From: Boris Burkov <boris@bur.io>
To: Goldwyn Rodrigues <rgoldwyn@suse.de>
Cc: linux-btrfs@vger.kernel.org, Goldwyn Rodrigues <rgoldwyn@suse.com>
Subject: Re: [PATCH 03/21] btrfs: Add start < end check in btrfs_debug_check_extent_io_range()
Date: Wed, 8 Mar 2023 11:29:39 -0800 [thread overview]
Message-ID: <20230308192939.GD30177@zen> (raw)
In-Reply-To: <37fd374e88730196100116cc237f637cd6a8962a.1677793433.git.rgoldwyn@suse.com>
On Thu, Mar 02, 2023 at 04:24:48PM -0600, Goldwyn Rodrigues wrote:
> From: Goldwyn Rodrigues <rgoldwyn@suse.com>
>
> For issues such as zero size writes, we can get start > end. Check them
> in btrfs_debug_check_extent_io_range() so this may be caught early.
>
> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Boris Burkov <boris@bur.io>
> ---
> fs/btrfs/extent-io-tree.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/extent-io-tree.c b/fs/btrfs/extent-io-tree.c
> index 482721dd1eba..d467c614c84e 100644
> --- a/fs/btrfs/extent-io-tree.c
> +++ b/fs/btrfs/extent-io-tree.c
> @@ -65,7 +65,8 @@ static inline void __btrfs_debug_check_extent_io_range(const char *caller,
> return;
>
> isize = i_size_read(&inode->vfs_inode);
> - if (end >= PAGE_SIZE && (end % 2) == 0 && end != isize - 1) {
> + if ((start > end) ||
> + (end >= PAGE_SIZE && (end % 2) == 0 && end != isize - 1)) {
> btrfs_debug_rl(inode->root->fs_info,
> "%s: ino %llu isize %llu odd range [%llu,%llu]",
> caller, btrfs_ino(inode), isize, start, end);
> --
> 2.39.2
>
next prev parent reply other threads:[~2023-03-08 19:29 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1677793433.git.rgoldwyn@suse.com>
2023-03-02 22:24 ` [PATCH 01/21] fs: readahead_begin() to call before locking folio Goldwyn Rodrigues
2023-03-06 16:53 ` Christoph Hellwig
2023-03-02 22:24 ` [PATCH 02/21] btrfs: add WARN_ON() on incorrect lock range Goldwyn Rodrigues
2023-03-08 19:28 ` Boris Burkov
2023-03-02 22:24 ` [PATCH 03/21] btrfs: Add start < end check in btrfs_debug_check_extent_io_range() Goldwyn Rodrigues
2023-03-08 19:29 ` Boris Burkov [this message]
2023-03-02 22:24 ` [PATCH 04/21] btrfs: make btrfs_qgroup_flush() non-static Goldwyn Rodrigues
2023-03-02 22:24 ` [PATCH 05/21] btrfs: Lock extents before pages for buffered write() Goldwyn Rodrigues
2023-03-02 22:24 ` [PATCH 06/21] btrfs: wait ordered range before locking during truncate Goldwyn Rodrigues
2023-03-07 17:03 ` Christoph Hellwig
2023-03-02 22:24 ` [PATCH 07/21] btrfs: lock extents while truncating Goldwyn Rodrigues
2023-03-02 22:24 ` [PATCH 08/21] btrfs: no need to lock extent while performing invalidate_folio() Goldwyn Rodrigues
2023-03-02 22:24 ` [PATCH 09/21] btrfs: lock extents before folio for read()s Goldwyn Rodrigues
2023-03-02 22:24 ` [PATCH 10/21] btrfs: lock extents before pages in writepages Goldwyn Rodrigues
2023-03-02 22:24 ` [PATCH 11/21] btrfs: locking extents for async writeback Goldwyn Rodrigues
2023-03-08 19:13 ` Boris Burkov
2023-03-02 22:24 ` [PATCH 12/21] btrfs: lock extents before pages - defrag Goldwyn Rodrigues
2023-03-02 22:24 ` [PATCH 13/21] btrfs: Perform memory faults under locked extent Goldwyn Rodrigues
2023-03-02 22:24 ` [PATCH 14/21] btrfs: writepage fixup lock rearrangement Goldwyn Rodrigues
2023-03-02 22:25 ` [PATCH 15/21] btrfs: lock extent before pages for encoded read ioctls Goldwyn Rodrigues
2023-03-02 22:25 ` [PATCH 16/21] btrfs: lock extent before pages in encoded write Goldwyn Rodrigues
2023-03-02 22:25 ` [PATCH 17/21] btrfs: btree_writepages lock extents before pages Goldwyn Rodrigues
2023-03-02 22:25 ` [PATCH 18/21] btrfs: check if writeback pages exist before starting writeback Goldwyn Rodrigues
2023-03-02 22:25 ` [PATCH 19/21] btrfs: lock extents before pages in relocation Goldwyn Rodrigues
2023-03-02 22:25 ` [PATCH 20/21] btrfs: Add inode->i_count instead of calling ihold() Goldwyn Rodrigues
2023-03-07 17:06 ` Christoph Hellwig
2023-03-08 23:03 ` Goldwyn Rodrigues
2023-03-09 9:14 ` Christoph Hellwig
2023-03-11 3:52 ` Goldwyn Rodrigues
2023-03-02 22:25 ` [PATCH 21/21] btrfs: debug extent locking Goldwyn Rodrigues
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