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f2fs: Zero f2fs_folio_state on allocation

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f2fs_folio_state is attached to folio->private and is expected to start
with read_pages_pending == 0.  However, the structure was allocated from
ffs_entry_slab without being fully initialized, which can leave
read_pages_pending with stale values.

Allocate the object with __GFP_ZERO so all fields are reliably zeroed at
creation time.

Signed-off-by: Nanzhe Zhao <nzzhao@126.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Nanzhe Zhao 2026-01-05 23:30:57 +08:00 committed by Jaegeuk Kim
parent d36de29f4b
commit 00feea1dfc
1 changed files with 2 additions and 1 deletions
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3
fs/f2fs/data.c
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@ -2399,7 +2399,8 @@ static struct f2fs_folio_state *ffs_find_or_alloc(struct folio *folio)
if (ffs)
return ffs;
ffs = f2fs_kmem_cache_alloc(ffs_entry_slab, GFP_NOIO, true, NULL);
ffs = f2fs_kmem_cache_alloc(ffs_entry_slab,
GFP_NOIO | __GFP_ZERO, true, NULL);
spin_lock_init(&ffs->state_lock);
folio_attach_private(folio, ffs);