On Fri, Sep 08, 2017 at 05:48:55PM +0900, Naohiro Aota wrote:
> btrfs_cmp_data_prepare() (almost) always returns 0 i.e. ignoring errors
> from gather_extent_pages(). While the pages are freed by
> btrfs_cmp_data_free(), cmp->num_pages still has > 0. Then,
> btrfs_extent_same() try to access the already freed pages causing faults
> (or violates PageLocked assertion).
>
> This patch just return the error as is so that the caller stop the process.
>
> Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx>
> Fixes: f441460202cb ("btrfs: fix deadlock with extent-same and readpage")
> Cc: <stable@xxxxxxxxxxxxxxx> # 4.2
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
