[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 44.517632] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 45.285250] random: sshd: uninitialized urandom read (32 bytes read) [ 45.797301] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 46.756658] random: sshd: uninitialized urandom read (32 bytes read) [ 47.060389] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.75' (ECDSA) to the list of known hosts. [ 52.707912] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 52.855480] ================================================================== [ 52.862876] BUG: KMSAN: uninit-value in aa_fqlookupn_profile+0x33a/0x750 [ 52.869707] CPU: 0 PID: 4488 Comm: syz-executor533 Not tainted 4.19.0-rc4+ #57 [ 52.877051] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.886391] Call Trace: [ 52.888957] dump_stack+0x2f6/0x430 [ 52.892571] kmsan_report+0x183/0x2b0 [ 52.896362] __msan_warning+0x70/0xc0 [ 52.900145] aa_fqlookupn_profile+0x33a/0x750 [ 52.904649] aa_label_strn_parse+0x179e/0x1f30 [ 52.909225] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 52.914567] ? strlen+0x51/0xa0 [ 52.917830] aa_label_parse+0x11f/0x130 [ 52.921786] aa_change_profile+0x979/0x41d0 [ 52.926099] ? kmsan_set_origin_inline+0x6b/0x120 [ 52.930925] ? INIT_INT+0xc/0x30 [ 52.934269] ? trace_kmalloc+0x12f/0x350 [ 52.938313] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 52.943680] ? strcmp+0x83/0x160 [ 52.947051] apparmor_setprocattr+0x121a/0x12f0 [ 52.951818] ? apparmor_getprocattr+0x6c0/0x6c0 [ 52.956581] security_setprocattr+0x139/0x210 [ 52.961158] proc_pid_attr_write+0x3f9/0x4e0 [ 52.965552] ? proc_pid_attr_read+0x4d0/0x4d0 [ 52.970029] __vfs_write+0x1a8/0xa50 [ 52.973741] ? __sb_start_write+0x9f/0x2d0 [ 52.977976] vfs_write+0x495/0x8e0 [ 52.981501] __se_sys_write+0x173/0x350 [ 52.985458] __x64_sys_write+0x4a/0x70 [ 52.989323] do_syscall_64+0xb8/0x100 [ 52.993121] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 52.998289] RIP: 0033:0x4400a9 [ 53.001462] 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 [ 53.020481] RSP: 002b:00007ffdc73bcde8 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 53.028172] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 53.035422] RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003 [ 53.042677] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.049955] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 53.057293] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 53.064559] [ 53.066171] Local variable description: ----ns_name@aa_fqlookupn_profile [ 53.072982] Variable was created at: [ 53.076686] aa_fqlookupn_profile+0x81/0x750 [ 53.081085] aa_label_strn_parse+0x179e/0x1f30 [ 53.085645] ================================================================== [ 53.092992] Disabling lock debugging due to kernel taint [ 53.098417] Kernel panic - not syncing: panic_on_warn set ... [ 53.098417] [ 53.105870] CPU: 0 PID: 4488 Comm: syz-executor533 Tainted: G B 4.19.0-rc4+ #57 [ 53.114609] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.123941] Call Trace: [ 53.126508] dump_stack+0x2f6/0x430 [ 53.130117] panic+0x54c/0xaf7 [ 53.133330] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 53.138766] kmsan_report+0x2a8/0x2b0 [ 53.142566] __msan_warning+0x70/0xc0 [ 53.146355] aa_fqlookupn_profile+0x33a/0x750 [ 53.150840] aa_label_strn_parse+0x179e/0x1f30 [ 53.155418] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 53.160762] ? strlen+0x51/0xa0 [ 53.164027] aa_label_parse+0x11f/0x130 [ 53.167996] aa_change_profile+0x979/0x41d0 [ 53.172297] ? kmsan_set_origin_inline+0x6b/0x120 [ 53.177148] ? INIT_INT+0xc/0x30 [ 53.180493] ? trace_kmalloc+0x12f/0x350 [ 53.184540] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 53.189884] ? strcmp+0x83/0x160 [ 53.193233] apparmor_setprocattr+0x121a/0x12f0 [ 53.197893] ? apparmor_getprocattr+0x6c0/0x6c0 [ 53.202540] security_setprocattr+0x139/0x210 [ 53.207018] proc_pid_attr_write+0x3f9/0x4e0 [ 53.211410] ? proc_pid_attr_read+0x4d0/0x4d0 [ 53.215885] __vfs_write+0x1a8/0xa50 [ 53.219579] ? __sb_start_write+0x9f/0x2d0 [ 53.223804] vfs_write+0x495/0x8e0 [ 53.227335] __se_sys_write+0x173/0x350 [ 53.231295] __x64_sys_write+0x4a/0x70 [ 53.235167] do_syscall_64+0xb8/0x100 [ 53.238950] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 53.244118] RIP: 0033:0x4400a9 [ 53.247378] 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 [ 53.266256] RSP: 002b:00007ffdc73bcde8 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 53.273942] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 53.281191] RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003 [ 53.288761] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.296009] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 53.303272] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 53.311050] Kernel Offset: disabled [ 53.314670] Rebooting in 86400 seconds..