[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.68' (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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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: [ 38.743327] ------------[ cut here ]------------ [ 38.748310] WARNING: CPU: 0 PID: 9716 at drivers/gpu/drm/drm_prime.c:982 drm_prime_destroy_file_private.cold+0x11/0x18 [ 38.759124] Kernel panic - not syncing: panic_on_warn set ... [ 38.759124] [ 38.766473] CPU: 0 PID: 9716 Comm: syz-executor302 Not tainted 4.19.211-syzkaller #0 [ 38.774327] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.783661] Call Trace: [ 38.786235] dump_stack+0x1fc/0x2ef [ 38.789844] panic+0x26a/0x50e [ 38.793019] ? __warn_printk+0xf3/0xf3 [ 38.796891] ? drm_prime_destroy_file_private.cold+0x11/0x18 [ 38.802678] ? __probe_kernel_read+0x130/0x1b0 [ 38.807246] ? __warn.cold+0x5/0x5a [ 38.810861] ? __warn+0xe4/0x200 [ 38.814211] ? drm_prime_destroy_file_private.cold+0x11/0x18 [ 38.819992] __warn.cold+0x20/0x5a [ 38.823517] ? drm_prime_destroy_file_private.cold+0x11/0x18 [ 38.829294] report_bug+0x262/0x2b0 [ 38.832902] do_error_trap+0x1d7/0x310 [ 38.836774] ? math_error+0x310/0x310 [ 38.840555] ? __irq_work_queue_local+0x101/0x160 [ 38.845378] ? irq_work_queue+0x29/0x80 [ 38.849343] ? error_entry+0x72/0xd0 [ 38.853047] ? trace_hardirqs_off_caller+0x6e/0x210 [ 38.858043] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.862876] invalid_op+0x14/0x20 [ 38.866409] RIP: 0010:drm_prime_destroy_file_private.cold+0x11/0x18 [ 38.872801] Code: 64 f9 48 c7 c7 80 93 c5 88 e8 a7 81 f5 ff 0f 0b 41 83 cc ff e9 4e 97 da fb e8 2c 50 64 f9 48 c7 c7 80 93 c5 88 e8 8b 81 f5 ff <0f> 0b e9 7a a2 da fb e8 14 50 64 f9 48 c7 c7 60 95 c5 88 e8 73 81 [ 38.891690] RSP: 0018:ffff88809bdcf968 EFLAGS: 00010286 [ 38.897039] RAX: 0000000000000024 RBX: ffff8880aa605290 RCX: 0000000000000000 [ 38.904289] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10137b9f1f [ 38.911552] RBP: ffffffff83e99a40 R08: 0000000000000024 R09: 0000000000000000 [ 38.918801] R10: 0000000000000005 R11: 0000000000000000 R12: ffff888092b2cdc0 [ 38.926054] R13: ffff888092b2d000 R14: ffff888092b2d010 R15: ffff888092b2cfe8 [ 38.933319] ? vgem_gem_free_object+0xd0/0xd0 [ 38.937798] ? vprintk_func+0x81/0x180 [ 38.941673] ? drm_prime_destroy_file_private.cold+0x11/0x18 [ 38.947451] drm_file_free.part.0+0xa15/0xd30 [ 38.951936] drm_release+0x210/0x360 [ 38.955642] ? ima_file_free+0xb6/0x460 [ 38.959621] ? drm_lastclose+0x2b0/0x2b0 [ 38.963677] __fput+0x2ce/0x890 [ 38.966942] task_work_run+0x148/0x1c0 [ 38.970809] do_exit+0xbf3/0x2be0 [ 38.974242] ? futex_wake+0x159/0x480 [ 38.978021] ? mm_update_next_owner+0x650/0x650 [ 38.982669] ? get_signal+0x388/0x1f70 [ 38.986538] ? lock_downgrade+0x720/0x720 [ 38.990665] ? lock_acquire+0x170/0x3c0 [ 38.995739] do_group_exit+0x125/0x310 [ 38.999612] get_signal+0x3f2/0x1f70 [ 39.003315] do_signal+0x8f/0x1670 [ 39.006836] ? do_vfs_ioctl+0x110/0x12e0 [ 39.010886] ? setup_sigcontext+0x820/0x820 [ 39.015187] ? ioctl_preallocate+0x200/0x200 [ 39.019581] ? __fget+0x356/0x510 [ 39.023020] ? __se_sys_futex+0x28f/0x3b0 [ 39.027150] ? __se_sys_futex+0x298/0x3b0 [ 39.031280] ? do_futex+0x1880/0x1880 [ 39.035065] ? exit_to_usermode_loop+0x36/0x2a0 [ 39.039719] exit_to_usermode_loop+0x204/0x2a0 [ 39.044282] do_syscall_64+0x538/0x620 [ 39.048154] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.053341] RIP: 0033:0x7f37712ef129 [ 39.057036] Code: Bad RIP value. [ 39.060378] RSP: 002b:00007f377127b2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 39.068064] RAX: fffffffffffffe00 RBX: 00007f3771372430 RCX: 00007f37712ef129 [ 39.075314] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3771372438 [ 39.082629] RBP: 00007f377137243c R08: 0000000000000000 R09: 0000000000000000 [ 39.089893] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3771340074 [ 39.097141] R13: 6972642f7665642f R14: 65732f636f72702f R15: 00007f3771372438 [ 39.104735] Kernel Offset: disabled [ 39.108393] Rebooting in 86400 seconds..