[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.530410] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.932003] random: sshd: uninitialized urandom read (32 bytes read) [ 27.316686] random: sshd: uninitialized urandom read (32 bytes read) [ 27.875518] random: sshd: uninitialized urandom read (32 bytes read) [ 29.175875] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts. [ 34.952492] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 35.060162] IPVS: ftp: loaded support on port[0] = 21 [ 35.094036] ------------[ cut here ]------------ [ 35.098891] usb usb1: BOGUS urb flags, 40 --> 0 [ 35.103862] WARNING: CPU: 1 PID: 4674 at drivers/usb/core/urb.c:503 usb_submit_urb+0x719/0x14d0 [ 35.112718] Kernel panic - not syncing: panic_on_warn set ... [ 35.112718] [ 35.120068] CPU: 1 PID: 4674 Comm: syz-executor803 Not tainted 4.19.0-rc1+ #215 [ 35.127501] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.136844] Call Trace: [ 35.139424] dump_stack+0x1c9/0x2b4 [ 35.143038] ? dump_stack_print_info.cold.2+0x52/0x52 [ 35.148219] panic+0x238/0x4e7 [ 35.151401] ? add_taint.cold.5+0x16/0x16 [ 35.155553] ? __warn.cold.8+0x148/0x1ba [ 35.159601] ? __warn.cold.8+0x117/0x1ba [ 35.163650] ? usb_submit_urb+0x719/0x14d0 [ 35.167873] __warn.cold.8+0x163/0x1ba [ 35.171749] ? usb_submit_urb+0x719/0x14d0 [ 35.175970] report_bug+0x252/0x2d0 [ 35.179584] do_error_trap+0x1fc/0x4d0 [ 35.183461] ? math_error+0x3e0/0x3e0 [ 35.187249] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.192077] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 35.197084] ? vprintk_func+0x81/0x117 [ 35.200961] ? printk+0xa7/0xcf [ 35.204232] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.209064] do_invalid_op+0x1b/0x20 [ 35.212767] invalid_op+0x14/0x20 [ 35.216206] RIP: 0010:usb_submit_urb+0x719/0x14d0 [ 35.221036] Code: 08 fd 48 8b 45 d0 48 8d b8 a0 00 00 00 e8 1f ce 72 ff 45 89 e0 44 89 e9 4c 89 fa 48 89 c6 48 c7 c7 40 d8 7d 87 e8 57 ec d2 fc <0f> 0b e8 30 29 08 fd 48 c7 c6 40 d9 7d 87 4c 89 f7 e8 71 2a 08 fd [ 35.239925] RSP: 0018:ffff8801b6e5f278 EFLAGS: 00010282 [ 35.245274] RAX: 0000000000000000 RBX: ffff8801d38ae500 RCX: 0000000000000000 [ 35.252529] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: ffff8801b6e5ef68 [ 35.259781] RBP: ffff8801b6e5f2e8 R08: ffff8801b6f30100 R09: 0000000000000006 [ 35.267039] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 35.274301] R13: 0000000000000040 R14: 0000000000000000 R15: ffff8801ceb80ac0 [ 35.281579] ? vprintk_func+0x81/0x117 [ 35.285457] ? usb_submit_urb+0x719/0x14d0 [ 35.289679] ? kasan_check_write+0x14/0x20 [ 35.293906] proc_do_submiturb+0x2669/0x3d70 [ 35.298319] ? free_async+0x490/0x490 [ 35.302118] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.307642] ? _copy_from_user+0xdf/0x150 [ 35.311776] proc_submiturb_compat+0x544/0x800 [ 35.316343] ? proc_do_submiturb+0x3d70/0x3d70 [ 35.320921] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 35.326448] ? put_page+0x1bb/0x280 [ 35.330062] usbdev_do_ioctl+0x19a5/0x3b30 [ 35.334296] ? processcompl_compat+0x680/0x680 [ 35.338876] ? pmd_pfn+0x1c0/0x1c0 [ 35.342405] ? lock_downgrade+0x8f0/0x8f0 [ 35.346543] ? kasan_check_read+0x11/0x20 [ 35.350674] ? do_raw_spin_unlock+0xa7/0x2f0 [ 35.355065] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 35.359632] ? __pte_alloc_kernel+0x2e0/0x2e0 [ 35.364114] ? do_wp_page+0x87d/0x1800 [ 35.367988] ? finish_mkwrite_fault+0x540/0x540 [ 35.372643] ? lock_acquire+0x1e4/0x4f0 [ 35.376602] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 35.381255] ? lock_release+0x9f0/0x9f0 [ 35.385217] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.390743] ? kasan_check_write+0x14/0x20 [ 35.394961] ? do_raw_spin_lock+0xc1/0x200 [ 35.399183] ? __handle_mm_fault+0x945/0x4350 [ 35.403667] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 35.408493] ? graph_lock+0x170/0x170 [ 35.412278] ? graph_lock+0x170/0x170 [ 35.416069] ? find_held_lock+0x36/0x1c0 [ 35.420121] usbdev_ioctl+0x25/0x30 [ 35.423736] ? usbdev_compat_ioctl+0x30/0x30 [ 35.428134] do_vfs_ioctl+0x1de/0x1720 [ 35.432010] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 35.437534] ? ioctl_preallocate+0x300/0x300 [ 35.441927] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.447452] ? __fget_light+0x2f7/0x440 [ 35.451412] ? __handle_mm_fault+0x4350/0x4350 [ 35.455978] ? fget_raw+0x20/0x20 [ 35.459421] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.464973] ? __do_page_fault+0x449/0xe50 [ 35.469194] ? do_syscall_64+0x9a/0x820 [ 35.473153] ? do_syscall_64+0x9a/0x820 [ 35.477111] ? lockdep_hardirqs_on+0x421/0x5c0 [ 35.481681] ? security_file_ioctl+0x94/0xc0 [ 35.486076] ksys_ioctl+0xa9/0xd0 [ 35.489517] __x64_sys_ioctl+0x73/0xb0 [ 35.493390] do_syscall_64+0x1b9/0x820 [ 35.497265] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.502614] ? syscall_return_slowpath+0x5e0/0x5e0 [ 35.507528] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.512358] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 35.517363] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 35.522373] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.527894] ? prepare_exit_to_usermode+0x291/0x3b0 [ 35.532896] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.537733] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.542907] RIP: 0033:0x444799 [ 35.546082] Code: 25 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 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 0f 83 2b d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 35.564967] RSP: 002b:00000000007eff78 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 35.572661] RAX: ffffffffffffffda RBX: 00007ffdb22eee60 RCX: 0000000000444799 [ 35.579914] RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000003 [ 35.587167] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 35.594418] R10: 000000000000000f R11: 0000000000000213 R12: 0000000000402350 [ 35.601672] R13: 00000000004023e0 R14: 0000000000000000 R15: 0000000000000000 [ 35.609369] Dumping ftrace buffer: [ 35.612965] (ftrace buffer empty) [ 35.616662] Kernel Offset: disabled [ 35.620273] Rebooting in 86400 seconds..