audit: type=1800 audit(1551833192.651:30): pid=7421 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7574 Comm: syz-executor806 Not tainted 5.0.0+ #109 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 net/sctp/stream_sched_rr.c:141 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 RSP: 0018:ffff88809316f040 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86799d9f RDX: 0000000000000006 RSI: ffffffff8681941e RDI: 0000000000000030 RBP: ffff88809316f058 R08: ffff888092b9c3c0 R09: 0000000000000002 R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff888087178760 R13: ffff888087178040 R14: dffffc0000000000 R15: ffff88809316f198 FS: 000000000201d880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 000000009540d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sctp_outq_dequeue_data net/sctp/outqueue.c:90 [inline] sctp_outq_flush_data net/sctp/outqueue.c:1079 [inline] sctp_outq_flush+0xba2/0x2790 net/sctp/outqueue.c:1205 sctp_outq_uncork+0x6c/0x80 net/sctp/outqueue.c:772 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1820 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline] sctp_do_sm+0x513/0x5390 net/sctp/sm_sideeffect.c:1191 sctp_assoc_bh_rcv+0x343/0x660 net/sctp/associola.c:1074 sctp_inq_push+0x1ea/0x290 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x189/0xbc0 net/sctp/input.c:354 sk_backlog_rcv include/net/sock.h:937 [inline] __release_sock+0x12e/0x3a0 net/core/sock.c:2413 release_sock+0x59/0x1c0 net/core/sock.c:2929 sctp_wait_for_connect+0x316/0x540 net/sctp/socket.c:8999 sctp_sendmsg_to_asoc+0x13e2/0x17d0 net/sctp/socket.c:1968 sctp_sendmsg+0x10a9/0x17e0 net/sctp/socket.c:2114 inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:632 ___sys_sendmsg+0x806/0x930 net/socket.c:2137 __sys_sendmsg+0x105/0x1d0 net/socket.c:2175 __do_sys_sendmsg net/socket.c:2184 [inline] __se_sys_sendmsg net/socket.c:2182 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2182 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440159 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 RSP: 002b:00007fff6dc42478 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 RDX: 0000000000000000 RSI: 000000002001afc8 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000002 R09: 00000000004002c8 R10: 0000000000000008 R11: 0000000000000246 R12: 00000000004019e0 R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 2adc24ab18025436 ]--- RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 net/sctp/stream_sched_rr.c:141 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 RSP: 0018:ffff88809316f040 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86799d9f RDX: 0000000000000006 RSI: ffffffff8681941e RDI: 0000000000000030 RBP: ffff88809316f058 R08: ffff888092b9c3c0 R09: 0000000000000002 R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff888087178760 R13: ffff888087178040 R14: dffffc0000000000 R15: ffff88809316f198 FS: 000000000201d880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 000000009540d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400