Blender CRASH with alembic file #51262

New Issue

Fran · 2017-04-20T12:38:06+02:00

Fran commented

2017-04-20 12:38:06 +02:00

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

**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](https://archive.blender.org/developer/F556445/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

Fran commented

2017-04-20 12:38:06 +02:00

Changed status to: 'Open'

Fran commented

2017-04-20 12:38:06 +02:00

Added subscriber: @foxist

Sergey Sharybin commented

2017-04-20 12:54:05 +02:00

Added subscribers: @dr.sybren, @Sergey

Sybren A. Stüvel was assigned by Sergey Sharybin

2017-04-20 12:54:05 +02:00

Sergey Sharybin commented

2017-04-20 12:54:05 +02:00

@dr.sybren, mind having a look? Thanks!

Sybren A. Stüvel commented

2017-04-20 13:02:26 +02:00

@foxist at least give us the version of Blender you used to test. Those fields are there for a reason.

Sybren A. Stüvel commented

2017-04-20 13:03:51 +02:00

The file works fine in current Master, please test with a daily build from builder.blender.org/download/

Fran commented

2017-04-20 22:02:38 +02:00

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

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

Sybren A. Stüvel commented

2017-04-21 10:03:34 +02:00

Then attach the crashing file to this ticket, otherwise we can't investigate the issue.

Fran commented

2017-04-21 19:26:01 +02:00

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...

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... ![screen.png](https://archive.blender.org/developer/F564753/screen.png)

Ray molenkamp commented

2017-04-21 22:42:21 +02:00

Added subscriber: @LazyDodo

Ray molenkamp commented

2017-04-21 22:42:21 +02:00

In #51262#429683, @dr.sybren wrote:
Then attach the crashing file to this ticket, otherwise we can't investigate the issue.

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

> In #51262#429683, @dr.sybren wrote: > Then attach the crashing file to this ticket, otherwise we can't investigate the issue. 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*

Sybren A. Stüvel commented

2017-04-25 11:34:43 +02:00

Thanks for catching this @LazyDodo. Indeed, Asan picked it up too.

blender-admin commented

2017-04-25 12:05:55 +02:00

This issue was referenced by 3128600a8a

This issue was referenced by 3128600a8ab2badd9ea39c80133f15f766794ec6

Sybren A. Stüvel commented

2017-04-25 12:08:25 +02:00

Changed status from 'Open' to: 'Resolved'

Sybren A. Stüvel closed this issue

2017-04-25 12:08:25 +02:00

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Blender CRASH with alembic file #51262