https://bugs.kde.org/show_bug.cgi?id=479718
Bug ID: 479718 Summary: kscreen-doctor heap corruption Classification: Plasma Product: KScreen Version: 5.27.10 Platform: Fedora RPMs OS: Linux Status: REPORTED Severity: crash Priority: NOR Component: common Assignee: kscreen-bugs-n...@kde.org Reporter: tim.k...@gmail.com Target Milestone: --- Created attachment 164855 --> https://bugs.kde.org/attachment.cgi?id=164855&action=edit amdgpu crash SUMMARY Originally posted at https://invent.kde.org/plasma/libkscreen/-/issues/4 Originally raised here (https://github.com/NVIDIA/egl-wayland/issues/99) as I thought this might be related to nVidia proprietary drivers, however I'm able to reproduce heap corruption (even if it manifest slightly differently) with both nouveau and amdgpu drivers Eric was able to demonstrate with valgrind (details in the ticket referenced above). The issue occurs during cleanup/teardown after running `kscreen-doctor -o` With nvidia (proprietary) drivers, the issue could be demonstrated easily (almost every other execution attempt) With nouveau or amdgpu drivers, the issue is much less regular, perhaps after 100 or so iterations. The crash errors range from: `malloc_consolidate(): unaligned fastbin chunk detected` `Segmentation fault (core dumped)` `malloc(): unsorted double linked list corrupted` `corrupted double-linked list` See attachments. My setup: ``` System: Kernel: 6.6.9-200.fc39.x86_64 arch: x86_64 bits: 64 compiler: gcc v: 2.40-13.fc39 Desktop: KDE Plasma v: 5.27.10 Distro: Fedora release 39 (Thirty Nine) Machine: Type: Desktop Mobo: ASUSTeK model: STRIX Z270G GAMING v: Rev 1.xx serial: <superuser required> UEFI: American Megatrends v: 1501 date: 07/13/2021 CPU: Info: quad core model: Intel Core i7-7700K bits: 64 type: MT MCP arch: Kaby Lake rev: 9 cache: L1: 256 KiB L2: 1024 KiB L3: 8 MiB Speed (MHz): avg: 800 min/max: 800/4500 cores: 1: 800 2: 800 3: 800 4: 800 5: 800 6: 800 7: 800 8: 800 bogomips: 67200 Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 Graphics: Device-1: NVIDIA GM204 [GeForce GTX 970] vendor: ASUSTeK driver: N/A arch: Maxwell bus-ID: 01:00.0 Device-2: AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] vendor: Sapphire Nitro+ driver: amdgpu v: kernel arch: GCN-4 bus-ID: 02:00.0 temp: 52.0 C Display: wayland server: X.Org v: 23.2.3 with: Xwayland v: 23.2.3 compositor: kwin_wayland driver: X: loaded: amdgpu,nvidia unloaded: fbdev,modesetting,nouveau,vesa dri: swrast gpu: amdgpu resolution: 1: 3840x2160~60Hz 2: 1440x2560~60Hz 3: 1024x768~60Hz API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast platforms: active: gbm,wayland,x11,surfaceless,device inactive: N/A API: OpenGL v: 4.6 compat-v: 4.5 vendor: mesa v: 23.3.2 glx-v: 1.4 direct-render: yes renderer: llvmpipe (LLVM 17.0.6 256 bits) API: Vulkan v: 1.3.268 drivers: radv,llvmpipe surfaces: xcb,xlib,wayland devices: 2 ``` STEPS TO REPRODUCE 1. Repeatedly execute `kscreen-doctor -o` (alternatively, valgrind) OBSERVED RESULT Heap corruption EXPECTED RESULT No heap corruption SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Plasma Version: 5.27.10 KDE Frameworks Version: 5.111.0 Qt Version: 5.15.11 -- You are receiving this mail because: You are watching all bug changes.