------------[ cut here ]------------ WARNING: CPU: 1 PID: 7572 at drivers/gpu/drm/vkms/vkms_gem.c:37 vkms_gem_free_object+0x77/0x90 drivers/gpu/drm/vkms/vkms_gem.c:43 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7572 Comm: syz-executor.1 Not tainted 5.4.0-rc1+ #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+0x113/0x167 lib/dump_stack.c:113 panic+0x223/0x4dc kernel/panic.c:220 __warn.cold.11+0x25/0x27 kernel/panic.c:581 report_bug+0x1b0/0x270 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:179 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028 RIP: 0010:vkms_gem_free_object+0x77/0x90 drivers/gpu/drm/vkms/vkms_gem.c:37 Code: 31 48 83 bb 88 02 00 00 00 75 23 48 8d bb f8 01 00 00 e8 fc 2a a5 fd 48 89 df e8 f4 a1 b5 ff 48 89 df e8 8c c5 ef fd 5b 5d c3 <0f> 0b eb b5 0f 0b eb d9 e8 9c 11 f0 fd eb c8 e8 95 11 f0 fd eb 99 RSP: 0018:ffff88808cee7b68 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: ffff8880852f2900 RCX: ffffffff8307b801 RDX: 1ffff11010a5e56f RSI: 0000000000000004 RDI: ffff8880852f2b78 RBP: ffff88808cee7b70 R08: 0000000000000004 R09: ffffed10119dcf65 R10: ffffed10119dcf65 R11: 0000000000000003 R12: ffffffff888a0220 R13: ffff888219364180 R14: ffff8882193641a0 R15: ffff88808cee7ce0 drm_gem_object_free+0xe2/0x1e0 drivers/gpu/drm/drm_gem.c:983 kref_put include/linux/kref.h:65 [inline] drm_gem_object_put_unlocked+0xf1/0x130 drivers/gpu/drm/drm_gem.c:1017 drm_gem_object_handle_put_unlocked+0x161/0x260 drivers/gpu/drm/drm_gem.c:239 drm_gem_object_release_handle+0xd5/0x190 drivers/gpu/drm/drm_gem.c:261 idr_for_each+0x10c/0x1f0 lib/idr.c:208 drm_gem_release+0x1b/0x30 drivers/gpu/drm/drm_gem.c:939 drm_file_free.part.9+0x846/0xbb0 drivers/gpu/drm/drm_file.c:244 drm_file_free drivers/gpu/drm/drm_file.c:213 [inline] drm_close_helper drivers/gpu/drm/drm_file.c:271 [inline] drm_release+0x25a/0x3d0 drivers/gpu/drm/drm_file.c:443 __fput+0x25a/0x770 fs/file_table.c:280 ____fput+0x9/0x10 fs/file_table.c:313 task_work_run+0x108/0x180 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x24e/0x2e0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x4e8/0x5d0 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413741 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:00007ffcb874a930 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000413741 RDX: 0000001b33120000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff R10: 00007ffcb874aa10 R11: 0000000000000293 R12: 000000000075bf20 R13: 000000000000d4e0 R14: 00000000007603f0 R15: 000000000075bf2c Kernel Offset: disabled Rebooting in 86400 seconds..