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abrt 1.0.8 detected a crash. architecture: x86_64 Attached file: backtrace cmdline: keuphoria.kss -root comment: Fully updated FC12 KDE system, nvidia from RPMFusion none-free component: kdeartwork executable: /usr/bin/keuphoria.kss kernel: 2.6.32.9-70.fc12.x86_64 package: kdeartwork-screensavers-4.4.0-1.fc12 rating: 3 reason: Process /usr/bin/keuphoria.kss was killed by signal 6 (SIGABRT) release: Fedora release 12 (Constantine) How to reproduce ----- 1. Set Euphoria as screen saver 2. Go to lunch (Or other wise very idle system that will triger a screensaver 3. ...
Created attachment 399116 [details] File: backtrace
OK It also happen with SolarWinds I guess any GL screen saver. Yes all "Desktop effects" are on Thanks Boaz
Looks like an nvidia driver issue to me. the backtrace is deep into #4 0x00000039ce788e46 in ?? () from /usr/lib64/nvidia/libGLcore.so.1 No symbol table info available. #5 0x00000039ce4b6792 in ?? () from /usr/lib64/nvidia/libGLcore.so.1 No symbol table info available. #6 0x00000039ce4b7707 in ?? () from /usr/lib64/nvidia/libGLcore.so.1 No symbol table info available. #7 0x00000039ce4bbe2d in ?? () from /usr/lib64/nvidia/libGLcore.so.1 No symbol table info available. #8 0x00000039ce49c99a in ?? () from /usr/lib64/nvidia/libGLcore.so.1 No symbol table info available. #9 0x00000039ce7a9839 in ?? () from /usr/lib64/nvidia/libGLcore.so.1 No symbol table info available. #10 0x00000039ce523c51 in ?? () from /usr/lib64/nvidia/libGLcore.so.1 No symbol table info available. #11 0x00000039ce7db65a in ?? () from /usr/lib64/nvidia/libGLcore.so.1 that's out of our hands.
Well yes I guess so. It was fine up until the last big update where I received both a new KDE, and a new nvidia driver. The later maybe because the Kernel changed to 2.6.32. So perhaps someone at nvidia is watching over FC bugzilla. But just wanted to make sure it's not a new KDE thing with all compositing on and GL screensavers. Thanks anyway Boaz
Hi. I have some new information. The crash happens when we go out of the screen saver at shot down. (Every time almost) So I was looking at the code (In google/codesearch) and it looks like it is possible that the wind:update() which is on a timer, might be racing with the wind destructor. And then glXXX crashes on a garbage particles[] pointer. The trace is a bit different every time, always in wind:update() from the timer. (I'm un-closing the bug, if that's me bad. Please forgive me) Never say never Boaz
Please: * provide evidence for that theory, such as a Valgrind memcheck log which shows the use-after-free and/or * try to reproduce this crash with one of the drivers in Fedora (but Nouveau 3D is only available in F13 Alpha at this time).
I have tried reproducing this with keuphoria.kss in the windowed demo mode on the Free radeon driver. I didn't get a crash so far, but I consistently get these when closing the window: X Error: RenderBadPicture (invalid Picture parameter) 156 Extension: 147 (RENDER) Minor opcode: 7 (RenderFreePicture) Resource id: 0x106 X Error: BadWindow (invalid Window parameter) 3 Major opcode: 18 (X_ChangeProperty) Resource id: 0x540002d X Error: BadWindow (invalid Window parameter) 3 Major opcode: 4 (X_DestroyWindow) Resource id: 0x540002d This may be related to a use-after-free like the one you hypothize.
Valgrind doesn't detect a use-after-free when the above errors are produced though, so this may be entirely unrelated.
OK It might not be a use-after-free per-se but that the GL resources or window were destroyed while the "update" timer is in progress. To me it looks very related. It seems like the Radeon driver is more resilient to errors then the nvidia, but there is certainly some short-comings with these kde-savers. I did not compile and am not a KDE programmer, just your regular devoted FC user. I think it is worth while to documenting this in Bugzilla and have some KDE person have a look. Thanks Boaz
*** Bug 579901 has been marked as a duplicate of this bug. ***
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In latest FC12 updates this bug is fixed. I cannot say when exactly but lately it does not happen at all. As before It would every morning. So something fixed it in the last month or two Thanks Boaz