[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.180169] audit: type=1800 audit(1538727688.732:25): pid=5672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 36.213404] audit: type=1800 audit(1538727688.732:26): pid=5672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 36.237824] audit: type=1800 audit(1538727688.742:27): pid=5672 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 '10.128.0.73' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 47.645722] kauditd_printk_skb: 3 callbacks suppressed [ 47.645734] audit: type=1400 audit(1538727700.192:31): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=5871 comm="syz-executor906" [ 47.676964] audit: type=1400 audit(1538727700.232:32): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=5876 comm="syz-executor906" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.994971] audit: type=1400 audit(1538727700.542:33): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=6072 comm="syz-executor906" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 48.172547] audit: type=1400 audit(1538727700.722:34): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=6179 comm="syz-executor906" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 48.786222] audit: type=1400 audit(1538727701.342:35): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=6563 comm="syz-executor906" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 48.981841] audit: type=1400 audit(1538727701.532:36): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=6674 comm="syz-executor906" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 49.087253] audit: type=1400 audit(1538727701.642:37): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=6730 comm="syz-executor906" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 49.225158] audit: type=1400 audit(1538727701.772:38): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=6811 comm="syz-executor906" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 49.517741] kasan: CONFIG_KASAN_INLINE enabled [ 49.522336] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 49.529921] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 49.536159] CPU: 0 PID: 6989 Comm: syz-executor906 Not tainted 4.19.0-rc6+ #171 [ 49.543626] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.552981] RIP: 0010:memcmp+0x28/0x160 [ 49.556939] Code: 00 00 48 85 d2 0f 84 0a 01 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 f9 48 89 e5 48 c1 e9 03 41 54 53 48 89 fb 48 83 ec 18 <0f> b6 04 01 48 89 f9 83 e1 07 38 c8 7f 08 84 c0 0f 85 98 00 00 00 [ 49.575827] RSP: 0018:ffff8801ce206f48 EFLAGS: 00010296 [ 49.581174] RAX: dffffc0000000000 RBX: 1ffff10039c40e43 RCX: 03fffe20073881c8 [ 49.588474] RDX: 0000000000000002 RSI: ffffffff883ba580 RDI: 1ffff10039c40e43 [ 49.595734] RBP: ffff8801ce206f70 R08: ffff8801ba27e240 R09: 0000000000000000 [ 49.602983] R10: ffffed0039c40e50 R11: 0000000000000000 R12: 0000000000000002 [ 49.610245] R13: ffffffff883ba580 R14: 1fff790207e48143 R15: dffffc0000000000 [ 49.617513] FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:0000000008ee5840 [ 49.625728] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 49.631593] CR2: 0000000020000200 CR3: 00000001d1e0c000 CR4: 00000000001406f0 [ 49.638884] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.646151] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.653399] Call Trace: [ 49.655988] strnstr+0x4b/0x70 [ 49.659183] __aa_lookupn_ns+0xc1/0x570 [ 49.663144] ? aa_find_ns+0x30/0x30 [ 49.666761] ? lock_acquire+0x1ed/0x520 [ 49.670728] ? __aa_lookupn_ns+0x570/0x570 [ 49.675485] ? lock_release+0x970/0x970 [ 49.679445] ? ima_match_policy+0x848/0x1560 [ 49.683844] ? lock_downgrade+0x900/0x900 [ 49.687974] ? do_raw_spin_lock+0xc1/0x200 [ 49.692193] aa_lookupn_ns+0x88/0x1e0 [ 49.695987] aa_fqlookupn_profile+0x1b9/0x1010 [ 49.700579] ? __lockdep_init_map+0x105/0x590 [ 49.705059] ? aa_lookup_profile+0x30/0x30 [ 49.709287] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.714809] ? refcount_inc_not_zero_checked+0x1e5/0x2f0 [ 49.720240] ? refcount_add_not_zero_checked+0x330/0x330 [ 49.725671] ? mark_held_locks+0x130/0x130 [ 49.729894] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.735414] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.740935] fqlookupn_profile+0x80/0xc0 [ 49.744984] aa_label_strn_parse+0xa3a/0x1230 [ 49.749468] ? aa_label_printk+0x850/0x850 [ 49.753690] ? refcount_sub_and_test_checked+0x203/0x310 [ 49.759137] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.764670] ? refcount_inc_not_zero_checked+0x1e5/0x2f0 [ 49.770114] ? refcount_add_not_zero_checked+0x330/0x330 [ 49.775561] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.780575] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 49.785317] aa_label_parse+0x42/0x50 [ 49.789104] aa_change_profile+0x513/0x3260 [ 49.793417] ? lock_acquire+0x1ed/0x520 [ 49.797389] ? aa_change_hat+0x1890/0x1890 [ 49.801607] ? is_bpf_text_address+0xd3/0x170 [ 49.806115] ? __mutex_lock+0x85e/0x1700 [ 49.810158] ? proc_pid_attr_write+0x28a/0x540 [ 49.814722] ? mutex_trylock+0x2b0/0x2b0 [ 49.818772] ? save_stack+0xa9/0xd0 [ 49.822392] ? save_stack+0x43/0xd0 [ 49.825999] ? kasan_kmalloc+0xc7/0xe0 [ 49.829873] ? __kmalloc_track_caller+0x14a/0x750 [ 49.835235] ? memdup_user+0x2c/0xa0 [ 49.840180] ? proc_pid_attr_write+0x198/0x540 [ 49.844919] ? __vfs_write+0x119/0x9f0 [ 49.848789] ? vfs_write+0x1fc/0x560 [ 49.852485] ? ksys_write+0x101/0x260 [ 49.856277] ? __ia32_sys_write+0x71/0xb0 [ 49.860409] ? do_fast_syscall_32+0x34d/0xfb2 [ 49.864890] ? entry_SYSENTER_compat+0x70/0x7f [ 49.869467] ? mark_held_locks+0x130/0x130 [ 49.873695] apparmor_setprocattr+0xa8b/0x1150 [ 49.878277] ? cache_grow_end+0xa8/0x190 [ 49.882323] ? apparmor_task_kill+0xcb0/0xcb0 [ 49.886799] ? lock_downgrade+0x900/0x900 [ 49.890933] ? arch_local_save_flags+0x40/0x40 [ 49.895519] security_setprocattr+0x66/0xc0 [ 49.899830] proc_pid_attr_write+0x301/0x540 [ 49.904232] __vfs_write+0x119/0x9f0 [ 49.907935] ? proc_loginuid_write+0x4f0/0x4f0 [ 49.912497] ? kernel_read+0x120/0x120 [ 49.916367] ? lock_release+0x970/0x970 [ 49.920324] ? arch_local_save_flags+0x40/0x40 [ 49.924890] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.930409] ? check_preemption_disabled+0x48/0x200 [ 49.935406] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.940923] ? __sb_start_write+0x1b2/0x370 [ 49.945260] vfs_write+0x1fc/0x560 [ 49.948801] ksys_write+0x101/0x260 [ 49.952424] ? __ia32_sys_read+0xb0/0xb0 [ 49.956487] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 49.961919] __ia32_sys_write+0x71/0xb0 [ 49.965880] do_fast_syscall_32+0x34d/0xfb2 [ 49.970186] ? do_int80_syscall_32+0x890/0x890 [ 49.974753] ? entry_SYSENTER_compat+0x68/0x7f [ 49.979325] ? trace_hardirqs_off_caller+0xbb/0x310 [ 49.984336] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.989158] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.993992] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.998990] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.003986] ? prepare_exit_to_usermode+0x291/0x3b0 [ 50.008995] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.013912] entry_SYSENTER_compat+0x70/0x7f [ 50.018316] RIP: 0023:0xf7fb2ca9 [ 50.021663] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 50.040544] RSP: 002b:00000000ffdd8dfc EFLAGS: 00000246 ORIG_RAX: 0000000000000004 [ 50.048285] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200000c0 [ 50.055557] RDX: 000000000000ffd5 RSI: 00000000ffdd8f44 RDI: 00000000ffdd8f4c [ 50.062815] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 50.070068] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 50.077319] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 50.084571] Modules linked in: [ 50.088435] ---[ end trace d8c64a2d6ad61856 ]--- [ 50.093205] RIP: 0010:memcmp+0x28/0x160 [ 50.097232] Code: 00 00 48 85 d2 0f 84 0a 01 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 f9 48 89 e5 48 c1 e9 03 41 54 53 48 89 fb 48 83 ec 18 <0f> b6 04 01 48 89 f9 83 e1 07 38 c8 7f 08 84 c0 0f 85 98 00 00 00 [ 50.116184] RSP: 0018:ffff8801ce206f48 EFLAGS: 00010296 [ 50.121556] RAX: dffffc0000000000 RBX: 1ffff10039c40e43 RCX: 03fffe20073881c8 [ 50.128855] RDX: 0000000000000002 RSI: ffffffff883ba580 RDI: 1ffff10039c40e43 [ 50.136161] RBP: ffff8801ce206f70 R08: ffff8801ba27e240 R09: 0000000000000000 [ 50.143418] R10: ffffed0039c40e50 R11: 0000000000000000 R12: 0000000000000002 [ 50.150739] R13: ffffffff883ba580 R14: 1fff790207e48143 R15: dffffc0000000000 [ 50.158025] FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:0000000008ee5840 [ 50.166358] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 50.172251] CR2: 0000000020000200 CR3: 00000001d1e0c000 CR4: 00000000001406f0 [ 50.179567] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.186888] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.194677] Kernel panic - not syncing: Fatal exception [ 50.201232] Kernel Offset: disabled [ 50.204864] Rebooting in 86400 seconds..