------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 4094 at lib/refcount.c:28 refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 4094 Comm: syz-executor.4 Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #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 : ffff800020b13b90
x29: ffff800020b13b90 x28: 00000000000a201d x27: 0000000000002000
x26: dead000000000100 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000001 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000003 x19: ffff80000d937000 x18: 0000000000000081
x17: ffff80000c04d6bc x16: ffff80000dbb8658 x15: ffff000102bbcf80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000102bbcf80
x11: ff808000081c39d0 x10: 0000000000000000 x9 : 41859ec8b30c7c00
x8 : 41859ec8b30c7c00 x7 : ffff800008163d08 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff000102bbcf80 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:225
 drm_gem_object_release_handle+0x68/0x80 drivers/gpu/drm/drm_gem.c:244
 idr_for_each+0xf0/0x174 lib/idr.c:208
 drm_gem_release+0x30/0x48 drivers/gpu/drm/drm_gem.c:917
 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: 1806
hardirqs last  enabled at (1805): [<ffff800008163d98>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (1805): [<ffff800008163d98>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942
hardirqs last disabled at (1806): [<ffff80000c000f0c>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395
softirqs last  enabled at (1762): [<ffff80000801c1f4>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1760): [<ffff80000801c1c0>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---