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bcachefs: Switch to unsafe_memcpy() in a few places

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The new fortify checking doesn't work for us in all places; this
switches to unsafe_memcpy() where appropriate to silence a few
warnings/errors.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2023-10-06 13:47:31 -04:00
parent c2d81c2412
commit 88d39fd544
2 changed files with 8 additions and 5 deletions
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5
fs/bcachefs/buckets.c
View File

@@ -473,8 +473,9 @@ static inline int update_replicas_list(struct btree_trans *trans,
d = trans->fs_usage_deltas;
n = (void *) d->d + d->used;
n->delta = sectors;
memcpy((void *) n + offsetof(struct replicas_delta, r),
r, replicas_entry_bytes(r));
unsafe_memcpy((void *) n + offsetof(struct replicas_delta, r),
r, replicas_entry_bytes(r),
"flexible array member embedded in strcuct with padding");
bch2_replicas_entry_sort(&n->r);
d->used += b;
return 0;

8
fs/bcachefs/extents.h
View File

@@ -642,9 +642,11 @@ static inline void bch2_bkey_append_ptr(struct bkey_i *k, struct bch_extent_ptr
ptr.type = 1 << BCH_EXTENT_ENTRY_ptr;
memcpy((void *) &k->v + bkey_val_bytes(&k->k),
&ptr,
sizeof(ptr));
unsafe_memcpy((void *) &k->v + bkey_val_bytes(&k->k),
&ptr,
sizeof(ptr),
"Our memcpy target is relative to a zero size array ,"
"compiler bounds checking doesn't work here");
k->k.u64s++;
break;
default: