From f108ddd467b5cad84a6d93cdd0a251ba47ceaccb Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Sun, 19 May 2024 17:08:15 -0400 Subject: bcachefs: Fix shift overflow in btree_lost_data() Reported-by: syzbot+29f65db1a5fe427b5c56@syzkaller.appspotmail.com Fixes: 55936afe1107 ("bcachefs: Flag btrees with missing data") Signed-off-by: Kent Overstreet --- fs/bcachefs/bcachefs_format.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'fs/bcachefs/bcachefs_format.h') diff --git a/fs/bcachefs/bcachefs_format.h b/fs/bcachefs/bcachefs_format.h index 1bebba881d89..d801e19cb489 100644 --- a/fs/bcachefs/bcachefs_format.h +++ b/fs/bcachefs/bcachefs_format.h @@ -1555,6 +1555,12 @@ enum btree_id { BTREE_ID_NR }; +/* + * Maximum number of btrees that we will _ever_ have under the current scheme, + * where we refer to them with bitfields + */ +#define BTREE_ID_NR_MAX 64 + static inline bool btree_id_is_alloc(enum btree_id id) { switch (id) { -- cgit v1.2.3