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* [PATCH][next] io_uring: Fix incorrect sizeof operator for copy_from_user call
@ 2021-06-15 10:45 Colin King
  2021-06-15 10:47 ` Colin Ian King
  0 siblings, 1 reply; 5+ messages in thread
From: Colin King @ 2021-06-15 10:45 UTC (permalink / raw)
  To: Jens Axboe, Pavel Begunkov, io-uring; +Cc: kernel-janitors, linux-kernel

From: Colin Ian King <[email protected]>

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.

Addresses-Coverity: ("Sizeof not portable")
Fixes: d878c81610e1 ("io_uring: hide rsrc tag copy into generic helpers")
Signed-off-by: Colin Ian King <[email protected]>
---
 fs/io_uring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index d665c9419ad3..6b1a70449749 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7231,7 +7231,7 @@ static int io_rsrc_data_alloc(struct io_ring_ctx *ctx, rsrc_put_fn *do_put,
 		ret = -EFAULT;
 		for (i = 0; i < nr; i++) {
 			if (copy_from_user(io_get_tag_slot(data, i), &utags[i],
-					   sizeof(data->tags[i])))
+					   sizeof(*data->tags[i])))
 				goto fail;
 		}
 	}
-- 
2.31.1


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end of thread, other threads:[~2021-06-15 12:10 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2021-06-15 10:45 [PATCH][next] io_uring: Fix incorrect sizeof operator for copy_from_user call Colin King
2021-06-15 10:47 ` Colin Ian King
2021-06-15 11:30   ` Pavel Begunkov
2021-06-15 11:35     ` Colin Ian King
2021-06-15 12:10       ` Pavel Begunkov

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