The patch titled
Subject: fsdax-dax_unshare_iter-should-return-a-valid-length-fix
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
fsdax-dax_unshare_iter-should-return-a-valid-length-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/fsdax-dax_unshare_iter-should-return-a-valid-length-fix.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: fsdax-dax_unshare_iter-should-return-a-valid-length-fix
Date: Thu Feb 2 04:15:00 PM PST 2023
don't mess up `ret', per Matthew
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Darrick J. Wong <djwong@xxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/fs/dax.c~fsdax-dax_unshare_iter-should-return-a-valid-length-fix
+++ a/fs/dax.c
@@ -1271,10 +1271,10 @@ static s64 dax_unshare_iter(struct iomap
if (ret < 0)
goto out_unlock;
- ret = copy_mc_to_kernel(daddr, saddr, length);
- if (ret)
+ if (copy_mc_to_kernel(daddr, saddr, length) == 0)
+ ret = length;
+ else
ret = -EIO;
- ret = length;
out_unlock:
dax_read_unlock(id);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
fsdax-dax_unshare_iter-should-return-a-valid-length-fix.patch
mm-add-folio_add_new_anon_rmap-fix.patch
mm-remove-page_evictable-fix.patch
mm-remove-the-swap_readpage-return-value-fix.patch
block-remove-rw_page-fix.patch
mm-add-memcpy_from_file_folio-fix.patch
mm-replace-vma-vm_flags-direct-modifications-with-modifier-calls-fix.patch
kasan-infer-allocation-size-by-scanning-metadata-fix.patch
error-injection-remove-ei_etype_none-fix.patch
hfsplus-remove-unnecessary-variable-initialization-fix.patch
scripts-gdb-add-mm-introspection-utils-fix.patch
lib-stackdepot-mm-rename-stack_depot_want_early_init-fix.patch
lib-stackdepot-annotate-racy-slab_index-accesses-fix.patch
