------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 8180 at lib/refcount.c:28 refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 8180 Comm: syz-executor.0 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
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 : ffff8000135aba60
x29: ffff8000135aba60 x28: 00000000000a201d x27: 0000000000002000
x26: dead000000000100 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000001 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000003 x19: ffff80000d8c8000 x18: 00000000000000ec
x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff000112d83500
x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000
x11: 000000000003ffff x10: ffff800012a85000 x9 : 9bc9db2117d2c700
x8 : 9bc9db2117d2c700 x7 : ffff80000819545c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 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+0x178/0x1a0 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+0x108/0x240 drivers/gpu/drm/drm_file.c:495
 __fput+0x198/0x3dc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x14c kernel/task_work.c:177
 get_signal+0xac8/0xb40 kernel/signal.c:2634
 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071
 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124
 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:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 969580
hardirqs last  enabled at (969579): [<ffff8000081befc8>] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:264
hardirqs last disabled at (969580): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (968302): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (968287): [<ffff800008017c14>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
---[ end trace 0000000000000000 ]---