[ OK ] Found device /dev/ttyS0. [ OK ] Started Permit User Sessions. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started System Logging Service. [ *** ] A start job is running for OpenBSD …Shell server (1min 28s / 2min 46s)[ ***] A start job is running for OpenBSD …Shell server (1min 28s / 2min 46s)[ **] A start job is running for OpenBSD …Shell server (1min 29s / 2min 46s)[ *] A start job is running for OpenBSD …Shell server (1min 30s / 2min 46s)[ **] A start job is running for OpenBSD …ure Shell server (1min 31s / 3min)[ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.102' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 145.324314][ T8230] ===================================================== [ 145.331263][ T8230] BUG: KMSAN: uninit-value in ppp_async_push+0xd0b/0x21a0 [ 145.338397][ T8230] CPU: 0 PID: 8230 Comm: syz-executor476 Not tainted 5.12.0-rc6-syzkaller #0 [ 145.347150][ T8230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 145.357246][ T8230] Call Trace: [ 145.361042][ T8230] dump_stack+0x24c/0x2e0 [ 145.365376][ T8230] kmsan_report+0xfb/0x1e0 [ 145.369793][ T8230] __msan_warning+0x5c/0xa0 [ 145.374305][ T8230] ppp_async_push+0xd0b/0x21a0 [ 145.379107][ T8230] ? kmsan_get_metadata+0x116/0x180 [ 145.384307][ T8230] ? kmsan_internal_set_origin+0x85/0xc0 [ 145.389961][ T8230] ppp_async_send+0x144/0x1e0 [ 145.394651][ T8230] ? async_lcp_peek+0xe20/0xe20 [ 145.399516][ T8230] __ppp_channel_push+0x1a7/0x3b0 [ 145.404565][ T8230] ppp_write+0x785/0x810 [ 145.408814][ T8230] ? ppp_read+0xde0/0xde0 [ 145.413134][ T8230] vfs_write+0x6cc/0x1b00 [ 145.417474][ T8230] ? kmsan_internal_set_origin+0x85/0xc0 [ 145.423121][ T8230] ? kmsan_get_metadata+0x116/0x180 [ 145.428366][ T8230] ksys_write+0x275/0x500 [ 145.432691][ T8230] __se_sys_write+0x92/0xb0 [ 145.437205][ T8230] __x64_sys_write+0x4a/0x70 [ 145.441840][ T8230] do_syscall_64+0x9f/0x140 [ 145.446366][ T8230] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 145.452252][ T8230] RIP: 0033:0x43fd49 [ 145.456134][ T8230] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 145.475763][ T8230] RSP: 002b:00007ffcdfdf22c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 145.484203][ T8230] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043fd49 [ 145.492205][ T8230] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 145.500189][ T8230] RBP: 0000000000000000 R08: 00007ffcdfdf2468 R09: 00007ffcdfdf2468 [ 145.508177][ T8230] R10: 00007ffcdfdf2468 R11: 0000000000000246 R12: 00000000004035d0 [ 145.516169][ T8230] R13: 431bde82d7b634db R14: 00000000004ae018 R15: 0000000000400488 [ 145.524160][ T8230] [ 145.526489][ T8230] Uninit was created at: [ 145.530731][ T8230] kmsan_internal_poison_shadow+0x5c/0xf0 [ 145.536450][ T8230] kmsan_slab_alloc+0x8e/0xe0 [ 145.541119][ T8230] __kmalloc_node_track_caller+0xa4f/0x1470 [ 145.547253][ T8230] __alloc_skb+0x4dd/0xe90 [ 145.551864][ T8230] ppp_write+0x11f/0x810 [ 145.556411][ T8230] vfs_write+0x6cc/0x1b00 [ 145.560750][ T8230] ksys_write+0x275/0x500 [ 145.565085][ T8230] __se_sys_write+0x92/0xb0 [ 145.569582][ T8230] __x64_sys_write+0x4a/0x70 executing program executing program executing program [ 145.574160][ T8230] do_syscall_64+0x9f/0x140 [ 145.578664][ T8230] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 145.584662][ T8230] ===================================================== [ 145.591687][ T8230] Disabling lock debugging due to kernel taint executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program