[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.268225] audit: type=1800 audit(1539485640.318:25): pid=6103 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.287728] audit: type=1800 audit(1539485640.318:26): pid=6103 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.307248] audit: type=1800 audit(1539485640.338:27): pid=6103 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 '10.128.10.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.083728] ================================================================== [ 73.091162] BUG: KMSAN: uninit-value in aa_fqlookupn_profile+0x32d/0x720 [ 73.097999] CPU: 1 PID: 6256 Comm: syz-executor667 Not tainted 4.19.0-rc7+ #69 [ 73.105353] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.114702] Call Trace: [ 73.117304] dump_stack+0x306/0x460 [ 73.120961] ? _raw_spin_lock_irqsave+0x227/0x340 [ 73.125830] ? aa_fqlookupn_profile+0x32d/0x720 [ 73.130523] kmsan_report+0x1a2/0x2e0 [ 73.134342] __msan_warning+0x7c/0xe0 [ 73.138165] aa_fqlookupn_profile+0x32d/0x720 [ 73.142671] ? __msan_warning+0x71/0xe0 [ 73.146652] aa_label_strn_parse+0x171e/0x1e30 [ 73.151256] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 73.156646] ? refcount_inc_not_zero_checked+0x5bb/0x6d0 [ 73.162109] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 73.167484] aa_label_parse+0x11f/0x130 [ 73.171495] aa_change_profile+0x827/0x3cc0 [ 73.175826] ? task_kmsan_context_state+0x6b/0x120 [ 73.180761] ? INIT_INT+0xc/0x30 [ 73.184130] ? task_kmsan_context_state+0x6b/0x120 [ 73.189082] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 73.194449] ? strcmp+0x83/0x160 [ 73.197824] apparmor_setprocattr+0xbc3/0x12f0 [ 73.202444] ? apparmor_getprocattr+0x630/0x630 [ 73.207152] security_setprocattr+0x139/0x210 [ 73.211690] proc_pid_attr_write+0x3f9/0x4e0 [ 73.216142] ? proc_pid_attr_read+0x500/0x500 [ 73.220652] __vfs_write+0x1f4/0xb70 [ 73.224393] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 73.229776] ? __sb_start_write+0xf8/0x230 [ 73.234036] vfs_write+0x495/0x8e0 [ 73.237601] __se_sys_write+0x183/0x370 [ 73.241638] __x64_sys_write+0x4a/0x70 [ 73.245555] do_syscall_64+0xbe/0x100 [ 73.249376] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 73.254576] RIP: 0033:0x440059 [ 73.257770] 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 [ 73.277287] RSP: 002b:00007ffc860feb18 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 73.285003] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440059 [ 73.292275] RDX: 0000000000000009 RSI: 0000000020000280 RDI: 0000000000000003 [ 73.299543] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 73.306816] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018e0 [ 73.314087] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 73.321370] [ 73.322993] Local variable description: ----ns_name@aa_fqlookupn_profile [ 73.329832] Variable was created at: [ 73.333565] aa_fqlookupn_profile+0x79/0x720 [ 73.337984] aa_label_strn_parse+0x171e/0x1e30 [ 73.342569] ================================================================== [ 73.349926] Disabling lock debugging due to kernel taint [ 73.355394] Kernel panic - not syncing: panic_on_warn set ... [ 73.355394] [ 73.362776] CPU: 1 PID: 6256 Comm: syz-executor667 Tainted: G B 4.19.0-rc7+ #69 [ 73.371520] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.380886] Call Trace: [ 73.383484] dump_stack+0x306/0x460 [ 73.387128] panic+0x54c/0xafa [ 73.390356] kmsan_report+0x2d3/0x2e0 [ 73.394165] __msan_warning+0x7c/0xe0 [ 73.397974] aa_fqlookupn_profile+0x32d/0x720 [ 73.402482] ? __msan_warning+0x71/0xe0 [ 73.406464] aa_label_strn_parse+0x171e/0x1e30 [ 73.411077] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 73.416460] ? refcount_inc_not_zero_checked+0x5bb/0x6d0 [ 73.421940] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 73.427321] aa_label_parse+0x11f/0x130 [ 73.431318] aa_change_profile+0x827/0x3cc0 [ 73.435661] ? task_kmsan_context_state+0x6b/0x120 [ 73.440610] ? INIT_INT+0xc/0x30 [ 73.443988] ? task_kmsan_context_state+0x6b/0x120 [ 73.448955] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 73.454324] ? strcmp+0x83/0x160 [ 73.457706] apparmor_setprocattr+0xbc3/0x12f0 [ 73.462328] ? apparmor_getprocattr+0x630/0x630 [ 73.467007] security_setprocattr+0x139/0x210 [ 73.471518] proc_pid_attr_write+0x3f9/0x4e0 [ 73.475947] ? proc_pid_attr_read+0x500/0x500 [ 73.480454] __vfs_write+0x1f4/0xb70 [ 73.484190] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 73.489560] ? __sb_start_write+0xf8/0x230 [ 73.493811] vfs_write+0x495/0x8e0 [ 73.497374] __se_sys_write+0x183/0x370 [ 73.501363] __x64_sys_write+0x4a/0x70 [ 73.505253] do_syscall_64+0xbe/0x100 [ 73.509061] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 73.514243] RIP: 0033:0x440059 [ 73.517444] 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 [ 73.536349] RSP: 002b:00007ffc860feb18 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 73.544061] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440059 [ 73.551330] RDX: 0000000000000009 RSI: 0000000020000280 RDI: 0000000000000003 [ 73.558599] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 73.565871] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018e0 [ 73.573144] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 73.581439] Kernel Offset: disabled [ 73.585093] Rebooting in 86400 seconds..