[haiku-bugs] Re: [Haiku] #11452: Race condition in BPopUpMenu leads to KDL
- From: "pulkomandy" <trac@xxxxxxxxxxxx>
- Date: Tue, 11 Nov 2014 17:26:36 -0000
#11452: Race condition in BPopUpMenu leads to KDL
--------------------------+----------------------------
Reporter: pulkomandy | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: - General | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
--------------------------+----------------------------
Description changed by pulkomandy:
Old description:
> This may not be easy to trigger...
>
> We are supposed to only allow one popup menu on a given view at a time.
> This doesn't work perfectly however and I often manage to open two menus
> in Tracker: the desktop one and the specific menu for a given icon (you
> have to be fast to do this - right click on the desktop and then on the
> icon a short time after that, but before the first menu is open).
>
> Usually this is harmless and only leads to the two menus opening. But
> today I went to KDL.
>
> {{{
> PANIC: vm_page_fault: unhandled page fault in kernel space at 0x706f78,
> ip 0x80084ba2
> }}}
>
> The panic is in wait_for_thread_etc, called by BPopUpMenu::_Go. It seems
> that it's trying to access invalid thread data.
New description:
This may not be easy to trigger...
We are supposed to only allow one popup menu on a given view at a time.
This doesn't work perfectly however and I often manage to open two menus
in Tracker: the desktop one and the specific menu for a given icon (you
have to be fast to do this - right click on the desktop and then on the
icon a short time after that, but before the first menu is open).
Usually this is harmless and only leads to the two menus opening. But
today I went to KDL.
{{{
PANIC: vm_page_fault: unhandled page fault in kernel space at 0x706f78, ip
0x80084ba2
}}}
The panic is in wait_for_thread_etc, called by BPopUpMenu::_Go. It seems
that it's trying to access invalid thread data.
I should note that I was trying to replicate the CDDA panics/corruption,
so that may be the actual problem...
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Ticket URL: <https://dev.haiku-os.org/ticket/11452#comment:1>
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