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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-07-09 23:43:01 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-07-10 19:46:22 +0300 |
| commit | 6f692b1672bdd279832a1c5227afb58fbbfbd0be (patch) | |
| tree | 6b247d1526a98f802f4f1f171f8ea6350017b4e7 /fs | |
| parent | 7d7f71cd8763a296d02dff9514447aa3de199c47 (diff) | |
| download | linux-6f692b1672bdd279832a1c5227afb58fbbfbd0be.tar.xz | |
bcachefs: Fix RCU splat
Reported-by: syzbot+e74fea078710bbca6f4b@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/bcachefs/buckets.c | 2 | ||||
| -rw-r--r-- | fs/bcachefs/buckets.h | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/fs/bcachefs/buckets.c b/fs/bcachefs/buckets.c index 743d57eba760..314ee3e0187f 100644 --- a/fs/bcachefs/buckets.c +++ b/fs/bcachefs/buckets.c @@ -805,7 +805,7 @@ int bch2_bucket_ref_update(struct btree_trans *trans, struct bch_dev *ca, "bucket %u:%zu gen %u (mem gen %u) data type %s: stale dirty ptr (gen %u)\n" "while marking %s", ptr->dev, bucket_nr, b_gen, - *bucket_gen(ca, bucket_nr), + bucket_gen_get(ca, bucket_nr), bch2_data_type_str(bucket_data_type ?: ptr_data_type), ptr->gen, (printbuf_reset(&buf), diff --git a/fs/bcachefs/buckets.h b/fs/bcachefs/buckets.h index 80ee0be9793e..8ad4be73860c 100644 --- a/fs/bcachefs/buckets.h +++ b/fs/bcachefs/buckets.h @@ -116,6 +116,14 @@ static inline u8 *bucket_gen(struct bch_dev *ca, size_t b) return gens->b + b; } +static inline u8 bucket_gen_get(struct bch_dev *ca, size_t b) +{ + rcu_read_lock(); + u8 gen = *bucket_gen(ca, b); + rcu_read_unlock(); + return gen; +} + static inline size_t PTR_BUCKET_NR(const struct bch_dev *ca, const struct bch_extent_ptr *ptr) { |