Re: [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in bch2_stripe_to_text

[Zhao Mengmeng]

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1ec6d097897adiff --git a/fs/bcachefs/ec.c b/fs/bcachefs/ec.c
index 141a4c63142f..c717d80fdfd6 100644
--- a/fs/bcachefs/ec.c
+++ b/fs/bcachefs/ec.c
@@ -144,7 +144,8 @@ void bch2_stripe_to_text(struct printbuf *out, struct bch_fs *c,
 		   nr_data,
 		   s.nr_redundant);
 	bch2_prt_csum_type(out, s.csum_type);
-	prt_printf(out, " gran %u", 1U << s.csum_granularity_bits);
+	prt_printf(out, " gran bit %u, max gran bit %u",
+		   s.csum_granularity_bits, U8_MAX);
 
 	for (unsigned i = 0; i < s.nr_blocks; i++) {
 		const struct bch_extent_ptr *ptr = sp->ptrs + i;