Re: [PATCH] Btrfs: fix crash/invalid memory access on fsync when using overlayfs

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On Mon, Mar 21, 2016 at 01:51:07PM -0400, Chris Mason wrote:
> On Mon, Mar 21, 2016 at 05:38:44PM +0000, fdmanana@xxxxxxxxxx wrote:
> > From: Filipe Manana <fdmanana@xxxxxxxx>
> > 
> > If the lower or upper directory of an overlayfs mount belong to a btrfs
> > file system and we fsync the file through the overlayfs' merged directory
> > we ended up accessing an inode that didn't belong to btrfs as if it were
> > a btrfs inode at btrfs_sync_file() resulting in a crash like the following:
> 
> Thanks Filipe, I'll put this in a second pull this week, even if its the
> only patch in it ;)

I can send you more that I consider relevant for 4.6, low-risk subset of
what's in the misc-4.6 branch.
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