[ 36.187464] audit: type=1800 audit(1551833211.463:27): pid=7516 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 36.207847] audit: type=1800 audit(1551833211.463:28): pid=7516 uid=0 auid=4294967295 ses=4294967295 subj=_ 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. [ 37.103485] audit: type=1800 audit(1551833212.433:29): pid=7516 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 37.128664] audit: type=1800 audit(1551833212.433:30): pid=7516 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.127' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.282826] kasan: CONFIG_KASAN_INLINE enabled [ 48.287521] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.294939] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.301174] CPU: 1 PID: 7669 Comm: syz-executor236 Not tainted 5.0.0+ #7 [ 48.307993] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.317373] RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 [ 48.322644] Code: ea 03 80 3c 02 00 0f 85 a2 00 00 00 48 8b 5b 08 e8 62 20 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 [ 48.341522] RSP: 0018:ffff88809e5f7040 EFLAGS: 00010206 [ 48.346861] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8679cd9f [ 48.354112] RDX: 0000000000000006 RSI: ffffffff8681c41e RDI: 0000000000000030 [ 48.361362] RBP: ffff88809e5f7058 R08: ffff8880908e8100 R09: 0000000000000002 [ 48.368609] R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff88809516ab20 [ 48.375858] R13: ffff88809516a400 R14: dffffc0000000000 R15: ffff88809e5f7198 [ 48.383125] FS: 0000000000799880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 48.391328] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.397187] CR2: 0000000020000080 CR3: 00000000904e0000 CR4: 00000000001406e0 [ 48.404438] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.411686] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.418930] Call Trace: [ 48.421514] sctp_outq_flush+0xba2/0x2790 [ 48.425644] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 48.431076] ? sctp_chunkify+0x4b/0x290 [ 48.435034] ? __sctp_outq_teardown+0xc60/0xc60 [ 48.439714] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 48.445249] ? sctp_outq_tail+0x681/0x930 [ 48.449405] sctp_outq_uncork+0x6c/0x80 [ 48.453362] sctp_do_sm+0x513/0x5390 [ 48.457058] ? __lock_acquire+0x53b/0x4700 [ 48.461274] ? __sys_sendmsg+0x105/0x1d0 [ 48.465318] ? sctp_do_8_2_transport_strike.isra.0+0x940/0x940 [ 48.471282] ? mark_held_locks+0x100/0x100 [ 48.475496] ? sctp_assoc_bh_rcv+0x2fc/0x660 [ 48.479881] ? find_held_lock+0x35/0x130 [ 48.483927] ? sctp_assoc_bh_rcv+0x2fc/0x660 [ 48.488364] ? kvm_clock_read+0x18/0x30 [ 48.492407] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 48.497404] ? ktime_get+0x208/0x300 [ 48.501111] sctp_assoc_bh_rcv+0x343/0x660 [ 48.505343] sctp_inq_push+0x1ea/0x290 [ 48.509211] sctp_backlog_rcv+0x189/0xbc0 [ 48.513357] ? __local_bh_enable_ip+0x15a/0x270 [ 48.518008] ? sctp_hash_obj+0x5e0/0x5e0 [ 48.522049] ? __release_sock+0xca/0x3a0 [ 48.526089] ? __local_bh_enable_ip+0x15a/0x270 [ 48.530748] __release_sock+0x12e/0x3a0 [ 48.534719] release_sock+0x59/0x1c0 [ 48.538416] sctp_wait_for_connect+0x316/0x540 [ 48.542989] ? sctp_get_port+0x180/0x180 [ 48.547040] ? finish_wait+0x260/0x260 [ 48.550917] ? sctp_datamsg_put+0x36/0x4d0 [ 48.555128] ? sctp_primitive_SEND+0xa0/0xd0 [ 48.559531] sctp_sendmsg_to_asoc+0x13e2/0x17d0 [ 48.564185] ? sctp_clear_owner_w+0x120/0x120 [ 48.568679] ? sctp_autobind+0x1f0/0x1f0 [ 48.572721] ? lock_downgrade+0x810/0x810 [ 48.576878] ? kasan_check_read+0x11/0x20 [ 48.581008] sctp_sendmsg+0x10a9/0x17e0 [ 48.584959] ? sctp_id2assoc+0x2c0/0x2c0 [ 48.588998] ? _copy_from_user+0xdd/0x150 [ 48.593128] inet_sendmsg+0x147/0x5d0 [ 48.596906] ? ipip_gro_receive+0x100/0x100 [ 48.601207] sock_sendmsg+0xdd/0x130 [ 48.604897] ___sys_sendmsg+0x806/0x930 [ 48.608851] ? copy_msghdr_from_user+0x430/0x430 [ 48.613586] ? _raw_spin_unlock_bh+0x31/0x40 [ 48.617989] ? release_sock+0x158/0x1c0 [ 48.621945] ? sctp_setsockopt+0x165/0x68a0 [ 48.626249] ? sctp_setsockopt_paddr_thresholds+0x540/0x540 [ 48.631938] ? __local_bh_enable_ip+0x15a/0x270 [ 48.636585] ? _raw_spin_unlock_bh+0x31/0x40 [ 48.640971] ? __local_bh_enable_ip+0x15a/0x270 [ 48.645633] ? lockdep_hardirqs_on+0x415/0x5d0 [ 48.650211] ? _raw_spin_unlock_bh+0x31/0x40 [ 48.654604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.660120] ? __fget_light+0x1a9/0x230 [ 48.664079] ? __fdget+0x1b/0x20 [ 48.667423] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.672944] __sys_sendmsg+0x105/0x1d0 [ 48.676810] ? __ia32_sys_shutdown+0x80/0x80 [ 48.681217] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 48.685949] ? do_syscall_64+0x26/0x610 [ 48.689904] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.695248] ? do_syscall_64+0x26/0x610 [ 48.699205] __x64_sys_sendmsg+0x78/0xb0 [ 48.703278] do_syscall_64+0x103/0x610 [ 48.707147] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.712329] RIP: 0033:0x440159 [ 48.715504] 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 [ 48.734398] RSP: 002b:00007ffc4be52b58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 48.742084] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 [ 48.749332] RDX: 0000000000000000 RSI: 000000002001afc8 RDI: 0000000000000003 [ 48.756582] RBP: 00000000006ca018 R08: 0000000000000002 R09: 00000000004002c8 [ 48.763831] R10: 0000000000000008 R11: 0000000000000246 R12: 00000000004019e0 [ 48.771081] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 48.778328] Modules linked in: [ 48.782333] ---[ end trace 9ceb54d76f76b284 ]--- [ 48.787116] RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 [ 48.792447] Code: ea 03 80 3c 02 00 0f 85 a2 00 00 00 48 8b 5b 08 e8 62 20 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 [ 48.811400] RSP: 0018:ffff88809e5f7040 EFLAGS: 00010206 [ 48.816756] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8679cd9f [ 48.824031] RDX: 0000000000000006 RSI: ffffffff8681c41e RDI: 0000000000000030 [ 48.831312] RBP: ffff88809e5f7058 R08: ffff8880908e8100 R09: 0000000000000002 [ 48.838576] R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff88809516ab20 [ 48.845854] R13: ffff88809516a400 R14: dffffc0000000000 R15: ffff88809e5f7198 [ 48.853153] FS: 0000000000799880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 48.861408] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.867284] CR2: 0000000020000080 CR3: 00000000904e0000 CR4: 00000000001406e0 [ 48.874569] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.881864] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.889134] Kernel panic - not syncing: Fatal exception [ 48.895163] Kernel Offset: disabled [ 48.898781] Rebooting in 86400 seconds..