[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 60.469159] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 61.938106] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 62.386832] random: sshd: uninitialized urandom read (32 bytes read) [ 64.065236] random: sshd: uninitialized urandom read (32 bytes read) [ 64.452503] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.78' (ECDSA) to the list of known hosts. [ 70.160540] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 70.443367] ================================================================== [ 70.450780] BUG: KMSAN: uninit-value in aa_fqlookupn_profile+0x32d/0x720 [ 70.457620] CPU: 1 PID: 6273 Comm: syz-executor790 Not tainted 4.19.0-rc4+ #65 [ 70.464973] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.474327] Call Trace: [ 70.476916] dump_stack+0x306/0x460 [ 70.480539] ? _raw_spin_lock_irqsave+0x227/0x340 [ 70.485378] ? aa_fqlookupn_profile+0x32d/0x720 [ 70.490056] kmsan_report+0x1a2/0x2e0 [ 70.493865] __msan_warning+0x7c/0xe0 [ 70.497708] aa_fqlookupn_profile+0x32d/0x720 [ 70.502210] ? __msan_warning+0x1/0xe0 [ 70.506101] aa_label_strn_parse+0x171e/0x1e30 [ 70.510696] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 70.516064] ? refcount_inc_not_zero_checked+0x5bb/0x6d0 [ 70.521518] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 70.526902] aa_label_parse+0x11f/0x130 [ 70.530882] aa_change_profile+0x827/0x3cc0 [ 70.535214] ? task_kmsan_context_state+0x6b/0x120 [ 70.540162] ? INIT_INT+0xc/0x30 [ 70.543529] ? task_kmsan_context_state+0x6b/0x120 [ 70.548479] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 70.553846] ? strcmp+0x83/0x160 [ 70.557216] apparmor_setprocattr+0x1258/0x12f0 [ 70.561909] ? apparmor_getprocattr+0x630/0x630 [ 70.566593] security_setprocattr+0x139/0x210 [ 70.571097] proc_pid_attr_write+0x3f9/0x4e0 [ 70.575531] ? proc_pid_attr_read+0x500/0x500 [ 70.580025] __vfs_write+0x1f4/0xb70 [ 70.583752] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 70.589110] ? __sb_start_write+0xf8/0x230 [ 70.593353] vfs_write+0x495/0x8e0 [ 70.596925] __se_sys_write+0x183/0x370 [ 70.600929] __x64_sys_write+0x4a/0x70 [ 70.604818] do_syscall_64+0xbe/0x100 [ 70.608632] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 70.613818] RIP: 0033:0x4400a9 [ 70.617012] 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 [ 70.635911] RSP: 002b:00007ffdbcdcd0e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 70.643616] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 70.650880] RDX: 000000000000ffd5 RSI: 00000000200000c0 RDI: 0000000000000003 [ 70.658145] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 70.665408] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 70.672672] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 70.679946] [ 70.681573] Local variable description: ----ns_name@aa_fqlookupn_profile [ 70.688437] Variable was created at: [ 70.692156] aa_fqlookupn_profile+0x79/0x720 [ 70.696556] aa_label_strn_parse+0x171e/0x1e30 [ 70.701124] ================================================================== [ 70.708469] Disabling lock debugging due to kernel taint [ 70.713909] Kernel panic - not syncing: panic_on_warn set ... [ 70.713909] [ 70.721274] CPU: 1 PID: 6273 Comm: syz-executor790 Tainted: G B 4.19.0-rc4+ #65 [ 70.730011] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.739363] Call Trace: [ 70.741952] dump_stack+0x306/0x460 [ 70.745590] panic+0x54c/0xafa [ 70.748819] kmsan_report+0x2d3/0x2e0 [ 70.752638] __msan_warning+0x7c/0xe0 [ 70.756453] aa_fqlookupn_profile+0x32d/0x720 [ 70.760952] ? __msan_warning+0x1/0xe0 [ 70.764852] aa_label_strn_parse+0x171e/0x1e30 [ 70.769449] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 70.774811] ? refcount_inc_not_zero_checked+0x5bb/0x6d0 [ 70.780273] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 70.785637] aa_label_parse+0x11f/0x130 [ 70.789617] aa_change_profile+0x827/0x3cc0 [ 70.793958] ? task_kmsan_context_state+0x6b/0x120 [ 70.798891] ? INIT_INT+0xc/0x30 [ 70.802256] ? task_kmsan_context_state+0x6b/0x120 [ 70.807207] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 70.812568] ? strcmp+0x83/0x160 [ 70.815941] apparmor_setprocattr+0x1258/0x12f0 [ 70.820633] ? apparmor_getprocattr+0x630/0x630 [ 70.825300] security_setprocattr+0x139/0x210 [ 70.829814] proc_pid_attr_write+0x3f9/0x4e0 [ 70.834240] ? proc_pid_attr_read+0x500/0x500 [ 70.838733] __vfs_write+0x1f4/0xb70 [ 70.842459] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 70.847816] ? __sb_start_write+0xf8/0x230 [ 70.852064] vfs_write+0x495/0x8e0 [ 70.855620] __se_sys_write+0x183/0x370 [ 70.859605] __x64_sys_write+0x4a/0x70 [ 70.863493] do_syscall_64+0xbe/0x100 [ 70.867293] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 70.872502] RIP: 0033:0x4400a9 [ 70.875691] 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 [ 70.894586] RSP: 002b:00007ffdbcdcd0e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 70.902292] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 70.909567] RDX: 000000000000ffd5 RSI: 00000000200000c0 RDI: 0000000000000003 [ 70.916834] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 70.924096] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 70.931375] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 70.939690] Kernel Offset: disabled [ 70.943344] Rebooting in 86400 seconds..