[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 42.767923] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 47.474193] random: sshd: uninitialized urandom read (32 bytes read) [ 47.868882] random: sshd: uninitialized urandom read (32 bytes read) [ 48.862010] random: sshd: uninitialized urandom read (32 bytes read) [ 58.923098] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts. [ 64.562391] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 64.749105] ================================================================== [ 64.756797] BUG: KMSAN: uninit-value in aa_fqlookupn_profile+0x33a/0x750 [ 64.763848] CPU: 1 PID: 4469 Comm: syz-executor560 Not tainted 4.19.0-rc4+ #59 [ 64.771181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.780518] Call Trace: [ 64.783209] dump_stack+0x2f6/0x430 [ 64.786825] kmsan_report+0x183/0x2b0 [ 64.790621] __msan_warning+0x70/0xc0 [ 64.794414] aa_fqlookupn_profile+0x33a/0x750 [ 64.798895] aa_label_strn_parse+0x179e/0x1f30 [ 64.803472] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 64.808819] ? strlen+0x51/0xa0 [ 64.812079] aa_label_parse+0x11f/0x130 [ 64.816345] aa_change_profile+0x979/0x41d0 [ 64.820671] ? kmsan_set_origin_inline+0x6b/0x120 [ 64.825512] ? INIT_INT+0xc/0x30 [ 64.828863] ? trace_kmalloc+0x12f/0x350 [ 64.832908] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 64.838254] ? strcmp+0x83/0x160 [ 64.841622] apparmor_setprocattr+0x121a/0x12f0 [ 64.846395] ? apparmor_getprocattr+0x6c0/0x6c0 [ 64.851055] security_setprocattr+0x139/0x210 [ 64.855537] proc_pid_attr_write+0x3f9/0x4e0 [ 64.860096] ? proc_pid_attr_read+0x4d0/0x4d0 [ 64.864591] __vfs_write+0x1a8/0xa50 [ 64.868304] ? __sb_start_write+0x9f/0x2d0 [ 64.872527] vfs_write+0x495/0x8e0 [ 64.876058] __se_sys_write+0x173/0x350 [ 64.880032] __x64_sys_write+0x4a/0x70 [ 64.884035] do_syscall_64+0xb8/0x100 [ 64.887819] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 64.892992] RIP: 0033:0x4400a9 [ 64.896175] 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 [ 64.915067] RSP: 002b:00007ffea2482e08 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 64.922755] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 64.930006] RDX: 000000000000002c RSI: 0000000020000000 RDI: 0000000000000003 [ 64.937488] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 64.944754] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 64.952234] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 64.959491] [ 64.961142] Local variable description: ----ns_name@aa_fqlookupn_profile [ 64.967956] Variable was created at: [ 64.971658] aa_fqlookupn_profile+0x81/0x750 [ 64.976049] aa_label_strn_parse+0x179e/0x1f30 [ 64.980606] ================================================================== [ 64.988201] Disabling lock debugging due to kernel taint [ 64.993630] Kernel panic - not syncing: panic_on_warn set ... [ 64.993630] [ 65.000971] CPU: 1 PID: 4469 Comm: syz-executor560 Tainted: G B 4.19.0-rc4+ #59 [ 65.009698] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.019023] Call Trace: [ 65.021591] dump_stack+0x2f6/0x430 [ 65.025286] panic+0x54c/0xaf7 [ 65.028477] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 65.033906] kmsan_report+0x2a8/0x2b0 [ 65.037686] __msan_warning+0x70/0xc0 [ 65.041465] aa_fqlookupn_profile+0x33a/0x750 [ 65.045943] aa_label_strn_parse+0x179e/0x1f30 [ 65.050510] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 65.056002] ? strlen+0x51/0xa0 [ 65.059265] aa_label_parse+0x11f/0x130 [ 65.063222] aa_change_profile+0x979/0x41d0 [ 65.067522] ? kmsan_set_origin_inline+0x6b/0x120 [ 65.072354] ? INIT_INT+0xc/0x30 [ 65.075703] ? trace_kmalloc+0x12f/0x350 [ 65.079744] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 65.085101] ? strcmp+0x83/0x160 [ 65.088446] apparmor_setprocattr+0x121a/0x12f0 [ 65.093119] ? apparmor_getprocattr+0x6c0/0x6c0 [ 65.097763] security_setprocattr+0x139/0x210 [ 65.102238] proc_pid_attr_write+0x3f9/0x4e0 [ 65.106898] ? proc_pid_attr_read+0x4d0/0x4d0 [ 65.111481] __vfs_write+0x1a8/0xa50 [ 65.115179] ? __sb_start_write+0x9f/0x2d0 [ 65.119398] vfs_write+0x495/0x8e0 [ 65.122919] __se_sys_write+0x173/0x350 [ 65.126959] __x64_sys_write+0x4a/0x70 [ 65.130829] do_syscall_64+0xb8/0x100 [ 65.134616] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 65.139781] RIP: 0033:0x4400a9 [ 65.142954] 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 [ 65.162164] RSP: 002b:00007ffea2482e08 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 65.169852] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 65.177103] RDX: 000000000000002c RSI: 0000000020000000 RDI: 0000000000000003 [ 65.184363] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 65.191620] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 65.198877] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 65.206610] Kernel Offset: disabled [ 65.210229] Rebooting in 86400 seconds..