Re: [stable request] ext4: fix fencepost in s_first_meta_bg validation

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On Thu, Mar 23, 2017 at 03:07:16PM +0100, Jiri Slaby wrote:
> Hi,
> 
> can we have:
> commit 2ba3e6e8afc9b6188b471f27cf2b5e3cf34e7af2
> Author: Theodore Ts'o <tytso@xxxxxxx>
> Date:   Wed Feb 15 01:26:39 2017 -0500
> 
>     ext4: fix fencepost in s_first_meta_bg validation
> 
> 
> in stable trees wherever 3a4b77cd47bb837b8557595ec7425f281f2ca1fe (ext4:
> validate s_first_meta_bg at mount time) was applied? It fixes its
> fallout as was reported by IBM to our bugzilla:
> EXT4-fs (dm-0): mounting ext3 file system using the ext4 subsystem
> EXT4-fs (dm-0): first meta block group too large: 1 (group descriptor
> block count 1)
> <8D>FAILED<D9> Failed to mount /sysroot/usr.
> 
> 3.12 already has the patch as of 3.12.71.

Added to 4.4 and 4.9-stable trees, thanks for catching this.

greg k-h



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