The patch titled Subject: maple_tree: fix mas_alloc_cyclic() second search has been added to the -mm mm-hotfixes-unstable branch. Its filename is maple_tree-reload-mas-before-the-second-call-for-mas_empty_area-fix.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

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: "Liam R. Howlett" Liam.Howlett@Oracle.com Subject: maple_tree: fix mas_alloc_cyclic() second search Date: Mon, 16 Dec 2024 14:01:12 -0500

The first search may leave the maple state in an error state. Reset the maple state before the second search so that the search has a chance of executing correctly after an exhausted first search.

Link: https://lore.kernel.org/all/20241216060600.287B4C4CED0@smtp.kernel.org/ Link: https://lkml.kernel.org/r/20241216190113.1226145-2-Liam.Howlett@oracle.com Fixes: 9b6713cc7522 ("maple_tree: Add mtree_alloc_cyclic()") Signed-off-by: Liam R. Howlett Liam.Howlett@Oracle.com Reviewed-by: Yang Erkun yangerkun@huawei.com Cc: Christian Brauner brauner@kernel.org Cc: Chuck Lever chuck.lever@oracle.com says: Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

lib/maple_tree.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/lib/maple_tree.c~maple_tree-reload-mas-before-the-second-call-for-mas_empty_area-fix +++ a/lib/maple_tree.c @@ -4346,7 +4346,6 @@ int mas_alloc_cyclic(struct ma_state *ma { unsigned long min = range_lo; int ret = 0; - struct ma_state m = *mas;

range_lo = max(min, *next); ret = mas_empty_area(mas, range_lo, range_hi, 1); @@ -4355,7 +4354,7 @@ int mas_alloc_cyclic(struct ma_state *ma ret = 1; } if (ret < 0 && range_lo > min) { - *mas = m; + mas_reset(mas); ret = mas_empty_area(mas, min, range_hi, 1); if (ret == 0) ret = 1; _

Patches currently in -mm which might be from Liam.Howlett@Oracle.com are

maple_tree-reload-mas-before-the-second-call-for-mas_empty_area-fix.patch test_maple_tree-test-exhausted-upper-limit-of-mtree_alloc_cyclic.patch