[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.652567] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.310932] random: sshd: uninitialized urandom read (32 bytes read) [ 27.619097] random: sshd: uninitialized urandom read (32 bytes read) [ 28.195962] random: sshd: uninitialized urandom read (32 bytes read) [ 28.773209] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts. [ 34.389669] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 34.494085] IPVS: ftp: loaded support on port[0] = 21 [ 34.528104] ------------[ cut here ]------------ [ 34.532923] usb usb1: BOGUS urb flags, 40 --> 0 [ 34.538012] WARNING: CPU: 1 PID: 4669 at drivers/usb/core/urb.c:503 usb_submit_urb+0x719/0x14d0 [ 34.546961] Kernel panic - not syncing: panic_on_warn set ... [ 34.546961] [ 34.554313] CPU: 1 PID: 4669 Comm: syz-executor184 Not tainted 4.19.0-rc1+ #215 [ 34.561747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.571098] Call Trace: [ 34.573683] dump_stack+0x1c9/0x2b4 [ 34.577420] ? dump_stack_print_info.cold.2+0x52/0x52 [ 34.582604] panic+0x238/0x4e7 [ 34.585785] ? add_taint.cold.5+0x16/0x16 [ 34.589921] ? __warn.cold.8+0x148/0x1ba [ 34.593966] ? __warn.cold.8+0x117/0x1ba [ 34.598200] ? usb_submit_urb+0x719/0x14d0 [ 34.602429] __warn.cold.8+0x163/0x1ba [ 34.606306] ? usb_submit_urb+0x719/0x14d0 [ 34.610596] report_bug+0x252/0x2d0 [ 34.614217] do_error_trap+0x1fc/0x4d0 [ 34.618094] ? math_error+0x3e0/0x3e0 [ 34.621884] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.626720] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 34.631732] ? vprintk_func+0x81/0x117 [ 34.635617] ? printk+0xa7/0xcf [ 34.638935] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.643781] do_invalid_op+0x1b/0x20 [ 34.647501] invalid_op+0x14/0x20 [ 34.650946] RIP: 0010:usb_submit_urb+0x719/0x14d0 [ 34.655776] 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 [ 34.674770] RSP: 0018:ffff8801c9cef278 EFLAGS: 00010282 [ 34.680121] RAX: 0000000000000000 RBX: ffff8801d73b0700 RCX: 0000000000000000 [ 34.687440] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: ffff8801c9ceef68 [ 34.694699] RBP: ffff8801c9cef2e8 R08: ffff8801b7f001c0 R09: 0000000000000006 [ 34.702007] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 34.709368] R13: 0000000000000040 R14: 0000000000000000 R15: ffff8801ceb67800 [ 34.716638] ? vprintk_func+0x81/0x117 [ 34.720516] ? usb_submit_urb+0x719/0x14d0 [ 34.724746] ? kasan_check_write+0x14/0x20 [ 34.728972] proc_do_submiturb+0x2669/0x3d70 [ 34.733375] ? free_async+0x490/0x490 [ 34.737172] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.742699] ? _copy_from_user+0xdf/0x150 [ 34.746850] proc_submiturb_compat+0x544/0x800 [ 34.751420] ? proc_do_submiturb+0x3d70/0x3d70 [ 34.755996] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 34.761523] ? put_page+0x1bb/0x280 [ 34.765161] usbdev_do_ioctl+0x19a5/0x3b30 [ 34.769402] ? processcompl_compat+0x680/0x680 [ 34.773978] ? pmd_pfn+0x1c0/0x1c0 [ 34.777517] ? lock_downgrade+0x8f0/0x8f0 [ 34.781654] ? kasan_check_read+0x11/0x20 [ 34.785839] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.790244] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 34.794857] ? __pte_alloc_kernel+0x2e0/0x2e0 [ 34.799350] ? do_wp_page+0x87d/0x1800 [ 34.803228] ? finish_mkwrite_fault+0x540/0x540 [ 34.807884] ? lock_acquire+0x1e4/0x4f0 [ 34.811890] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 34.816555] ? lock_release+0x9f0/0x9f0 [ 34.820620] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.826148] ? kasan_check_write+0x14/0x20 [ 34.830373] ? do_raw_spin_lock+0xc1/0x200 [ 34.834607] ? __handle_mm_fault+0x945/0x4350 [ 34.839097] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 34.844048] ? graph_lock+0x170/0x170 [ 34.847885] ? graph_lock+0x170/0x170 [ 34.851688] ? find_held_lock+0x36/0x1c0 [ 34.855752] usbdev_ioctl+0x25/0x30 [ 34.859371] ? usbdev_compat_ioctl+0x30/0x30 [ 34.863774] do_vfs_ioctl+0x1de/0x1720 [ 34.867653] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 34.873180] ? ioctl_preallocate+0x300/0x300 [ 34.877575] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.883101] ? __fget_light+0x2f7/0x440 [ 34.887065] ? __handle_mm_fault+0x4350/0x4350 [ 34.891638] ? fget_raw+0x20/0x20 [ 34.895094] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.900625] ? __do_page_fault+0x449/0xe50 [ 34.904851] ? do_syscall_64+0x9a/0x820 [ 34.908819] ? do_syscall_64+0x9a/0x820 [ 34.912779] ? lockdep_hardirqs_on+0x421/0x5c0 [ 34.917351] ? security_file_ioctl+0x94/0xc0 [ 34.921778] ksys_ioctl+0xa9/0xd0 [ 34.925404] __x64_sys_ioctl+0x73/0xb0 [ 34.929287] do_syscall_64+0x1b9/0x820 [ 34.933169] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.938530] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.943443] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.948273] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 34.953282] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 34.958293] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.963827] ? prepare_exit_to_usermode+0x291/0x3b0 [ 34.968839] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.973679] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.978854] RIP: 0033:0x444759 [ 34.982036] 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 [ 35.000935] RSP: 002b:00000000007eff78 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 35.008838] RAX: ffffffffffffffda RBX: 00007ffc76ae18c0 RCX: 0000000000444759 [ 35.016106] RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000003 [ 35.023514] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 35.030783] R10: 000000000000000f R11: 0000000000000213 R12: 0000000000402310 [ 35.038048] R13: 00000000004023a0 R14: 0000000000000000 R15: 0000000000000000 [ 35.045681] Dumping ftrace buffer: [ 35.049339] (ftrace buffer empty) [ 35.053045] Kernel Offset: disabled [ 35.056773] Rebooting in 86400 seconds..