Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.116' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 36.944324] kasan: CONFIG_KASAN_INLINE enabled [ 36.949957] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.970686] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.976981] CPU: 0 PID: 8153 Comm: syz-executor925 Not tainted 4.19.194-syzkaller #0 [ 36.984900] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program executing program executing program executing program executing program [ 36.994283] RIP: 0010:vgem_fence_attach_ioctl+0x27d/0x640 [ 36.999842] Code: 03 80 3c 02 00 0f 85 9b 03 00 00 4c 8b b5 10 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d be e0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7f 03 00 00 4c 89 ea 4d 8b b6 e0 00 00 00 48 b8 [ 37.018933] RSP: 0018:ffff88809cb47af0 EFLAGS: 00010202 [ 37.024400] RAX: dffffc0000000000 RBX: ffff88809ce32000 RCX: 1ffff11013968f4b [ 37.032394] RDX: 000000000000001c RSI: ffffffff8153be2f RDI: 00000000000000e0 executing program executing program [ 37.039855] RBP: ffff8880ab9bd500 R08: 0000000000000000 R09: 0000000000000000 [ 37.047142] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a4f73140 [ 37.054699] R13: ffff88809ce32004 R14: 0000000000000000 R15: ffff8880a4f731d8 [ 37.062048] FS: 00007f013649e700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 37.070273] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.076159] CR2: 00007ffe205369c0 CR3: 00000000981b7000 CR4: 00000000001406f0 [ 37.083821] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 executing program executing program [ 37.091437] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.099163] Call Trace: [ 37.101974] drm_ioctl_kernel+0x208/0x2a0 [ 37.106467] ? __vgem_fence_idr_fini+0x60/0x60 [ 37.111176] ? drm_ioctl_permit+0x210/0x210 [ 37.116905] ? __might_fault+0x192/0x1d0 [ 37.121421] drm_ioctl+0x507/0x9c0 [ 37.125020] ? __vgem_fence_idr_fini+0x60/0x60 [ 37.129627] ? drm_getstats+0x20/0x20 [ 37.133443] ? debug_check_no_obj_freed+0x201/0x490 [ 37.138513] ? futex_exit_release+0x220/0x220 executing program executing program executing program [ 37.143178] ? lock_acquire+0x170/0x3c0 [ 37.147206] ? debug_check_no_obj_freed+0xb5/0x490 [ 37.152133] ? drm_getstats+0x20/0x20 [ 37.156118] do_vfs_ioctl+0xcdb/0x12e0 [ 37.160012] ? lock_downgrade+0x720/0x720 [ 37.164173] ? check_preemption_disabled+0x41/0x280 [ 37.169206] ? ioctl_preallocate+0x200/0x200 [ 37.173629] ? __fget+0x356/0x510 [ 37.177279] ? do_dup2+0x450/0x450 [ 37.180970] ? __se_sys_futex+0x298/0x3b0 [ 37.185476] ksys_ioctl+0x9b/0xc0 [ 37.188936] __x64_sys_ioctl+0x6f/0xb0 executing program executing program [ 37.192854] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 37.197478] do_syscall_64+0xf9/0x620 [ 37.201293] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.206611] RIP: 0033:0x449f49 [ 37.209822] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 37.228723] RSP: 002b:00007f013649e308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 37.236485] RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000449f49 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.243863] RDX: 0000000020000140 RSI: 00000000c10c5541 RDI: 0000000000000004 [ 37.251282] RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000 [ 37.258572] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ca42c [ 37.265858] R13: 000000000049a074 R14: 6972642f7665642f R15: 0000000000022000 [ 37.273450] Modules linked in: [ 37.287415] ---[ end trace dc17a1d7cfa2085f ]--- executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.302022] RIP: 0010:vgem_fence_attach_ioctl+0x27d/0x640 [ 37.320146] Code: 03 80 3c 02 00 0f 85 9b 03 00 00 4c 8b b5 10 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d be e0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7f 03 00 00 4c 89 ea 4d 8b b6 e0 00 00 00 48 b8 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.351266] RSP: 0018:ffff88809cb47af0 EFLAGS: 00010202 [ 37.359115] RAX: dffffc0000000000 RBX: ffff88809ce32000 RCX: 1ffff11013968f4b [ 37.372507] RDX: 000000000000001c RSI: ffffffff8153be2f RDI: 00000000000000e0 [ 37.383076] RBP: ffff8880ab9bd500 R08: 0000000000000000 R09: 0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.398524] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a4f73140 [ 37.409820] R13: ffff88809ce32004 R14: 0000000000000000 R15: ffff8880a4f731d8 [ 37.421580] FS: 00007f013649e700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 37.437607] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 executing program executing program executing program executing program executing program executing program executing program [ 37.450761] CR2: 00007ffe205369c0 CR3: 00000000981b7000 CR4: 00000000001406f0 [ 37.463757] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.472396] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.484557] Kernel panic - not syncing: Fatal exception [ 37.490694] Kernel Offset: disabled [ 37.494509] Rebooting in 86400 seconds..