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mm/filemap: return early if failed to allocate memory for split

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commit de60fd8dde upstream.

xas_split_alloc could fail with NOMEM, and in such case, it should abort
early instead of keep going and fail the xas_split below.

Link: https://lkml.kernel.org/r/20240416071722.45997-1-ryncsn@gmail.com
Link: https://lkml.kernel.org/r/20240415171857.19244-1-ryncsn@gmail.com
Link: https://lkml.kernel.org/r/20240415171857.19244-2-ryncsn@gmail.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Acked-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stable-dep-of: 6758c1128c ("mm/filemap: optimize filemap folio adding")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kairui Song 2024-10-02 05:06:23 +08:00 committed by Greg Kroah-Hartman
parent 4d0261cea4
commit ff3c557fa9
1 changed files with 4 additions and 1 deletions
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5
mm/filemap.c
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@ -872,9 +872,12 @@ noinline int __filemap_add_folio(struct address_space *mapping,
unsigned int order = xa_get_order(xas.xa, xas.xa_index); unsigned int order = xa_get_order(xas.xa, xas.xa_index);
void *entry, *old = NULL; void *entry, *old = NULL;
if (order > folio_order(folio)) if (order > folio_order(folio)) {
xas_split_alloc(&xas, xa_load(xas.xa, xas.xa_index), xas_split_alloc(&xas, xa_load(xas.xa, xas.xa_index),
order, gfp); order, gfp);
if (xas_error(&xas))
goto error;
}
xas_lock_irq(&xas); xas_lock_irq(&xas);
xas_for_each_conflict(&xas, entry) { xas_for_each_conflict(&xas, entry) {
old = entry; old = entry;