Re: [PATCH] rtmutex.c: Fix incorrect waiter check

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On Mon, 17 Aug 2015 12:41:47 +0200
eg Engleder Gerhard <eg@xxxxxxxx> wrote:

> Hello Steven,
> 
> I had the following problem with 3.2.68-rt99:
> <1>[ 1615.388250] BUG: unable to handle kernel NULL pointer dereference at 0000002d
> <1>[ 1615.388261] IP: [<c106d006>] task_blocks_on_rt_mutex+0x126/0x240
> 
> We could reproduce it rather good, 2 times BUG out of 4 tries. Sebastian pointed
> me to the patch below. 8 times no BUG out of 8 tries with the patch now. As Sebastian
> is not available currently, I thought I should let you know. Could you add this patch
> to 3.2.69-rt102?
> 

Yes, I'm the one to apply it to 3.2-rt, as Sebastian is responsible for
the development branch and I'm responsible for the stable tree.

I'm currently at LinuxCon, but I'll see if I can get this done sometime
while I watch the key notes. That's usually when I get the most work
done during a conference ;-)

-- Steve
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