Blender CRASH with alembic file #51262
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Unbreak Now!
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Reference: blender/blender#51262
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System Information
Operating system and graphics card
Windows 10 with NVIDIA GeForce GTX 970
Ubuntu 16.04 LTS with NVIDIA GeForce GT 530
Blender Version
Broken: (example: 2.78, see splash screen)
Worked: (optional)
Short description of error
Blender CRASHES with alembic file import
norman11.abc
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps
Just exporting alembic cache from Maya project
Import to alembic file to Blender
CRASH
Changed status to: 'Open'
Added subscriber: @foxist
Added subscribers: @dr.sybren, @Sergey
@dr.sybren, mind having a look? Thanks!
@foxist at least give us the version of Blender you used to test. Those fields are there for a reason.
The file works fine in current Master, please test with a daily build from builder.blender.org/download/
Oh Im sorry, my fault... But yes, I used the last daily build before report this problem. Just now I have downloaded the daily build again and also I have exported another alembic file from the same Maya project and the problem still persisting in Blender. Maya imports the alembic without problem, so it isn't a corrupted file though...
Windows -> Blender 2.78 Hash:6c26911
Ubuntu -> Blender 2.78 Hash:6c26911c3d
Then attach the crashing file to this ticket, otherwise we can't investigate the issue.
It's the alembic from the opening post that crash Blender, I only was telling before that Maya imports this alembic file pefectly, just to check may the alembic file itself wouldn't be corrupted or bad exported, which is not the case, but Blender still doesn't work with this alembic file.
So, I have downloaded the last build again-> 2.78 Hash:
e4ab70d
In Ubuntu works perfectly now!, but the problem still on windows 10, I just import the alembic and Windows close Blender, there is no more...
Added subscriber: @LazyDodo
I Can repro on windows easily with the file from the opening post, asan on linux should be able to catch this one as well i suppose. You're overflowing a buffer here
https://git.blender.org/gitweb/gitweb.cgi/blender.git/blob/HEAD:/source/blender/alembic/intern/alembic_capi.cc#l545
abc_path->path is a char[1024]
full_name is 1121 characters
PATH_MAX is 4096
so yeah...
boom
Thanks for catching this @LazyDodo. Indeed, Asan picked it up too.
This issue was referenced by
3128600a8a
Changed status from 'Open' to: 'Resolved'