------------[ cut here ]------------ WARNING: CPU: 1 PID: 27109 at drivers/gpu/drm/vkms/vkms_gem.c:37 vkms_gem_free_object+0x85/0xa0 drivers/gpu/drm/vkms/vkms_gem.c:37 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 27109 Comm: syz-executor.2 Not tainted 5.9.0-rc3-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+0x198/0x1fd lib/dump_stack.c:118 panic+0x347/0x7c0 kernel/panic.c:231 __warn.cold+0x20/0x46 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 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+0x85/0xa0 drivers/gpu/drm/vkms/vkms_gem.c:37 Code: 00 75 2b e8 ed 1b 0d fd 48 8d bd 30 02 00 00 e8 81 10 f2 fc 48 89 ef e8 09 62 a5 ff 48 89 ef 5d e9 50 b8 4c fd e8 cb 1b 0d fd <0f> 0b eb a8 e8 c2 1b 0d fd 0f 0b eb cc e8 09 2e 4d fd eb bb e8 02 RSP: 0018:ffffc9000a8e7be0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffffff84672eb0 RCX: ffffffff840cb4a8 RDX: ffff88805291a180 RSI: ffffffff84672f35 RDI: ffff88804e1102c0 RBP: ffff88804e110000 R08: 0000000000000001 R09: ffff88804e110003 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a2354c28 R13: ffff88804e110008 R14: ffff88804e110128 R15: ffff8880538da800 drm_gem_object_free drivers/gpu/drm/drm_gem.c:990 [inline] kref_put include/linux/kref.h:65 [inline] __drm_gem_object_put include/drm/drm_gem.h:370 [inline] drm_gem_object_put include/drm/drm_gem.h:383 [inline] drm_gem_object_handle_put_unlocked+0x3ac/0x420 drivers/gpu/drm/drm_gem.c:238 drm_gem_object_release_handle+0xf9/0x1b0 drivers/gpu/drm/drm_gem.c:260 idr_for_each+0x113/0x220 lib/idr.c:208 drm_gem_release+0x22/0x30 drivers/gpu/drm/drm_gem.c:947 drm_file_free.part.0+0x866/0xcb0 drivers/gpu/drm/drm_file.c:282 drm_file_free drivers/gpu/drm/drm_file.c:251 [inline] drm_close_helper.isra.0+0x17d/0x1f0 drivers/gpu/drm/drm_file.c:309 drm_release+0x1e6/0x530 drivers/gpu/drm/drm_file.c:494 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:140 [inline] exit_to_user_mode_prepare+0x1e1/0x200 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:242 __do_fast_syscall_32+0x63/0x80 arch/x86/entry/common.c:127 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f51549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000090afbec EFLAGS: 00000212 ORIG_RAX: 0000000000000006 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000000 RDX: 0000000000000005 RSI: 0000000008b9c660 RDI: 000000000025e7db RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..