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wlr_drm_lease_v1: Fix use-after-free in backend_destroy()
valgrind said (on exit from labwc): Invalid write of size 8 at 0x487DEAF: wl_list_remove (wayland-util.c:56) by 0x487DF80: wl_signal_emit_mutable (wayland-server.c:2182) by 0x48CD6B7: backend_destroy.part.0.lto_priv.0 (backend.c:41) by 0x48DC19D: multi_backend_destroy (backend.c:58) by 0x4880286: UnknownInlinedFun (wayland-server.c:2315) by 0x4880286: wl_display_destroy (wayland-server.c:1170) by 0x112491: UnknownInlinedFun (server.c:485) by 0x112491: main (main.c:110) Address 0x1f9d0210 is 112 bytes inside a block of size 136 free'd at 0x484426F: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) by 0x487DF6D: wl_signal_emit_mutable (wayland-server.c:2179) by 0x48CD6B7: backend_destroy.part.0.lto_priv.0 (backend.c:41) by 0x48DC19D: multi_backend_destroy (backend.c:58) by 0x4880286: UnknownInlinedFun (wayland-server.c:2315) by 0x4880286: wl_display_destroy (wayland-server.c:1170) by 0x112491: UnknownInlinedFun (server.c:485) by 0x112491: main (main.c:110) Block was alloc'd at at 0x4846A73: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) by 0x4918D4E: drm_lease_device_v1_create (wlr_drm_lease_v1.c:639) by 0x48D3B00: wlr_multi_for_each_backend (backend.c:249) by 0x49191D2: wlr_drm_lease_v1_manager_create (wlr_drm_lease_v1.c:706) by 0x111EE9: UnknownInlinedFun (server.c:384) by 0x111EE9: main (main.c:92)
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@ -126,6 +126,7 @@ static void drm_lease_device_v1_destroy(
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}
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wl_list_remove(&device->link);
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wl_list_remove(&device->backend_destroy.link);
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wlr_global_destroy_safe(device->global);
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free(device);
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