[ 52.160099] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.978922] random: sshd: uninitialized urandom read (32 bytes read) [ 53.334999] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 54.635057] random: sshd: uninitialized urandom read (32 bytes read) [ 86.314791] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.74' (ECDSA) to the list of known hosts. [ 92.186890] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 92.372708] ================================================================== [ 92.380252] BUG: KMSAN: uninit-value in aa_fqlookupn_profile+0x33a/0x750 [ 92.387090] CPU: 0 PID: 4663 Comm: syz-executor299 Not tainted 4.19.0-rc4+ #56 [ 92.394440] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.403783] Call Trace: [ 92.406387] dump_stack+0x2f6/0x430 [ 92.410035] kmsan_report+0x183/0x2b0 [ 92.413872] __msan_warning+0x70/0xc0 [ 92.417688] aa_fqlookupn_profile+0x33a/0x750 [ 92.422199] aa_label_strn_parse+0x179e/0x1f30 [ 92.426824] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 92.432527] ? strlen+0x51/0xa0 [ 92.435841] aa_label_parse+0x11f/0x130 [ 92.439818] aa_change_profile+0x979/0x41d0 [ 92.444139] ? __kmalloc_track_caller+0xc04/0xe50 [ 92.448981] ? memdup_user+0x7c/0x1e0 [ 92.452783] ? __vfs_write+0x1a8/0xa50 [ 92.456668] ? task_kmsan_context_state+0x5e/0x110 [ 92.461597] ? INIT_INT+0xc/0x30 [ 92.464960] ? _raw_spin_lock_irqsave+0x21a/0x310 [ 92.469821] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 92.475335] ? strcmp+0x83/0x160 [ 92.478710] apparmor_setprocattr+0x121a/0x12f0 [ 92.483402] ? apparmor_getprocattr+0x6c0/0x6c0 [ 92.488142] security_setprocattr+0x139/0x210 [ 92.492657] proc_pid_attr_write+0x3f9/0x4e0 [ 92.497317] ? proc_pid_attr_read+0x4d0/0x4d0 [ 92.502007] __vfs_write+0x1a8/0xa50 [ 92.505787] ? __sb_start_write+0x9f/0x2d0 [ 92.510037] vfs_write+0x495/0x8e0 [ 92.513584] __se_sys_write+0x173/0x350 [ 92.517561] __x64_sys_write+0x4a/0x70 [ 92.521443] do_syscall_64+0xb8/0x100 [ 92.525238] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 92.530551] RIP: 0033:0x440059 [ 92.533742] 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 [ 92.552739] RSP: 002b:00007ffd4b1e0f18 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 92.560449] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440059 [ 92.567711] RDX: 0000000000000009 RSI: 0000000020000040 RDI: 0000000000000003 [ 92.574973] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 92.582230] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018e0 [ 92.589589] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 92.596908] [ 92.598533] Local variable description: ----ns_name@aa_fqlookupn_profile [ 92.605360] Variable was created at: [ 92.609227] aa_fqlookupn_profile+0x81/0x750 [ 92.613693] aa_label_strn_parse+0x179e/0x1f30 [ 92.618265] ================================================================== [ 92.625618] Disabling lock debugging due to kernel taint [ 92.631215] Kernel panic - not syncing: panic_on_warn set ... [ 92.631215] [ 92.638584] CPU: 0 PID: 4663 Comm: syz-executor299 Tainted: G B 4.19.0-rc4+ #56 [ 92.647322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.656728] Call Trace: [ 92.659323] dump_stack+0x2f6/0x430 [ 92.662955] panic+0x54c/0xaf7 [ 92.666230] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 92.671692] kmsan_report+0x2a8/0x2b0 [ 92.675496] __msan_warning+0x70/0xc0 [ 92.679298] aa_fqlookupn_profile+0x33a/0x750 [ 92.683855] aa_label_strn_parse+0x179e/0x1f30 [ 92.688696] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 92.694070] ? strlen+0x51/0xa0 [ 92.697355] aa_label_parse+0x11f/0x130 [ 92.701382] aa_change_profile+0x979/0x41d0 [ 92.705719] ? __kmalloc_track_caller+0xc04/0xe50 [ 92.710602] ? memdup_user+0x7c/0x1e0 [ 92.714414] ? __vfs_write+0x1a8/0xa50 [ 92.718301] ? task_kmsan_context_state+0x5e/0x110 [ 92.723238] ? INIT_INT+0xc/0x30 [ 92.726605] ? _raw_spin_lock_irqsave+0x21a/0x310 [ 92.731465] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 92.736892] ? strcmp+0x83/0x160 [ 92.740272] apparmor_setprocattr+0x121a/0x12f0 [ 92.744963] ? apparmor_getprocattr+0x6c0/0x6c0 [ 92.749642] security_setprocattr+0x139/0x210 [ 92.754160] proc_pid_attr_write+0x3f9/0x4e0 [ 92.758581] ? proc_pid_attr_read+0x4d0/0x4d0 [ 92.763075] __vfs_write+0x1a8/0xa50 [ 92.766853] ? __sb_start_write+0x9f/0x2d0 [ 92.771208] vfs_write+0x495/0x8e0 [ 92.774763] __se_sys_write+0x173/0x350 [ 92.778753] __x64_sys_write+0x4a/0x70 [ 92.782761] do_syscall_64+0xb8/0x100 [ 92.786566] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 92.791752] RIP: 0033:0x440059 [ 92.794937] 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 [ 92.813833] RSP: 002b:00007ffd4b1e0f18 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 92.821541] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440059 [ 92.828853] RDX: 0000000000000009 RSI: 0000000020000040 RDI: 0000000000000003 [ 92.836128] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 92.843391] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018e0 [ 92.850667] R13: 0000000000401970 R14: 0000000000000000 R15: 0000000000000000 [ 92.858264] Kernel Offset: disabled [ 92.861898] Rebooting in 86400 seconds..