[ 42.268343] audit: type=1800 audit(1551833282.684:32): pid=7862 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?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: [ 47.912484] kauditd_printk_skb: 2 callbacks suppressed [ 47.912499] audit: type=1400 audit(1551833288.424:35): avc: denied { map } for pid=8035 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.155' (ECDSA) to the list of known hosts. executing program [ 54.421759] audit: type=1400 audit(1551833294.934:36): avc: denied { map } for pid=8047 comm="syz-executor778" path="/root/syz-executor778173561" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 54.427296] kasan: CONFIG_KASAN_INLINE enabled [ 54.452798] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 54.460566] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 54.466785] CPU: 1 PID: 8047 Comm: syz-executor778 Not tainted 5.0.0+ #7 [ 54.473598] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.482945] RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 [ 54.488200] 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 [ 54.507099] RSP: 0018:ffff88809eacf040 EFLAGS: 00010206 [ 54.512449] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8679cd9f [ 54.519698] RDX: 0000000000000006 RSI: ffffffff8681c41e RDI: 0000000000000030 [ 54.526946] RBP: ffff88809eacf058 R08: ffff8880a12bc300 R09: 0000000000000002 [ 54.534193] R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff88807cae6ca0 [ 54.541441] R13: ffff88807cae6580 R14: dffffc0000000000 R15: ffff88809eacf198 [ 54.548695] FS: 0000000001865880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 54.556912] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.562774] CR2: 000055af2d491150 CR3: 000000008dd7b000 CR4: 00000000001406e0 [ 54.570024] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.577274] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.584521] Call Trace: [ 54.587095] sctp_outq_flush+0xba2/0x2790 [ 54.591231] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 54.596659] ? sctp_chunkify+0x4b/0x290 [ 54.600624] ? __sctp_outq_teardown+0xc60/0xc60 [ 54.605276] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 54.610794] ? sctp_outq_tail+0x681/0x930 [ 54.614921] sctp_outq_uncork+0x6c/0x80 [ 54.618878] sctp_do_sm+0x513/0x5390 [ 54.622567] ? __lock_acquire+0x53b/0x4700 [ 54.626798] ? __sys_sendmsg+0x105/0x1d0 [ 54.630847] ? sctp_do_8_2_transport_strike.isra.0+0x940/0x940 [ 54.636800] ? mark_held_locks+0x100/0x100 [ 54.641018] ? sctp_assoc_bh_rcv+0x2fc/0x660 [ 54.645406] ? find_held_lock+0x35/0x130 [ 54.649451] ? sctp_assoc_bh_rcv+0x2fc/0x660 [ 54.653851] ? kvm_clock_read+0x18/0x30 [ 54.657810] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 54.662813] ? ktime_get+0x208/0x300 [ 54.666516] sctp_assoc_bh_rcv+0x343/0x660 [ 54.670733] sctp_inq_push+0x1ea/0x290 [ 54.674600] sctp_backlog_rcv+0x189/0xbc0 [ 54.678734] ? __local_bh_enable_ip+0x15a/0x270 [ 54.683382] ? sctp_hash_obj+0x5e0/0x5e0 [ 54.687511] ? __release_sock+0xca/0x3a0 [ 54.691554] ? __local_bh_enable_ip+0x15a/0x270 [ 54.696203] __release_sock+0x12e/0x3a0 [ 54.700160] release_sock+0x59/0x1c0 [ 54.703853] sctp_wait_for_connect+0x316/0x540 [ 54.708414] ? sctp_get_port+0x180/0x180 [ 54.712454] ? finish_wait+0x260/0x260 [ 54.716337] ? sctp_datamsg_put+0x36/0x4d0 [ 54.720553] ? sctp_primitive_SEND+0xa0/0xd0 [ 54.724942] sctp_sendmsg_to_asoc+0x13e2/0x17d0 [ 54.729593] ? sctp_clear_owner_w+0x120/0x120 [ 54.734067] ? sctp_autobind+0x1f0/0x1f0 [ 54.738110] ? lock_downgrade+0x810/0x810 [ 54.742242] ? kasan_check_read+0x11/0x20 [ 54.746374] sctp_sendmsg+0x10a9/0x17e0 [ 54.750345] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.755864] ? sctp_id2assoc+0x2c0/0x2c0 [ 54.759910] ? selinux_secmark_relabel_packet+0xe0/0xe0 [ 54.765255] ? _copy_from_user+0xdd/0x150 [ 54.769402] inet_sendmsg+0x147/0x5d0 [ 54.773183] ? ipip_gro_receive+0x100/0x100 [ 54.777484] sock_sendmsg+0xdd/0x130 [ 54.781175] ___sys_sendmsg+0x806/0x930 [ 54.785133] ? copy_msghdr_from_user+0x430/0x430 [ 54.789870] ? _raw_spin_unlock_bh+0x31/0x40 [ 54.794258] ? release_sock+0x158/0x1c0 [ 54.798215] ? sctp_setsockopt+0x165/0x68a0 [ 54.802516] ? sctp_setsockopt_paddr_thresholds+0x540/0x540 [ 54.808209] ? sock_has_perm+0x209/0x2a0 [ 54.812255] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.817773] ? __fget_light+0x1a9/0x230 [ 54.821727] ? __fdget+0x1b/0x20 [ 54.825073] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.830616] __sys_sendmsg+0x105/0x1d0 [ 54.834485] ? __ia32_sys_shutdown+0x80/0x80 [ 54.838877] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 54.843617] ? do_syscall_64+0x26/0x610 [ 54.847574] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.852917] ? do_syscall_64+0x26/0x610 [ 54.856878] __x64_sys_sendmsg+0x78/0xb0 [ 54.860922] do_syscall_64+0x103/0x610 [ 54.864790] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.869957] RIP: 0033:0x440159 [ 54.873129] 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 [ 54.892097] RSP: 002b:00007fff8801fd38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 54.899788] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 [ 54.907035] RDX: 0000000000000000 RSI: 000000002001afc8 RDI: 0000000000000003 [ 54.914299] RBP: 00000000006ca018 R08: 0000000000000002 R09: 00000000004002c8 [ 54.921546] R10: 0000000000000008 R11: 0000000000000246 R12: 00000000004019e0 [ 54.928796] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 54.936060] Modules linked in: [ 54.939719] ---[ end trace 7cc5803525726c53 ]--- [ 54.944485] RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 [ 54.949905] 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 [ 54.968855] RSP: 0018:ffff88809eacf040 EFLAGS: 00010206 [ 54.974218] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8679cd9f [ 54.981510] RDX: 0000000000000006 RSI: ffffffff8681c41e RDI: 0000000000000030 [ 54.988794] RBP: ffff88809eacf058 R08: ffff8880a12bc300 R09: 0000000000000002 [ 54.996073] R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff88807cae6ca0 [ 55.003340] R13: ffff88807cae6580 R14: dffffc0000000000 R15: ffff88809eacf198 [ 55.010651] FS: 0000000001865880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 55.018891] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.024753] CR2: 000055af2d491150 CR3: 000000008dd7b000 CR4: 00000000001406e0 [ 55.032040] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.039348] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.046662] Kernel panic - not syncing: Fatal exception [ 55.052714] Kernel Offset: disabled [ 55.056333] Rebooting in 86400 seconds..