[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 70.689415][ T27] audit: type=1800 audit(1584577920.843:25): pid=9201 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 70.709762][ T27] audit: type=1800 audit(1584577920.853:26): pid=9201 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 70.759980][ T27] audit: type=1800 audit(1584577920.853:27): pid=9201 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.137' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 98.495667][ T9355] general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN [ 98.507917][ T9355] KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] [ 98.516333][ T9355] CPU: 1 PID: 9355 Comm: syz-executor289 Not tainted 5.6.0-rc5-syzkaller #0 [ 98.524981][ T9355] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.535125][ T9355] RIP: 0010:do_tcp_getsockopt.isra.0+0x2457/0x3480 [ 98.541608][ T9355] Code: fd ff ff 45 2b 6c 24 28 44 89 ad b0 fd ff ff e8 7f a1 ec fa 49 8d 7c 24 70 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <0f> b6 04 08 84 c0 74 08 3c 03 0f 8e a5 0f 00 00 45 8b 74 24 70 49 [ 98.561198][ T9355] RSP: 0018:ffffc90001fa7b10 EFLAGS: 00010202 [ 98.567290][ T9355] RAX: 000000000000000e RBX: 0000000000000000 RCX: dffffc0000000000 [ 98.575372][ T9355] RDX: 0000000000000000 RSI: ffffffff86857d91 RDI: 0000000000000070 [ 98.583332][ T9355] RBP: ffffc90001fa7de0 R08: ffff88809428a100 R09: ffffed10120479d8 [ 98.591296][ T9355] R10: ffffed10120479d7 R11: ffff88809023cebf R12: 0000000000000000 [ 98.599255][ T9355] R13: 0000000041b58ab3 R14: 0000000000000000 R15: 0000000000000000 [ 98.607212][ T9355] FS: 0000000000c2d880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 98.616126][ T9355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.622771][ T9355] CR2: 0000000020000080 CR3: 000000009bfbc000 CR4: 00000000001406e0 [ 98.630737][ T9355] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.638694][ T9355] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.646652][ T9355] Call Trace: [ 98.649935][ T9355] ? tcp_poll+0xd40/0xd40 [ 98.654255][ T9355] ? lock_downgrade+0x7f0/0x7f0 [ 98.659106][ T9355] ? rwlock_bug.part.0+0x90/0x90 [ 98.664035][ T9355] ? __local_bh_enable_ip+0x159/0x270 [ 98.669827][ T9355] ? lockdep_hardirqs_on+0x417/0x5d0 [ 98.675157][ T9355] ? do_tcp_setsockopt.isra.0+0x473/0x2430 [ 98.680974][ T9355] ? __local_bh_enable_ip+0x159/0x270 [ 98.686330][ T9355] ? do_tcp_setsockopt.isra.0+0x190/0x2430 [ 98.692133][ T9355] ? tcp_done+0x380/0x380 [ 98.696454][ T9355] ? aa_label_sk_perm+0x89/0xe0 [ 98.701454][ T9355] ? aa_sk_perm+0x319/0xab0 [ 98.705937][ T9355] ? do_page_fault+0x58b/0x12da [ 98.710770][ T9355] ? aa_af_perm+0x260/0x260 [ 98.715257][ T9355] ? tcp_getsockopt+0xb2/0xd0 [ 98.719906][ T9355] tcp_getsockopt+0xb2/0xd0 [ 98.724387][ T9355] __sys_getsockopt+0x14b/0x2e0 [ 98.729211][ T9355] ? kernel_accept+0x360/0x360 [ 98.733952][ T9355] ? down_read_non_owner+0x470/0x470 [ 98.739229][ T9355] ? handle_mm_fault+0x491/0xa10 [ 98.744158][ T9355] __x64_sys_getsockopt+0xba/0x150 [ 98.749245][ T9355] ? lockdep_hardirqs_on+0x417/0x5d0 [ 98.754515][ T9355] do_syscall_64+0xf6/0x7d0 [ 98.758996][ T9355] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.764864][ T9355] RIP: 0033:0x440239 [ 98.768735][ T9355] 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 [ 98.788362][ T9355] RSP: 002b:00007ffcad28a398 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 [ 98.796799][ T9355] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 98.804749][ T9355] RDX: 0000000000000023 RSI: 0000000000000006 RDI: 0000000000000003 [ 98.812697][ T9355] RBP: 00000000006ca018 R08: 00000000200000c0 R09: 0000000180000000 [ 98.820737][ T9355] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000401ac0 [ 98.829072][ T9355] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 98.837036][ T9355] Modules linked in: [ 98.841853][ T9355] ---[ end trace f0e4a22fa76495f5 ]--- [ 98.847452][ T9355] RIP: 0010:do_tcp_getsockopt.isra.0+0x2457/0x3480 [ 98.854010][ T9355] Code: fd ff ff 45 2b 6c 24 28 44 89 ad b0 fd ff ff e8 7f a1 ec fa 49 8d 7c 24 70 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <0f> b6 04 08 84 c0 74 08 3c 03 0f 8e a5 0f 00 00 45 8b 74 24 70 49 [ 98.873924][ T9355] RSP: 0018:ffffc90001fa7b10 EFLAGS: 00010202 [ 98.879991][ T9355] RAX: 000000000000000e RBX: 0000000000000000 RCX: dffffc0000000000 [ 98.887989][ T9355] RDX: 0000000000000000 RSI: ffffffff86857d91 RDI: 0000000000000070 [ 98.896020][ T9355] RBP: ffffc90001fa7de0 R08: ffff88809428a100 R09: ffffed10120479d8 [ 98.904102][ T9355] R10: ffffed10120479d7 R11: ffff88809023cebf R12: 0000000000000000 [ 98.912087][ T9355] R13: 0000000041b58ab3 R14: 0000000000000000 R15: 0000000000000000 [ 98.920048][ T9355] FS: 0000000000c2d880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 98.928997][ T9355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.935601][ T9355] CR2: 0000000020000080 CR3: 000000009bfbc000 CR4: 00000000001406e0 [ 98.943607][ T9355] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.951873][ T9355] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.959837][ T9355] Kernel panic - not syncing: Fatal exception [ 98.967480][ T9355] Kernel Offset: disabled [ 98.971859][ T9355] Rebooting in 86400 seconds..