Commit 2195b755 authored by Kent Overstreet's avatar Kent Overstreet
Browse files

bcachefs: Fix unsafety in bch2_dirent_name_bytes() 



Reported-by: default avatar <syzbot+84fa6fb8c7f98b93cdea@syzkaller.appspotmail.com>
Signed-off-by: default avatarKent Overstreet <kent.overstreet@linux.dev>
parent 2ba24864

fs/bcachefs/dirent.c

+3 −0
Original line number Diff line number Diff line
@@ -15,6 +15,9 @@ 


static unsigned bch2_dirent_name_bytes(struct bkey_s_c_dirent d)

{

	if (bkey_val_bytes(d.k) < offsetof(struct bch_dirent, d_name))

		return 0;



	unsigned bkey_u64s = bkey_val_u64s(d.k);

	unsigned bkey_bytes = bkey_u64s * sizeof(u64);

	u64 last_u64 = ((u64*)d.v)[bkey_u64s - 1];