[info] Using makefile-style concurrent boot in runlevel 2. [ 26.002944] audit: type=1800 audit(1542180659.554:21): pid=5808 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 26.028790] audit: type=1800 audit(1542180659.554:22): pid=5808 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.53' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.740745] BUG: GPF in non-whitelisted uaccess (non-canonical address?) [ 38.747985] kasan: CONFIG_KASAN_INLINE enabled [ 38.752758] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.760120] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.766339] CPU: 0 PID: 5962 Comm: syz-executor203 Not tainted 4.20.0-rc2+ #111 [ 38.773768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.783131] RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 [ 38.789007] Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 [ 38.807901] RSP: 0018:ffff8881c0a57398 EFLAGS: 00010206 [ 38.813385] RAX: 0000000000000000 RBX: 0000000000000109 RCX: 0000000000000109 [ 38.820645] RDX: 0000000000000109 RSI: 241037f828e5769d RDI: ffff8881c07b06f8 [ 38.827993] RBP: ffff8881c0a573d0 R08: ffffed10380f6101 R09: ffffed10380f6101 [ 38.835250] R10: ffffed10380f6100 R11: ffff8881c07b0800 R12: 241037f828e577a6 [ 38.842501] R13: 241037f828e5769d R14: ffff8881c07b06f8 R15: ffffffffffffffff [ 38.850051] FS: 00000000009d3880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 38.858257] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.864121] CR2: 0000000020d83ff8 CR3: 00000001b37fe000 CR4: 00000000001406f0 [ 38.871576] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.878847] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.886116] Call Trace: [ 38.888791] ? _copy_from_user+0x10d/0x150 [ 38.893144] uhid_dev_create+0x20c/0xb40 [ 38.897193] ? uhid_dev_create2+0x7e0/0x7e0 [ 38.901515] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.907037] uhid_char_write+0xc74/0xef0 [ 38.911142] __vfs_write+0x119/0x9f0 [ 38.914907] ? uhid_hid_stop+0x90/0x90 [ 38.918784] ? kernel_read+0x120/0x120 [ 38.922657] ? save_stack+0x43/0xd0 [ 38.926411] ? kasan_kmalloc+0xc7/0xe0 [ 38.930285] ? __kmalloc+0x15b/0x760 [ 38.934102] ? splice_direct_to_actor+0x6fc/0x8f0 [ 38.939002] ? perf_trace_sched_process_exec+0x860/0x860 [ 38.944447] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.949979] __kernel_write+0x10c/0x370 [ 38.953943] write_pipe_buf+0x180/0x240 [ 38.957905] ? debug_mutex_init+0x2d/0x60 [ 38.962039] ? do_splice_direct+0x420/0x420 [ 38.966348] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.971869] ? splice_from_pipe_next.part.11+0x296/0x340 [ 38.977305] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.982827] __splice_from_pipe+0x38b/0x7c0 [ 38.987261] ? do_splice_direct+0x420/0x420 [ 38.991678] splice_from_pipe+0x1ec/0x340 [ 38.995819] ? do_splice_direct+0x420/0x420 [ 39.000124] ? splice_shrink_spd+0xd0/0xd0 [ 39.004346] default_file_splice_write+0x3c/0x90 [ 39.009084] ? generic_splice_sendpage+0x50/0x50 [ 39.013823] direct_splice_actor+0x128/0x190 [ 39.018218] splice_direct_to_actor+0x318/0x8f0 [ 39.022884] ? pipe_to_sendpage+0x400/0x400 [ 39.027187] ? do_splice_to+0x190/0x190 [ 39.031167] ? security_file_permission+0x1c2/0x220 [ 39.036189] ? rw_verify_area+0x118/0x360 [ 39.040334] do_splice_direct+0x2d4/0x420 [ 39.044599] ? splice_direct_to_actor+0x8f0/0x8f0 [ 39.049435] ? rw_verify_area+0x118/0x360 [ 39.053570] do_sendfile+0x62a/0xe20 [ 39.057347] ? do_compat_pwritev64+0x1c0/0x1c0 [ 39.062035] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 39.067556] ? _copy_from_user+0xdf/0x150 [ 39.071704] __x64_sys_sendfile64+0x15d/0x250 [ 39.076182] ? __ia32_sys_sendfile+0x2a0/0x2a0 [ 39.080777] do_syscall_64+0x1b9/0x820 [ 39.084651] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.090142] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.095065] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.099892] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.105067] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.110070] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.115597] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.120599] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.125429] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.130609] RIP: 0033:0x440309 [ 39.133788] 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 [ 39.152803] RSP: 002b:00007fff7d3d0028 EFLAGS: 00000203 ORIG_RAX: 0000000000000028 [ 39.160500] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309 [ 39.167772] RDX: 0000000020d83ff8 RSI: 0000000000000004 RDI: 0000000000000003 [ 39.175026] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 39.182415] R10: 00008000fffffffe R11: 0000000000000203 R12: 0000000000401b90 [ 39.189669] R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000 [ 39.196931] Modules linked in: [ 39.200600] ---[ end trace e9266989ab8be374 ]--- [ 39.205573] RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 [ 39.211528] Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 [ 39.230631] RSP: 0018:ffff8881c0a57398 EFLAGS: 00010206 [ 39.236012] RAX: 0000000000000000 RBX: 0000000000000109 RCX: 0000000000000109 [ 39.243384] RDX: 0000000000000109 RSI: 241037f828e5769d RDI: ffff8881c07b06f8 [ 39.250785] RBP: ffff8881c0a573d0 R08: ffffed10380f6101 R09: ffffed10380f6101 [ 39.258075] R10: ffffed10380f6100 R11: ffff8881c07b0800 R12: 241037f828e577a6 [ 39.265356] R13: 241037f828e5769d R14: ffff8881c07b06f8 R15: ffffffffffffffff [ 39.272802] FS: 00000000009d3880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 39.281030] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.286938] CR2: 0000000020d83ff8 CR3: 00000001b37fe000 CR4: 00000000001406f0 [ 39.294217] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.301607] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.309016] Kernel panic - not syncing: Fatal exception [ 39.315775] Kernel Offset: disabled [ 39.319399] Rebooting in 86400 seconds..