[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 35.097709] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.895922] random: sshd: uninitialized urandom read (32 bytes read) [ 38.219783] random: sshd: uninitialized urandom read (32 bytes read) [ 39.627296] random: sshd: uninitialized urandom read (32 bytes read) [ 39.872575] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.57' (ECDSA) to the list of known hosts. [ 45.478635] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 45.602902] ------------[ cut here ]------------ [ 45.602908] precision 1047878 too large [ 45.602917] WARNING: CPU: 0 PID: 4596 at lib/vsprintf.c:2164 vsnprintf+0x2e77/0x3450 [ 45.602922] Kernel panic - not syncing: panic_on_warn set ... [ 45.602925] [ 45.602931] CPU: 0 PID: 4596 Comm: syz-executor076 Not tainted 4.18.0-rc4+ #26 [ 45.602938] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.602942] Call Trace: [ 45.602946] dump_stack+0x185/0x1e0 [ 45.602950] panic+0x3d0/0x9b0 [ 45.602953] __warn+0x40f/0x580 [ 45.602957] ? vsnprintf+0x2e77/0x3450 [ 45.602962] report_bug+0x72a/0x880 [ 45.602966] ? vsnprintf+0x2e77/0x3450 [ 45.602970] ? vsnprintf+0x2e77/0x3450 [ 45.602974] do_error_trap+0x1fe/0x710 [ 45.602978] ? vprintk+0x67/0x80 [ 45.602982] do_invalid_op+0x46/0x50 [ 45.602986] invalid_op+0x14/0x20 [ 45.602990] RIP: 0010:vsnprintf+0x2e77/0x3450 [ 45.602993] Code: 00 00 89 88 48 06 00 00 89 90 68 09 00 00 48 c7 80 80 0c 00 00 00 00 00 00 48 c7 c7 28 0a ed 8a 31 c0 44 89 fe e8 b9 b4 ed f6 <0f> 0b 48 8b 45 c8 48 89 85 60 ff ff ff 48 8d 7d c8 e8 03 cf 90 f7 [ 45.603157] RSP: 0018:ffff88019b11f630 EFLAGS: 00010046 [ 45.603166] RAX: 88979dd74b678300 RBX: fd4600000ffd4600 RCX: 88979dd74b678300 [ 45.603172] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: 0000000000000000 [ 45.603177] RBP: ffff88019b11f748 R08: ffffffff7fffffff R09: 0000000000000000 [ 45.603183] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8ba0158a [ 45.603189] R13: fffffffffffffd46 R14: 0000000000000000 R15: 00000000000ffd46 [ 45.603193] vscnprintf+0xc2/0x180 [ 45.603197] vprintk_emit+0x246/0x1120 [ 45.603202] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 45.603207] vprintk_default+0x90/0xa0 [ 45.603211] vprintk_func+0x132/0x170 [ 45.603214] printk+0x1f1/0x230 [ 45.603219] dns_resolver_preparse+0x10e6/0x1770 [ 45.603223] ? wimax_debugfs_rm+0x70/0x70 [ 45.603227] ? wimax_debugfs_rm+0x70/0x70 [ 45.603232] key_create_or_update+0x822/0x1ce0 [ 45.603236] __se_sys_add_key+0x760/0x9c0 [ 45.603240] __x64_sys_add_key+0x15d/0x1b0 [ 45.603245] ? keyring_detect_cycle_iterator+0x110/0x110 [ 45.603249] do_syscall_64+0x15b/0x230 [ 45.603254] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 45.603258] RIP: 0033:0x440099 [ 45.603260] 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 [ 45.603423] RSP: 002b:00007ffc16b592d8 EFLAGS: 00000286 ORIG_RAX: 00000000000000f8 [ 45.603434] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440099 [ 45.603440] RDX: 00000000200000c0 RSI: 0000000020000000 RDI: 0000000020000080 [ 45.603445] RBP: 00000000006ca018 R08: 00000000fffffffb R09: 00000000004002c8 [ 45.603451] R10: 00000000000fffff R11: 0000000000000286 R12: 0000000000401920 [ 45.603457] R13: 00000000004019b0 R14: 0000000000000000 R15: 0000000000000000 [ 45.603461] Dumping ftrace buffer: [ 45.603469] (ftrace buffer empty) [ 45.603473] Kernel Offset: disabled