From 1b1f8623fbdcc0fc2ea1c087e146f77e30e94b1b Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Thu, 28 Nov 2024 17:57:55 -0500 Subject: [PATCH 144/213] bcachefs: cryptographic MACs on superblock are not (yet?) supported Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit We should add support for cryptographic macs on the superblock - and it won't be hard, but it'll need an incompatible feature bit (and we have a new incompatible feature versioning scheme coming). For now, just add a guard to avoid a dull ptr deref in gen_poly_key(). Reported-by: syzbot+dd3d9835055dacb66f35@syzkaller.appspotmail.com Signed-off-by: Kent Overstreet Signed-off-by: Alexander Miroshnichenko --- fs/bcachefs/super-io.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/bcachefs/super-io.c b/fs/bcachefs/super-io.c index 4c29f8215d54..6a086c1c4b14 100644 --- a/fs/bcachefs/super-io.c +++ b/fs/bcachefs/super-io.c @@ -677,7 +677,8 @@ static int read_one_super(struct bch_sb_handle *sb, u64 offset, struct printbuf } enum bch_csum_type csum_type = BCH_SB_CSUM_TYPE(sb->sb); - if (csum_type >= BCH_CSUM_NR) { + if (csum_type >= BCH_CSUM_NR || + bch2_csum_type_is_encryption(csum_type)) { prt_printf(err, "unknown checksum type %llu", BCH_SB_CSUM_TYPE(sb->sb)); return -BCH_ERR_invalid_sb_csum_type; } -- 2.45.2