988489 - hangs when cache file is deleted (by Symantec Endpoint Protection)

Status: RESOLVED WORKSFORME

(Core :: Networking: Cache, defect)

Description

[Wayne Mery (:wsmwk)]

Attachment: windbg stacktrace mozjs!js::jit::NameIC::update

hangs every time 31.0a1 (2014-03-20) build

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CDAQFjAB&url=https%3A%2F%2Fwww.vmware.com%2Fsupport%2Fvsphere5%2Fdoc%2Fvsphere-esx-vcenter-server-51-release-notes.html&ei=cQMzU_n7OsPjsASFtIL4Aw&usg=AFQjCNHj3fjQf_wVl3RzNROGyzHYUsJ6NQ&sig2=1h6eivfeOcpXjEUkIXDXQQ

Comment 1

[Wayne Mery (:wsmwk)]

Attachment: windbg stacktrace js::jit::DoTypeMonitorFallback

the page load doesn't fail in IE

Next, will try more recent nightly build

Comment 2

[Wayne Mery (:wsmwk)]

Symantec Endpoint is catching what it thinks is badness in cache and deleting cache file(s).

Scan type: Auto-Protect Scan
Event: Risk Found!
Security risk detected: IFrame.Exploit
File: C:\Users\wsm0.AD\AppData\Local\Mozilla\Firefox\Profiles\a3cv86if.default\cache2\entries\EF7B476F3146C47258EB07A69305843B106A7405
Location: C:\Users\wsm0.AD\AppData\Local\Mozilla\Firefox\Profiles\a3cv86if.default\cache2\entries
Computer: WSM0-I7
User: wsm0
Action taken: Pending Side Effects Analysis : Access denied
Date found: Wednesday, March 26, 2014  3:16:20 PM


link resolves to https://www.vmware.com/support/vsphere5/doc/vsphere-esx-vcenter-server-51-release-notes.html

Comment 3

[Wayne Mery (:wsmwk)]

followed by 
Security Risk Found!IFrame.Exploit in File: C:\Users\wsm0.AD\AppData\Local\Mozilla\Firefox\Profiles\a3cv86if.default\cache2\entries\EF7B476F3146C47258EB07A69305843B106A7405 by: Auto-Protect scan.  Action: Cleaned by Deletion.  Action Description: The file was deleted successfully.

Comment 4

[Chris Peterson [:cpeterson]]

Wayne: if you disable Symantec Endpoint Protection, can you load the page? Is this a regression in Nightly 31?

Comment 5

[Wayne Mery (:wsmwk)]

(In reply to Chris Peterson (:cpeterson) from comment #4)
> Wayne: if you disable Symantec Endpoint Protection, can you load the page?

Yes. I excluded the cache directory from Norton scanning and the problem went away.

> Is this a regression in Nightly 31?

I have no data to say it is a regression or not. Nor have I checked any other builds or releases.  If needed, I will do so

Perhaps related to that ... my question is should firefox not crash if a cache file is unexpectedly missing?

Comment 6

[Wayne Mery (:wsmwk)]

if a cache file is unexpectedly missing, what should be expected behavior?

Comment 7

[Michal Novotny [:michal]]

Expected behavior is to load the resource from the network, but right now there is a bug and such resource fails to load. Bug 913812 should fix this.

Anyway, I don't understand what exactly happens in your case. Application really should not hang and I don't see any hang in the stack traces. In comment #5, you write something about crash, so I'm confused. Btw. did you turn on the new cache backend manually?

Comment 8

[Michal Novotny [:michal]]

I've reproduced it locally and the code asserts in mozilla::net::CacheFileChunk::BufForReading().

Comment 9

[Wayne Mery (:wsmwk)]

(In reply to Michal Novotny (:michal) from comment #7)
> Anyway, I don't understand what exactly happens in your case. Application
> really should not hang and I don't see any hang in the stack traces. In
> comment #5, you write something about crash, so I'm confused. 
My mistake - replace all references to crash with the word "hang"

> did you turn on the new cache backend manually?
yes

Comment 10

[Honza Bambas (:mayhemer)]

Tracking for enable, hang seems serious.

Comment 11

[Honza Bambas (:mayhemer)]

Wayne, any news here?  We are soon going to enable by default.  If this is no longer a problem or is just occasional I will close or postpone.

Comment 12

[Wayne Mery (:wsmwk)]

I'll give an update on Tuesday - I'll have to update my work PC and re-enable scanning, plus I'm not in work much the next few days.

Comment 13

[Wayne Mery (:wsmwk)]

I won't get to this til later in week

Comment 14

[Honza Bambas (:mayhemer)]

Wayne, I'll take the liberty to assign this to you to confirm the bug is there or is fixed.  Thanks.

Comment 15

[Wayne Mery (:wsmwk)]

Honza, Michal, thanks for the fixes.
Something changed such that symantec scan didn't delete cache files. But using current nightly I couldn't cause this by randomly and also massively deleting cache files. 
WFM