[ 58.677345] sshd (6182) used greatest stack depth: 53184 bytes left [?25l[?1c[ 58.860019] random: sshd: uninitialized urandom read (32 bytes read) 7[ ok 8[?25h[?0c. [ 59.092057] audit: type=1800 audit(1539130481.135:29): pid=6079 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 59.630498] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 61.378196] random: sshd: uninitialized urandom read (32 bytes read) [ 61.750883] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.98' (ECDSA) to the list of known hosts. [ 67.506423] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 67.768525] ================================================================== [ 67.775923] BUG: KMSAN: uninit-value in aa_fqlookupn_profile+0x32d/0x720 [ 67.782776] CPU: 0 PID: 6229 Comm: syz-executor106 Not tainted 4.19.0-rc4+ #65 [ 67.790121] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.799482] Call Trace: [ 67.802068] dump_stack+0x306/0x460 [ 67.805692] ? _raw_spin_lock_irqsave+0x227/0x340 [ 67.810531] ? aa_fqlookupn_profile+0x32d/0x720 [ 67.815224] kmsan_report+0x1a2/0x2e0 [ 67.819026] __msan_warning+0x7c/0xe0 [ 67.822825] aa_fqlookupn_profile+0x32d/0x720 [ 67.827319] ? __msan_warning+0x1/0xe0 [ 67.831203] aa_label_strn_parse+0x171e/0x1e30 [ 67.835795] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 67.841153] ? refcount_inc_not_zero_checked+0x5bb/0x6d0 [ 67.846620] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 67.851998] aa_label_parse+0x11f/0x130 [ 67.855991] aa_change_profile+0x827/0x3cc0 [ 67.860306] ? task_kmsan_context_state+0x6b/0x120 [ 67.865236] ? INIT_INT+0xc/0x30 [ 67.868594] ? task_kmsan_context_state+0x6b/0x120 [ 67.873537] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 67.878893] ? strcmp+0x83/0x160 [ 67.882264] apparmor_setprocattr+0x1258/0x12f0 [ 67.886947] ? apparmor_getprocattr+0x630/0x630 [ 67.891608] security_setprocattr+0x139/0x210 [ 67.896108] proc_pid_attr_write+0x3f9/0x4e0 [ 67.900534] ? proc_pid_attr_read+0x500/0x500 [ 67.905037] __vfs_write+0x1f4/0xb70 [ 67.908772] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 67.914148] ? __sb_start_write+0xf8/0x230 [ 67.918389] vfs_write+0x495/0x8e0 [ 67.921939] __se_sys_write+0x183/0x370 [ 67.925918] __x64_sys_write+0x4a/0x70 [ 67.929797] do_syscall_64+0xbe/0x100 [ 67.933595] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 67.938778] RIP: 0033:0x440059 [ 67.941959] 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 [ 67.960851] RSP: 002b:00007fff235e08d8 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 67.968554] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440059 [ 67.975831] RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000003 [ 67.983093] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.990349] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018e0 [ 67.997632] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 68.004915] [ 68.006528] Local variable description: ----ns_name@aa_fqlookupn_profile [ 68.013351] Variable was created at: [ 68.017064] aa_fqlookupn_profile+0x79/0x720 [ 68.021459] aa_label_strn_parse+0x171e/0x1e30 [ 68.026025] ================================================================== [ 68.033375] Disabling lock debugging due to kernel taint [ 68.038828] Kernel panic - not syncing: panic_on_warn set ... [ 68.038828] [ 68.046190] CPU: 0 PID: 6229 Comm: syz-executor106 Tainted: G B 4.19.0-rc4+ #65 [ 68.054943] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.064302] Call Trace: [ 68.066888] dump_stack+0x306/0x460 [ 68.070525] panic+0x54c/0xafa [ 68.073749] kmsan_report+0x2d3/0x2e0 [ 68.077553] __msan_warning+0x7c/0xe0 [ 68.081352] aa_fqlookupn_profile+0x32d/0x720 [ 68.085857] ? __msan_warning+0x1/0xe0 [ 68.089747] aa_label_strn_parse+0x171e/0x1e30 [ 68.094340] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 68.099703] ? refcount_inc_not_zero_checked+0x5bb/0x6d0 [ 68.105163] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 68.110524] aa_label_parse+0x11f/0x130 [ 68.114499] aa_change_profile+0x827/0x3cc0 [ 68.118816] ? task_kmsan_context_state+0x6b/0x120 [ 68.123744] ? INIT_INT+0xc/0x30 [ 68.127103] ? task_kmsan_context_state+0x6b/0x120 [ 68.132052] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 68.137416] ? strcmp+0x83/0x160 [ 68.140777] apparmor_setprocattr+0x1258/0x12f0 [ 68.145464] ? apparmor_getprocattr+0x630/0x630 [ 68.150155] security_setprocattr+0x139/0x210 [ 68.154662] proc_pid_attr_write+0x3f9/0x4e0 [ 68.159072] ? proc_pid_attr_read+0x500/0x500 [ 68.163561] __vfs_write+0x1f4/0xb70 [ 68.167278] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 68.172636] ? __sb_start_write+0xf8/0x230 [ 68.176876] vfs_write+0x495/0x8e0 [ 68.180438] __se_sys_write+0x183/0x370 [ 68.184417] __x64_sys_write+0x4a/0x70 [ 68.188297] do_syscall_64+0xbe/0x100 [ 68.192097] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 68.197277] RIP: 0033:0x440059 [ 68.200460] 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 [ 68.219354] RSP: 002b:00007fff235e08d8 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 68.227061] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440059 [ 68.234320] RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000003 [ 68.241577] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 68.248835] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018e0 [ 68.256098] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 68.264355] Kernel Offset: disabled [ 68.268000] Rebooting in 86400 seconds..