[ 34.556698] audit: type=1800 audit(1551831913.942:28): pid=7478 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.190213] audit: type=1800 audit(1551831914.582:29): pid=7478 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 [ 35.222569] audit: type=1800 audit(1551831914.582:30): pid=7478 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.88' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.449447] kasan: CONFIG_KASAN_INLINE enabled [ 47.454312] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.461793] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.468035] CPU: 0 PID: 7652 Comm: syz-executor043 Not tainted 5.0.0+ #97 [ 47.475030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.484385] RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 [ 47.489647] Code: ea 03 80 3c 02 00 0f 85 a2 00 00 00 48 8b 5b 08 e8 52 22 ee fa 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 53 4c 8b 6b 30 4c 89 e7 49 83 ed 18 4c 89 ee e8 b4 [ 47.508675] RSP: 0018:ffff8880a906f040 EFLAGS: 00010206 [ 47.514022] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86799d9f [ 47.521277] RDX: 0000000000000006 RSI: ffffffff8681941e RDI: 0000000000000030 [ 47.528532] RBP: ffff8880a906f058 R08: ffff8880969e4580 R09: 0000000000000002 [ 47.535786] R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff888092aceda0 [ 47.543050] R13: ffff888092ace680 R14: dffffc0000000000 R15: ffff8880a906f198 [ 47.550312] FS: 0000000000bef880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 47.558522] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.564385] CR2: 0000000020000080 CR3: 0000000093217000 CR4: 00000000001406f0 [ 47.571635] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.578882] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.586422] Call Trace: [ 47.589101] sctp_outq_flush+0xba2/0x2790 [ 47.593433] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 47.598873] ? sctp_chunkify+0x4b/0x290 [ 47.602825] ? __sctp_outq_teardown+0xc60/0xc60 [ 47.607472] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 47.612988] ? sctp_outq_tail+0x681/0x930 [ 47.617187] sctp_outq_uncork+0x6c/0x80 [ 47.621151] sctp_do_sm+0x513/0x5390 [ 47.624988] ? __lock_acquire+0x53b/0x4700 [ 47.629208] ? __sys_sendmsg+0x105/0x1d0 [ 47.633376] ? sctp_do_8_2_transport_strike.isra.0+0x940/0x940 [ 47.639337] ? mark_held_locks+0x100/0x100 [ 47.643681] ? sctp_assoc_bh_rcv+0x2fc/0x660 [ 47.648071] ? find_held_lock+0x35/0x130 [ 47.652114] ? sctp_assoc_bh_rcv+0x2fc/0x660 [ 47.656506] ? kvm_clock_read+0x18/0x30 [ 47.660478] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 47.665477] ? ktime_get+0x208/0x300 [ 47.669249] sctp_assoc_bh_rcv+0x343/0x660 [ 47.673473] sctp_inq_push+0x1ea/0x290 [ 47.677566] sctp_backlog_rcv+0x189/0xbc0 [ 47.681809] ? __local_bh_enable_ip+0x15a/0x270 [ 47.686477] ? sctp_hash_obj+0x5e0/0x5e0 [ 47.690657] ? __release_sock+0xca/0x3a0 [ 47.694699] ? __local_bh_enable_ip+0x15a/0x270 [ 47.699365] __release_sock+0x12e/0x3a0 [ 47.703319] release_sock+0x59/0x1c0 [ 47.707018] sctp_wait_for_connect+0x316/0x540 [ 47.711586] ? sctp_get_port+0x180/0x180 [ 47.715626] ? finish_wait+0x260/0x260 [ 47.719491] ? sctp_datamsg_put+0x36/0x4d0 [ 47.723720] ? sctp_primitive_SEND+0xa0/0xd0 [ 47.728111] sctp_sendmsg_to_asoc+0x13e2/0x17d0 [ 47.732759] ? sctp_clear_owner_w+0x120/0x120 [ 47.737231] ? sctp_autobind+0x1f0/0x1f0 [ 47.741272] ? lock_downgrade+0x810/0x810 [ 47.745402] ? kasan_check_read+0x11/0x20 [ 47.749532] sctp_sendmsg+0x10a9/0x17e0 [ 47.753486] ? sctp_id2assoc+0x2c0/0x2c0 [ 47.757522] ? __might_sleep+0x95/0x190 [ 47.761475] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 47.766394] ? aa_sk_perm+0x1c6/0x7c0 [ 47.770174] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 47.774999] inet_sendmsg+0x147/0x5d0 [ 47.778782] ? ipip_gro_receive+0x100/0x100 [ 47.783100] sock_sendmsg+0xdd/0x130 [ 47.786793] ___sys_sendmsg+0x806/0x930 [ 47.790746] ? copy_msghdr_from_user+0x430/0x430 [ 47.795481] ? _raw_spin_unlock_bh+0x31/0x40 [ 47.799884] ? release_sock+0x158/0x1c0 [ 47.803833] ? sctp_setsockopt+0x165/0x68a0 [ 47.808268] ? sctp_setsockopt_paddr_thresholds+0x540/0x540 [ 47.813969] ? lockdep_hardirqs_on+0x415/0x5d0 [ 47.818536] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 47.823475] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.829009] ? __fget_light+0x1a9/0x230 [ 47.832967] ? __fdget+0x1b/0x20 [ 47.836320] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.841855] __sys_sendmsg+0x105/0x1d0 [ 47.845721] ? __ia32_sys_shutdown+0x80/0x80 [ 47.850128] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.854922] ? do_syscall_64+0x26/0x610 [ 47.858885] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.864243] ? do_syscall_64+0x26/0x610 [ 47.868200] __x64_sys_sendmsg+0x78/0xb0 [ 47.872239] do_syscall_64+0x103/0x610 [ 47.876119] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.881290] RIP: 0033:0x440159 [ 47.884464] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 47.903367] RSP: 002b:00007ffc5251deb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 47.911056] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 [ 47.918305] RDX: 0000000000000000 RSI: 000000002001afc8 RDI: 0000000000000003 [ 47.925556] RBP: 00000000006ca018 R08: 0000000000000002 R09: 00000000004002c8 [ 47.932805] R10: 0000000000000008 R11: 0000000000000246 R12: 00000000004019e0 [ 47.940052] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 47.947300] Modules linked in: [ 47.950814] ---[ end trace c50a3df51a7ea2f6 ]--- [ 47.955600] RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 [ 47.961055] Code: ea 03 80 3c 02 00 0f 85 a2 00 00 00 48 8b 5b 08 e8 52 22 ee fa 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 53 4c 8b 6b 30 4c 89 e7 49 83 ed 18 4c 89 ee e8 b4 [ 47.980043] RSP: 0018:ffff8880a906f040 EFLAGS: 00010206 [ 47.985409] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86799d9f [ 47.992693] RDX: 0000000000000006 RSI: ffffffff8681941e RDI: 0000000000000030 [ 48.000013] RBP: ffff8880a906f058 R08: ffff8880969e4580 R09: 0000000000000002 [ 48.007278] R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff888092aceda0 [ 48.014566] R13: ffff888092ace680 R14: dffffc0000000000 R15: ffff8880a906f198 [ 48.021870] FS: 0000000000bef880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 48.030125] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.036000] CR2: 0000000020000080 CR3: 0000000093217000 CR4: 00000000001406f0 [ 48.043330] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.050621] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.058084] Kernel panic - not syncing: Fatal exception [ 48.064122] Kernel Offset: disabled [ 48.067739] Rebooting in 86400 seconds..