Re: [PATCH 6.1.y] block: make bio_check_eod work for zero sized devices

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected.
No action required from the submitter.

The upstream commit SHA1 provided is correct: 3eb96946f0be6bf447cbdf219aba22bc42672f92

WARNING: Author mismatch between patch and upstream commit:
Backport author: <miguelgarciaroman8@gmail.com>
Commit author: Christoph Hellwig<hch@lst.de>

Status in newer kernel trees:
6.14.y | Present (exact SHA1)
6.13.y | Present (exact SHA1)
6.12.y | Present (exact SHA1)
6.6.y | Present (exact SHA1)

Note: The patch differs from the upstream commit:
---
1:  3eb96946f0be6 ! 1:  6a6f180aae691 block: make bio_check_eod work for zero sized devices
    @@ Metadata
      ## Commit message ##
         block: make bio_check_eod work for zero sized devices
     
    +    commit 3eb96946f0be6bf447cbdf219aba22bc42672f92 upstream.
    +
    +    This patch is a backport.
    +
         Since the dawn of time bio_check_eod has a check for a non-zero size of
         the device.  This doesn't really make any sense as we never want to send
         I/O to a device that's been set to zero size, or never moved out of that.
    @@ Commit message
         the issue really goes back way before git history.
     
         Fixes: 9fe95babc742 ("zram: remove valid_io_request")
    -    Reported-by: syzbot+b8d61a58b7c7ebd2c8e0@syzkaller.appspotmail.com
    +    Reported-by: syzbot+2aca91e1d3ae43aef10c@syzkaller.appspotmail.com
    +    Bug: https://syzkaller.appspot.com/bug?extid=2aca91e1d3ae43aef10c
         Signed-off-by: Christoph Hellwig <hch@lst.de>
         Link: https://lore.kernel.org/r/20230524060538.1593686-1-hch@lst.de
         Signed-off-by: Jens Axboe <axboe@kernel.dk>
    +    (cherry picked from commit 3eb96946f0be6bf447cbdf219aba22bc42672f92)
    +    Signed-off-by: Miguel García <miguelgarciaroman8@gmail.com>
     
      ## block/blk-core.c ##
     @@ block/blk-core.c: static inline int bio_check_eod(struct bio *bio)
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.1.y        |  Success    |  Success   |