[PATCH v2 0/1] iomap: fix readahead folio refcounting race

[Joanne Koong <joannelkoong@gmail.com>]

This patch is on top of Christian's vfs.fixes tree.

This fixes a race for readahead folios that was introduced by commit
b2f35ac4146d ("iomap: add caller-provided callbacks for read and readahead").

The change in the patch was sanity-tested on fuse and xfs (with large folios
disabled) by running generic/112 for both readahead and read_folio (simulated
by commenting out the ->readahead() callback).

Changelog
---------
v1: https://lore.kernel.org/linux-fsdevel/20260114180255.3043081-1-joannelkoong@gmail.com/
* Invalidate ctx->cur_folio instead of retaining readahead caller refcount (Matthew)

Joanne Koong (1):
  iomap: fix readahead folio refcounting race

 fs/iomap/buffered-io.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

-- 
2.47.3