------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 9844 at lib/refcount.c:28 refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 9844 Comm: syz-executor.3 Not tainted 6.0.0-rc2-syzkaller-16455-ga41a877bc12d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
lr : refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
sp : ffff80003338bb90
x29: ffff80003338bb90 x28: 00000000000a201d x27: 0000000000002000
x26: dead000000000100 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000001 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000003 x19: ffff80000d937000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000dbb8658 x15: ffff0000c03d3500
x14: 0000000000000008 x13: 00000000ffffffff x12: ffff0000c03d3500
x11: ff808000081c39dc x10: 0000000000000000 x9 : b7b259014506e700
x8 : b7b259014506e700 x7 : ffff8000081c0d8c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0000c03d3500 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
 __refcount_sub_and_test include/linux/refcount.h:283 [inline]
 __refcount_dec_and_test include/linux/refcount.h:315 [inline]
 refcount_dec_and_test include/linux/refcount.h:333 [inline]
 kref_put include/linux/kref.h:64 [inline]
 __drm_gem_object_put include/drm/drm_gem.h:381 [inline]
 drm_gem_object_put include/drm/drm_gem.h:394 [inline]
 drm_gem_object_handle_put_unlocked+0x178/0x190 drivers/gpu/drm/drm_gem.c:240
 drm_gem_object_release_handle+0x90/0xa8 drivers/gpu/drm/drm_gem.c:259
 idr_for_each+0xf0/0x174 lib/idr.c:208
 drm_gem_release+0x30/0x48 drivers/gpu/drm/drm_gem.c:932
 drm_file_free+0x220/0x2cc drivers/gpu/drm/drm_file.c:281
 drm_close_helper drivers/gpu/drm/drm_file.c:308 [inline]
 drm_release+0x108/0x22c drivers/gpu/drm/drm_file.c:495
 __fput+0x198/0x3bc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x208 kernel/task_work.c:177
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x174/0x1d0 arch/arm64/kernel/signal.c:1127
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:625
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
 el0t_64_sync+0x18c/0x190
irq event stamp: 1760
hardirqs last  enabled at (1759): [<ffff8000081c0ea4>] console_trylock_spinning+0x238/0x2fc kernel/printk/printk.c:1904
hardirqs last disabled at (1760): [<ffff80000bffe9cc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last  enabled at (1734): [<ffff80000801c1f4>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1732): [<ffff80000801c1c0>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---