[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.781204] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.407870] random: sshd: uninitialized urandom read (32 bytes read) [ 28.629301] random: sshd: uninitialized urandom read (32 bytes read) [ 29.200702] random: sshd: uninitialized urandom read (32 bytes read) [ 36.328597] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. [ 41.960416] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 42.072062] IPVS: ftp: loaded support on port[0] = 21 [ 42.106924] ------------[ cut here ]------------ [ 42.111734] usb usb1: BOGUS urb flags, 40 --> 0 [ 42.116723] WARNING: CPU: 1 PID: 4679 at drivers/usb/core/urb.c:503 usb_submit_urb+0x719/0x14d0 [ 42.125572] Kernel panic - not syncing: panic_on_warn set ... [ 42.125572] [ 42.132924] CPU: 1 PID: 4679 Comm: syz-executor974 Not tainted 4.19.0-rc1+ #215 [ 42.140353] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.149763] Call Trace: [ 42.152351] dump_stack+0x1c9/0x2b4 [ 42.155972] ? dump_stack_print_info.cold.2+0x52/0x52 [ 42.161157] panic+0x238/0x4e7 [ 42.164345] ? add_taint.cold.5+0x16/0x16 [ 42.168482] ? __warn.cold.8+0x148/0x1ba [ 42.172574] ? __warn.cold.8+0x117/0x1ba [ 42.176634] ? usb_submit_urb+0x719/0x14d0 [ 42.180863] __warn.cold.8+0x163/0x1ba [ 42.184744] ? usb_submit_urb+0x719/0x14d0 [ 42.188969] report_bug+0x252/0x2d0 [ 42.192585] do_error_trap+0x1fc/0x4d0 [ 42.196462] ? math_error+0x3e0/0x3e0 [ 42.200634] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.205465] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 42.210468] ? vprintk_func+0x81/0x117 [ 42.214345] ? printk+0xa7/0xcf [ 42.217640] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.222473] do_invalid_op+0x1b/0x20 [ 42.226184] invalid_op+0x14/0x20 [ 42.229631] RIP: 0010:usb_submit_urb+0x719/0x14d0 [ 42.234460] 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 [ 42.253471] RSP: 0018:ffff8801c8337278 EFLAGS: 00010282 [ 42.258826] RAX: 0000000000000000 RBX: ffff8801d3f94b00 RCX: 0000000000000000 [ 42.266082] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: ffff8801c8336f68 [ 42.273345] RBP: ffff8801c83372e8 R08: ffff8801b6d42240 R09: 0000000000000006 [ 42.280612] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 42.287874] R13: 0000000000000040 R14: 0000000000000000 R15: ffff8801ceb22840 [ 42.295149] ? vprintk_func+0x81/0x117 [ 42.299039] ? usb_submit_urb+0x719/0x14d0 [ 42.303268] ? kasan_check_write+0x14/0x20 [ 42.307498] proc_do_submiturb+0x2669/0x3d70 [ 42.311905] ? free_async+0x490/0x490 [ 42.315747] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.321284] ? _copy_from_user+0xdf/0x150 [ 42.325438] proc_submiturb_compat+0x544/0x800 [ 42.330010] ? proc_do_submiturb+0x3d70/0x3d70 [ 42.334582] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 42.340113] ? put_page+0x1bb/0x280 [ 42.343734] usbdev_do_ioctl+0x19a5/0x3b30 [ 42.347960] ? processcompl_compat+0x680/0x680 [ 42.352533] ? pmd_pfn+0x1c0/0x1c0 [ 42.356158] ? lock_downgrade+0x8f0/0x8f0 [ 42.360309] ? kasan_check_read+0x11/0x20 [ 42.364451] ? do_raw_spin_unlock+0xa7/0x2f0 [ 42.368848] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 42.373424] ? __pte_alloc_kernel+0x2e0/0x2e0 [ 42.377910] ? do_wp_page+0x87d/0x1800 [ 42.381784] ? finish_mkwrite_fault+0x540/0x540 [ 42.386443] ? lock_acquire+0x1e4/0x4f0 [ 42.390409] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 42.395068] ? lock_release+0x9f0/0x9f0 [ 42.399032] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.404559] ? kasan_check_write+0x14/0x20 [ 42.408779] ? do_raw_spin_lock+0xc1/0x200 [ 42.413005] ? __handle_mm_fault+0x945/0x4350 [ 42.417549] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 42.422395] ? graph_lock+0x170/0x170 [ 42.426195] ? graph_lock+0x170/0x170 [ 42.430091] ? find_held_lock+0x36/0x1c0 [ 42.434216] usbdev_ioctl+0x25/0x30 [ 42.437845] ? usbdev_compat_ioctl+0x30/0x30 [ 42.442244] do_vfs_ioctl+0x1de/0x1720 [ 42.446123] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 42.451647] ? ioctl_preallocate+0x300/0x300 [ 42.456113] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.461647] ? __fget_light+0x2f7/0x440 [ 42.465697] ? __handle_mm_fault+0x4350/0x4350 [ 42.470289] ? fget_raw+0x20/0x20 [ 42.473735] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.479263] ? __do_page_fault+0x449/0xe50 [ 42.483501] ? do_syscall_64+0x9a/0x820 [ 42.487464] ? do_syscall_64+0x9a/0x820 [ 42.491429] ? lockdep_hardirqs_on+0x421/0x5c0 [ 42.496006] ? security_file_ioctl+0x94/0xc0 [ 42.500421] ksys_ioctl+0xa9/0xd0 [ 42.503871] __x64_sys_ioctl+0x73/0xb0 [ 42.507758] do_syscall_64+0x1b9/0x820 [ 42.511635] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.516988] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.521904] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.526888] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 42.531895] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.536904] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.542435] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.547445] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.552283] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.557468] RIP: 0033:0x444759 [ 42.560649] 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 [ 42.579542] RSP: 002b:00000000007eff78 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 42.587367] RAX: ffffffffffffffda RBX: 00007ffd75413e40 RCX: 0000000000444759 [ 42.594650] RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000003 [ 42.601917] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 42.609185] R10: 000000000000000f R11: 0000000000000213 R12: 0000000000402310 [ 42.616447] R13: 00000000004023a0 R14: 0000000000000000 R15: 0000000000000000 [ 42.624178] Dumping ftrace buffer: [ 42.627806] (ftrace buffer empty) [ 42.631507] Kernel Offset: disabled [ 42.635122] Rebooting in 86400 seconds..