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Tue, 22 Jul 2025 16:05:22 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface MIME-Version: 1.0 X-ThreadId: T77a992bd37273535 Date: Tue, 22 Jul 2025 13:05:02 -0700 From: James To: phasta@kernel.org, matthew.brost@intel.com, dakr@kernel.org, =?UTF-8?Q?Christian_K=C3=B6nig?= , maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, "Shuah Khan" Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linux.dev, "Tvrtko Ursulin" Message-Id: In-Reply-To: References: <20250720235748.2798-1-bold.zone2373@fastmail.com> <66a14b005fa3dc874f4f3261b93901af1292bde9.camel@mailbox.org> Subject: Re: [PATCH] drm/sched: Prevent stopped entities from being added to the run queue. Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Mon, Jul 21, 2025, at 1:16 AM, Philipp Stanner wrote: > On Mon, 2025-07-21 at 09:52 +0200, Philipp Stanner wrote: >> +Cc Tvrtko, who's currently reworking FIFO and RR. >>=20 >> On Sun, 2025-07-20 at 16:56 -0700, James Flowers wrote: >> > Fixes an issue where entities are added to the run queue in >> > drm_sched_rq_update_fifo_locked after being killed, causing a >> > slab-use-after-free error. >> >=20 >> > Signed-off-by: James Flowers >> > --- >> > This issue was detected by syzkaller running on a Steam Deck OLED. >> > Unfortunately I don't have a reproducer for it. I've >>=20 >> Well, now that's kind of an issue =E2=80=93 if you don't have a repro= ducer, how >> can you know that your patch is correct? How can we? >>=20 >> It would certainly be good to know what the fuzz testing framework >> does. >>=20 >> > included the KASAN reports below: >>=20 >>=20 >> Anyways, KASAN reports look interesting. But those might be many >> different issues. Again, would be good to know what the fuzzer has be= en >> testing. Can you maybe split this fuzz test into sub-tests? I suspsect >> those might be different faults. >>=20 >>=20 >> Anyways, taking a first look=E2=80=A6 >>=20 >>=20 >> >=20 >> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> > BUG: KASAN: slab-use-after-free in rb_next+0xda/0x160 lib/rbtree.c:= 505 >> > Read of size 8 at addr ffff8881805085e0 by task kworker/u32:12/192 >> > CPU: 3 UID: 0 PID: 192 Comm: kworker/u32:12 Not tainted 6.14.0-flow= ejam-+ #1 >> > Hardware name: Valve Galileo/Galileo, BIOS F7G0112 08/01/2024 >> > Workqueue: sdma0 drm_sched_run_job_work [gpu_sched] >> > Call Trace: >> > =C2=A0 >> > =C2=A0__dump_stack lib/dump_stack.c:94 [inline] >> > =C2=A0dump_stack_lvl+0xd2/0x130 lib/dump_stack.c:120 >> > =C2=A0print_address_description.constprop.0+0x88/0x380 mm/kasan/rep= ort.c:408 >> > =C2=A0print_report+0xfc/0x1ff mm/kasan/report.c:521 >> > =C2=A0kasan_report+0xdd/0x1b0 mm/kasan/report.c:634 >> > =C2=A0rb_next+0xda/0x160 lib/rbtree.c:505 >> > =C2=A0drm_sched_rq_select_entity_fifo drivers/gpu/drm/scheduler/sch= ed_main.c:332 [inline] [gpu_sched] >> > =C2=A0drm_sched_select_entity+0x497/0x720 drivers/gpu/drm/scheduler= /sched_main.c:1081 [gpu_sched] >> > =C2=A0drm_sched_run_job_work+0x2e/0x710 drivers/gpu/drm/scheduler/s= ched_main.c:1206 [gpu_sched] >> > =C2=A0process_one_work+0x9c0/0x17e0 kernel/workqueue.c:3238 >> > =C2=A0process_scheduled_works kernel/workqueue.c:3319 [inline] >> > =C2=A0worker_thread+0x734/0x1060 kernel/workqueue.c:3400 >> > =C2=A0kthread+0x3fd/0x810 kernel/kthread.c:464 >> > =C2=A0ret_from_fork+0x53/0x80 arch/x86/kernel/process.c:148 >> > =C2=A0ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 >> > =C2=A0 >> > Allocated by task 73472: >> > =C2=A0kasan_save_stack+0x30/0x50 mm/kasan/common.c:47 >> > =C2=A0kasan_save_track+0x14/0x30 mm/kasan/common.c:68 >> > =C2=A0poison_kmalloc_redzone mm/kasan/common.c:377 [inline] >> > =C2=A0__kasan_kmalloc+0x9a/0xb0 mm/kasan/common.c:394 >> > =C2=A0kmalloc_noprof include/linux/slab.h:901 [inline] [amdgpu] >> > =C2=A0kzalloc_noprof include/linux/slab.h:1037 [inline] [amdgpu] >> > =C2=A0amdgpu_driver_open_kms+0x151/0x660 drivers/gpu/drm/amd/amdgpu= /amdgpu_kms.c:1402 [amdgpu] >> > =C2=A0drm_file_alloc+0x5d0/0xa00 drivers/gpu/drm/drm_file.c:171 >> > =C2=A0drm_open_helper+0x1fe/0x540 drivers/gpu/drm/drm_file.c:323 >> > =C2=A0drm_open+0x1a7/0x400 drivers/gpu/drm/drm_file.c:376 >> > =C2=A0drm_stub_open+0x21a/0x390 drivers/gpu/drm/drm_drv.c:1149 >> > =C2=A0chrdev_open+0x23b/0x6b0 fs/char_dev.c:414 >> > =C2=A0do_dentry_open+0x743/0x1bf0 fs/open.c:956 >> > =C2=A0vfs_open+0x87/0x3f0 fs/open.c:1086 >> > =C2=A0do_open+0x72f/0xf80 fs/namei.c:3830 >> > =C2=A0path_openat+0x2ec/0x770 fs/namei.c:3989 >> > =C2=A0do_filp_open+0x1ff/0x420 fs/namei.c:4016 >> > =C2=A0do_sys_openat2+0x181/0x1e0 fs/open.c:1428 >> > =C2=A0do_sys_open fs/open.c:1443 [inline] >> > =C2=A0__do_sys_openat fs/open.c:1459 [inline] >> > =C2=A0__se_sys_openat fs/open.c:1454 [inline] >> > =C2=A0__x64_sys_openat+0x149/0x210 fs/open.c:1454 >> > =C2=A0do_syscall_x64 arch/x86/entry/common.c:52 [inline] >> > =C2=A0do_syscall_64+0x92/0x180 arch/x86/entry/common.c:83 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > Freed by task 73472: >> > =C2=A0kasan_save_stack+0x30/0x50 mm/kasan/common.c:47 >> > =C2=A0kasan_save_track+0x14/0x30 mm/kasan/common.c:68 >> > =C2=A0kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:576 >> > =C2=A0poison_slab_object mm/kasan/common.c:247 [inline] >> > =C2=A0__kasan_slab_free+0x52/0x70 mm/kasan/common.c:264 >> > =C2=A0kasan_slab_free include/linux/kasan.h:233 [inline] >> > =C2=A0slab_free_hook mm/slub.c:2353 [inline] >> > =C2=A0slab_free mm/slub.c:4609 [inline] >> > =C2=A0kfree+0x14f/0x4d0 mm/slub.c:4757 >> > =C2=A0amdgpu_driver_postclose_kms+0x43d/0x6b0 drivers/gpu/drm/amd/a= mdgpu/amdgpu_kms.c:1538 [amdgpu] >> > =C2=A0drm_file_free.part.0+0x72d/0xbc0 drivers/gpu/drm/drm_file.c:2= 55 >> > =C2=A0drm_file_free drivers/gpu/drm/drm_file.c:228 [inline] >> > =C2=A0drm_close_helper.isra.0+0x197/0x230 drivers/gpu/drm/drm_file.= c:278 >> > =C2=A0drm_release+0x1b0/0x3d0 drivers/gpu/drm/drm_file.c:426 >> > =C2=A0__fput+0x402/0xb50 fs/file_table.c:464 >> > =C2=A0task_work_run+0x155/0x250 kernel/task_work.c:227 >> > =C2=A0get_signal+0x1be/0x19d0 kernel/signal.c:2809 >> > =C2=A0arch_do_signal_or_restart+0x96/0x3a0 arch/x86/kernel/signal.c= :337 >> > =C2=A0exit_to_user_mode_loop kernel/entry/common.c:111 [inline] >> > =C2=A0exit_to_user_mode_prepare include/linux/entry-common.h:329 [i= nline] >> > =C2=A0__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [i= nline] >> > =C2=A0syscall_exit_to_user_mode+0x1fc/0x290 kernel/entry/common.c:2= 18 >> > =C2=A0do_syscall_64+0x9f/0x180 arch/x86/entry/common.c:89 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > The buggy address belongs to the object at ffff888180508000 >> > The buggy address is located 1504 bytes inside of >> > The buggy address belongs to the physical page: >> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:= 0x180508 >> > head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincou= nt:0 >> > flags: 0x17ffffc0000040(head|node=3D0|zone=3D2|lastcpupid=3D0x1ffff= f) >> > page_type: f5(slab) >> > raw: 0017ffffc0000040 ffff888100043180 dead000000000100 dead0000000= 00122 >> > raw: 0000000000000000 0000000080020002 00000000f5000000 00000000000= 00000 >> > head: 0017ffffc0000040 ffff888100043180 dead000000000100 dead000000= 000122 >> > head: 0000000000000000 0000000080020002 00000000f5000000 0000000000= 000000 >> > head: 0017ffffc0000003 ffffea0006014201 ffffffffffffffff 0000000000= 000000 >> > head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000= 000000 >> > page dumped because: kasan: bad access detected >> > Memory state around the buggy address: >> > =C2=A0ffff888180508480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =C2=A0ffff888180508500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > > ffff888180508580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >> > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ^ >> > =C2=A0ffff888180508600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =C2=A0ffff888180508680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> > BUG: KASAN: slab-use-after-free in rb_set_parent_color include/linu= x/rbtree_augmented.h:191 [inline] >> > BUG: KASAN: slab-use-after-free in __rb_erase_augmented include/lin= ux/rbtree_augmented.h:312 [inline] >> > BUG: KASAN: slab-use-after-free in rb_erase+0x157c/0x1b10 lib/rbtre= e.c:443 >> > Write of size 8 at addr ffff88816414c5d0 by task syz.2.3004/12376 >> > CPU: 7 UID: 65534 PID: 12376 Comm: syz.2.3004 Not tainted 6.14.0-fl= owejam-+ #1 >> > Hardware name: Valve Galileo/Galileo, BIOS F7G0112 08/01/2024 >> > Call Trace: >> > =C2=A0 >> > =C2=A0__dump_stack lib/dump_stack.c:94 [inline] >> > =C2=A0dump_stack_lvl+0xd2/0x130 lib/dump_stack.c:120 >> > =C2=A0print_address_description.constprop.0+0x88/0x380 mm/kasan/rep= ort.c:408 >> > =C2=A0print_report+0xfc/0x1ff mm/kasan/report.c:521 >> > =C2=A0kasan_report+0xdd/0x1b0 mm/kasan/report.c:634 >> > =C2=A0rb_set_parent_color include/linux/rbtree_augmented.h:191 [inl= ine] >> > =C2=A0__rb_erase_augmented include/linux/rbtree_augmented.h:312 [in= line] >> > =C2=A0rb_erase+0x157c/0x1b10 lib/rbtree.c:443 >> > =C2=A0rb_erase_cached include/linux/rbtree.h:126 [inline] [gpu_sche= d] >> > =C2=A0drm_sched_rq_remove_fifo_locked drivers/gpu/drm/scheduler/sch= ed_main.c:154 [inline] [gpu_sched] >> > =C2=A0drm_sched_rq_remove_entity+0x2d3/0x480 drivers/gpu/drm/schedu= ler/sched_main.c:243 [gpu_sched] >> > =C2=A0drm_sched_entity_kill.part.0+0x82/0x5e0 drivers/gpu/drm/sched= uler/sched_entity.c:237 [gpu_sched] >> > =C2=A0drm_sched_entity_kill drivers/gpu/drm/scheduler/sched_entity.= c:232 [inline] [gpu_sched] >> > =C2=A0drm_sched_entity_fini+0x4c/0x290 drivers/gpu/drm/scheduler/sc= hed_entity.c:331 [gpu_sched] >> > =C2=A0amdgpu_vm_fini_entities drivers/gpu/drm/amd/amdgpu/amdgpu_vm.= c:529 [inline] [amdgpu] >> > =C2=A0amdgpu_vm_fini+0x862/0x1180 drivers/gpu/drm/amd/amdgpu/amdgpu= _vm.c:2752 [amdgpu] >> > =C2=A0amdgpu_driver_postclose_kms+0x3db/0x6b0 drivers/gpu/drm/amd/a= mdgpu/amdgpu_kms.c:1526 [amdgpu] >> > =C2=A0drm_file_free.part.0+0x72d/0xbc0 drivers/gpu/drm/drm_file.c:2= 55 >> > =C2=A0drm_file_free drivers/gpu/drm/drm_file.c:228 [inline] >> > =C2=A0drm_close_helper.isra.0+0x197/0x230 drivers/gpu/drm/drm_file.= c:278 >> > =C2=A0drm_release+0x1b0/0x3d0 drivers/gpu/drm/drm_file.c:426 >> > =C2=A0__fput+0x402/0xb50 fs/file_table.c:464 >> > =C2=A0task_work_run+0x155/0x250 kernel/task_work.c:227 >> > =C2=A0exit_task_work include/linux/task_work.h:40 [inline] >> > =C2=A0do_exit+0x841/0xf60 kernel/exit.c:938 >> > =C2=A0do_group_exit+0xda/0x2b0 kernel/exit.c:1087 >> > =C2=A0get_signal+0x171f/0x19d0 kernel/signal.c:3036 >> > =C2=A0arch_do_signal_or_restart+0x96/0x3a0 arch/x86/kernel/signal.c= :337 >> > =C2=A0exit_to_user_mode_loop kernel/entry/common.c:111 [inline] >> > =C2=A0exit_to_user_mode_prepare include/linux/entry-common.h:329 [i= nline] >> > =C2=A0__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [i= nline] >> > =C2=A0syscall_exit_to_user_mode+0x1fc/0x290 kernel/entry/common.c:2= 18 >> > =C2=A0do_syscall_64+0x9f/0x180 arch/x86/entry/common.c:89 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > RIP: 0033:0x7f2d90da36ed >> > Code: Unable to access opcode bytes at 0x7f2d90da36c3. >> > RSP: 002b:00007f2d91b710d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000= 0ca >> > RAX: 0000000000000000 RBX: 00007f2d90fe6088 RCX: 00007f2d90da36ed >> > RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2d90fe6088 >> > RBP: 00007f2d90fe6080 R08: 0000000000000000 R09: 0000000000000000 >> > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d90fe608c >> > R13: 0000000000000000 R14: 0000000000000002 R15: 00007ffc34a67bd0 >> > =C2=A0 >> > Allocated by task 12381: >> > =C2=A0kasan_save_stack+0x30/0x50 mm/kasan/common.c:47 >> > =C2=A0kasan_save_track+0x14/0x30 mm/kasan/common.c:68 >> > =C2=A0poison_kmalloc_redzone mm/kasan/common.c:377 [inline] >> > =C2=A0__kasan_kmalloc+0x9a/0xb0 mm/kasan/common.c:394 >> > =C2=A0kmalloc_noprof include/linux/slab.h:901 [inline] [amdgpu] >> > =C2=A0kzalloc_noprof include/linux/slab.h:1037 [inline] [amdgpu] >> > =C2=A0amdgpu_driver_open_kms+0x151/0x660 drivers/gpu/drm/amd/amdgpu= /amdgpu_kms.c:1402 [amdgpu] >> > =C2=A0drm_file_alloc+0x5d0/0xa00 drivers/gpu/drm/drm_file.c:171 >> > =C2=A0drm_open_helper+0x1fe/0x540 drivers/gpu/drm/drm_file.c:323 >> > =C2=A0drm_open+0x1a7/0x400 drivers/gpu/drm/drm_file.c:376 >> > =C2=A0drm_stub_open+0x21a/0x390 drivers/gpu/drm/drm_drv.c:1149 >> > =C2=A0chrdev_open+0x23b/0x6b0 fs/char_dev.c:414 >> > =C2=A0do_dentry_open+0x743/0x1bf0 fs/open.c:956 >> > =C2=A0vfs_open+0x87/0x3f0 fs/open.c:1086 >> > =C2=A0do_open+0x72f/0xf80 fs/namei.c:3830 >> > =C2=A0path_openat+0x2ec/0x770 fs/namei.c:3989 >> > =C2=A0do_filp_open+0x1ff/0x420 fs/namei.c:4016 >> > =C2=A0do_sys_openat2+0x181/0x1e0 fs/open.c:1428 >> > =C2=A0do_sys_open fs/open.c:1443 [inline] >> > =C2=A0__do_sys_openat fs/open.c:1459 [inline] >> > =C2=A0__se_sys_openat fs/open.c:1454 [inline] >> > =C2=A0__x64_sys_openat+0x149/0x210 fs/open.c:1454 >> > =C2=A0do_syscall_x64 arch/x86/entry/common.c:52 [inline] >> > =C2=A0do_syscall_64+0x92/0x180 arch/x86/entry/common.c:83 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > Freed by task 12381: >> > =C2=A0kasan_save_stack+0x30/0x50 mm/kasan/common.c:47 >> > =C2=A0kasan_save_track+0x14/0x30 mm/kasan/common.c:68 >> > =C2=A0kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:576 >> > =C2=A0poison_slab_object mm/kasan/common.c:247 [inline] >> > =C2=A0__kasan_slab_free+0x52/0x70 mm/kasan/common.c:264 >> > =C2=A0kasan_slab_free include/linux/kasan.h:233 [inline] >> > =C2=A0slab_free_hook mm/slub.c:2353 [inline] >> > =C2=A0slab_free mm/slub.c:4609 [inline] >> > =C2=A0kfree+0x14f/0x4d0 mm/slub.c:4757 >> > =C2=A0amdgpu_driver_postclose_kms+0x43d/0x6b0 drivers/gpu/drm/amd/a= mdgpu/amdgpu_kms.c:1538 [amdgpu] >> > =C2=A0drm_file_free.part.0+0x72d/0xbc0 drivers/gpu/drm/drm_file.c:2= 55 >> > =C2=A0drm_file_free drivers/gpu/drm/drm_file.c:228 [inline] >> > =C2=A0drm_close_helper.isra.0+0x197/0x230 drivers/gpu/drm/drm_file.= c:278 >> > =C2=A0drm_release+0x1b0/0x3d0 drivers/gpu/drm/drm_file.c:426 >> > =C2=A0__fput+0x402/0xb50 fs/file_table.c:464 >> > =C2=A0task_work_run+0x155/0x250 kernel/task_work.c:227 >> > =C2=A0get_signal+0x1be/0x19d0 kernel/signal.c:2809 >> > =C2=A0arch_do_signal_or_restart+0x96/0x3a0 arch/x86/kernel/signal.c= :337 >> > =C2=A0exit_to_user_mode_loop kernel/entry/common.c:111 [inline] >> > =C2=A0exit_to_user_mode_prepare include/linux/entry-common.h:329 [i= nline] >> > =C2=A0__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [i= nline] >> > =C2=A0syscall_exit_to_user_mode+0x1fc/0x290 kernel/entry/common.c:2= 18 >> > =C2=A0do_syscall_64+0x9f/0x180 arch/x86/entry/common.c:89 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > The buggy address belongs to the object at ffff88816414c000 >> > The buggy address is located 1488 bytes inside of >> > The buggy address belongs to the physical page: >> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:= 0x164148 >> > head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincou= nt:0 >> > flags: 0x17ffffc0000040(head|node=3D0|zone=3D2|lastcpupid=3D0x1ffff= f) >> > page_type: f5(slab) >> > raw: 0017ffffc0000040 ffff88810005c8c0 dead000000000122 00000000000= 00000 >> > raw: 0000000000000000 0000000080020002 00000000f5000000 00000000000= 00000 >> > head: 0017ffffc0000040 ffff88810005c8c0 dead000000000122 0000000000= 000000 >> > head: 0000000000000000 0000000080020002 00000000f5000000 0000000000= 000000 >> > head: 0017ffffc0000003 ffffea0005905201 ffffffffffffffff 0000000000= 000000 >> > head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000= 000000 >> > page dumped because: kasan: bad access detected >> > Memory state around the buggy address: >> > =C2=A0ffff88816414c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =C2=A0ffff88816414c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > > ffff88816414c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >> > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 ^ >> > =C2=A0ffff88816414c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =C2=A0ffff88816414c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> > BUG: KASAN: slab-use-after-free in __rb_erase_augmented include/lin= ux/rbtree_augmented.h:259 [inline] >> > BUG: KASAN: slab-use-after-free in rb_erase+0xf5d/0x1b10 lib/rbtree= .c:443 >> > Read of size 8 at addr ffff88812ebcc5e0 by task syz.1.814/6553 >> > CPU: 0 UID: 65534 PID: 6553 Comm: syz.1.814 Not tainted 6.14.0-flow= ejam-+ #1 >> > Hardware name: Valve Galileo/Galileo, BIOS F7G0112 08/01/2024 >> > Call Trace: >> > =C2=A0 >> > =C2=A0__dump_stack lib/dump_stack.c:94 [inline] >> > =C2=A0dump_stack_lvl+0xd2/0x130 lib/dump_stack.c:120 >> > =C2=A0print_address_description.constprop.0+0x88/0x380 mm/kasan/rep= ort.c:408 >> > =C2=A0print_report+0xfc/0x1ff mm/kasan/report.c:521 >> > =C2=A0kasan_report+0xdd/0x1b0 mm/kasan/report.c:634 >> > =C2=A0__rb_erase_augmented include/linux/rbtree_augmented.h:259 [in= line] >> > =C2=A0rb_erase+0xf5d/0x1b10 lib/rbtree.c:443 >> > =C2=A0rb_erase_cached include/linux/rbtree.h:126 [inline] [gpu_sche= d] >> > =C2=A0drm_sched_rq_remove_fifo_locked drivers/gpu/drm/scheduler/sch= ed_main.c:154 [inline] [gpu_sched] >> > =C2=A0drm_sched_rq_remove_entity+0x2d3/0x480 drivers/gpu/drm/schedu= ler/sched_main.c:243 [gpu_sched] >> > =C2=A0drm_sched_entity_kill.part.0+0x82/0x5e0 drivers/gpu/drm/sched= uler/sched_entity.c:237 [gpu_sched] >> > =C2=A0drm_sched_entity_kill drivers/gpu/drm/scheduler/sched_entity.= c:232 [inline] [gpu_sched] >> > =C2=A0drm_sched_entity_fini+0x4c/0x290 drivers/gpu/drm/scheduler/sc= hed_entity.c:331 [gpu_sched] >> > =C2=A0amdgpu_vm_fini_entities drivers/gpu/drm/amd/amdgpu/amdgpu_vm.= c:529 [inline] [amdgpu] >> > =C2=A0amdgpu_vm_fini+0x862/0x1180 drivers/gpu/drm/amd/amdgpu/amdgpu= _vm.c:2752 [amdgpu] >> > =C2=A0amdgpu_driver_postclose_kms+0x3db/0x6b0 drivers/gpu/drm/amd/a= mdgpu/amdgpu_kms.c:1526 [amdgpu] >> > =C2=A0drm_file_free.part.0+0x72d/0xbc0 drivers/gpu/drm/drm_file.c:2= 55 >> > =C2=A0drm_file_free drivers/gpu/drm/drm_file.c:228 [inline] >> > =C2=A0drm_close_helper.isra.0+0x197/0x230 drivers/gpu/drm/drm_file.= c:278 >> > =C2=A0drm_release+0x1b0/0x3d0 drivers/gpu/drm/drm_file.c:426 >> > =C2=A0__fput+0x402/0xb50 fs/file_table.c:464 >> > =C2=A0task_work_run+0x155/0x250 kernel/task_work.c:227 >> > =C2=A0resume_user_mode_work include/linux/resume_user_mode.h:50 [in= line] >> > =C2=A0exit_to_user_mode_loop kernel/entry/common.c:114 [inline] >> > =C2=A0exit_to_user_mode_prepare include/linux/entry-common.h:329 [i= nline] >> > =C2=A0__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [i= nline] >> > =C2=A0syscall_exit_to_user_mode+0x26b/0x290 kernel/entry/common.c:2= 18 >> > =C2=A0do_syscall_64+0x9f/0x180 arch/x86/entry/common.c:89 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > RIP: 0033:0x7fd23eba36ed >> > Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 4= 8 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d= 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 >> > RSP: 002b:00007ffc2943a358 EFLAGS: 00000246 ORIG_RAX: 0000000000000= 1b4 >> > RAX: 0000000000000000 RBX: 00007ffc2943a428 RCX: 00007fd23eba36ed >> > RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 >> > RBP: 00007fd23ede7ba0 R08: 0000000000000001 R09: 0000000c00000000 >> > R10: 00007fd23ea00000 R11: 0000000000000246 R12: 00007fd23ede5fac >> > R13: 00007fd23ede5fa0 R14: 0000000000059ad1 R15: 0000000000059a8e >> > =C2=A0 >> > Allocated by task 6559: >> > =C2=A0kasan_save_stack+0x30/0x50 mm/kasan/common.c:47 >> > =C2=A0kasan_save_track+0x14/0x30 mm/kasan/common.c:68 >> > =C2=A0poison_kmalloc_redzone mm/kasan/common.c:377 [inline] >> > =C2=A0__kasan_kmalloc+0x9a/0xb0 mm/kasan/common.c:394 >> > =C2=A0kmalloc_noprof include/linux/slab.h:901 [inline] [amdgpu] >> > =C2=A0kzalloc_noprof include/linux/slab.h:1037 [inline] [amdgpu] >> > =C2=A0amdgpu_driver_open_kms+0x151/0x660 drivers/gpu/drm/amd/amdgpu= /amdgpu_kms.c:1402 [amdgpu] >> > =C2=A0drm_file_alloc+0x5d0/0xa00 drivers/gpu/drm/drm_file.c:171 >> > =C2=A0drm_open_helper+0x1fe/0x540 drivers/gpu/drm/drm_file.c:323 >> > =C2=A0drm_open+0x1a7/0x400 drivers/gpu/drm/drm_file.c:376 >> > =C2=A0drm_stub_open+0x21a/0x390 drivers/gpu/drm/drm_drv.c:1149 >> > =C2=A0chrdev_open+0x23b/0x6b0 fs/char_dev.c:414 >> > =C2=A0do_dentry_open+0x743/0x1bf0 fs/open.c:956 >> > =C2=A0vfs_open+0x87/0x3f0 fs/open.c:1086 >> > =C2=A0do_open+0x72f/0xf80 fs/namei.c:3830 >> > =C2=A0path_openat+0x2ec/0x770 fs/namei.c:3989 >> > =C2=A0do_filp_open+0x1ff/0x420 fs/namei.c:4016 >> > =C2=A0do_sys_openat2+0x181/0x1e0 fs/open.c:1428 >> > =C2=A0do_sys_open fs/open.c:1443 [inline] >> > =C2=A0__do_sys_openat fs/open.c:1459 [inline] >> > =C2=A0__se_sys_openat fs/open.c:1454 [inline] >> > =C2=A0__x64_sys_openat+0x149/0x210 fs/open.c:1454 >> > =C2=A0do_syscall_x64 arch/x86/entry/common.c:52 [inline] >> > =C2=A0do_syscall_64+0x92/0x180 arch/x86/entry/common.c:83 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > Freed by task 6559: >> > =C2=A0kasan_save_stack+0x30/0x50 mm/kasan/common.c:47 >> > =C2=A0kasan_save_track+0x14/0x30 mm/kasan/common.c:68 >> > =C2=A0kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:576 >> > =C2=A0poison_slab_object mm/kasan/common.c:247 [inline] >> > =C2=A0__kasan_slab_free+0x52/0x70 mm/kasan/common.c:264 >> > =C2=A0kasan_slab_free include/linux/kasan.h:233 [inline] >> > =C2=A0slab_free_hook mm/slub.c:2353 [inline] >> > =C2=A0slab_free mm/slub.c:4609 [inline] >> > =C2=A0kfree+0x14f/0x4d0 mm/slub.c:4757 >> > =C2=A0amdgpu_driver_postclose_kms+0x43d/0x6b0 drivers/gpu/drm/amd/a= mdgpu/amdgpu_kms.c:1538 [amdgpu] >> > =C2=A0drm_file_free.part.0+0x72d/0xbc0 drivers/gpu/drm/drm_file.c:2= 55 >> > =C2=A0drm_file_free drivers/gpu/drm/drm_file.c:228 [inline] >> > =C2=A0drm_close_helper.isra.0+0x197/0x230 drivers/gpu/drm/drm_file.= c:278 >> > =C2=A0drm_release+0x1b0/0x3d0 drivers/gpu/drm/drm_file.c:426 >> > =C2=A0__fput+0x402/0xb50 fs/file_table.c:464 >> > =C2=A0task_work_run+0x155/0x250 kernel/task_work.c:227 >> > =C2=A0get_signal+0x1be/0x19d0 kernel/signal.c:2809 >> > =C2=A0arch_do_signal_or_restart+0x96/0x3a0 arch/x86/kernel/signal.c= :337 >> > =C2=A0exit_to_user_mode_loop kernel/entry/common.c:111 [inline] >> > =C2=A0exit_to_user_mode_prepare include/linux/entry-common.h:329 [i= nline] >> > =C2=A0__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [i= nline] >> > =C2=A0syscall_exit_to_user_mode+0x1fc/0x290 kernel/entry/common.c:2= 18 >> > =C2=A0do_syscall_64+0x9f/0x180 arch/x86/entry/common.c:89 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > The buggy address belongs to the object at ffff88812ebcc000 >> > The buggy address is located 1504 bytes inside of >> > The buggy address belongs to the physical page: >> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:= 0x12ebc8 >> > head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincou= nt:0 >> > flags: 0x17ffffc0000040(head|node=3D0|zone=3D2|lastcpupid=3D0x1ffff= f) >> > page_type: f5(slab) >> > raw: 0017ffffc0000040 ffff888100058780 dead000000000122 00000000000= 00000 >> > raw: 0000000000000000 0000000000020002 00000000f5000000 00000000000= 00000 >> > head: 0017ffffc0000040 ffff888100058780 dead000000000122 0000000000= 000000 >> > head: 0000000000000000 0000000000020002 00000000f5000000 0000000000= 000000 >> > head: 0017ffffc0000003 ffffea0004baf201 ffffffffffffffff 0000000000= 000000 >> > head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000= 000000 >> > page dumped because: kasan: bad access detected >> > Memory state around the buggy address: >> > =C2=A0ffff88812ebcc480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =C2=A0ffff88812ebcc500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > > ffff88812ebcc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >> > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ^ >> > =C2=A0ffff88812ebcc600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =C2=A0ffff88812ebcc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> > BUG: KASAN: slab-use-after-free in drm_sched_entity_compare_before = drivers/gpu/drm/scheduler/sched_main.c:147 [inline] [gpu_sched] >> > BUG: KASAN: slab-use-after-free in rb_add_cached include/linux/rbtr= ee.h:174 [inline] [gpu_sched] >> > BUG: KASAN: slab-use-after-free in drm_sched_rq_update_fifo_locked+= 0x47b/0x540 drivers/gpu/drm/scheduler/sched_main.c:175 [gpu_sched] >> > Read of size 8 at addr ffff8881208445c8 by task syz.1.49115/146644 >> > CPU: 7 UID: 65534 PID: 146644 Comm: syz.1.49115 Not tainted 6.14.0-= flowejam-+ #1 >> > Hardware name: Valve Galileo/Galileo, BIOS F7G0112 08/01/2024 >> > Call Trace: >> > =C2=A0 >> > =C2=A0__dump_stack lib/dump_stack.c:94 [inline] >> > =C2=A0dump_stack_lvl+0xd2/0x130 lib/dump_stack.c:120 >> > =C2=A0print_address_description.constprop.0+0x88/0x380 mm/kasan/rep= ort.c:408 >> > =C2=A0print_report+0xfc/0x1ff mm/kasan/report.c:521 >> > =C2=A0kasan_report+0xdd/0x1b0 mm/kasan/report.c:634 >> > =C2=A0drm_sched_entity_compare_before drivers/gpu/drm/scheduler/sch= ed_main.c:147 [inline] [gpu_sched] >> > =C2=A0rb_add_cached include/linux/rbtree.h:174 [inline] [gpu_sched] >> > =C2=A0drm_sched_rq_update_fifo_locked+0x47b/0x540 drivers/gpu/drm/s= cheduler/sched_main.c:175 [gpu_sched] >> > =C2=A0drm_sched_entity_push_job+0x509/0x5d0 drivers/gpu/drm/schedul= er/sched_entity.c:623 [gpu_sched] >>=20 >> This might be a race between entity killing and the push_job. Let's >> look at your patch below=E2=80=A6 >>=20 >> > =C2=A0amdgpu_job_submit+0x1a4/0x270 drivers/gpu/drm/amd/amdgpu/amdg= pu_job.c:314 [amdgpu] >> > =C2=A0amdgpu_vm_sdma_commit+0x1f9/0x7d0 drivers/gpu/drm/amd/amdgpu/= amdgpu_vm_sdma.c:122 [amdgpu] >> > =C2=A0amdgpu_vm_pt_clear+0x540/0x6b0 drivers/gpu/drm/amd/amdgpu/amd= gpu_vm_pt.c:422 [amdgpu] >> > =C2=A0amdgpu_vm_init+0x9c2/0x12f0 drivers/gpu/drm/amd/amdgpu/amdgpu= _vm.c:2609 [amdgpu] >> > =C2=A0amdgpu_driver_open_kms+0x274/0x660 drivers/gpu/drm/amd/amdgpu= /amdgpu_kms.c:1418 [amdgpu] >> > =C2=A0drm_file_alloc+0x5d0/0xa00 drivers/gpu/drm/drm_file.c:171 >> > =C2=A0drm_open_helper+0x1fe/0x540 drivers/gpu/drm/drm_file.c:323 >> > =C2=A0drm_open+0x1a7/0x400 drivers/gpu/drm/drm_file.c:376 >> > =C2=A0drm_stub_open+0x21a/0x390 drivers/gpu/drm/drm_drv.c:1149 >> > =C2=A0chrdev_open+0x23b/0x6b0 fs/char_dev.c:414 >> > =C2=A0do_dentry_open+0x743/0x1bf0 fs/open.c:956 >> > =C2=A0vfs_open+0x87/0x3f0 fs/open.c:1086 >> > =C2=A0do_open+0x72f/0xf80 fs/namei.c:3830 >> > =C2=A0path_openat+0x2ec/0x770 fs/namei.c:3989 >> > =C2=A0do_filp_open+0x1ff/0x420 fs/namei.c:4016 >> > =C2=A0do_sys_openat2+0x181/0x1e0 fs/open.c:1428 >> > =C2=A0do_sys_open fs/open.c:1443 [inline] >> > =C2=A0__do_sys_openat fs/open.c:1459 [inline] >> > =C2=A0__se_sys_openat fs/open.c:1454 [inline] >> > =C2=A0__x64_sys_openat+0x149/0x210 fs/open.c:1454 >> > =C2=A0do_syscall_x64 arch/x86/entry/common.c:52 [inline] >> > =C2=A0do_syscall_64+0x92/0x180 arch/x86/entry/common.c:83 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > RIP: 0033:0x7feb303a36ed >> > Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 4= 8 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d= 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 >> > RSP: 002b:00007feb3123c018 EFLAGS: 00000246 ORIG_RAX: 0000000000000= 101 >> > RAX: ffffffffffffffda RBX: 00007feb305e5fa0 RCX: 00007feb303a36ed >> > RDX: 0000000000000002 RSI: 0000200000000140 RDI: ffffffffffffff9c >> > RBP: 00007feb30447722 R08: 0000000000000000 R09: 0000000000000000 >> > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 >> > R13: 0000000000000001 R14: 00007feb305e5fa0 R15: 00007ffcfd0a3460 >> > =C2=A0 >> > Allocated by task 146638: >> > =C2=A0kasan_save_stack+0x30/0x50 mm/kasan/common.c:47 >> > =C2=A0kasan_save_track+0x14/0x30 mm/kasan/common.c:68 >> > =C2=A0poison_kmalloc_redzone mm/kasan/common.c:377 [inline] >> > =C2=A0__kasan_kmalloc+0x9a/0xb0 mm/kasan/common.c:394 >> > =C2=A0kmalloc_noprof include/linux/slab.h:901 [inline] [amdgpu] >> > =C2=A0kzalloc_noprof include/linux/slab.h:1037 [inline] [amdgpu] >> > =C2=A0amdgpu_driver_open_kms+0x151/0x660 drivers/gpu/drm/amd/amdgpu= /amdgpu_kms.c:1402 [amdgpu] >> > =C2=A0drm_file_alloc+0x5d0/0xa00 drivers/gpu/drm/drm_file.c:171 >> > =C2=A0drm_open_helper+0x1fe/0x540 drivers/gpu/drm/drm_file.c:323 >> > =C2=A0drm_open+0x1a7/0x400 drivers/gpu/drm/drm_file.c:376 >> > =C2=A0drm_stub_open+0x21a/0x390 drivers/gpu/drm/drm_drv.c:1149 >> > =C2=A0chrdev_open+0x23b/0x6b0 fs/char_dev.c:414 >> > =C2=A0do_dentry_open+0x743/0x1bf0 fs/open.c:956 >> > =C2=A0vfs_open+0x87/0x3f0 fs/open.c:1086 >> > =C2=A0do_open+0x72f/0xf80 fs/namei.c:3830 >> > =C2=A0path_openat+0x2ec/0x770 fs/namei.c:3989 >> > =C2=A0do_filp_open+0x1ff/0x420 fs/namei.c:4016 >> > =C2=A0do_sys_openat2+0x181/0x1e0 fs/open.c:1428 >> > =C2=A0do_sys_open fs/open.c:1443 [inline] >> > =C2=A0__do_sys_openat fs/open.c:1459 [inline] >> > =C2=A0__se_sys_openat fs/open.c:1454 [inline] >> > =C2=A0__x64_sys_openat+0x149/0x210 fs/open.c:1454 >> > =C2=A0do_syscall_x64 arch/x86/entry/common.c:52 [inline] >> > =C2=A0do_syscall_64+0x92/0x180 arch/x86/entry/common.c:83 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > Freed by task 146638: >> > =C2=A0kasan_save_stack+0x30/0x50 mm/kasan/common.c:47 >> > =C2=A0kasan_save_track+0x14/0x30 mm/kasan/common.c:68 >> > =C2=A0kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:576 >> > =C2=A0poison_slab_object mm/kasan/common.c:247 [inline] >> > =C2=A0__kasan_slab_free+0x52/0x70 mm/kasan/common.c:264 >> > =C2=A0kasan_slab_free include/linux/kasan.h:233 [inline] >> > =C2=A0slab_free_hook mm/slub.c:2353 [inline] >> > =C2=A0slab_free mm/slub.c:4609 [inline] >> > =C2=A0kfree+0x14f/0x4d0 mm/slub.c:4757 >> > =C2=A0amdgpu_driver_postclose_kms+0x43d/0x6b0 drivers/gpu/drm/amd/a= mdgpu/amdgpu_kms.c:1538 [amdgpu] >> > =C2=A0drm_file_free.part.0+0x72d/0xbc0 drivers/gpu/drm/drm_file.c:2= 55 >> > =C2=A0drm_file_free drivers/gpu/drm/drm_file.c:228 [inline] >> > =C2=A0drm_close_helper.isra.0+0x197/0x230 drivers/gpu/drm/drm_file.= c:278 >> > =C2=A0drm_release+0x1b0/0x3d0 drivers/gpu/drm/drm_file.c:426 >> > =C2=A0__fput+0x402/0xb50 fs/file_table.c:464 >> > =C2=A0task_work_run+0x155/0x250 kernel/task_work.c:227 >> > =C2=A0resume_user_mode_work include/linux/resume_user_mode.h:50 [in= line] >> > =C2=A0exit_to_user_mode_loop kernel/entry/common.c:114 [inline] >> > =C2=A0exit_to_user_mode_prepare include/linux/entry-common.h:329 [i= nline] >> > =C2=A0__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [i= nline] >> > =C2=A0syscall_exit_to_user_mode+0x26b/0x290 kernel/entry/common.c:2= 18 >> > =C2=A0do_syscall_64+0x9f/0x180 arch/x86/entry/common.c:89 >> > =C2=A0entry_SYSCALL_64_after_hwframe+0x76/0x7e >> > The buggy address belongs to the object at ffff888120844000 >> > The buggy address is located 1480 bytes inside of >> > The buggy address belongs to the physical page: >> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:= 0x120840 >> > head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincou= nt:0 >> > flags: 0x17ffffc0000040(head|node=3D0|zone=3D2|lastcpupid=3D0x1ffff= f) >> > page_type: f5(slab) >> > raw: 0017ffffc0000040 ffff88810005c8c0 ffffea0005744c00 dead0000000= 00002 >> > raw: 0000000000000000 0000000000020002 00000000f5000000 00000000000= 00000 >> > head: 0017ffffc0000040 ffff88810005c8c0 ffffea0005744c00 dead000000= 000002 >> > head: 0000000000000000 0000000000020002 00000000f5000000 0000000000= 000000 >> > head: 0017ffffc0000003 ffffea0004821001 ffffffffffffffff 0000000000= 000000 >> > head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000= 000000 >> > page dumped because: kasan: bad access detected >> > Memory state around the buggy address: >> > =C2=A0ffff888120844480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =C2=A0ffff888120844500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > > ffff888120844580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >> > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ^ >> > =C2=A0ffff888120844600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =C2=A0ffff888120844680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb f= b fb >> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> >=20 >> > =C2=A0drivers/gpu/drm/scheduler/sched_main.c | 6 ++++-- >> > =C2=A01 file changed, 4 insertions(+), 2 deletions(-) >> >=20 >> > diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/d= rm/scheduler/sched_main.c >> > index bfea608a7106..997a2cc1a635 100644 >> > --- a/drivers/gpu/drm/scheduler/sched_main.c >> > +++ b/drivers/gpu/drm/scheduler/sched_main.c >> > @@ -172,8 +172,10 @@ void drm_sched_rq_update_fifo_locked(struct dr= m_sched_entity *entity, >> > =C2=A0 >> > =C2=A0 entity->oldest_job_waiting =3D ts; >> > =C2=A0 >> > - rb_add_cached(&entity->rb_tree_node, &rq->rb_tree_root, >> > - =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 drm_sched_entity_compare_before); >> > + if (!entity->stopped) { >> > + rb_add_cached(&entity->rb_tree_node, &rq->rb_tree_root, >> > + =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 drm_sched_entity_compare_before); >> > + } >>=20 >> If this is a race, then this patch here is broken, too, because you're >> checking the 'stopped' boolean as the callers of that function do, too >> =E2=80=93 just later. :O >>=20 >> Could still race, just less likely. >>=20 >> The proper way to fix it would then be to address the issue where the >> locking is supposed to happen. Let's look at, for example, >> drm_sched_entity_push_job(): >>=20 >>=20 >> void drm_sched_entity_push_job(struct drm_sched_job *sched_job) >> { >> (Bla bla bla) >>=20 >> =C2=A0 =E2=80=A6=E2=80=A6=E2=80=A6=E2=80=A6 >>=20 >> /* first job wakes up scheduler */ >> if (first) { >> struct drm_gpu_scheduler *sched; >> struct drm_sched_rq *rq; >>=20 >> /* Add the entity to the run queue */ >> spin_lock(&entity->lock); >> if (entity->stopped) {=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <---- Aha! >> spin_unlock(&entity->lock); >>=20 >> DRM_ERROR("Trying to push to a killed entity\n"); >> return; >> } >>=20 >> rq =3D entity->rq; >> sched =3D rq->sched; >>=20 >> spin_lock(&rq->lock); >> drm_sched_rq_add_entity(rq, entity); >>=20 >> if (drm_sched_policy =3D=3D DRM_SCHED_POLICY_FIFO) >> drm_sched_rq_update_fifo_locked(entity, rq, submit_ts); <---- bumm! >>=20 >> spin_unlock(&rq->lock); >> spin_unlock(&entity->lock); >>=20 >> But the locks are still being hold. So that "shouldn't be happening"(= tm). >>=20 >> Interesting. AFAICS only drm_sched_entity_kill() and drm_sched_fini() >> stop entities. The former holds appropriate locks, but drm_sched_fini= () >> doesn't. So that looks like a hot candidate to me. Opinions? >>=20 >> On the other hand, aren't drivers prohibited from calling >> drm_sched_entity_push_job() after calling drm_sched_fini()? If the >> fuzzer does that, then it's not the scheduler's fault. >>=20 >> Could you test adding spin_lock(&entity->lock) to drm_sched_fini()? > > Ah no, forget about that. > > In drm_sched_fini(), you'd have to take the locks in reverse order as > in drm_sched_entity_push/pop_job(), thereby replacing race with > deadlock. > > I suspect that this is an issue in amdgpu. But let's wait for > Christian. > > > P. > > >>=20 >> Would be cool if Tvrtko and Christian take a look. Maybe we even have= a >> fundamental design issue. >>=20 >>=20 >> Regards >> P. >>=20 >>=20 >> > =C2=A0} >> > =C2=A0 >> > =C2=A0/** >> Thanks for taking a look at this. I did try to get a reproducer using sy= zkaller, without success. I can attempt it myself but I expect it will t= ake me some time, if I'm able to at all with this bug. I did run some of= the igt-gpu-tools tests (amdgpu and drm ones), and there was no differe= nce after the changes on my system. After this change I wasn't running i= nto the UAF errors after 100k+ executions but I see what you mean, Phili= pp - perhaps it's missing the root issue.=20 FYI, as an experiment I forced the use of RR with "drm_sched_policy =3D = DRM_SCHED_POLICY_RR", and I'm not seeing any slab-use-after-frees, so ma= ybe the problem is with the FIFO implementation?=20 For now, the closest thing to a reproducer I can provide is my syzkaller= config, in case anyone else is able to try this with a Steam Deck OLED.= I've included this below along with an example program run by syzkaller= (in generated C code and a Syz language version). --------------------------------------------------- { "target": "linux/amd64", "http": "127.0.0.1:56741", "sshkey" : "/path", "workdir": "/path", "kernel_obj": "/path", "kernel_src": "/path", "syzkaller": "/path", "sandbox": "setuid", "type": "isolated", "enable_syscalls": ["openat$drirender128", "ioctl$DRM_*", "close"], "disable_syscalls": ["ioctl$DRM_IOCTL_SYNCOBJ_*"], "reproduce": false, "vm": { "targets" : [ "10.0.0.1" ], "pstore": false, "target_dir" : "/path", "target_reboot" : true } } --------------------------------------------------- Generated C program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE=20 #include #include #include #include #include #include #include #include uint64_t r[15] =3D {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffff= ffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xffffffffffffffff,= 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0xffffffffffffffff, 0xfffffffff= fffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=3D*/0x1ffffffff000ul, /*len=3D*/0x1000ul, /*= prot=3D*/0ul, /*flags=3DMAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*f= d=3D*/(intptr_t)-1, /*offset=3D*/0ul); syscall(__NR_mmap, /*addr=3D*/0x200000000000ul, /*len=3D*/0x1000000ul, = /*prot=3DPROT_WRITE|PROT_READ|PROT_EXEC*/7ul, /*flags=3DMAP_FIXED|MAP_AN= ONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=3D*/(intptr_t)-1, /*offset=3D*/0ul); syscall(__NR_mmap, /*addr=3D*/0x200001000000ul, /*len=3D*/0x1000ul, /*p= rot=3D*/0ul, /*flags=3DMAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd= =3D*/(intptr_t)-1, /*offset=3D*/0ul); const char* reason; (void)reason; intptr_t res =3D 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1))= {} memcpy((void*)0x200000000200, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x200000000200ul, /*flags=3DO_SYNC*/0x101000, /*mode=3D*/0); if (res !=3D -1) r[0] =3D res; *(uint32_t*)0x200000002440 =3D 0; *(uint32_t*)0x200000002444 =3D 0x80000; syscall(__NR_ioctl, /*fd=3D*/r[0], /*cmd=3D*/0xc00c642d, /*arg=3D*/0x20= 0000002440ul); memcpy((void*)0x2000000001c0, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x2000000001c0ul, /*flags=3DO_NOFOLLOW|O_CREAT|O_CLOEXEC*/0xa0040, /*mod= e=3D*/0); if (res !=3D -1) r[1] =3D res; syscall(__NR_ioctl, /*fd=3D*/r[1], /*cmd=3D*/0x4b47, /*arg=3D*/0ul); memcpy((void*)0x200000000300, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x200000000300ul, /*flags=3DO_SYNC|O_NONBLOCK|O_LARGEFILE*/0x109800, /*m= ode=3D*/0); if (res !=3D -1) r[2] =3D res; memcpy((void*)0x200000000100, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x200000000100ul, /*flags=3D*/0, /*mode=3D*/0); if (res !=3D -1) r[3] =3D res; syscall(__NR_ioctl, /*fd=3D*/r[3], /*cmd=3D*/0x80f86406, /*arg=3D*/0ul); memcpy((void*)0x200000000440, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x200000000440ul, /*flags=3DO_NONBLOCK|O_CREAT*/0x840, /*mode=3D*/0); if (res !=3D -1) r[4] =3D res; *(uint64_t*)0x200000000fc0 =3D 0; *(uint32_t*)0x200000000fc8 =3D 0; *(uint32_t*)0x200000000fcc =3D 0; res =3D syscall(__NR_ioctl, /*fd=3D*/r[4], /*cmd=3D*/0xc06864a1, /*arg=3D= */0x200000000fc0ul); if (res !=3D -1) r[5] =3D *(uint32_t*)0x200000000fd0; syscall(__NR_close, /*fd=3D*/r[2]); *(uint32_t*)0x200000000000 =3D 0; *(uint32_t*)0x200000000004 =3D 0; syscall(__NR_ioctl, /*fd=3D*/r[4], /*cmd=3D*/0xc00c642d, /*arg=3D*/0x20= 0000000000ul); *(uint32_t*)0x200000000040 =3D 0; *(uint32_t*)0x200000000044 =3D 0; res =3D syscall(__NR_ioctl, /*fd=3D*/r[3], /*cmd=3D*/0xc00c642d, /*arg=3D= */0x200000000040ul); if (res !=3D -1) r[6] =3D *(uint32_t*)0x200000000048; *(uint32_t*)0x200000000080 =3D 0; res =3D syscall(__NR_ioctl, /*fd=3D*/r[2], /*cmd=3D*/0xc010640b, /*arg=3D= */0x200000000080ul); if (res !=3D -1) r[7] =3D *(uint32_t*)0x200000000084; *(uint32_t*)0x2000000000c0 =3D 0; res =3D syscall(__NR_ioctl, /*fd=3D*/r[4], /*cmd=3D*/0xc010640b, /*arg=3D= */0x2000000000c0ul); if (res !=3D -1) r[8] =3D *(uint32_t*)0x2000000000c4; memcpy((void*)0x2000000001c0, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x2000000001c0ul, /*flags=3DO_NOFOLLOW|O_CREAT|O_CLOEXEC*/0xa0040, /*mod= e=3D*/0); if (res !=3D -1) r[9] =3D res; syscall(__NR_ioctl, /*fd=3D*/r[9], /*cmd=3D*/0x5421, /*arg=3D*/0ul); *(uint32_t*)0x200000000180 =3D r[5]; *(uint32_t*)0x200000000184 =3D 0x2534dd8; *(uint32_t*)0x200000000188 =3D 7; *(uint32_t*)0x20000000018c =3D 3; *(uint32_t*)0x200000000190 =3D 2; *(uint32_t*)0x2000000001a4 =3D 0x97; *(uint32_t*)0x2000000001a8 =3D 0x74c83423; *(uint32_t*)0x2000000001ac =3D 4; *(uint32_t*)0x2000000001b0 =3D 8; *(uint32_t*)0x2000000001b4 =3D 6; *(uint32_t*)0x2000000001b8 =3D 0x7f; *(uint32_t*)0x2000000001bc =3D 0; *(uint32_t*)0x2000000001c0 =3D 9; *(uint64_t*)0x2000000001c8 =3D 3; *(uint64_t*)0x2000000001d0 =3D 0; *(uint64_t*)0x2000000001d8 =3D 1; *(uint64_t*)0x2000000001e0 =3D 1; res =3D syscall(__NR_ioctl, /*fd=3D*/r[3], /*cmd=3D*/0xc06864ce, /*arg=3D= */0x200000000180ul); if (res !=3D -1) r[10] =3D *(uint32_t*)0x200000000198; *(uint32_t*)0x200000000200 =3D r[5]; *(uint32_t*)0x200000000204 =3D 1; *(uint32_t*)0x200000000208 =3D 1; *(uint32_t*)0x20000000020c =3D 0; *(uint32_t*)0x200000000210 =3D 1; *(uint32_t*)0x200000000214 =3D r[7]; *(uint32_t*)0x200000000218 =3D r[8]; *(uint32_t*)0x20000000021c =3D 0; *(uint32_t*)0x200000000220 =3D r[10]; *(uint32_t*)0x200000000224 =3D 9; *(uint32_t*)0x200000000228 =3D 7; *(uint32_t*)0x20000000022c =3D 2; *(uint32_t*)0x200000000230 =3D 2; *(uint32_t*)0x200000000234 =3D 0x400; *(uint32_t*)0x200000000238 =3D 0x367; *(uint32_t*)0x20000000023c =3D 7; *(uint32_t*)0x200000000240 =3D 8; *(uint64_t*)0x200000000248 =3D 0x3e; *(uint64_t*)0x200000000250 =3D 3; *(uint64_t*)0x200000000258 =3D 9; *(uint64_t*)0x200000000260 =3D 6; syscall(__NR_ioctl, /*fd=3D*/r[6], /*cmd=3D*/0xc06864b8, /*arg=3D*/0x20= 0000000200ul); res =3D syscall(__NR_ioctl, /*fd=3D*/r[6], /*cmd=3D*/0xc0086420, /*arg=3D= */0x200000000140ul); if (res !=3D -1) r[11] =3D *(uint32_t*)0x200000000140; *(uint32_t*)0x200000000280 =3D r[11]; *(uint32_t*)0x200000000284 =3D 0x26; syscall(__NR_ioctl, /*fd=3D*/r[3], /*cmd=3D*/0x4008642a, /*arg=3D*/0x20= 0000000280ul); memcpy((void*)0x200000000300, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x200000000300ul, /*flags=3DO_SYNC|O_NONBLOCK|O_LARGEFILE*/0x109800, /*m= ode=3D*/0); if (res !=3D -1) r[12] =3D res; memcpy((void*)0x200000000100, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x200000000100ul, /*flags=3D*/0, /*mode=3D*/0); if (res !=3D -1) r[13] =3D res; syscall(__NR_ioctl, /*fd=3D*/r[13], /*cmd=3D*/0x80f86406, /*arg=3D*/0ul= ); memcpy((void*)0x200000000440, "/dev/dri/renderD128\000", 20); res =3D syscall(__NR_openat, /*fd=3D*/0xffffffffffffff9cul, /*file=3D*/= 0x200000000440ul, /*flags=3DO_NONBLOCK|O_CREAT*/0x840, /*mode=3D*/0); if (res !=3D -1) r[14] =3D res; *(uint64_t*)0x200000000fc0 =3D 0; *(uint32_t*)0x200000000fc8 =3D 0; *(uint32_t*)0x200000000fcc =3D 0; syscall(__NR_ioctl, /*fd=3D*/r[14], /*cmd=3D*/0xc06864a1, /*arg=3D*/0x2= 00000000fc0ul); syscall(__NR_close, /*fd=3D*/r[12]); *(uint32_t*)0x200000000000 =3D 0; *(uint32_t*)0x200000000004 =3D 0; syscall(__NR_ioctl, /*fd=3D*/r[14], /*cmd=3D*/0xc00c642d, /*arg=3D*/0x2= 00000000000ul); *(uint32_t*)0x200000000040 =3D 0; *(uint32_t*)0x200000000044 =3D 0; syscall(__NR_ioctl, /*fd=3D*/r[13], /*cmd=3D*/0xc00c642d, /*arg=3D*/0x2= 00000000040ul); *(uint32_t*)0x200000000080 =3D 0; syscall(__NR_ioctl, /*fd=3D*/r[12], /*cmd=3D*/0xc010640b, /*arg=3D*/0x2= 00000000080ul); *(uint32_t*)0x2000000000c0 =3D 0; syscall(__NR_ioctl, /*fd=3D*/r[14], /*cmd=3D*/0xc010640b, /*arg=3D*/0x2= 000000000c0ul); return 0; } --------------------------------------------------- Syzkaller program (Syz language): r0 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f0000000200), 0x1010= 00, 0x0) ioctl$DRM_IOCTL_PRIME_HANDLE_TO_FD(r0, 0xc00c642d, &(0x7f0000002440)=3D{= 0x0, 0x80000}) r1 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f00000001c0), 0xa004= 0, 0x0) ioctl$DRM_IOCTL_RES_CTX(r1, 0x4b47, 0x0) r2 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f0000000300), 0x1098= 00, 0x0) r3 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f0000000100), 0x0, 0= x0) ioctl$DRM_IOCTL_GET_STATS(r3, 0x80f86406, 0x0) r4 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f0000000440), 0x840,= 0x0) ioctl$DRM_IOCTL_MODE_GETCRTC(r4, 0xc06864a1, &(0x7f0000000fc0)=3D{0x0, 0= x0, 0x0, 0x0}) close(r2) ioctl$DRM_IOCTL_PRIME_HANDLE_TO_FD(r4, 0xc00c642d, &(0x7f0000000000)) ioctl$DRM_IOCTL_PRIME_HANDLE_TO_FD(r3, 0xc00c642d, &(0x7f0000000040)=3D{= 0x0, 0x0, 0xffffffffffffffff}) ioctl$DRM_IOCTL_GEM_OPEN(r2, 0xc010640b, &(0x7f0000000080)=3D{0x0, 0x0}) ioctl$DRM_IOCTL_GEM_OPEN(r4, 0xc010640b, &(0x7f00000000c0)=3D{0x0, 0x0}) r9 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f00000001c0), 0xa004= 0, 0x0) ioctl$DRM_IOCTL_RES_CTX(r9, 0x5421, 0x0) ioctl$DRM_IOCTL_MODE_GETFB2(r3, 0xc06864ce, &(0x7f0000000180)=3D{r5, 0x2= 534dd8, 0x7, 0x3, 0x2, [0x0, 0x0], [0x97, 0x74c83423, 0x4, 0x8],= [0x6, 0x7f, 0x0, 0x9], [0x3, 0x0, 0x1, 0x1]}) ioctl$DRM_IOCTL_MODE_ADDFB2(r6, 0xc06864b8, &(0x7f0000000200)=3D{r5, 0x1= , 0x1, 0x0, 0x1, [r7, r8, 0x0, r10], [0x9, 0x7, 0x2, 0x2], [0x400, 0x367= , 0x7, 0x8], [0x3e, 0x3, 0x9, 0x6]}) ioctl$DRM_IOCTL_ADD_CTX(r6, 0xc0086420, &(0x7f0000000140)=3D{0x0= }) ioctl$DRM_IOCTL_LOCK(r3, 0x4008642a, &(0x7f0000000280)=3D{r11, 0x26}) r12 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f0000000300), 0x109= 800, 0x0) r13 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f0000000100), 0x0, = 0x0) ioctl$DRM_IOCTL_GET_STATS(r13, 0x80f86406, 0x0) r14 =3D openat$drirender128(0xffffffffffffff9c, &(0x7f0000000440), 0x840= , 0x0) ioctl$DRM_IOCTL_MODE_GETCRTC(r14, 0xc06864a1, &(0x7f0000000fc0)=3D{0x0}) close(r12) ioctl$DRM_IOCTL_PRIME_HANDLE_TO_FD(r14, 0xc00c642d, &(0x7f0000000000)) ioctl$DRM_IOCTL_PRIME_HANDLE_TO_FD(r13, 0xc00c642d, &(0x7f0000000040)) ioctl$DRM_IOCTL_GEM_OPEN(r12, 0xc010640b, &(0x7f0000000080)) ioctl$DRM_IOCTL_GEM_OPEN(r14, 0xc010640b, &(0x7f00000000c0))