Re: [PATCH 5.10.y] block: add overflow checks for Amiga partition support

[Greg KH <greg@kroah.com>]

On Sun, Jul 16, 2023 at 11:28:20AM +1200, Michael Schmitz wrote:
> The Amiga partition parser module uses signed int for partition sector
> address and count, which will overflow for disks larger than 1 TB.
> 
> Use u64 as type for sector address and size to allow using disks up to
> 2 TB without LBD support, and disks larger than 2 TB with LBD. The RBD
> format allows to specify disk sizes up to 2^128 bytes (though native
> OS limitations reduce this somewhat, to max 2^68 bytes), so check for
> u64 overflow carefully to protect against overflowing sector_t.
> 
> Bail out if sector addresses overflow 32 bits on kernels without LBD
> support.
> 
> This bug was reported originally in 2012, and the fix was created by
> the RDB author, Joanne Dow <jdow@earthlink.net>. A patch had been
> discussed and reviewed on linux-m68k at that time but never officially
> submitted (now resubmitted as patch 1 in this series).
> This patch adds additional error checking and warning messages.
> 
> Reported-by: Martin Steigerwald <Martin@lichtvoll.de>
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=43511
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Message-ID: <201206192146.09327.Martin@lichtvoll.de>
> Cc: <stable@vger.kernel.org> # 5.2
> Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Christoph Hellwig <hch@infradead.org>
> Link: https://lore.kernel.org/r/20230620201725.7020-4-schmitzmic@gmail.com
> Signed-off-by: Jens Axboe <axboe@kernel.dk>
> (cherry picked from commit b6f3f28f604ba3de4724ad82bea6adb1300c0b5f)
> Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
> 
> ---
> 
> Changes since 5.10-stable:
> 
> - fix merge conflicts
> ---

All now queued up, thanks.

greg k-h