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bcachefs: fix invalid memory access in bch2_fs_alloc() error path

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When bch2_fs_alloc() gets an error before calling
bch2_fs_btree_iter_init(), bch2_fs_btree_iter_exit() makes an invalid
memory access because btree_trans_list is uninitialized.

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Fixes: 6bd68ec266 ("bcachefs: Heap allocate btree_trans")
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Thomas Bertschinger 2023-12-14 12:06:41 -07:00 committed by Kent Overstreet
parent 8bf771972b
commit 50a8a732d2
3 changed files with 8 additions and 2 deletions
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8
fs/bcachefs/btree_iter.c
View file

@ -3214,10 +3214,9 @@ void bch2_fs_btree_iter_exit(struct bch_fs *c)
mempool_exit(&c->btree_trans_pool);
}
int bch2_fs_btree_iter_init(struct bch_fs *c)
void bch2_fs_btree_iter_init_early(struct bch_fs *c)
{
struct btree_transaction_stats *s;
int ret;
for (s = c->btree_transaction_stats;
s < c->btree_transaction_stats + ARRAY_SIZE(c->btree_transaction_stats);
@ -3228,6 +3227,11 @@ int bch2_fs_btree_iter_init(struct bch_fs *c)
INIT_LIST_HEAD(&c->btree_trans_list);
seqmutex_init(&c->btree_trans_lock);
}
int bch2_fs_btree_iter_init(struct bch_fs *c)
{
int ret;
c->btree_trans_bufs = alloc_percpu(struct btree_trans_buf);
if (!c->btree_trans_bufs)

1
fs/bcachefs/btree_iter.h
View file

@ -938,6 +938,7 @@ unsigned bch2_trans_get_fn_idx(const char *);
void bch2_btree_trans_to_text(struct printbuf *, struct btree_trans *);
void bch2_fs_btree_iter_exit(struct bch_fs *);
void bch2_fs_btree_iter_init_early(struct bch_fs *);
int bch2_fs_btree_iter_init(struct bch_fs *);
#endif /* _BCACHEFS_BTREE_ITER_H */

1
fs/bcachefs/super.c
View file

@ -714,6 +714,7 @@ static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts)
bch2_fs_copygc_init(c);
bch2_fs_btree_key_cache_init_early(&c->btree_key_cache);
bch2_fs_btree_iter_init_early(c);
bch2_fs_btree_interior_update_init_early(c);
bch2_fs_allocator_background_init(c);
bch2_fs_allocator_foreground_init(c);