From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Static analysis is warning that the sizeof being used is should be
of *data->tags[i] and not data->tags[i]. Although these are the same
size on 64 bit systems it is not a portable assumption to assume
this is true for all cases. Fix this by using a temporary pointer
tag_slot to make the code a clearer.
Addresses-Coverity: ("Sizeof not portable")
Fixes: d878c81610e1 ("io_uring: hide rsrc tag copy into generic helpers")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
V2: Use temp variable tag_slot, this makes code clearer as suggested by
Pavel Begunkov.
---
fs/io_uring.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index d665c9419ad3..7538d0878ff5 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7230,8 +7230,10 @@ static int io_rsrc_data_alloc(struct io_ring_ctx *ctx, rsrc_put_fn *do_put,
if (utags) {
ret = -EFAULT;
for (i = 0; i < nr; i++) {
- if (copy_from_user(io_get_tag_slot(data, i), &utags[i],
- sizeof(data->tags[i])))
+ u64 *tag_slot = io_get_tag_slot(data, i);
+
+ if (copy_from_user(tag_slot, &utags[i],
+ sizeof(*tag_slot)))
goto fail;
}
}
--
2.31.1
