From 9482f3b05332a624508a91c2ab2cf3527328a6a4 Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Fri, 16 Aug 2024 12:41:46 -0400 Subject: bcachefs: avoid overflowing LRU_TIME_BITS for cached data lru Reported-by: syzbot+510b0b28f8e6de64d307@syzkaller.appspotmail.com Signed-off-by: Kent Overstreet --- fs/bcachefs/alloc_background.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/bcachefs/alloc_background.h b/fs/bcachefs/alloc_background.h index 260e7fa83d05..fd790b03fbe1 100644 --- a/fs/bcachefs/alloc_background.h +++ b/fs/bcachefs/alloc_background.h @@ -150,7 +150,9 @@ static inline void alloc_data_type_set(struct bch_alloc_v4 *a, enum bch_data_typ static inline u64 alloc_lru_idx_read(struct bch_alloc_v4 a) { - return a.data_type == BCH_DATA_cached ? a.io_time[READ] : 0; + return a.data_type == BCH_DATA_cached + ? a.io_time[READ] & LRU_TIME_MAX + : 0; } #define DATA_TYPES_MOVABLE \ -- cgit v1.2.3-58-ga151