------------[ cut here ]------------
WARNING: CPU: 0 PID: 5059 at drivers/gpu/drm/vkms/vkms_gem.c:37 vkms_gem_free_object+0x8d/0xa0 drivers/gpu/drm/vkms/vkms_gem.c:37
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 5059 Comm: syz-executor.5 Not tainted 5.9.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d6/0x29e lib/dump_stack.c:118
 panic+0x2c0/0x800 kernel/panic.c:231
 __warn+0x227/0x250 kernel/panic.c:600
 report_bug+0x1b1/0x2e0 lib/bug.c:198
 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:vkms_gem_free_object+0x8d/0xa0 drivers/gpu/drm/vkms/vkms_gem.c:37
Code: 19 db f1 fc 49 8d be 30 02 00 00 e8 6d 53 d6 fc 4c 89 f7 e8 95 bd 9d ff 4c 89 f7 5b 41 5e 41 5f e9 88 0e 31 fd e8 f3 da f1 fc <0f> 0b eb ae e8 ea da f1 fc 0f 0b eb cd 66 0f 1f 44 00 00 55 41 57
RSP: 0018:ffffc90016ac7c58 EFLAGS: 00010293
RAX: ffffffff8483229d RBX: ffff888092c142c0 RCX: ffff888090108480
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888092c14000
RBP: ffff8880849a0c28 R08: ffffffff8420c519 R09: ffffed1012582801
R10: ffffed1012582801 R11: 0000000000000000 R12: ffff88809254ab30
R13: dffffc0000000000 R14: ffff888092c14000 R15: dffffc0000000000
 drm_gem_object_release_handle+0x150/0x160 drivers/gpu/drm/drm_gem.c:260
 idr_for_each+0x16b/0x260 lib/idr.c:208
 drm_gem_release+0x21/0x30 drivers/gpu/drm/drm_gem.c:947
 drm_file_free+0x7a3/0xa70 drivers/gpu/drm/drm_file.c:282
 drm_close_helper drivers/gpu/drm/drm_file.c:309 [inline]
 drm_release+0x33e/0x5c0 drivers/gpu/drm/drm_file.c:494
 __fput+0x34f/0x7b0 fs/file_table.c:281
 task_work_run+0x137/0x1c0 kernel/task_work.c:141
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:163 [inline]
 exit_to_user_mode_prepare+0x11a/0x1e0 kernel/entry/common.c:190
 syscall_exit_to_user_mode+0x82/0x1d0 kernel/entry/common.c:265
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x416f01
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fffa964fe20 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000416f01
RDX: 0000000000000000 RSI: 0000000000001b9a RDI: 0000000000000005
RBP: 0000000000000001 R08: 00000000faa67b9a R09: 00000000faa67b9e
R10: 00007fffa964ff10 R11: 0000000000000293 R12: 0000000001190fe8
R13: 00000000000bfb2f R14: ffffffffffffffff R15: 000000000118cf4c
Kernel Offset: disabled
Rebooting in 86400 seconds..