[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.133557][ T24] audit: type=1800 audit(1563556544.236:25): pid=8396 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.178033][ T24] audit: type=1800 audit(1563556544.236:26): pid=8396 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.213693][ T24] audit: type=1800 audit(1563556544.246:27): pid=8396 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 '10.128.1.28' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.423382][ T8551] BUG: unable to handle page fault for address: ffff8880d3b276aa [ 72.431222][ T8551] #PF: supervisor read access in kernel mode [ 72.437189][ T8551] #PF: error_code(0x0000) - not-present page [ 72.443179][ T8551] PGD b401067 P4D b401067 PUD 0 [ 72.448111][ T8551] Oops: 0000 [#1] PREEMPT SMP KASAN [ 72.453286][ T8551] CPU: 0 PID: 8551 Comm: syz-executor898 Not tainted 5.2.0+ #93 [ 72.460893][ T8551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.471057][ T8551] RIP: 0010:bpf_prog_9e69188709424cd0+0xb05/0x1000 [ 72.477536][ T8551] Code: cc cc cc 55 48 89 e5 48 81 ec 00 00 00 00 53 41 55 41 56 41 57 6a 00 31 c0 48 8b bf c0 00 00 00 44 8b 97 bc 00 00 00 4c 01 d7 <48> 0f b7 7f 06 5b 41 5f 41 5e 41 5d 5b c9 c3 cc cc cc cc cc cc cc [ 72.497114][ T8551] RSP: 0018:ffff8880974e7a98 EFLAGS: 00010282 [ 72.503153][ T8551] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: dffffc0000000000 [ 72.511099][ T8551] RDX: 0000000000000000 RSI: ffffc90005dcf038 RDI: ffff8880d3b276a4 [ 72.519052][ T8551] RBP: ffff8880974e7ac0 R08: ffff888099bfe600 R09: 0000000000000000 [ 72.527015][ T8551] R10: 00000000316abb64 R11: 0000000000000000 R12: 0000000000000001 [ 72.535079][ T8551] R13: 0000000000000000 R14: ffff8880974e7ba8 R15: ffff888099bfe600 [ 72.543032][ T8551] FS: 0000555555a9f940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 72.551936][ T8551] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.558586][ T8551] CR2: ffff8880d3b276aa CR3: 0000000093f6a000 CR4: 00000000001406f0 [ 72.566536][ T8551] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.574493][ T8551] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.582458][ T8551] Call Trace: [ 72.585754][ T8551] bpf_test_run+0x31f/0xac0 [ 72.590245][ T8551] ? copy_overflow+0x30/0x30 [ 72.594822][ T8551] ? __build_skb+0x58/0x70 [ 72.599221][ T8551] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.605442][ T8551] bpf_prog_test_run_skb+0x939/0x1310 [ 72.610795][ T8551] ? bpf_test_init.isra.0+0x100/0x100 [ 72.616147][ T8551] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.622382][ T8551] ? bpf_prog_add+0x69/0xd0 [ 72.626876][ T8551] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.633111][ T8551] ? __bpf_prog_get+0x97/0x290 [ 72.637857][ T8551] ? bpf_test_init.isra.0+0x100/0x100 [ 72.643226][ T8551] __do_sys_bpf+0x15b4/0x42f0 [ 72.647880][ T8551] ? bpf_prog_load+0x1670/0x1670 [ 72.652817][ T8551] ? lock_downgrade+0x920/0x920 [ 72.657742][ T8551] ? __kasan_check_write+0x14/0x20 [ 72.662974][ T8551] ? up_read+0x159/0x570 [ 72.667200][ T8551] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 72.672638][ T8551] ? do_syscall_64+0x26/0x6a0 [ 72.677292][ T8551] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.683339][ T8551] ? do_syscall_64+0x26/0x6a0 [ 72.687999][ T8551] __x64_sys_bpf+0x73/0xb0 [ 72.692426][ T8551] do_syscall_64+0xfd/0x6a0 [ 72.697019][ T8551] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.702899][ T8551] RIP: 0033:0x4421f9 [ 72.706792][ T8551] Code: e8 6c aa 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 72.726372][ T8551] RSP: 002b:00007ffffc237838 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 72.734823][ T8551] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004421f9 [ 72.742800][ T8551] RDX: 0000000000000028 RSI: 0000000020000040 RDI: 000000000000000a [ 72.750752][ T8551] RBP: 0000000000000000 R08: 00000000004030b0 R09: 00000000004030b0 [ 72.758718][ T8551] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000403020 [ 72.766674][ T8551] R13: 00000000004030b0 R14: 0000000000000000 R15: 0000000000000000 [ 72.774639][ T8551] Modules linked in: [ 72.778517][ T8551] CR2: ffff8880d3b276aa [ 72.782659][ T8551] ---[ end trace bf2c0907e446af02 ]--- [ 72.788097][ T8551] RIP: 0010:bpf_prog_9e69188709424cd0+0xb05/0x1000 [ 72.794586][ T8551] Code: cc cc cc 55 48 89 e5 48 81 ec 00 00 00 00 53 41 55 41 56 41 57 6a 00 31 c0 48 8b bf c0 00 00 00 44 8b 97 bc 00 00 00 4c 01 d7 <48> 0f b7 7f 06 5b 41 5f 41 5e 41 5d 5b c9 c3 cc cc cc cc cc cc cc [ 72.814507][ T8551] RSP: 0018:ffff8880974e7a98 EFLAGS: 00010282 [ 72.820562][ T8551] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: dffffc0000000000 [ 72.828511][ T8551] RDX: 0000000000000000 RSI: ffffc90005dcf038 RDI: ffff8880d3b276a4 [ 72.836459][ T8551] RBP: ffff8880974e7ac0 R08: ffff888099bfe600 R09: 0000000000000000 [ 72.844419][ T8551] R10: 00000000316abb64 R11: 0000000000000000 R12: 0000000000000001 [ 72.852381][ T8551] R13: 0000000000000000 R14: ffff8880974e7ba8 R15: ffff888099bfe600 [ 72.860333][ T8551] FS: 0000555555a9f940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 72.869236][ T8551] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.875794][ T8551] CR2: ffff8880d3b276aa CR3: 0000000093f6a000 CR4: 00000000001406f0 [ 72.883758][ T8551] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.891733][ T8551] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.899683][ T8551] Kernel panic - not syncing: Fatal exception [ 72.906927][ T8551] Kernel Offset: disabled [ 72.911274][ T8551] Rebooting in 86400 seconds..