[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 52.266968] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 53.030527] random: sshd: uninitialized urandom read (32 bytes read) [ 53.456752] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 54.750988] random: sshd: uninitialized urandom read (32 bytes read) [ 55.171371] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 60.848861] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 61.022505] ================================================================== [ 61.029910] BUG: KMSAN: uninit-value in aa_fqlookupn_profile+0x33a/0x750 [ 61.036759] CPU: 0 PID: 4668 Comm: syz-executor737 Not tainted 4.19.0-rc4+ #57 [ 61.044111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.053453] Call Trace: [ 61.056038] dump_stack+0x2f6/0x430 [ 61.059681] kmsan_report+0x183/0x2b0 [ 61.063490] __msan_warning+0x70/0xc0 [ 61.067290] aa_fqlookupn_profile+0x33a/0x750 [ 61.071819] aa_label_strn_parse+0x179e/0x1f30 [ 61.076446] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 61.081824] ? strlen+0x51/0xa0 [ 61.085103] aa_label_parse+0x11f/0x130 [ 61.089096] aa_change_profile+0x979/0x41d0 [ 61.093418] ? kmsan_set_origin_inline+0x6b/0x120 [ 61.098271] ? INIT_INT+0xc/0x30 [ 61.101655] ? trace_kmalloc+0x12f/0x350 [ 61.105734] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 61.111094] ? strcmp+0x83/0x160 [ 61.114461] apparmor_setprocattr+0x121a/0x12f0 [ 61.119154] ? apparmor_getprocattr+0x6c0/0x6c0 [ 61.123817] security_setprocattr+0x139/0x210 [ 61.128335] proc_pid_attr_write+0x3f9/0x4e0 [ 61.132763] ? proc_pid_attr_read+0x4d0/0x4d0 [ 61.137257] __vfs_write+0x1a8/0xa50 [ 61.140967] ? __sb_start_write+0x9f/0x2d0 [ 61.145245] vfs_write+0x495/0x8e0 [ 61.148801] __se_sys_write+0x173/0x350 [ 61.152789] __x64_sys_write+0x4a/0x70 [ 61.156690] do_syscall_64+0xb8/0x100 [ 61.160503] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 61.165685] RIP: 0033:0x4400a9 [ 61.168869] 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 [ 61.187762] RSP: 002b:00007fffe3317638 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 61.195464] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 61.202727] RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003 [ 61.209985] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 61.217247] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 61.224509] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 61.231784] [ 61.233402] Local variable description: ----ns_name@aa_fqlookupn_profile [ 61.240241] Variable was created at: [ 61.243966] aa_fqlookupn_profile+0x81/0x750 [ 61.248369] aa_label_strn_parse+0x179e/0x1f30 [ 61.252936] ================================================================== [ 61.260311] Disabling lock debugging due to kernel taint [ 61.265751] Kernel panic - not syncing: panic_on_warn set ... [ 61.265751] [ 61.273111] CPU: 0 PID: 4668 Comm: syz-executor737 Tainted: G B 4.19.0-rc4+ #57 [ 61.281846] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.291188] Call Trace: [ 61.293771] dump_stack+0x2f6/0x430 [ 61.297422] panic+0x54c/0xaf7 [ 61.300667] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 61.306153] kmsan_report+0x2a8/0x2b0 [ 61.309957] __msan_warning+0x70/0xc0 [ 61.313758] aa_fqlookupn_profile+0x33a/0x750 [ 61.318265] aa_label_strn_parse+0x179e/0x1f30 [ 61.322878] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 61.328234] ? strlen+0x51/0xa0 [ 61.331513] aa_label_parse+0x11f/0x130 [ 61.335490] aa_change_profile+0x979/0x41d0 [ 61.339812] ? kmsan_set_origin_inline+0x6b/0x120 [ 61.344690] ? INIT_INT+0xc/0x30 [ 61.348068] ? trace_kmalloc+0x12f/0x350 [ 61.352137] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 61.357497] ? strcmp+0x83/0x160 [ 61.360865] apparmor_setprocattr+0x121a/0x12f0 [ 61.365554] ? apparmor_getprocattr+0x6c0/0x6c0 [ 61.370225] security_setprocattr+0x139/0x210 [ 61.374730] proc_pid_attr_write+0x3f9/0x4e0 [ 61.379163] ? proc_pid_attr_read+0x4d0/0x4d0 [ 61.383665] __vfs_write+0x1a8/0xa50 [ 61.387378] ? __sb_start_write+0x9f/0x2d0 [ 61.391646] vfs_write+0x495/0x8e0 [ 61.395207] __se_sys_write+0x173/0x350 [ 61.399186] __x64_sys_write+0x4a/0x70 [ 61.403067] do_syscall_64+0xb8/0x100 [ 61.406863] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 61.412042] RIP: 0033:0x4400a9 [ 61.415225] 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 [ 61.434121] RSP: 002b:00007fffe3317638 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 61.441824] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 61.449088] RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003 [ 61.456363] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 61.463636] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 61.470910] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 61.478596] Kernel Offset: disabled [ 61.482231] Rebooting in 86400 seconds..