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AFNElJ/ynzOKI6oYu7CHUJ5fXoVT4GwGTSLArDcdWIvhWDOn8thyC/w+42d8ugAOTgfPanjd57tn+amv00sTU1Q=@vger.kernel.org X-Gm-Message-State: AOJu0Yw2PTnu/19q5Z+khvBFcuB6LbjQ4bwHw+3jLC1hnYM6FVNztHao lyVv/BA8ibcfQseLQyawP5vHN+9oYRbz/s901no7ufiT0OWFCgkCmqaAYz8UHcGQdKFyKeeM/5E JXTaxEZro7IMKgpsb/FBax4acryee+eR2AML3vv0wMGPIVbTaPrNzV/VnxWI= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2d05:b0:696:7d51:79dd with SMTP id 006d021491bc7-69998d175eamr5444927eaf.28.1778196921815; Thu, 07 May 2026 16:35:21 -0700 (PDT) Date: Thu, 07 May 2026 16:35:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69fd21b9.050a0220.3cf765.0360.GAE@google.com> Subject: [syzbot] [dri?] [media?] WARNING in dma_resv_add_fence From: syzbot To: christian.koenig@amd.com, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: fcee7d82f27d Merge tag 'net-7.1-rc3' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1107ddba580000 kernel config: https://syzkaller.appspot.com/x/.config?x=59da38148f3a3d24 dashboard link: https://syzkaller.appspot.com/bug?extid=72bd3dd3a5d5f39a0271 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13dfca73980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1599bb26580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-fcee7d82.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a5dee9aef2ac/vmlinux-fcee7d82.xz kernel image: https://storage.googleapis.com/syzbot-assets/7b1a8dd09a15/bzImage-fcee7d82.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+72bd3dd3a5d5f39a0271@syzkaller.appspotmail.com R13: 00007f7755215fac R14: 00007f7755215fa0 R15: 00007f7755215fa0 ------------[ cut here ]------------ debug_locks && !(lock_is_held(&(&(obj)->lock.base)->dep_map) != 0) WARNING: drivers/dma-buf/dma-resv.c:296 at dma_resv_add_fence+0x71e/0x840 drivers/dma-buf/dma-resv.c:296, CPU#2: syz.0.17/5919 Modules linked in: CPU: 2 UID: 0 PID: 5919 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:dma_resv_add_fence+0x71e/0x840 drivers/dma-buf/dma-resv.c:296 Code: 44 24 08 be ff ff ff ff 48 8d 78 60 e8 db 3b 33 05 31 ff 89 c3 89 c6 e8 e0 58 b1 fb 85 db 0f 85 26 fa ff ff e8 23 5e b1 fb 90 <0f> 0b 90 e9 18 fa ff ff e8 15 5e b1 fb be 03 00 00 00 4c 89 e7 e8 RSP: 0018:ffffc9000448f168 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff865734f0 RDX: ffff8880261ea500 RSI: ffffffff865734fd RDI: ffff8880261ea500 RBP: ffff88802d439f70 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802d439f00 R13: ffff88802d439f00 R14: 1ffff92000891e39 R15: ffff88802853e800 FS: 00005555690ac500(0000) GS:ffff8880d6572000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32a63fff CR3: 000000003fb78000 CR4: 0000000000352ef0 Call Trace: virtio_gpu_array_add_fence+0xcd/0x140 drivers/gpu/drm/virtio/virtgpu_gem.c:257 virtio_gpu_queue_ctrl_sgs drivers/gpu/drm/virtio/virtgpu_vq.c:410 [inline] virtio_gpu_queue_fenced_ctrl_buffer+0x578/0xfb0 drivers/gpu/drm/virtio/virtgpu_vq.c:500 virtio_gpu_cursor_plane_update+0x411/0xbc0 drivers/gpu/drm/virtio/virtgpu_plane.c:463 drm_atomic_helper_commit_planes+0x497/0xf10 drivers/gpu/drm/drm_atomic_helper.c:3038 drm_atomic_helper_commit_tail+0x7f/0x130 drivers/gpu/drm/drm_atomic_helper.c:1989 commit_tail+0x338/0x430 drivers/gpu/drm/drm_atomic_helper.c:2074 drm_atomic_helper_commit+0x303/0x380 drivers/gpu/drm/drm_atomic_helper.c:2312 drm_atomic_commit+0x230/0x300 drivers/gpu/drm/drm_atomic.c:1789 drm_atomic_helper_update_plane+0x314/0x400 drivers/gpu/drm/drm_atomic_helper.c:3438 __setplane_atomic+0x22d/0x350 drivers/gpu/drm/drm_plane.c:1101 drm_mode_cursor_universal+0x5e9/0xe20 drivers/gpu/drm/drm_plane.c:1256 drm_mode_cursor_common+0x308/0x970 drivers/gpu/drm/drm_plane.c:1315 drm_mode_cursor_ioctl+0xd4/0x110 drivers/gpu/drm/drm_plane.c:1365 drm_ioctl_kernel+0x1f3/0x3e0 drivers/gpu/drm/drm_ioctl.c:804 drm_ioctl+0x5e6/0xc60 drivers/gpu/drm/drm_ioctl.c:901 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7754f9cdd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd0c03a0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7755215fa0 RCX: 00007f7754f9cdd9 RDX: 0000200000000100 RSI: 00000000c01c64a3 RDI: 0000000000000003 RBP: 00007ffd0c03a120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007f7755215fac R14: 00007f7755215fa0 R15: 00007f7755215fa0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup