.5+0x16/0x16 [ 138.461835] ? preempt_schedule+0x4d/0x60 [ 138.465967] ? ___preempt_schedule+0x16/0x18 [ 138.470361] ? trace_hardirqs_on+0xb4/0x310 [ 138.474672] kasan_end_report+0x47/0x4f [ 138.478641] kasan_report.cold.8+0x76/0x309 [ 138.482955] ? tipc_group_bc_cong+0x327/0x3f0 [ 138.487446] __asan_report_load2_noabort+0x14/0x20 [ 138.492380] tipc_group_bc_cong+0x327/0x3f0 [ 138.496689] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 138.501779] ? tipc_group_cong+0x5d0/0x5d0 [ 138.506001] ? remove_wait_queue+0x1a6/0x360 [ 138.510413] ? add_wait_queue+0x2b0/0x2b0 [ 138.514547] ? __local_bh_enable_ip+0x160/0x260 [ 138.519235] tipc_send_group_bcast+0x50a/0xd90 [ 138.523838] ? tipc_sk_sock_err.isra.61+0x2f0/0x2f0 [ 138.528841] ? __init_waitqueue_head+0x150/0x150 [ 138.533615] ? refill_pi_state_cache.part.8+0x310/0x310 [ 138.538978] ? print_usage_bug+0xc0/0xc0 [ 138.543028] ? mark_held_locks+0x130/0x130 [ 138.547263] ? futex_wait_setup+0x266/0x3e0 [ 138.551582] ? futex_wake+0x760/0x760 [ 138.555366] ? __lock_acquire+0x62f/0x4c20 [ 138.559641] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 138.564835] __tipc_sendmsg+0xeec/0x1d40 [ 138.568883] ? futex_wait+0x5ec/0xa50 [ 138.572689] ? tipc_sendmcast+0xf50/0xf50 [ 138.576821] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 138.581997] ? zap_class+0x640/0x640 [ 138.585712] ? print_usage_bug+0xc0/0xc0 [ 138.589780] ? find_held_lock+0x36/0x1c0 [ 138.593829] ? mark_held_locks+0xc7/0x130 [ 138.597984] ? __local_bh_enable_ip+0x160/0x260 [ 138.602673] ? __local_bh_enable_ip+0x160/0x260 [ 138.607339] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 138.611915] ? trace_hardirqs_on+0xbd/0x310 [ 138.616223] ? lock_release+0xa00/0xa00 [ 138.620182] ? lock_sock_nested+0xe2/0x120 [ 138.624403] ? trace_hardirqs_off_caller+0x310/0x310 [ 138.629492] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 138.635013] ? check_preemption_disabled+0x48/0x280 [ 138.640015] ? lock_sock_nested+0x9a/0x120 [ 138.644232] ? lock_sock_nested+0x9a/0x120 [ 138.648454] ? __local_bh_enable_ip+0x160/0x260 [ 138.653112] tipc_sendmsg+0x50/0x70 [ 138.656731] ? __tipc_sendmsg+0x1d40/0x1d40 [ 138.661050] sock_sendmsg+0xd5/0x120 [ 138.664766] ___sys_sendmsg+0x7fd/0x930 [ 138.668726] ? __local_bh_enable_ip+0x160/0x260 [ 138.673383] ? copy_msghdr_from_user+0x580/0x580 [ 138.678125] ? _raw_spin_unlock_bh+0x30/0x40 [ 138.682520] ? trace_hardirqs_off_caller+0x310/0x310 [ 138.687612] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 138.693133] ? check_preemption_disabled+0x48/0x280 [ 138.698146] ? release_sock+0x1ec/0x2c0 [ 138.702121] ? __fget_light+0x2e9/0x430 [ 138.706084] ? fget_raw+0x20/0x20 [ 138.709522] ? release_sock+0x1ec/0x2c0 [ 138.713480] ? __release_sock+0x3a0/0x3a0 [ 138.717629] ? tipc_nametbl_build_group+0x273/0x360 [ 138.722644] ? tipc_setsockopt+0x726/0xd70 [ 138.726869] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 138.732389] ? sockfd_lookup_light+0xc5/0x160 [ 138.736880] __sys_sendmsg+0x11d/0x280 [ 138.740768] ? __ia32_sys_shutdown+0x80/0x80 [ 138.745179] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 138.750703] ? fput+0x130/0x1a0 [ 138.753971] ? __x64_sys_futex+0x47f/0x6a0 [ 138.758211] ? do_syscall_64+0x9a/0x820 [ 138.762174] ? do_syscall_64+0x9a/0x820 [ 138.766169] ? trace_hardirqs_off_caller+0x310/0x310 [ 138.771276] __x64_sys_sendmsg+0x78/0xb0 [ 138.775359] do_syscall_64+0x1b9/0x820 [ 138.779255] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 138.784604] ? syscall_return_slowpath+0x5e0/0x5e0 [ 138.789518] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 138.794364] ? trace_hardirqs_on_caller+0x310/0x310 [ 138.799365] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 138.804368] ? prepare_exit_to_usermode+0x291/0x3b0 [ 138.809372] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 138.814214] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 138.819404] RIP: 0033:0x446719 [ 138.822634] Code: e8 1c b4 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 138.841531] RSP: 002b:00007fae7c00ece8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 138.849220] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446719 [ 138.856503] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000006 [ 138.863756] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 138.871022] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 138.878274] R13: 00007ffde2c5b37f R14: 00007fae7c00f9c0 R15: 00000000006dbd2c [ 138.886479] Kernel Offset: disabled [ 138.890103] Rebooting in 86400 seconds..