[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 54.604809][ T26] audit: type=1800 audit(1563556473.001:25): pid=8548 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 54.634371][ T26] audit: type=1800 audit(1563556473.001:26): pid=8548 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 54.675809][ T26] audit: type=1800 audit(1563556473.001:27): pid=8548 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 '10.128.10.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.337916][ T8700] BUG: unable to handle page fault for address: ffff8880d153002a [ 63.345658][ T8700] #PF: supervisor read access in kernel mode [ 63.351626][ T8700] #PF: error_code(0x0000) - not-present page [ 63.357787][ T8700] PGD b601067 P4D b601067 PUD 0 [ 63.362708][ T8700] Oops: 0000 [#1] PREEMPT SMP KASAN [ 63.367887][ T8700] CPU: 1 PID: 8700 Comm: syz-executor350 Not tainted 5.2.0-next-20190718 #41 [ 63.376615][ T8700] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.386697][ T8700] RIP: 0010:bpf_prog_9e69188709424cd0+0x621/0x1000 [ 63.393188][ T8700] 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 [ 63.412961][ T8700] RSP: 0018:ffff88808d3efa98 EFLAGS: 00010286 [ 63.419039][ T8700] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: dffffc0000000000 [ 63.426985][ T8700] RDX: 0000000000000000 RSI: ffffc90005f3d038 RDI: ffff8880d1530024 [ 63.434929][ T8700] RBP: ffff88808d3efac0 R08: ffff8880a4fe8600 R09: 0000000000000000 [ 63.442890][ T8700] R10: 00000000316abb64 R11: 0000000000000000 R12: 0000000000000001 [ 63.450838][ T8700] R13: 0000000000000000 R14: ffff88808d3efba8 R15: ffff8880a4fe8600 [ 63.458788][ T8700] FS: 00005555573d2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 63.467800][ T8700] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.474376][ T8700] CR2: ffff8880d153002a CR3: 000000009ae09000 CR4: 00000000001406e0 [ 63.482323][ T8700] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.490269][ T8700] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.498226][ T8700] Call Trace: [ 63.501499][ T8700] bpf_test_run+0x31f/0xac0 [ 63.505986][ T8700] ? copy_overflow+0x30/0x30 [ 63.510551][ T8700] ? __build_skb+0x58/0x70 [ 63.514967][ T8700] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.521182][ T8700] bpf_prog_test_run_skb+0x939/0x1310 [ 63.526530][ T8700] ? bpf_test_init.isra.0+0x100/0x100 [ 63.531878][ T8700] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.538091][ T8700] ? bpf_prog_add+0x69/0xd0 [ 63.542573][ T8700] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.548789][ T8700] ? __bpf_prog_get+0x97/0x290 [ 63.553532][ T8700] ? bpf_test_init.isra.0+0x100/0x100 [ 63.558878][ T8700] __do_sys_bpf+0x15b4/0x42f0 [ 63.563796][ T8700] ? bpf_prog_load+0x1670/0x1670 [ 63.568714][ T8700] ? lock_downgrade+0x920/0x920 [ 63.573555][ T8700] ? __kasan_check_write+0x14/0x20 [ 63.578642][ T8700] ? up_read+0x159/0x570 [ 63.582866][ T8700] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 63.588306][ T8700] ? do_syscall_64+0x26/0x6a0 [ 63.592965][ T8700] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.599010][ T8700] ? do_syscall_64+0x26/0x6a0 [ 63.603663][ T8700] __x64_sys_bpf+0x73/0xb0 [ 63.608071][ T8700] do_syscall_64+0xfd/0x6a0 [ 63.612564][ T8700] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.618438][ T8700] RIP: 0033:0x4404a9 [ 63.622324][ T8700] Code: 23 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 90 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 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.642096][ T8700] RSP: 002b:00007ffd99445bf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 63.650483][ T8700] RAX: ffffffffffffffda RBX: 00007ffd99445c00 RCX: 00000000004404a9 [ 63.658434][ T8700] RDX: 0000000000000028 RSI: 0000000020000040 RDI: 000000000000000a [ 63.666385][ T8700] RBP: 00000000006cb018 R08: 6c616b7a79732f2e R09: 6c616b7a79732f2e [ 63.674336][ T8700] R10: 0000000000401d47 R11: 0000000000000246 R12: 0000000000401cd0 [ 63.682294][ T8700] R13: 0000000000401d60 R14: 0000000000000000 R15: 0000000000000000 [ 63.690244][ T8700] Modules linked in: [ 63.694115][ T8700] CR2: ffff8880d153002a [ 63.698265][ T8700] ---[ end trace 4dd790c7ddffa7e0 ]--- [ 63.703737][ T8700] RIP: 0010:bpf_prog_9e69188709424cd0+0x621/0x1000 [ 63.710213][ T8700] 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 [ 63.729809][ T8700] RSP: 0018:ffff88808d3efa98 EFLAGS: 00010286 [ 63.735944][ T8700] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: dffffc0000000000 [ 63.743890][ T8700] RDX: 0000000000000000 RSI: ffffc90005f3d038 RDI: ffff8880d1530024 [ 63.756099][ T8700] RBP: ffff88808d3efac0 R08: ffff8880a4fe8600 R09: 0000000000000000 [ 63.769827][ T8700] R10: 00000000316abb64 R11: 0000000000000000 R12: 0000000000000001 [ 63.777786][ T8700] R13: 0000000000000000 R14: ffff88808d3efba8 R15: ffff8880a4fe8600 [ 63.785738][ T8700] FS: 00005555573d2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 63.794642][ T8700] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.801217][ T8700] CR2: ffff8880d153002a CR3: 000000009ae09000 CR4: 00000000001406e0 [ 63.809181][ T8700] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.817145][ T8700] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.825112][ T8700] Kernel panic - not syncing: Fatal exception [ 63.832314][ T8700] Kernel Offset: disabled [ 63.836636][ T8700] Rebooting in 86400 seconds..