Commit c1bd21bb authored by Kent Overstreet's avatar Kent Overstreet
Browse files

bcachefs: Fix invalid shift in member_to_text() 



Reported-by: default avatar <syzbot+064ce437a1ad63d3f6ef@syzkaller.appspotmail.com>
Signed-off-by: default avatarKent Overstreet <kent.overstreet@linux.dev>
parent 7d84d9f4

fs/bcachefs/sb-members.c

+9 −1
Original line number Diff line number Diff line
@@ -163,6 +163,11 @@ static int validate_member(struct printbuf *err, 
		return -BCH_ERR_invalid_sb_members;

	}



	if (m.btree_bitmap_shift >= 64) {

		prt_printf(err, "device %u: invalid btree_bitmap_shift %u", i, m.btree_bitmap_shift);

		return -BCH_ERR_invalid_sb_members;

	}



	return 0;

}
@@ -247,7 +252,10 @@ static void member_to_text(struct printbuf *out, 
	prt_newline(out);



	prt_printf(out, "Btree allocated bitmap blocksize:\t");

	if (m.btree_bitmap_shift < 64)

		prt_units_u64(out, 1ULL << m.btree_bitmap_shift);

	else

		prt_printf(out, "(invalid shift %u)", m.btree_bitmap_shift);

	prt_newline(out);



	prt_printf(out, "Btree allocated bitmap:\t");